Abstract: For changing services to readers who desires to obtain electronic books exactly or minutely, an electronic book management system 1 distributes at least electronic purchase certificates relating to books which are stocked at a bookstores owing a bookstore terminal device 2, in advance, to that bookstore terminal device 2. When buying the book(s), a reader obtains in an IC card 4 owned by her/him a purchase certificate(s) of that book(s) which she/he bought, from the bookstore terminal 2. When ordering to obtain the electronic book(s), the reader transmits the purchase certificate(s) from a reader terminal device 3 to the electronic book management system 1 through a communication network 5. The electronic book management system 1 changes over it's service when supplying the electronic book(s) to that reader depending upon the existence of the purchase certificate(s).

Abstract: A multimode wireless terminal suitable for received level monitoring for a base station serving as an intersystem handover destination includes a first wireless transmitter-receiver unit for GSM, a second wireless transmitter-receiver unit for WCDMA, and a communication processor unit and an antenna switch unit connected to these wireless transmitter-receiver units. While conducting communication with a WCDMA network system via the second wireless transmitter-receiver unit, a level of a signal received from a GSM base station is monitored via the first wireless transmitter-receiver unit. A communication processor unit determines whether the level monitoring is interfered with by a WCDMA transmission signal, on the basis of a relation between a WCDMA transmission frequency and a reception frequency supplied from the GSM base station.

Abstract: In a linear guide apparatus including an axially extending guide rail, a slider engaged with the guide rail, and a plurality of rolling elements loaded into the slider, the linear guide apparatus further includes a sealing device fixed to the slider in slidable contact with the guide rail for sealing a clearance existing between the guide rail and the slider, in which the sealing device includes: a lubricant-containing polymer member formed of a synthetic resin containing a lubricant, and having a contact portion contacting with the guide rail to surround the guide rail, both wing portions, a connecting portion connecting the wing portions to be C-shaped substantially, and a pair of first recesses formed in the respective wing portions for fixing the lubricant-containing polymer member to the slider; a first plate member fitted to the lubricant-containing polymer member opposed to the slider; and a pair of first cylindrical members inserted to the respective first recesses.

Abstract: Because there are different voltages at two current output terminals of a current divider, the voltages at the current input terminals of two current switch circuits are not affected mutually even with a large amplitude of local signals. Accordingly, the performance of a quadrature mixer can be enhanced by increasing the amplitude of the local signals. Bias currents are supplied to the two current switch circuits through the current divider from a common DC current source which essentially supplies a bias current to a V/I converter and, therefore, power consumption is reduced.

Abstract: An image captured by a camera can be sent to and stored in a controller on a LAN as well as to a high-capacity camera with more memory than other camera devices on the LAN and to a camera on another LAN. This allows captured images to be recorded without losing the images even if an irregular event is detected and an irregularity takes place in the camera device at the site.

Abstract: There is described a multi-layer printed circuit board and a method of installing it. The circuit board includes a first signal layer formed on its obverse surface; a ground layer arranged at a position next to the first signal layer; an electronic power source layer arranged at a position next to the ground layer; and a second signal layer formed on its reverse surface. The first and second patterns are formed around peripheral areas of the first and second signal layers, respectively. The first ground pattern and the second ground pattern are electrically coupled to each other by plural through holes, and the multi-layer printed circuit board is installed on an electro-conductive housing in such a manner that a substantially whole area of the second ground pattern electrically contacts a mounting area of the electro-conductive housing, the mounting area being an electro-conductive area continuously coupled to the electro-conductive housing.

Abstract: An electronic device having a printed circuit board having a ground, an electrically insulating layer provided on a face of the printed circuit board, and an electromagnetic shielding layer adhered to the face of the printed circuit board through the electrically insulating layer. The ground of the printed circuit board and the electromagnetic shielding layer are conducted electrically.

