Abstract: Which permits the application of methods for increasing the performance of a communications system on a medium made up of N conductors and a reference plane by means of injecting signals inductively in up to N combinations of the conductors, including injection in common mode, such that said injected signals can be made to be orthogonal to each other.

Abstract: The object of the present invention is carbon nanofibers mainly characterized by their high specific volume of mesopores, their high gas adsorption capacity and presenting a graphitic hollow structure. A second object of this invention is a procedure for obtaining such carbon nanofibers, which makes use of a metallic nickel catalyst and specific process furnace parameters that combined with the chemical composition of the furnace atmosphere and the fluidodynamic conditions of the gas stream inside the furnace, result in a faster growth of the carbon nanofibers and also in a higher quality of the carbon nanofibers obtained.

Abstract: Self-unloading vehicle with hydraulic system preferably of the kind to be used for loading and unloading of cereals and grains, of varied density, size and weight. It is possible to use any kind of grains adjusting its unloading thanks to a gate or blade mechanism and to a secondary container located next to the hopper itself, and it is also possible to use said secondary container as an extra storage for a harvester machine. This vehicle comprises a second container (4) situated adjacent to the first container (1), in which wall (1a) there is an unloading mouth for the product (3).

Abstract: The object of the present invention is carbon nanofibers mainly characterized by their high specific volume of mesopores, their high gas adsorption capacity and presenting a graphitic hollow structure. A second object of this invention is a procedure for obtaining such carbon nanofibers, which makes use of a metallic nickel catalyst and specific process furnace parameters that combined with the chemical composition of the furnace atmosphere and the fluidodynamic conditions of the gas stream inside the furnace, result in a faster growth of the carbon nanofibers and also in a higher quality of the carbon nanofibers obtained.

Abstract: The techniques described herein permit the application of methods for increasing the performance of a communications system on a medium made up of N conductors (21 to 2N) and a reference plane (4) by means of injecting signals (11 to 1N) inductively in up to N combinations of the conductors, including injection in common mode (11), such that said injected signals can be made to be orthogonal to each other.

Abstract: The invention relates to a device for demoulding negatives in plastic injection, which is coupled to means for ejecting a plastic injection mould and includes a guide bushing that can be attached to the die plate of the movable part of the mould, inside which extends a counter-mould which moulds the negative and is formed by a guide runner and a head that can be lowered to demould the negative. The guide bushing contains a projection which pushes against the side of the head as the counter-mould moves forward, so that the head is lowered sideways and the negative is released.

Abstract: Which permits the application of methods for increasing the performance of a communications system on a medium made up of N conductors (21 to 2N) and a reference plane (4) by means of injecting signals (11 to 1N) inductively in up to N combinations of the conductors, including injection in common mode (11), such that said injected signals can be made to be orthogonal to each other.

Abstract: Which permits the application of methods for increasing the performance of a communications system on a medium made up of N conductors (51-5N) and a reference plane (6) by means of injecting voltage signals (41-4N) in up to N combinations of the conductors, including injection in common mode, such that said injected signals can be made to be orthogonal to each other.

Abstract: Single-port signal repeater. The repeater is connected in parallel to the communication means (3), on which only one point of access (5) is needed. The repeater (4) comprises an amplifier, a hybrid circuit and a resupply and increases the scope and transmission capacity for communications made on a medium controlled without the disadvantages of the standard repeaters, which have to interrupt the line and need two access points to the channel.

Abstract: A DSX system having a plurality of jacks mounted in a chassis, the jacks including IN and OUT ports accessible from the front of the chassis and tip and ring springs corresponding to each of the IN and OUT ports. The chassis also includes IN and OUT co-axial cable connectors electrically connected to the tip and ring springs of the jacks, and MONITOR co-axial cable connectors for use in monitoring signals transmitted through the IN and OUT connectors.

Abstract: The pulse generator comprises: a delay line arranged to receive a digital input signal and to produce a plurality of delay line output signals; first and second pulse generator blocks comprising logic circuitry arranged to generate a plurality of successive first output pulses in response to said different delay line output signals; and pulse combiner circuitry arranged to combine said first output pulses to produce second output pulses. The first pulse generator block is arranged to be responsive to rising edges of said input signal, and the second pulse generator blocks is responsive to falling edges of said input signal. Thus, both rising and falling edges of said input signal are used to create pulses. The device can be used in impulse radio transmitters and receivers.

