Abstract: A system for harnessing water pressure fluctuation includes an accumulator element, a pneumatic actuator, and an electrical generator. The accumulator element has a reception space for receiving water, a container space for containing air, and a flexible diaphragm to separate the water from the air. The pneumatic actuator has a cylindrical enclosure element and a piston rod element movable relative to the enclosure element. Pressure fluctuation in the water causes a pressure fluctuation in the air, which in turn causes movement of the piston rod element relative to the enclosure element. The system includes a crank shaft element to convert translational movement of the piston rod element into rotational movement of the shaft element. The crank shaft element is connected to the electrical generator. Movement of the piston rod element relative to the enclosure element causes rotational movement of the shaft element, which causes the generator to generate electrical power.

Abstract: A reader for an electronic identification tag, the reader comprising: a transmitter antenna for exciting a passive electronic identification tag in proximity, the transmitter antenna comprising one or more single windings; and a receiver antenna for coupling a signal from the electronic identification tag to other parts 5 of a receiver module, the antenna comprising twin windings wound in an anti-phase manner. A method for identifying a sequence of unique identifiers, each unique identifier being associated with an animal, the method comprising: obtaining a stream of reads from animal identification tags, each animal identification tag being attached to a corresponding animal, each read comprising 10 one of a plurality of unique identifiers; identifying one or more distributions based on the number of reads for each of the plurality of unique identifiers in the stream; and determining a sequence of unique identifiers based on the distributions.

Abstract: Approaches for synchronising electronic animal identification tag readers for reading clectronic animal identification tags attached to animals. Embodiments include using a pulse from a GNSS receiver, adjusting for an error between a reference cadence signal and a local cadence signal, and using a synchronisation signal.

Abstract: Approaches for synchronising electronic animal identification tag readers for reading electronic animal identification tags attached to animals Embodiments include using a pulse from a GNSS receiver, adjusting for an error between a reference cadence signal and a local cadence signal, and using a synchronisation signal.

Abstract: Approaches for synchronising electronic animal identification tag readers for reading electronic animal identification tags attached to animals Embodiments include using a pulse from a GNSS receiver, adjusting for an error between a reference cadence signal and a local cadence signal, and using a synchronisation signal.

Abstract: A computerized compliance management system or a computerized competency/compliance management system that facilitates the planning, management, administration and taking of assessments and delivers the results of the assessment with reference to relevant competencies for members or people working in teams or groups and particularly those working in teams or groups for large organisations.

Abstract: A communication system having at least one transmitter and at least one receiver is arranged to communicate with one another over a communications channel so as to transmit information from the transmitter to the receiver. The communications channel consists of two or more carriers. The transmitter is arranged to divide information to be transmitted on channels into packets of information and to transmit different packets of information on at least two carriers. Thereby, the information transfer rate of the channel is increased. Each carrier can include sub-carriers so as to further increase the information transfer rate. Furthermore, each carrier can have more than time slot and the transmitter can select any combination available of carriers or time slots of a carrier to aid high speed information transfer.

Abstract: A method and apparatus is provided for locking a local oscillator to a reference oscillator. The reference oscillator is arranged to transmit a signal containing two reference pilot tones in a signal sideband. The apparatus samples the received signal and makes a frequency shifted copy where the shift is equal to the expected separation between the reference tones. The non-shifted and shifted signals are then combined in the frequency domain to constructively reinforce one of the reference pilot tones which is then searched for. Once the tone has been identified, a correction to the local oscillator frequency is calculated. The apparatus may be of particular use in a radio telemetry system in which it is important that the frequency of the local oscillators in the transmitters and receivers are very accurately matched to each other and where, in order to reduce interference, all the clocks used in the system are locked to a master clock.

Abstract: The predistortion circuit (200) predistorts the input signal to a non-linear signal processing device in order to linearise its output. The predistortion circuit (200) derives the predistortion by sampling the input at (210) and multiplies it with itself using mixers (multipliers) (220, 226, 230, 236, etc.) in order to generate various orders of distortion (212, 214, etc.) which are summed to provide the predistortion. Filter/time delay means (240, 242, 244) are incorporated in the paths which generate the orders of distortion in order to introduce a phase and/or amplitude variation with frequency into the distortion. The filter/time delay means can be implemented by adaptive filters in digital signal processing circuits (DSPs). The DSPs can sample the output of the signal processing device being linearised in order to obtain feedback for adapting the filter(s).

Abstract: This invention relates to a recombinant nucleic acid vector comprising a first expression cassette comprising a first promoter operably linked to a nucleic acid sequence encoding a syncytium-inducing polypeptide, wherein the first expression cassette is flanked on either side by a site recognized by a recombinase. The invention also includes a second expression cassette comprising a tissue-specific promoter operably linked to a nucleic acid sequence encoding a recombinase. The invention also includes cells and compositions including these expression cassettes and methods of reducing tumor volume by expression of these expression cassettes.

