Abstract: A system, device, and method for evaluating dynamic range in a communication system utilizes a narrow band multiple tone test signal for emulating a wide band composite signal equivalent to the symbol rate bandwidth of a digitally modulated carrier. The multiple tone test signal is constructed such that a significant portion of the third order intermodulation distortion products fall within the channels adjacent to the test channel so that the dynamic range can be evaluated with a commercially available industry standard CATV analyzer using a standard adjacent channel power measurement technique.

Abstract: A wax bolus for ruminant animals having its melting point controlled so that the bolus is solid and stable at room temperatures but surface soft when present in the reticulo-rumen, whereby in use a beneficial substance is released from the bolus as the surface sticky bolus rubs against and repetitively attaches to and detaches itself from the stomach lining and rumen contents.

Abstract: An ultrasonic insertion flowmeter (100) is disclosed having a probe (101) which is adapted to be inserted into a duct, the probe having at least first and second ultrasonic transducer means, the probe (101) being adapted to measure the transit time difference of an ultrasonic pulse along a first path and a second path, the difference in transit time for signals along the two paths enabling the flow rate to be measured. Preferably, the probe takes measurements in both the forward and reverse directions along each path, and is adapted to rotate after initial insertion from an insertion position to a measurement position, whereafter the probe (101) may be drawn up against a wall of the duct so that alignment of the probe within the duct is readily achieved.

Abstract: A reciprocating compressor that includes an auxiliary port 38 in series with a check valve 40 to move fluid at an intermediate pressure that is between the main suction and discharge pressures. Piston 31 normally covers the auxiliary port during a portion of its stroke. In one embodiment the check valve 40 is oriented so that fluid flows into the compressor. The piston 31 uncovers the auxiliary port 38 during the early part of the down stroke to allow fluid in through the port. As the piston 31 continues to move down it covers the auxiliary port, which drops pressure in chamber 37 to allow fluid to enter through a main suction valve 34. In other embodiments the orientation of the check valve is reversed and auxiliary port acts as an auxiliary discharge port. Multiple auxiliary ports may be used in a single cylinder to achieve multiple suction and/or discharge pressures.

Abstract: An improved refrigerator that combines means for directing cooling to a fresh-food compartment and a freezer compartment with a variable-capacity compressor. During fresh-food cooling the compressor volumetric capacity is reduced to match capacity of the expansion device. The means for directing cooling may be a multiple evaporators. Another option is a single evaporator with a reversing fan and flaps that respond to the direction of air flow to direct air flow between the evaporator and each compartment. Another embodiment comprises a natural-convection evaporator with dampers for directing air flow. This last embodiment also allows automatic defrost with a natural-convection evaporator.

Abstract: A method for remote verification in which a first party at a first telephone confirms their identity to a second person at a second telephone. The fingerprint of the first person is read and compared to a stored fingerprint pattern. If the stored and sensor fingerprint patterns match, the first telephone transmits a signal to the second telephone which controls a display on the second telephone to display an image of the first person.

Abstract: A roller mechanism that uses a differential spool arrangement to convert a small linear motion into a large rolling motion. The simplest embodiment comprises two spools that are rigidly connected together and are preferably of slightly different diameters. The flexible members such as string, tape, sheet, are rolled around the spools in opposite directions and extend from the spools in opposite directions. When tension is applied to the flexible members, a torque is created which acts to turn the spools so as to roll up the flexible member that is wrapped around the spool with the smaller diameter. The result is that a small movement of the flexible members results in large movement of the spools. Various embodiments of this mechanism are ideal for use in dampers, sunshades, toys, and exercise equipment.

Abstract: Means for delivering a beneficial substance such as vitamin E to an animal, employing a pump means in the form of a device (10, 110 or 210) containing a material such as a silicate gel which swells by absorption of waer, for example from the digester in the case of a bolus, to apply pressure to an elastic container for the beneficial substance, whereby to cause the beneficial substance to be expelled through an exit orifice.

Abstract: A universal power manger capable of power converting a universal range of unregulated power inputs into a high-resolution programmable regulated (constant) output voltage or a high-resolution programmable (constant) current and of charging and/or diagnosing standard battery chemistries with a universal range of unregulated AC and DC power inputs. It includes an extremely high resolution monolithic potentiometer of at least 512 positions. Preferably, two or more extremely high resolution monolithic potentiometers are used to create a high resolution resistance chain, each having at least 512 positions and at least one tap point set according to a user selected output voltage and/or current. Each potentiometer has a resultant tap point selected by an analog switch in accordance with a user selected output that determines overall resistance in the resistance chain, the output voltage being proportional to the overall resistance.

Abstract: A method planarizes a first pole piece layer of a write head by lapping without delaminating the first pole piece layer from an underlying second read gap layer on a wafer substrate. This is accomplished by separating or dicing the first pole piece material layer in a field region about rows and columns of first pole piece layers of magnetic head assemblies so as to reduce the stress of the first pole piece material layer in the field. Accordingly, when the wafer substrate is lapped, such as by chemical mechanical polishing (CMP), a reduced stress prevents the first pole piece material layer from delaminating from the second read gap layer during the lapping operation.

Abstract: A single-phase variable-frequency power supply with two output voltages drives a single-phase AC motor that has a start circuit and main winding. For permanent split-capacitor motors, the power supply maintains a constant voltage to the start winding while it reduces the voltage to the main winding at lower frequencies. The power supply can similarly control the speed of capacitor-start and split-phase motors. For fans and pumps and other variable-torque applications, the power supply maintains approximately a constant ratio of main-winding voltage to the square of frequency. The power supply is preferably an electronic pulse-width modulated inverter.

