A system for providing video communication services to one or more premises with video communications-services users, comprising a first premises network, a plurality of user workstations interconnected by the first premises network, and a multimedia central office being in communication with the first premise network and a public digital network. The multimedia central office, in use, transceives audio, video and digital data signals for providing at least switching functions originating at or …

An embodiment of the present invention is a method of fabricating a semiconductor device. The method comprises forming a film of bottom electrode material entirely over the dielectric film; etching the bottom electrode film to partially define a sidewall of each of bottom electrodes; forming a film of ferroelectric material on the remainder of the bottom electrode film and the exposed surface of the dielectric film; forming a film of top electrode material on the ferroelectric film; and etching …

In order to operate a modular control system that has a central processor (Z) and a plurality of peripheral modules (Bn) connected thereto, the inputs (In) and outputs (Qn) of the central processor (Z) and of each of the peripheral modules (Bn) are successively entered, without any gaps, into a process image (PA) during an initialization phase.

A second clock is generated as an intermittent train of pulses by removing some pulses from a first clock having a predetermined period, and is supplied as an internal clock to internal circuits of a semiconductor integrated circuit device. At the same time, a current generating circuit for consuming a power supply current is operated in timed relation to a third clock which comprises a train of pulses to be removed from the first clock.

An ultrasonic imaging apparatus capable of scanning an object at a high speed while obtaining necessary information. The apparatus includes an ultrasonic probe for transmitting and receiving ultrasonic waves, an excitation timing controller for providing delays to a plurality of drive signals so as to scan the object by using the ultrasonic beam with a scanning line density, a phase matching calculating unit for processing electric signals obtained by receiving the ultrasonic echoes to obtain de…

A fine carbon fiber mixture produced through a vapor-growth process, which comprises fine carbon fiber, each fiber filament of the fiber having an outer diameter of 1 to 500 nm and an aspect ratio of 10 to 15,000 and comprising a hollow space extending along its center axis and a multi-layer sheath structure consisting of a plurality of carbon layers; and non-fibrous carbon such as flake-like carbon, granular carbon, or sheet-like carbon. A composition comprising a resin or a rubber and a fine c…

In an information processing apparatus for conducting an affine transformation representative of ##EQU1## a matrix ##EQU2## obtained by multiplying a matrix A for the affine transformation by .lambda.(.noteq.0) is stored in a memory section in advance. In case of conducting calculation processing for transforming coordinates (x,y,z).sup.t into coordinates (x’,y’,z’).sup.t by means of the affine transformation, A’ and a matrix (t.sub.1,t.sub.2,t.sub.3).sup.t are read from the memory section, are …

Disclosed is a device management network system that is capable of monitoring all abnormalities that has occurred in a network device. The device management network system includes a management server, client devices, and network devices to be managed. The management server, when receiving a device-details screen request from a certain client device running a Web browser, collects MIB objects from the printing device specified by the information in the device-details screen request. Then, the ma…

A pressure generator is driven to eject ink droplets from a nozzle orifice such that a plurality of flushing operations are intermittently repeated with a first time interval, when a recording operation of a recording head is not performed. Each flushing operation includes a plurality of ink ejections repeated for a predetermined times with a second time interval which is shorter than the first time interval. The ink near the nozzle orifice is residually vibrated between the flushing operations,…

In a semiconductor integrated circuit device having a DRAM 30, the DRAM 30 has an internal refresh period measuring circuit 20. Supplied with a test mode command as an external command, a command decode portion 32 delivers a test mode signal TM1 to the internal refresh period measuring circuit 20, supplies external clocks CLK as reference clocks ICLK to the internal refresh period measuring circuit 20, and thereafter activates a self-refresh control circuit 33. When activated, the self-refresh c…