Abstract: A Cartesian loop transmitter for transmitting baseband signals is disclosed. The disclosed Cartesian loop includes a forward path having a first input for receiving the baseband signals and a second input and a feedback path having an input from the forward path. The forward path including an upconverter to upconvert the input signals to a signal to be transmitted, an attenuator having selectable attenuation and a plurality of power amplifier stages. The feedback path including a pin diode attenuator having selectable attenuation and a downconverter to downconvert the input from the forward path. The feedback path provides an error signal indicative of the non-linearity of the forward path to the second input of the forward path.

Abstract: Disclosed is a cell which expresses a surface marker associated with a professional antigen presenting cell, and a fusogenic membrane protein, where the cell may also express at its surface a tumor cell marker. Also disclosed is a fusion hybrid formed by the fusion of a tumor cell and a professional antigen presenting cell (APC) such that the resulting fusion hybrid expresses an APC marker, a tumor cell marker, and a fusogenic membrane glycoprotein. Also disclosed are compositions comprising the cells and fusion hybrids, and methods of making and using the hybrids.

Abstract: A full-duplex radio transceiver, in which cancellation of transmission signals in the receive path is achieved by sampling the transmission signals, and controllably adjusting the gain and phase of the sampled signal, before subtracting the adjusted signal from the received signals in order to minimise the component of the transmission signals appearing in the received signals. Processing is done in a DSP at or near baseband.

Abstract: An apparatus is disclosed for processing an input signal. The apparatus includes two feedback loops for generating output signal components from the input signal. Each loop contains an oscillator, which has a frequency or phase which is variable in response to a control signal, and a comparator for generating the control signal. The oscillator generates a loop output signal which forms one of the components of the output signal. The apparatus also includes a combiner for combining the loop output signals to produce the output signal. For each loop, the apparatus also produces a feedback loop operating signal, these signals being dependent on the output signal and in phase quadrature with one another. One input of the comparator in each loop receives the feedback loop operating signal, and the other input of the comparator receives a component of the input signal.

Abstract: A system for creating multiple subchannels in a single two-way radio channel and a power control system for a mobile radio transmitter are described. Each subchannel in the system is capable of carrying voice or data. Each subchannel is split into an upper and a lower band with the upper band placed in a particular frequency range above the center of the channel and the lower band is placed in a corresponding frequency range below the center of the channel. Either one or two pilot tones placed at or adjacent to the center of the channel are used to provide a reference for all of the subchannels to allow for correction of distortions when the signal is received. The system includes base station with a transmitter and receiver and a plurality of mobile units each with a transmitter and a receiver. The base station transmits a signal which is the sum of all the subchannels. The mobile unit receives the signal, separates and processes the particular subchannel for that mobile unit.

Abstract: A highly efficient linear amplifier and/or modulator and demodulator comprising first and second feedback loops is provided. Each loop processes a component of the input signal and the component signals are recombined at, for example, a summing junction 18. The feedback signals for each loop are dependent upon the output signal and are in phase quadrature. The input signal is separated into I and Q signals, which are also in phase quadrature, by a component separator 10.

Abstract: Broadband amplifiers which are intended to be linear suffer from distortion and although many techniques have been devised to overcome this problem significant improvements are required especially at frequencies above 100 MHz. An error signal is formed from the output of the amplifier 4 by comparison in a subtractor 11 with its input and the error signal is combined in a coupler 17 with the amplifier output to reduce distortion. The present invention provides automatic amplitude and phase control of the signals forming the error signal by means of components 24 and 25 in a multi-channel input and in the error signal by means of components 13 and 14. These components receive control signals from feedback networks 18' and 20' which each process two of three input signals from: couplers 34, 36 before the subtractor 11, a coupler 22 which passes the error signal and a coupler 21 after the coupler 17.

Abstract: Broadband amplifiers which are intended to be linear suffer from distortion and although many techniques have been devised to overcome this problem significant improvements are required especially at frequencies above 100 MHz. An error signal is formed from the output of an amplifier by comparison in a subtractor with its input and the error signal is combined in a coupler with the amplifier output to reduce distortion. The present invention provides automatic amplitude and phase control of the signals forming the error signal by two groups of adjustment means, one group in a multi-channel input path and one group in the error signal path. These groups receive control signals from respective feedback networks which each process two of three input signals from: couplers before the subtractor, a coupler which passes the error signal and a coupler situated after the coupler which combines the amplifier output signal and the error signal.

Abstract: A communication system which uses a transmitter and a receiver. The transmitter divides a band of interest in the frequency spectrum into upper and lower portions, and frequency translates one of these portions in order to provide a frequency notch between the portions. The receiver of the system includes a receiver processor which receives the upper and lower portions, and which restores the original frequency spectrum. The receiver processor at least partially determines the final position of the restored portion.