Abstract: A novel transition metal compound wherein the transition metal belongs to group 4 of the periodic table and the transition metal compound has a hydrogen atom ligand and three cyclopentadienyl ligands comprising at least one substituted cyclopentadienyl ligand. The novel transition metal compound can be used as a component of a catalyst exhibiting high activity for olefin polymerization and is characteristic in containing no halogen element.

Abstract: Liquid crystalline compositions contain no functional group the synthesis of which is difficult, such as (meth)acrylate and epoxy group and comprise (A) an oxetane compound having an optically active portion, (B) a side chain liquid crystalline polymeric substance having an oxetanyl group, and (C) a photo cation generator and/or a thermal cation generator. The use of the composition can provide a cholesteric-aligned liquid crystal film with excellent alignment retention properties after being fixed in the liquid crystal state and mechanical strength, without employing any complicated step such as photo irradiation under an inert gas atmosphere.

Abstract: An object identification structure for generally distributed products is provided which is extremely hard to forge, high in identifiability, and can be manufactured inexpensively. The object identification structure comprises a single layer cholesteric liquid crystal film which is substantially colorless and transparent when viewed from the front and appears colored when viewed from a predetermined oblique direction.

Abstract: An ATM network for synchronously perform a path connection control at a plurality of nodes, wherein path control data are preliminarily supplied to the nodes from a network management system before a designated operation time. Each node generates a current time synchronously with a network synchronous clock, selects path control data by comparing the designated operation time of the control data with the current time, and autonomously executes a path connection control in accordance with the selected path control data.

Abstract: A demodulation circuit receives an OFDM transmit signal containing an information carrier, an additive-information transmission carrier, and a reception-synchronization pilot signal to convert these carriers and signal into frequency-axial data. The information carrier transmits information data. The additive-information transmission carrier and the reception-synchronization pilot signal have a lower multi-valued modulation degree than the information carrier. A differential detection circuit conducts detection processing by using a detection-subject symbol of a plurality of symbols indicated at a predetermined interval in the same frequency range and a symbol ahead that detection-subject symbol by a predetermined time in either one output of the additive-information transmission carrier and the reception-synchronization pilot signal output from the demodulation circuit. A first S/N ratio generating circuit generates an S/N ratio based on a detection output provided from the differential detection circuit.

Abstract: Liquid crystalline compositions contain no functional group the synthesis of which is difficult, such as (meth)acrylate and epoxy group and comprise (A) an oxetane compound having an optically active portion, (B) a side chain liquid crystalline polymeric substance having an oxetanyl group, and (C) a photo cation generator and/or a thermal cation generator. The use of the composition can provide a cholesteric-aligned liquid crystal film with excellent alignment retention properties after being fixed in the liquid crystal state and mechanical strength, without employing any complicated step such as photo irradiation under an inert gas atmosphere.

Abstract: An ATM network for synchronously perform a path connection control at a plurality of nodes, wherein path control data are preliminarily supplied to the nodes from a network management system before a designated operation time. Each node generates a current time synchronously with a network synchronous clock, selects path control data by comparing the designated operation time of the control data with the current time, and autonomously executes a path connection control in accordance with the selected path control data.

Abstract: Liquid crystal films with excellent heat resistance and mechanical strength are provided.

Abstract: A provider code is added to a request signal transmitted to contents server SP1 from mobile unit MS by mobile communication network GSM. Border switching station CMMS adds a roaming flag to the request signal, and forwards the request signal to gateway unit GW. Gateway unit GW converts the provider code contained in the request signal into the country code by referring to the code conversion table, and transmits HTTP request to contents server CP1 after adding the country code and roaming identification information to HTTP header. When contents server CP1 receives the above-mentioned HTTP request, CP1 determines whether the requested contents are allowed to be transmitted abroad by referring to the transmission table. When transmission of the requested contents is not permitted, contents server CP1 transmits an error notification to mobile unit MS to notify that transmission is not permitted.

Abstract: The automatic gain control method with little being influenced of the unnecessary electric wave, even if strong unnecessary electric wave is near the frequency of input signal, is offered by carrying out change of the delay point level. The automatic gain control system with a scale of few circuit, having low noise property and high adjacent disturbance oppression property, is offered. When the IF AGC signal 112 is smaller than delay point level, the output agcerr of the signal level detector 614 is provided to the 1st loop filter 105. Since the IF AGC signal 112 provided to the IF AGC amplifier 608 is value responding to signal level of IF signal, output is fed back to this amplifier, and control of IF gain is performed automatically. On the other hand, when output of the 2nd loop filter 106 is “0”, output rfzero of the 2nd comparator 108 is set to 1, and “0” is provided to the 2nd loop filter 106.

Abstract: An apparatus for receiving an OFDM modulated signal includes: an A/D converter converting the received signal to a digital signal; a quadrature demodulator performing quadrature detection of the digital signal and converting the digital signal to a base-band signal; an FFT circuit transforming the base-band signal to a signal of a frequency domain by performing a fast Fourier transformation; an equalizer equalizing the signal of the frequency domain and obtaining demodulated data; an error correcting circuit performing error correction and decoding the demodulated data obtained by the equalizer; an interference detector detecting a receiving quality for each predetermined frequency band from the demodulated data; and a synchronous sequencer assigning weights to the base-band signal and the signal of the frequency domain based on the receiving quality data, and reproducing a timing synchronized signal and a clock pulse required for the demodulation.

