Abstract: A Web server computer system provides for server based controlled management over a client reference to a resource locator independently selected by a client computer system and referencing a server external Web server. The Web server system provides a client system with a predetermined URL reference to the Web server system encoded with predetermined redirection and accounting data including a reference to a second server system On receipt by the first Web server system of the predetermined URL reference from the client system, the predetermined redirection and accounting data is decoded from the predetermined URL and processed by the Web server system to provide the client system with a redirection message including the reference to the second server system. The accounting data is processed by the Web server system and resulting data is selectively stored by the Web server system.

Abstract: A document search method using a plurality of databases available from one or more servers using one or more search engines. For each database, the number of records is determined and reported, as well as frequency of search query term occurances or hits, together with identification of database records corresponding to the hits. Reports from a plurality of databases are furnished to a user terminal, a client, where client software computes a relevance score for each record based upon the number of records in the database, the number of records having at least one hit and the number of hits for each record. This local computation from uniform data allows all documents to be ranked consistently as if coming from a single database.

Abstract: A detector of an electro-optical mouse having two linear arrays of detector cells at right angles to each other. One linear array images a line and a space in the X direction, while another linear array images a line and a space in the Y direction. Changes in contrast level indicate line crossings. Each linear array has four cells, adjacent cells being 90.degree. out-of-phase with each other. By pairing first and third cells and second and fourth cells of each linear array, then subtracting the output of these, a 180.degree. shift between the cells enhances discrimination of lines and spaces. Lines may be of two colors, or of a single color with optically contrasting line intersections, so long as a total of three contrast levels can be observed by the detector. Counting means is provided for counting line crossings so that observed detector motion on the surface can be made to correspond to cursor motion for a video display.

Abstract: A high speed sampling technique is proposed using a cascade of optical waveguide interferometers driven by CW sinusoidal traveling or standing microwaves. Each interferometer multiplies the optical signal by a function closely approximated by cos.sup.4 .omega.t, where .omega. is the frequency of its microwave drive. A cascade of four interferometers with 2.6 V microwave drives at 10, 20, 40, and 80 GHz and a total length of 2 cm can sample an optical signal with 2 ps resolution and 50 ps between samples.

Abstract: A position control system employing a movable detector means which communicates energy to and from a pattern of passive, position-related indicia or marks on a surface. In the preferred embodiment the movable detector means includes a light source and a four-quadrant detector, with the surface having a high contrast checkerboard square pattern. The four-quadrant detector will report different states as the detector means is moved across different squares. The states are decoded in a lookup table and electrical signals are generated for controlling X and Y registers of a cursor control or the like.

Abstract: A position control system employing a movable detector means which slides over a surface having passive, position related marks of two colors. In the preferred embodiment, the detector means includes a light source which sequentially alternates between one color and the other. A four-quadrant light detector is positioned for receiving the light reflected from the two groups of lines. By clocking emission of the two colors and the detector output signal, electrical outputs are obtained representing reflection from the first and second groups of lines. Such signals are used to establish line crossings, thereby deriving a position signal for a cursor or the like. In an alternate embodiment, continuous sources of the two colors are used to illuminate the lines. Two dual-segment detectors, each sensitive to one of the colors, are used to generate outputs indicative of line crossings, thereby deriving the position signal for a cursor.