Abstract: A method for performing a search of a plurality of documents for similarity to a query word includes retrieving a first document, and determining a number of occurrences of the at least one query word in the first document. Then, a next document is retrieved and a number of occurrences of the at least one query word in the next document is determined. The steps are repeated until each of the plurality of documents have been retrieved, and the number of occurrences of the at least one query word has been determined in each of the plurality of documents. The query word can include a plurality of query words, all of which are searched in each document, in turn, rather than being searched word by word in the whole collection of documents. The documents are then ranked according to the number of occurrences of the query words determined in each document, and a list of documents is produced according to the document ranking.

Abstract: A color-image forming apparatus includes: an electrostatic latent image holder; electrostatic latent image forming unit for forming a plurality of electrostatic latent images on the image holder; a scanning unit for scanning the electrostatic latent image holder periodically at predetermined timings; developing devices for developing each of the plurality of electrostatic latent images by toners of each of different colors respectively, and forming thus developed toner image on the image holder; a simultaneously transferring device for simultaneously transferring the plurality of toner images onto a transfer medium; fixing device for fixing the toner image on the transfer medium; and timing-setting unit for setting a timing at which said scanning means starts scanning at each of slow scanning pitches in the direction of fast scanning for each of the plurality of colors; wherein the timings which are allotted to each of the colors are different each other so that the starting position of the scanning of each c

Abstract: In an image processing apparatus, digital video data is converted into analog video data by a D/A converter. A reference pattern timing-adjusted is generated. The phase relationship between the reference pattern and the analog video data is optimized. The analog video data and the reference pattern are compared by comparing unit. A pulse-width modulated signal output from the comparing unit is detected. The variable output regulator is controlled according to a preset reference value, a quantity of laser light of the output device, or a surface potential of the photoreceptor. Through the control of the regulator, the quantity of bias applied to the reference pattern is optimized at all times, providing a pulse-width modulated image signal with an excellent tone reproduction at all times.

Abstract: A circuit for enabling data transfer between one data bus connected to a number of devices, such as accelerator cards, and a second data bus, such as one found in a computer. The two data busses are connected by a number of FIFO buffers, and an arbitrator selects a source and destination for each packet. The circuit allows the computer to freeze the data in any or all buffers so that it can be inspected and changed if necessary, but only after the entire current packet for the selected buffer or buffers has been transferred.

Abstract: A method for searching a document corpus for query terms includes generating a list of document terms including a term signature for each term based upon characteristics of a number of adjacent terms. The term signatures can be generated by generating a bit vector for each term within a predetermined adjacent number of terms from each document term, such as through application of a hash function. The bit vectors can then be combined to form the term signature. The word signature alternatively can be generated using one or more morphological properties of the terms. The predetermined adjacent number of terms can be the number of search terms minus one, and may precede, follow, or both precede and follow the document term for which the term signature is generated. A search signature is generated for the query terms excluding a reference term, based upon the predetermined characteristics.

Abstract: An electrostatic copying machine including a drum that supports a photoreceptor belt. The drum includes a mechanism for reducing the drum perimeter, allowing a user to replace the photoreceptor belt.

Abstract: A font information transfer system in a network system including a network, a workstation, and a printer connected to the workstation through the network. In the font information transfer system, the workstation includes a font information generation section for generating information for generating a font, and the printer includes a font generation section for generating the font on the basis of the font information transferred from the workstation.

Abstract: In a xerographic printer for tri-level highlight color imaging, two electrostatic voltmeters (ESVs) are used to interpolate the electrostatic potential at a particular location along the path of the photoreceptor belt. Anomalous ESV readings, such as would be caused by dirt interfering with the ESV itself as opposed to systemic changes in the whole apparatus, are detected by having the printer enter a "test mode" in which test patches having minimal charge are monitored by the ESVs. The low-charge test patches enable noise related directly to the ESVs to be isolated from other possible sources of noise. The noise which results from ESV malfunctioning is compensated for when the printer returns to operation.

Abstract: A thermal ink jet printing composition contains a surfactant comprising an alkylsulfoxide having an alkyl group of 4 to 6 carbon atoms. Preferably, the composition contains a betaine zwitterionic base and dibutylsulfoxide.

Abstract: An image density controlling device for an image formation apparatus includes a plurality of image formation devices. A plurality of transfer members carry an image formed by at least one of the plurality of image formation devices. A belt rotates synchronously with the operation of the image formation devices and carries the transfer members. The belt includes a plurality of transfer member carrying areas on which the plurality of the transfer members are respectively carried, and a plurality of non-carrying areas therebetween. A density detection toner image is formed in the non-carrying area by utilizing at least one of the plurality of image formation devices. The density of the density detection toner image is determined to output a density detection signal. The densities of the images transferred to the transfer members are then controlled in accordance with the density detection signal.

Abstract: Methods and devices for implementing hyperacuity sensing are provided. The imaging device comprises a sensor array including sensor elements, each of which provides intracellular spatial intensity distribution information necessary to render images with subpixel accuracy. The method includes the step of hyperacuity sensing implemented using sensors that output signals that are dependent upon the internal intensity distribution of impinging light. The output signals are processed to determine the internal intensity distribution, which can then be used to produce a hyperacuity image. Such a hyperacuity image has enhanced definition of edges, and reduced artifacts such as jaggies and moire effects.

