Showing papers on "Cover (telecommunications) published in 1998"

Performance of Computer Communication Systems: A Model-Based Approach

Abstract: From the Publisher: Written by an internationally renowned expert in computer communications systems engineering, this title is the first book to cover all major techniques of performance evaluation of computer communication systems, including assessment techniques for single server queues, networks of queues and stochastic Petri nets.

Performance of double phase encoding encryption technique using binarized encrypted images

Abstract: We investigate the performance of an image encryption tech- nique that uses random-phase encoding in both the input plane and the Fourier plane, using partial information of the encrypted image. We first investigate the phase-only information of the encrypted data for decryp- tion. A binary version of the phase-only information is also considered for decryption. Binary images are well suited for optical display and practical implementation. Using partial information of the encrypted image, a re- constructed complex image is generated, which is used for decryption. Tests are performed for both gray-scale and binary images. We show that the phase information of the encrypted image is very important in the reconstruction of the decrypted image. Computer simulations show that for the images tested here, binarization of the encrypted image can re- cover the original image with low mean squared error. © 1998 Society of Photo-Optical Instrumentation Engineers. (S0091-3286(98)04302-5) noise. 3 The fault-tolerance properties of this technique were investigated in Ref. 4. In this paper, we evaluate the phase information of the encrypted image and investigate the ef- fect of its binarization on the recovered image. We give the reasons for the binarization of the encrypted image, and tackle the problems raised by it. It is shown that postpro- cessing of the decrypted image can improve the quality of the recovered images. We show, for the images tested here, that recovered images of very good quality can be obtained.

In-wall electronic timer

Abstract: An in-wall mounted electric timer comprising a housing for mounting in an electric box in a wall. The electric timer comprises a user interface on the housing. The user-interface comprises an input panel and a display. The electric timer further includes a movable cover panel covering the user interface. The cover panel has a rearward extending post aligned with the input panel to operate the input panel by moving action of the cover panel, wherein at least a portion of the cover panel is transparent enabling observation of the display through the cover panel.

Data hiding in images via multiple-based number conversion and lossy compression

Abstract: A novel and easy method to embed any form of secret messages into a cover image with controlled distortion is proposed. Any lossy image compressor may be applied first to a cover image to produce a lossily-processed result as the basis for embedding data in the cover image. The stego-image is produced by embedding data in each pixel of a cover image by changing its gray value without excessing the range of the gray value difference of the corresponding pixels of the cover image and its lossily-processed one. The quantity of distortion that is caused by embedding data is never in excess of that is caused by the lossy compressor. A multiple-based number system is proposed to convert the information in the secret bit stream into values to be embedded in the choosing pixels of the cover image. Pseudo-random mechanisms may be used to achieve cryptography. It is found from experiments that the values of the peaks of the signal-to-noise ratio of the stego-images are larger than those yielded by the chosen compressor, which means that the distortion in the embedding result is more imperceptible than that in the compressed one.

Telecommunication apparatus having dual keypads

Abstract: Dual keypads are provided on alternate sides of a flip cover (12) that is pivotally attached to the housing (14) of a telecommunications instrument, such as a cellular telephone. One of the keypads is operable when the cover is in a closed position, and the other keypad operable when the cover is in an open position.

Security device for luggage

Abstract: A security device, for a backpack 51 , comprises a cover in the form of a wire netting 50 that is held snugly to the backpack by a draw line 53 . The draw line is taughtened and locked tight with a locking mechanism 54. The cover prevents tampering with or removing the backpack from the wearer, and especially the slicing open of backpack to remove its contents.

Device for containing, concealing, and protecting footwear fasteners

Abstract: A device for containing, concealing and protecting footwear fasteners to keep the fasteners secure, clean, concealed and protected from snagging on foreign objects. The device is made of a pliable material so as to prevent injury in the event that the wearer or some other person comes into contact with the device. The device has a cover that may display fashionable designs and emblems, or reflective material for use in the dark.

Handwritten instructions for messaging appliances

Abstract: A messaging device has a message reception component configured to receive a printable message from a message originator, and a printer that prints the received message and that also prints an origin identifier of the message originator on the print medium. After the message is printed, a user marks it up for reply to the message originator. The messaging device has an optical scanner and optical recognition logic that detects the origin identifier and that instructs the messaging device to send the annotated message back to the message originator. In addition, the optical recognition logic recognizes instructions written on handwritten cover sheets. By preparing such a cover sheet with handwritten instructions, a user can instruct the message device regarding various transmission parameters such as recipients and recipients' telephone or facsimile numbers.

