摘要:
An inverted-F antenna has at least two antenna conductive elements coupled in series via at least one switch. An antenna apparatus includes control means for controlling the at least one switch.
摘要:
In an information access system, an active contactless information storage device includes: a receiver unit adapted to sense a carrier of an RF signal at a first frequency for detection in a slave mode of operation and to be continuously ready to receive an RF signal at a second frequency different from the first frequency in a master mode of operation, and a transmitter unit for transmitting a response signal at the second frequency in response to reception of an information request signal in the slave mode of operation and for cyclically transmitting an information request signal at the first frequency in a transmission period and then go to an inactive state in a sleep period in the master mode of operation, under the control of the control unit. In the slave mode of operation, the control unit causes the transmitter unit and the receiver unit to go into the master mode of operation, when the receiver unit receives no information request signal in a first period of time longer than a plurality of the predetermined periods.
摘要:
An apparatus for determining a position of a mobile wireless station comprises means for determining the position of the mobile wireless station in accordance with a position of a first reference wireless station, a position of a second reference wireless station, a first relative angular direction between the mobile wireless station and the first reference wireless station, and a second relative angular direction between the mobile wireless station and the second reference wireless station.
摘要:
An information device system includes a terminal device and a personal computer. The terminal device has a USB interface and a wireless transceiver circuit. The personal computer has a USB controller which can communicate with the USB interface of the terminal device when they are connected with each other, and also a transceiver circuit adapted to wirelessly communicate with the wireless transceiver circuit of the terminal device. A record medium, which can be read by the personal computer, contains a program for judging what communication state the system is in, a cable communication state, a wireless communication state, or a non-communication state, and restricting processing the personal computer can perform in accordance with the result of the judgment. The degree of restriction is lowest when the system is in the cable communication state, intermediate when the system is in the wireless communication state, and highest when the system is in the non-communication state.
摘要:
There is provided an ultrasonic diagnostic system wherein received signals are generated in such a manner that ultrasonic pulse beams are transmitted within a subject and reflecting ultrasonic waves from an inside of the subject are received, and a tomographic image is obtained on the basis of the received signals. The ultrasonic diagnostic system is capable of detecting a velocity or a velocity gradient as to the tissue within the subject. Two digital complex signals [R.sub.i (t)+j I.sub.i (t)] and [R.sub.i (t+.DELTA..tau.)+j I.sub.i (t+.DELTA..tau.)], which are apart from each other by .DELTA..tau., are obtained from a complex signal (quadrature detection signal) [h.sub.ci (t)+j h.sub.si (t)] outputted from a complex signal conversion circuit. A phase difference .DELTA..theta..sub.i,i+1 (t) is determined from a complex correlation value C.sub.i,i (t,.DELTA..tau.) of these two complex signals. Further, the phase difference .DELTA..theta..sub.i,i+1 (t) is determined from a complex correlation value C.sub.i,i+1 (t) of signal-to-signal during repetition of transmission of ultrasonic pulse beams. Using these phase differences, time difference .DELTA. t corresponding to a movement quantity within the subject is calculated on the basis of equation:.DELTA.t=.DELTA..theta..sub.i,i+1 (t).multidot..DELTA..tau./{.DELTA..theta..sub.i,i (t, .DELTA.t)-.omega..sub.o .DELTA..tau.}
摘要:
The present invention relates to an ultrasonic echographic diagnostic apparatus which is capable of displaying the characteristics and properties of tissue, such as the maximum displacement of tissue, the hardness of tissue, the velocity of propagation of vibrations through tissue, and the magnitude and direction of movement of tissue, in various display modes. The apparatus is capable of detecting and displaying the displacement of tissue caused by heartbeat or external pressure in a real-time mode by calculating the minute displacement of tissue or the differential of the same, calculating a temporal local maximum of the minute displacement varying with time, time corresponding to the temporal local maximum, the gradient of the time and the absolute magnitude of the gradient, and displaying the results of the calculations. In another aspect of the invention, the apparatus specifies a desired point or points and a desired direction or directions in a tomogram, determines calculating data passing a desired point and extending along a desired direction, for a plurality of tomograms obtained at different times, respectively, by interpolating the data signals, determines the displacement of the desired point in the desired direction or the rate of change of the displacement on the basis of the calculating data, and displays the information calculated on the basis of the displacement or the rate of change of the displacement.
摘要:
A digital X-ray image read apparatus having a correction function. The apparatus includes an excitation beam generation source for irradiating the excitation beam onto a photostimulable phosphor plate to generate a fluorescent light. A collection unit collects the fluorescent light of the photostimulable phosphor plate after excitation and a photomultiplier unit, connected to the collection unit, converts the fluorescent light to an analog electrical signal after multiplication. An analog-to-digital converter, connected to the photomultiplier unit, converts the analog electrical signal to a digital X-ray image signal. A correction unit, connected to the analog-to-digital converter, corrects the digital X-ray image based on a predetermined formula obtained from an amount of the fluorescent light and an afterglow thereof. An image memory connected to the correction unit, stores the X-ray image after correction.
摘要:
An information processing apparatus includes a user interface, a switching unit, and a computer. The user interface is for a user that operates a first processing unit that runs a first operating system or a second processing unit that runs a second operating system. The switching unit selectively switches between the first processing unit and the second processing unit to be associated with the user interface. The computer functions as the first processing unit. The computer functions as the second processing unit. The computer runs a first application program on the first operating system. The computer activates, on the second operating system, a second application program related to the first application program, in a state in which the first processing unit is associated with the user interface. The computer controls the switching unit upon completion of the activation of the second application program.
摘要:
An information terminal includes: a wireless communication section configured to communicate with an outside; a main functional section configured to perform an information processing operation that includes data communication with the outside, performed using the wireless communication section; a monitoring section configured to detect a state of power supply for the main functional section; and a communication control section configured to cause the wireless communication section to transmit data, preliminarily stored in a memory, to the outside when the state detected by the monitoring section corresponds to a state in which the main functional section is not capable of performing data communication using the wireless communication section.
摘要:
A terminal apparatus adapted to receive a wireless signal by antenna diversity, wherein provisions are made to reduce the number of receive circuits while also reducing the time required for antenna selection. The a terminal apparatus is adapted to receive a wireless signal by antenna diversity, and includes: a mode-of-use detection unit for detecting the mode of use of the terminal apparatus as set up by a user; a storage unit for storing priority information that predefines an antenna to be selected for use by prioritizing the plurality of antennas according to the mode of use that can be detected by the mode-of-use detection unit; and a comparator for outputting selection control information specifying at least one antenna from among the plurality of antennas by comparing the mode of use detected by the mode-of-use detection unit with the priority information stored in the storage unit.