Abstract: A method and apparatus for ejecting droplets from the crests of capillary waves riding on the free surface of a liquid by parametrically pumping the capillary waves with electric fields from probes located near the crests. Crest stabilizers are beneficially used to fix the spatial locations of the capillary wave crests near the probes. The probes are beneficially switchably connected to an AC voltage supply having an output that is synchronized with the crest motion. When the AC voltage is applied to the probes, the resulting electric field adds sufficient energy to the system so that the surface tension of the liquid is overcome and a droplet is ejected. The AC voltage is synchronized such that the droplet is ejected about when the electric field is near is minimum value. A plurality of droplet ejectors are arranged and the AC voltage is switchably applied so that ejected droplets form a predetermined image on a recording surface.

Abstract: There is disclosed a layout of a high voltage Darlington pair in which a circular field plate is utilized for both high voltage transistors in order to reduce the layout area. In this layout, both transistors of a Darlington pair are circular transistors and they both have a common center. This enables both high voltage transistors to share one field plate ring and one collector ring.

Abstract: A printing paper comprises a paper substrate and a coating layer formed on at least one side of the substrate and formed from a coating composition comprising a white pigment and a water-soluble resin in an amount of from 4 to 10 g/m.sup.2. When the paper sheet is divided or split into a printing surface layer and a non-printing surface layer, a difference in shrinking rate along a cross direction between the printing surface layer and the non-printing surface layer is within a range of .+-.0.1%. The paper can suppress curling on printing.

Abstract: Disclosed is a process which comprises (1) incorporating into a printing apparatus capable of generating ink jet images a carbonless paper set comprising a first sheet, a second sheet, and optional intermediate sheets situated between the first sheet and second sheet, wherein the first sheet comprises paper coated on one surface with a color former and the second sheet comprises paper coated on one surface with a color developer, and wherein, when the carbonless paper set is assembled, the surface of the first sheet coated with the color former is in contact with the surface of a sheet coated with the color developer and the surface of the second sheet coated with the color developer is in contact with the surface of a sheet coated with the color former; (2) incorporating into the printing apparatus an ink jet ink comprising (a) water; (b) a member selected from the group consisting of glycols, sulfolane, and mixtures thereof; (c) optionally, a member selected from the group consisting of ethanol, isopropanol

Abstract: A method for the recording and retrieval of information relevant to the activities of a user. The invention may be employed to provide a memory prosthesis in the form of a highly portable device which records all kinds of information about the user's life, and provides a simple and rapid means of access to that information. The device receives and stores information from external sources, or objects, or from signal generators identifying specific machines, places, or people carrying other ones of the same type of device. Events comprising encounters between objects are recorded automatically, being time-stamped and stored chronologically, and a rapid search method for such a database is disclosed. The data can either be stored in the memory of the device itself, or, for better protection against failure, in a central data repository of the system, with a fail-safe backup.

Abstract: Disclosed is a process which comprises (a) providing a migration imaging member which comprises a substrate and a softenable layer comprising a softenable material and a photosensitive migration marking material; (b) providing a printing plate precursor which comprises a base layer and a layer of photosensitive material selected from the group consisting of photohardenable materials and photosoftenable materials; (c) placing the softenable layer of the migration imaging member in contact with the layer of photosensitive material of the printing plate precursor and applying heat and pressure to the migration imaging member and printing plate precursor, thereby causing the softenable layer of the migration imaging member to adhere to the layer of photosensitive material of the printing plate precursor; (d) uniformly charging the migration imaging member; (e) subsequent to step (d), exposing the charged imaging member to activating radiation at a wavelength to which the migration marking material is sensitive; (

Abstract: A negatively charged toner composition comprised of a polymer resin or polymer resins, colorants comprised of pigment particles and/or dyes, optional surface additives, and a boron charge enhancing additive obtained from the reaction of an alkylboric acid or an arylboric acid and an N-alkyl- or N-aryl-substituted bis(hydroxyalkyl)amine, or a zinc charge enhancing additive obtained from the reaction of an aromatic carboxylic acid and an N-alkyl- or N-aryl-substituted bis(hydroxyalkyl)amine with a zinc ion-containing compound in aqueous medium.

Abstract: A hybrid ink jet print head has at least one ink channel with an open end that serves as a nozzle. A first reservoir holds a hot melt ink and a first inlet allows the hot melt ink to flow from the first reservoir into the ink channel. A heater plate heats the hot melt ink held in the at least one ink channel. A second reservoir holds a thermal liquid and a second inlet allows the thermal liquid to flow into the ink channel. The second inlet is spaced further from the nozzle than is the first inlet. A heating element is positioned in the ink channel between the first and second inlets. An interconnect is secured at one end to the heating element. Selective application of current pulses along the interconnect to the heating element vaporizes the thermal liquid and forms a bubble in the ink channel. The bubble then acts on the hot melt ink in the ink channel to eject hot melt ink droplets at the nozzle.

Abstract: In an overfilled polygon ROS architecture, fast scan jitter is reduced by uniformly illuminating the overfilled facets. In one embodiment, the collimator lens is designed with a long focal length to transmit only the more uniform central portion of the Gaussian shaped intensity profile output of a laser diode. In another embodiment, the light level at the polygon facet is made uniform by introducing a variable transmission filter along the optical path.