Abstract: A bolus for supplying a biologically beneficial substance to a ruminant animal, which includes a binder constituted by a rosin matrix, preferably pine rosin, together with a ballast material, such a zinc, with the biologically beneficial substance being dispersed in the binder, so that, in use, the biologically beneficial substance is released by leaching from the non-eroding body of the bolus. A pocket may be included in the body of the rosin bolus, which pocket erodes to release an additional biologically beneficial substance.

Abstract: A method and system for maintaining the integrity of shared files when products are removed and restored. At least two programs, a first program and a second program, within the data processing system share a data structure. A profile is created for the data structure that is shared by the first and second programs. The first program is removed from the data processing system. The shared data structure altered using the profile such that the second program remains on the data processing system unaffected by the alteration of the shared data structure, wherein programs within the data processing system are efficiently maintained.

Abstract: An apparatus, software modem, and method for a data communications device, such as a modem (100, 101), to determine a symbol rate and carrier frequency, from a received probe signal, for optimizing a bit rate for data transmission and reception. The various embodiments utilizing a processor (108) or a digital signal processor (106) receive a probe signal, which also typically contains noise and other distortions, particularly envelope delay distortion. The various method and apparatus embodiments then determine a variance of the envelope delay distortion, either directly or indirectly as a correlate of attenuation distortion or as a correlate of a selected transmit pre-emphasis filter specified under the ITU V.34 protocol. The variance of the envelope delay distortion is then utilized to eliminate or disable certain symbol rates and corresponding carrier frequencies in the determination of an optimal symbol rate and carrier frequency for data transmission and reception.

Abstract: An intra-ruminal, slow release bolus for supplying a biologically beneficial substance to a ruminant animal, wherein the beneficial substance, in the form of a relatively high density particulate such as copper oxide, is incorporated in a cylindrical block of a solid, non-toxic binding substance such as salt or sugar which in use dissolves and/or disperses within at most a few hours in the ruminant stomach, leaving the beneficial substance retained in the ruminant stomach for slow release over a period of months.

Abstract: Compounds of formula I ##STR1## including pharmaceutically acceptable salts thereof in which R.sub.1 represents a phenyl C.sub.1-6 alkyl group (in which the phenyl ring is optionally substituted by one or more of the following: halo, a C.sub.1-4 alkyl group, a C.sub.1-4 alkoxy group, hydroxy or trifluoromethyl) and the alkyl chain is optionally substituted by one or more C.sub.1-2 alkyl groups; R.sub.2 represents a C.sub.2-6 alkoxycarbonyl group; and R.sub.3 represents hydrogen or halo are disclosed, which are antirheumatic agents and are useful as modulators of cytokine synthesis, immunomodulatory agents, antiinflammatory agents and anti-allergic agents. Compositions containing these compounds and processes to make these compounds are also disclosed.

Abstract: Compounds of formula I ##STR1## and pharmaceutically acceptable salts thereof in which one of A or B represents N and the other represents N or C--R.sub.3 ; R.sub.1 represents hydrogen, halo, alkyl, hydroxy, carboxyalkenyl, alkoxycarbonylalkenyl, hydroxyalkyl, carboxyalkyl, alkoxycarbonylalkyl, alkoxy, halogenated alkyl, carboxy, alkoxycarbonyl, alkanoylamino or carbamoylalkenyl; R.sub.2 represents hydrogen, alkyl, halo, alkoxy, hydroxy, alkanoyloxy, or phenoxy; R.sub.3 represents hydrogen or alkyl; R.sub.4 represents hydrogen, halo, alkoxycarbonyl, cyano, benzyloxycarbonyl, alkanoyl, benzoyl, alkyl, carboxy, alkylthio or carbamoyl; R.sub.5 represents hydrogen or alkyl; R.sub.9 represents hydrogen or alkyl; R.sub.10 represents phenyl, pyridyl or pyrimidinyl substituted by OR.sub.6 and optionally further substituted wherein R.sub.6 represents hydrogen, alkyl, alkoxycarbonyl or carbamoyl, alicyclic hydrocarbon, phenyl, cycloalkylalkyl, arylalkyl or pyridyl; or when R.sub.10 represents phenyl, OR.sub.

Abstract: The present method (200,300, 400) and device (500, 600, 700) modify phase two of the format set forth in the V.34 Recommendation of the International Telecommunication Union-Telecommunication Standardization Sector to prevent premature disconnection of calls between a call modem and an answer modem. The method and device efficiently ensure connection of the call for high speed data transmission over voiceband channels, by modification of one of: a phase preliminary to phase one and phase two. One implementation, in the answer modem, includes transmitting a signal having first information, followed by a Signal S comprising of aguard tone and a signal S1, wherein an energy of a predetermined guard tone is greater than an energy of a predetermined range of frequencies of the Signal S1; and continuing transmitting and receiving in accordance with the modified V.34 operation.

Abstract: Compounds of formula (I) including pharmaceutically acceptable salts thereof in which R.sub.1 represents a C.sub.1-6 alkyl group; R.sub.2 represents a group of the formula COOR.sub.4 in which R.sub.4 represents a C.sub.1-5 alkyl group; and R.sub.3 represents a group of formula COOR.sub.5 in which R.sub.5 represents a C.sub.1-5 alkyl group are disclosed, which are anti-rheumatic agents and are useful as modulators of cytokine synthesis, immunomodulatory agents, anti-inflammatory agents and anti-allergic agents. Compositions containing these compounds and processes to make these compounds are also disclosed.