Abstract: Disclosed herein is a photographing apparatus or a portable terminal equipped with a photographing apparatus which surely restrains one from taking pictures in any area where photographing is prohibited. When the CCD camera 107 is turned on and the portable communication terminal 103 is set in the photographing mode, the short-distance wireless communication unit 113 is also turned on so that it is ready to receive photographing restrain information wirelessly transmitted from the photographing restrain information transmitting unit 101. If the short-distance wireless communication unit 113 receives photographing restrain information other than “photographing—prohibited”, then the control unit 117 controls the CCD camera based on the photographing restrain information, thereby permitting photographing the object 105 under some restrain.

Abstract: A signal receiving apparatus comprises an analog control AGC having a continuously varying gain and a step control AGC having a gain switched in steps, one of which is used to control the gain of a baseband signal, and the other of which is used to control the gain of the gain controlled signal.

Abstract: In a linear guide apparatus including an axially extending guide rail, a slider engaged with the guide rail, and a plurality of rolling elements loaded into the slider, the linear guide apparatus further includes a sealing device fixed to the slider in slidable contact with the guide rail for sealing a clearance existing between the guide rail and the slider, in which the sealing device includes a lubricant-containing polymer member formed of a synthetic resin containing a lubricant, and having a contact portion contacting with the guide rail to surround the guide rail, both wing portions, a connecting portion connecting the wing portions to be C-shaped substantially, and a pair of first recesses formed in the respective wing portions for fixing the lubricant-containing polymer member to the slider; a first plate member fitted to the lubricant-containing polymer member opposed to the slider; and a pair of first cylindrical members inserted to the respective first recesses.

Abstract: A digital broadcast recorder capable of recording a digital television (TV) signals, includes a first frequency converter which converts a received digitally modulated TV signal into a first intermediate frequency signal having a frequency lower than that of the digitally modulated TV signal, the first intermediate frequency signal having a frequency in a standard TV band and useable in demodulating standard TV signals, a band-pass filter coupled to the first frequency converter, which selectively passes-through the first intermediate frequency signal, a phase-lock loop (PLL) circuit coupled to the first frequency converter, which controls an oscillation frequency of a local oscillator in the first frequency converter, a second frequency converter coupled to the band-pass filter, which converts the first intermediate frequency signal passed through the band-pass filter into a second intermediate frequency signal lower in frequency than said first intermediate frequency signal a digital demodulator coupled to

Abstract: A digital broadcast recorder capable of recording digital television (TV) signals includes a first frequency converter which converts a received digitally modulated TV signal into a first intermediate frequency signal having a frequency lower than that of the digitally modulated TV signal, the first intermediate frequency signal having a frequency in a standard TV band and useable in demodulating standard TV signals, a band-pass filter coupled to the first frequency converter, which selectively passes-through the first intermediate frequency signal, a phase-lock loop (PLL) circuit coupled to the first frequency converter, which controls an oscillation frequency of a local oscillator in the first frequency converter, a second frequency converter coupled to the band-pass filter, which converts the first intermediate frequency signal passed through the band-pass filter into a second intermediate frequency signal lower in frequency than said first intermediate frequency signal a digital demodulator coupled to the

Abstract: In a linear guide apparatus including an axially extending guide rail, a slider engaged with the guide rail, and a plurality of rolling elements loaded into the slider, the linear guide apparatus further includes a sealing device fixed to the slider in slidable contact with the guide rail for sealing a clearance existing between the guide rail and the slider, in which the sealing device includes a lubricant-containing polymer member formed of a synthetic resin containing a lubricant, and having a contact portion contacting with the guide rail to surround the guide rail, both wing portions, a connecting portion connecting the wing portions to be C-shaped substantially, and a pair of first recesses formed in the respective wing portions for fixing the lubricant-containing polymer member to the slider; a first plate member fitted to the lubricant-containing polymer member opposed to the slider; and a pair of first cylindrical members inserted to the respective first recesses.

Abstract: An electronic device having a printed circuit board having a ground, an electrically insulating layer provided on a face of the printed circuit board, and an electromagnetic shielding layer adhered to the face of the printed circuit board through the electrically insulating layer. The ground of the printed circuit board and the electromagnetic shielding layer are conducted electrically.