Vehicle spare tire storage system

Abstract: A cover for a spare tire storage system including a tub located beneath a floor of a vehicle. The cover includes a pivoting element utilized to pivot the cover to gain access to the tub. The pivoting element is also capable of being removed so that the entire cover can be removed from the vehicle and used as a working mat.

Second Generation Mobile and Wireless Networks

Abstract: This book will cover the topology of PCS networks and special equipment requirements, the design, configuration and maintenance of PCS nets. And as in all Uyless Black titles, related technologies will be discussed throughout. In this book, he will discuss the relationship of PCS to CDMA and TDMA (two rival technologies for the allocation of frequencies).

Cover for temporarily altering traffic signs

Abstract: A cover or envelope having one open end fits over a traffic sign to cover the sign and its message; new information is presented to motorists by appropriate indicia on a front outer surface of the envelope. A rear side of the envelope includes a slit in its center; the slit extends most of the length of the back side and opens to accommodate the bulk of a post or standard on which the sign is mounted. At the bottom, open edge of the cover, metal rods are incorporated into hems on the cover's edge and have protruding loops or tabs thereon; the loops receive a padlock or other means by which the cover is secured in place over the signboard to prevent the cover's unauthorized removal. For a diamond-shaped signboard, two perpendicular slits divide the rear of the cover into triangular panels.

Tool bit holder

Abstract: A cylindrical tool bit holder has a rotatably operable cylindrical cover for access to clip mounted tool chuck and tool bits disposed on the inside of the cover, and an integral clip affixed to the holder body for tool belt mounting of the holder, whereby the user with the holder belt mounted, rotatably removes the cover and inspects the array of tool bits and then in turn with the other hand removes the chuck for assembly to the hand tool or then removes a tool bit for assembly to the chuck. After removal of the chuck and tool bit, the cover is rotatably replaced on the cylindrical body of the holder and rotated no more than 120° for locking engagement of the cover on the body. The cover is formed with equally spaced flexible tabs each having respective buttons for slidably engaging into holes on the body, for locking and unlocking the cover to the body. The cover is removed and replaced with the user using only one hand.

Computer system securing apparatus and method with concealed security tab

Abstract: The present invention provides for an apparatus and method for securing a computer system. A security loop or tab is attached to a computer chassis and used to engage a cover that encloses at least a portion of a side of the computer chassis. Structure is provided in embodiments of the invention to releasably engage the cover with the security tab and to provide a means of locking the cover on the chassis to prevent unauthorized access to the computer system. Additionally, the securing apparatus is place in a location not readily visible to users of the computer system.

Prepaid value card and its manufacturing process

Abstract: of EP0896296A card type data carrier (12) has one or more data areas (16) on which visual data has been written or attached in some manner and a cover (18) for the data that is destroyed by its removal.

Optical transmitting and receiving device

Abstract: The device (1) has at least one transmitter unit and at least one receiver device. It also has a cover (4) which allows light to pass through, at least in the region of the transmitter and receiver units. The light transmitted from the transmitter is reflected outside the cover and is received by the receiver. A light conductor arrangement is provided inside the housing in front of the cover between the transmitter unit and the receiver unit. Either only the light component reflected at the transmitter unit cover from inside or only the light component passing through the cover from outside can be conveyed for analysis to the receiver unit.

Portable telephone handset construction

Abstract: A telephone handset construction is provided, which has a movable cover which is articulable from a closed position to an open position. The cover has a rigid portion and a flexible portion. When the cover is in the closed position, the flexible portion thereof is furled around front and top portions of the main body of the telephone handset. Upon deployment of the cover, by pulling the rigid portion of the cover in a direction away from the main body of the handset, the flexible portion of the cover is unfurled and moved to a position substantially covering the back of the main body portion of the handset.

A radio handset having an integral stand

Abstract: A radio handset 20 is provided with an integral stand 22 either hinged to its main body or battery, to support it in its upright position. The stand may be in the form of a cover, such as a flip or slide and the operation of the handset may be controlled depending upon the position of the cover.

Beginning Visual Basic 6 Database Programming

Abstract: From the Publisher: Out concurrently with the new release of VB6, this book uses the same winningtutorial format as "Beginning Visual Basic 5". Chapters cover everything fromdatabase design to SQL to client server, all at a fast pace.