Abstract: The present invention is related to low power low noise amplifiers (LNA) including on/off switching capability, which are preferably used for impulse radio (IR) ultra-wideband (UWB) receivers. In the invention a very low power and high-gain Common-Gate Capacitive Cross Coupling Cascaded LNA is proposed, to provide an optimum gain for large ON times. The invention provides also a Common-Source Cascoded LNA for shorter received pulse widths, with the aim of implementing a fast ON/OFF switching. An input signal is applied to a first amplifying stage and the switching means are coupled to a second amplifying stage so that they do not interfere with the matching network of the first stage. The invention is also related to a method of amplifying a radio frequency signal using a plurality of low noise amplifying elements.

Abstract: It permits switching signals with a peak level equal to the source voltage by means of a transistor, the peak to peak level being double the source. It is characterized by the connection of a transistor (17) to the signal source (10) and a load (19) by means of a series of capacitors (11, 18), resistors (15, 16) and an inductor (12) that form the circuit of the invention, and by the application of two complementary control voltages (13 and 14) in order to control the off and on states of the switch circuit.

Abstract: The object of the present invention is carbon nanofibers mainly characterized by their high specific volume of mesopores, their high gas adsorption capacity and presenting a graphitic hollow structure. A second object of this invention is a procedure for obtaining such carbon nanofibers, which makes use of a metallic nickel catalyst and specific process furnace parameters that combined with the chemical composition of the furnace atmosphere and the fluidodynamic conditions of the gas stream inside the furnace, result in a faster growth of the carbon nanofibers and also in a higher quality of the carbon nanofibers obtained.

Abstract: It permits switching signals with a peak level equal to the source voltage by means of a transistor, the peak to peak level being double the source. It is characterized by the connection of a transistor (17) to the signal source (10) and a load (19) by means of a series of capacitors (11, 18), resistors (15, 16) and an inductor (12) that form the circuit of the invention, and by the application of two complementary control voltages (13 and 14) in order to control the off and on states of the switch circuit.

Abstract: The system enables bidirectional communication between a center and a plurality of users via a power line network and is characterized in that low and high speed communication can be established to provide multiple high-quality services to the users. The system comprises a performing network and frequency time-sharing and/or orthogonal frequency-division multiple access (OFDMA).

Abstract: A method for multiple access in a radiocommunication system which avoids forming a signaling multiframe with an inflexible turn of transmission. A fixed unit broadcasts over a pilot channel a predetermined number of virtual identities for signaling which form the signaling multiframe, so that when a remote unit wishes to transmit, it selects one of the virtual identities received. The time slots in the signaling multiframe are distributed among those remote units which have signaling messages to transmit to the fixed unit.

Abstract: The invention relates to an overvoltage protection circuit comprising an MOV (Metal Oxide Varistor) voltage limiting device (3) which is disposed in series with a GDT (Gas Discharge Tube) voltage limiting device (4). The invention is characterized in that a resistor (5) is disposed in parallel with the aforementioned GDT device (4), the value of said resistor being such that the voltage supported by the GDT device (4) is less than the holdover voltage thereof. In another embodiment of the invention, a second resistor (6) is disposed in parallel with the MOV device (3) and, together with the above-mentioned resistor (5), forms a resistive divider such that the voltage applied the GDT device (4) under steady-state conditions is less than the holdover voltage of the GDT.

Abstract: A preventive and therapeutic drug for a neurodegenerative disease containing, as an active ingredient, a cyclohexenone long-chain alcohol compound represented by formula (1) wherein each of R1, R2, and R3 represents a hydrogen atom or a methyl group; and X represents a C10–C28 alkylene group or alkenylene group. Since the compound of the present invention exhibits excellent neurite-extension ability and an inhibition effect on disorders caused by mutation in an SOD gene, it is useful as the active ingredient of a preventive and therapeutic drug for neurodegenerative diseases, inter alia, amyotrophic lateral sclerosis, and as the active ingredient of an inhibitory drug for disorders caused by mutation in an SOD gene.

Abstract: The invention relates to an overvoltage protection circuit comprising an MOV (Metal Oxide Varistor) voltage limiting device (3) which is disposed in series with a GDT (Gas Discharge Tube) voltage limiting device (4). The invention is characterized in that a resistor (5) is disposed in parallel with the aforementioned GDT device (4), the value of said resistor being such that the voltage supported by the GDT device (4) is less than the holdover voltage thereof. In another embodiment of the invention, a second resistor (6) is disposed in parallel with the MOV device (3) and, together with the above-mentioned resistor (5), forms a resistive divider such that the voltage applied the GDT device (4) under steady-state conditions is less than the holdover voltage of the GDT.