Abstract: In a linear guide apparatus including an axially extending guide rail, a slider engaged with the guide-rail, and a plurality of rolling elements loaded into the slider, the linear guide apparatus further includes a sealing device fixed to the slider in slidable contact with the guide rail for sealing a clearance existing between the guide rail and the slider, in which the sealing device includes a lubricant-containing polymer member formed of a synthetic resin containing a lubricant, and having a contact portion contacting with the guide rail to surround the guide rail, both wing portions, a connecting portion connecting the wing portions to be C-shaped substantially, and a pair of first recesses formed in the respective wing portions for fixing the lubricant-containing polymer member to the slider; a first plate member fitted to the lubricant-containing polymer member opposed to the slider; and a pair of first cylindrical members inserted to the respective first recesses.

Abstract: In a linear guide which includes a guide rail, a slider and a plurality of rolling elements. The guide rail has at its outer surfaces rolling element rolling grooves extending in the axial direction thereof. The slider is assembled to the guide rail and has rolling element rolling grooves opposing to the rolling element rolling grooves of the guide rail. The plurality of rolling elements are filled within rolling element rolling paths formed by both the rolling grooves so as to toll freely therein. At least a part of the rolling element rolling grooves of the guide rail and the slider has a surface having the average roughness Ra along the center line of 0.20 &mgr;m or less, to thereby provide a linear guide in which reduction of a sliding resistance and generation of powder due to the abrasion caused by the initial abrasion is hardly caused.

Abstract: In a linear guide which includes a guide rail, a slider and a plurality of rolling elements. The guide rail has at its outer surfaces rolling element rolling grooves extending in the axial direction thereof. The slider is assembled to the guide rail and has rolling element rolling grooves opposing to the rolling element rolling grooves of the guide rail. The plurality of rolling elements are filled within rolling element rolling paths formed by both the rolling grooves so as to roll freely therein. At least a part of the rolling element rolling grooves of the guide rail and the slider has a surface having the average roughness Ra along the center line of 0.20 &mgr;m or less, to thereby provide a linear guide in which reduction of a sliding resistance and generation of powder due to the abrasion caused by the initial abrasion is hardly caused.

Abstract: In a linear guide apparatus including an axially extending guide rail, a slider engaged with the guide rail, and a plurality of rolling elements loaded into the slider, the linear guide apparatus further includes a sealing device fixed to the slider in slidable contact with the guide rail for sealing a clearance existing between the guide rail and the slider, in which the sealing device includes a lubricant-containing polymer member formed of a synthetic resin containing a lubricant, and having a contact portion contacting with the guide rail to surround the guide rail, both wing portions, a connecting portion connecting the wing portions to be C-shaped substantially, and a pair of first recesses formed in the respective wing portions for fixing the lubricant-containing polymer member to the slider; a first plate member fitted to the lubricant-containing polymer member opposed to the slider; and a pair of first cylindrical members inserted to the respective first recesses.

Abstract: An injection syringe including a device for preparation of an injection in situ, useful to the injection which is liable to suffer chemical changes if left for a long time in the state of solution or dispersion ready to inject. The injection syringe is portable by a patient who may prepare a necessary injection in situ with the use of a device included in the syringe which will automatically perform an injection with a prescribed dosage. The injection syringe includes a device for preparation of an injection, whereby mechanical impacts affecting the medicine and consequently, chemical changes with a medicine would be minimized during the step of dissolving the medicine. The syringe as noted is especially useful for preparation of injection and injection of human growth hormones, interferon and various polypeptides which are of an environmentally sensitive nature and liable to suffer chemical changes if left for a long time in the state of solution or dispersion.

Abstract: A sound deadening member for electrophotographic photoreceptor composed of a molded thermoplastic resin composition obtained by compounding at least 10 parts by weight of a copolymer (A) having a glass transition point of at least 40° C. and being made of from 10 to 90% by weight (meth)acrylic acid ester monomer(s) and not more than 90 parts by weight of a styrene-base resin (B) such that the sum total becomes 100 parts by weight and an electrophotographic photoreceptor having the sound deadening member for electrophotographic photoreceptor in the inside of the conductive substrate.