Abstract: A demodulation circuit receives an OFDM transmit signal containing an information carrier, an additive-information transmission carrier, and a reception-synchronization pilot signal to convert these carriers and signal into frequency-axial data. The information carrier transmits information data. The additive-information transmission carrier and the reception-synchronization pilot signal have a lower multi-valued modulation degree than the information carrier. A differential detection circuit conducts detection processing by using a detection-subject symbol of a plurality of symbols indicated at a predetermined interval in the same frequency range and a symbol ahead that detection-subject symbol by a predetermined time in either one output of the additive-information transmission carrier and the reception-synchronization pilot signal output from the demodulation circuit. A first S/N ratio generating circuit generates an S/N ratio based on a detection output provided from the differential detection circuit.

Abstract: Disclosed is a novel transition metal composition of a metaracycle structure represented by the formula wherein M1 is an element of Group IVB in the Periodic Table, M2 is an element of Group IIIA in the Periodic Table, R1 and R2 each are for instance a cyclopentadienyl group, R3 and R4 each are for instance a hydrocarbon group, R5 and R6 each are a hydrogen atom and R7 and R8 indicate an indan ring formed by bonding to each other.

Abstract: Connection of speakers to an electronic apparatus fitted with a plurality of audio signal output terminals independent of the number of audio-signal output channels very easily and discernibly.

Abstract: Disclosed is a novel transition metal composition of a metallacycle structure represented by the formula ##STR1## wherein M.sup.1 is an element of Group IVB in the Periodic Table, M.sup.2 is an element of Group IIIA in the Periodic Table, R.sup.1 and R.sup.2 each are for instance a cyclopentadienyl group, R.sup.3 and R.sup.4 each are for instance a hydrocarbon group, R5 and R6 each are a hydrogen atom and R7 and R8 indicate an indan ring formed by bonding to each other.

Abstract: A phase detection circuit detects a phase of a phase detection signal output from a complex multiplication circuit. A frequency error detection circuit detects a frequency error of a phase-detected signal, with the first frequency error detection characteristic in which a first frequency domain is defined as a detection range. An average circuit converts a signal having the detected frequency error into a signal having a second frequency error detection characteristic in which a second frequency domain other than the first frequency domain is defined as a detection range. After the average circuit calculates an average of frequency error signals for each period of time, it converts an average signal into a signal having the original first frequency error detection characteristic and outputs it to an AFC loop filter.

Abstract: A catalyst component is disclosed for use in the homo- or copolymerization of olefinic hydrocarbons. The catalyst component is comprised of a first compound of the formula M.sup.1 (OR.sup.1).sub.p R.sup.2.sub.q X.sup.1.sub.4-p-q, M.sup.1 being titanium a second compound of the formula M.sup.2 (OR.sup.3).sub.m R.sup.4.sub.n X.sup.2.sub.z-m-n, with M.sup.2 being a metal of Groups Ia-IIIa or IIb of the Periodic Table, and a third compound which is an organocyclic compound having two or more conjugated double bonds. A process is also disclosed for the production of hydrocarbon polymers in which the above catalyst component is combined with a modified organoaluminum compound to form a catalyst composition capable of providing controlled molecular weight, wide distribution thereof and other desirable qualities in the polymer product.

Abstract: A process for the polymerization of olefinic hydrocarbons is carried out in the presence of a catalyst comprising a catalyst component derived from reacting a compound of the formula Me.sup.1 R.sup.1.sub.n X.sup.1.sub.4-n, a compound of the formula Me.sup.2 R.sup.2.sub.m X.sup.2.sub.z-m, an organocyclic compound having two or more conjugated double bonds and a carrier of inorganic or polymeric material, and a modified organoaluminum compound having Al--O--Al bonds, the resulting polyolefins having a relatively wide molecular weight distribution, a relatively narrow composition distribution and increased bulk density.

Abstract: A transmission system is disclosed which permits the receiving end to demodulate multi-valued modulated symbols successfully under fading conditions and reduces the amount of transmitted reference data to improve data transmission efficiency. At the transmitting end, a multiplexing section, a modulating section, and a transmitting section are provided. In transmitting an OFDM transmission frame, null symbols and reference symbols are placed in the beginning portion of the frame and QPSK symbols are placed in an information symbol data region in the frame with equal spacings in time and frequency. At the receiving end, a receiving section, a demodulation section, an equalizing section, and a demultiplexing section are provided. An error detector detects amplitude and phase errors of each carrier from the reference symbols, and a variation detector detects variations in the amplitude and phase of a received signal from the QPSK symbols.

Abstract: A process for the polymerization of olefinic hydrocarbons is carried out in the presence of a catalyst comprising a catalyst component derived from reacting a compound of the formula Me.sup.1 R.sup.1.sub.n X.sup.1.sub.4-n, a compound of the formula Me.sup.2 R.sup.2.sub.m X.sup.2.sub.z-m, an organocyclic compound having two or more conjugated double bonds and a carrier of inorganic or polymeric material, and a modified organoaluminum compound having Al--O--Al bonds, the resulting polyolefins having a relatively wide molecular weight distribution, a relatively narrow composition distribution and increased bulk density.