System and method for securely storing and transporting detachable personal items in a travel case

Abstract: This present invention is a storage system for organizing and transporting detachable cosmetics, cosmetic equipment, and other personal items. The system and method for securely storing and transporting detachable cosmetics, cosmetic equipment, and other personal items includes a top cover; a bottom cover hingedly attached to the top cover at a rectangular side; a fastener system for fastening the top cover to the bottom cover in a closed position; an internal lining of touch fastener material on the top cover and the bottom cover; a plurality of touch fastener decals matched to the internal lining of the top and bottom cover to provide a method of attaching cosmetics, cosmetic equipment, and other personal items to the interior of the travel case; and a cooling system proximate to the travel case.

Belt clip having integrated electrical connector protective cover retention area and method of using same

Abstract: A belt clip (100) use with an electronic device includes an attachment member (101) for securing the electric device to a fixed object such as a person's belt. The attachment member (101) includes a protective cover retention area (107) for enabling a protective cover (13), that is used as a port or dust cover for protecting unused electrical connectors, to be frictionally engaged therein.

A mobile telephone with a cover flap for displaying user information

Abstract: A portable telephone has a microphone, a keypad 2, an electronic display screen 3, radiowave transmitting and receiving means and a housing comprising a cover flap 5 for reflecting speech towards the microphone The cover flap incorporates an information surface 22 ie can have information presented upon it such as function commands or key sequences in case the operating manual is not at hand The information may be printed directly onto the cover flap, a sticker may applied to the flap (fig 2) Information cards, credit cards or a book may be fastened to the flap (fig3,4 and 5) The cover flap may contain a sliding drawer upon which the information is mounted (fig7) Another hinged flap may cover a recess containing the information card (fig6)

Internet acceptable usage policies writing and implementation

Abstract: The job of an acceptable use policy is to explain what the organization considers acceptable Internet and computer use and to protect both employees and the organization from the ramifications of illegal actions. This article describes how such policies are written, what they should cover, and how they are most effectively activated.

Electronic computer having file bay cover with electronic lock and its control method

Abstract: PROBLEM TO BE SOLVED: To improve the efficiency of a centralized management system and to improve the security for an administrator or user of the electronic computer by providing a lock for opening and closing the file bay cover and a cover sensor which confirms that the cover is locked, and unlocking the cover under electronic control. SOLUTION: The lock for opening and closing the file bay cover and the cover sensor for confirming that the cover is locked are provided and the cover is unlocked under electronic control. The file bay cover 4 is provided with a latch 107 and an electronic lock 105 composed of an opening/closing sensor 104 and a solenoid part 106 is embedded in a recessed part 103 provided on a housing 2 at a position meeting the latch 107 when the file bay cover 4 is closed. When the file bay cover 4 which is opened is closed, the latch 107 comes into contact with the opening/closing sensor 104, which detects a state wherein a lock can be made and protrudes the iron core 106a of the solenoid part 106 to lock the file bay cover 4.

Monitor protection cover

Abstract: PROBLEM TO BE SOLVED: To provide an inexpensive protection cover with a simple structure used for a video camera with a liquid crystal display monitor that is attached/ detached stably and in which a video image on the liquid crystal display monitor is confirmed without removing the cover, the protection cover in which reflection of an external light made incident onto the monitor is adjusted and only the user sees the video image in addition to the features above, and the small sized protection cover with a function of a remote commander and which is stably attached and detached. SOLUTION: This monitor protection cover 1 that is removably fitted to a camcorder 4 having a recording and reproducing section, a monitor section and a camera section and has a function of protecting the monitor section is provided with an open/close free blind to a side of the cover 1 opposite to the monitor section so as to allow the user to visually recognize the monitor. Or a transparent cover may be in use or a remote command function is provided to obtain the protection cover in common use for a remote commander.

A radio handset

Abstract: A radio handset (20) is provided with an integral stand (22)either hinged to its main body or battery, to support it in its upright position. The stand may be in the form of a cover, such as a flip or slide and the operation of the handset may be controlled depending upon the position of the cover.

Chip card reader with a card presence switch mounted in the cover

Abstract: The invention relates to a chip card reader with a frame and/or contact support supporting reading contacts with a cover fixable on the contact support and with a limiting switch, wherein the limiting switch is located in the cover.

Printer having a paper out/cover open sensor and method therefor

Abstract: A printer has a control circuit to stop a print head from printing when paper runs out or when the cover of the printer is opened is disclosed. Only one switch is used to detect the absence of paper and the position of the cover.