Abstract: A method is provided for treating materials, especially organic materials, with pulsed electrical fields, wherein the method includes the step of applying an agile pulse sequence having at least three pulses to a material, wherein the agile pulse sequence has one, two, or three of the following characteristics: (1) at least two of the at least three pulses differ from each other in pulse amplitude; (2) at least two of the at least three pulses differ from each other in pulse width; and (3) a first pulse interval for a first set of two of the at least three pulses is different from a second pulse interval for a second set of two of the at least three pulses. When biological cells are treated to form pores in an electroporation procedure, the induced pores are sustained for a relatively long period of time, and viability of the biological cells is maintained.

Abstract: A system and method for communicating information signals using spread spectrum communication techniques. PN sequences are constructed that provide orthogonality between the users so that mutual interference will be reduced, allowing higher capacity and better link performance. With orthogonal PN codes, the cross-correlation is zero over a predetermined time interval, resulting in no interference between the orthogonal codes, provided only that the code time frames are time aligned with each other. In an exemplary embodiment, signals are communicated between a cell-site and mobile units using direct sequence spread spectrum communication signals. In the cell-to-mobile link, pilot, sync, paging and voice channels are defined. Information communicated on the cell-to-mobile link channels are, in general, encoded, interleaved, bi-phase shift key (BPSK) modulated with orthogonal covering of each BPSK symbol along with quadrature phase shift key (QPSK) spreading of the covered symbols.

Abstract: An aliphatic spray polyurea elastomer is disclosed. The elastomer comprises an (A) and (B) component. The (A) component includes an aliphatic isocyanate. The (B) component includes an amine terminated polyoxyalkylene polyol and an amine terminated aliphatic chain extender.

Abstract: An aliphatic spray polyurea elastomer is disclosed. The elastomer comprises an (A) and (B) component. The (A) component includes an aliphatic isocyanate. The (B) component includes an amine terminated polyoxyalkylene polyol and an amine terminated aliphatic chain extender.

Abstract: A mower attachment for selectable side delivery of cut forage crops using a conveyor belt system incorporated in the attachment that is mounted behind the mower in a straddle fashion with at least one shock absorber interconnecting the attachment with the mower to limit vertical separation when traveling over rough ground. The attachment also including a hinged baffle to direct cuttings to the conveyor belt. With the baffle in an open position a portion of the cuttings fall on the conveyor belt and the remainder fall on the ground. Closing the baffle against the conveyor belt causes all cuttings to fall on the baffle.

Abstract: Apparatus for an automatic bar feeder is given which provides fluid to the space between the barstock and guide tube having a pump integral to the piston pusher to control pressure on the barstock being fed to the machine tool.

Abstract: A pressure stabilizing apparatus is given which is capable of storing and supplying the volume of hydraulic fluid needed for rapid advances as well as accepting displaced hydraulic fluid required for rapid retractions in a barfeed apparatus. This pressure stabilizing apparatus or surge-accumulator device demonstrates the advantage of eliminating excessive force, which could damage the headstock, cause increased vibration and noise, and also prevents loss of contact with the bar end, all of which limit the speed of the spindle, and reduce productivity.

Abstract: A cardiac valve implanted within the heart is given where a expansible valve maintained in a collapsed form by cold temperature is percutaneously inserted along a releasable guide wire in a cooled sheath and when positioned is expanded by withdrawing the cold temperature.

Abstract: 6-substitutted acyclopyrimidine nucleoside derivatives represented by the following general formula I: ##STR1## wherein R.sup.1 represents a hydrogen or halogen atom or a group of alkyl, alkenyl, alkynyl, alkylcarbonyl, arylcarbonyl, arylcarbonylalkyl, arylthio or aralkyl; R.sup.2 represents a group of arylthio, alkylthio, cycloalkylthio, aryl sulfoxide, alkyl sulfoxide, cycloalkyl sulfoxide, alkenyl, alkynyl, aralkyl, arylcarbonyl, arylcarbonylalkyl or aryloxy; R.sup.3 represents a hydroxyalkyl group of which alkyl portion may contain an oxygen atom; X represents an oxygen or sulfur atom or amino group; Y represents an oxygen or sulfur atom; and A represents .dbd.N-- or --NH-- or pharmaceutically acceptable salts thereof, processes for their preparation and antiviral agents containing them as active ingredients.

Abstract: A protective overcoating is disclosed for a magnetic alloy thin-film recording disc that includes a magnetic alloy film formed on a disc-shaped substrate or coated substrate. The protective overcoating is formed by first sputtering onto the magnetic medium an interfacial layer of titanium, and then sputtering onto the titanium a layer of carbon. The sputtered carbon provides wear-resisting lubricity, while the titanium interface promotes the adhesion of the sputtered carbon to the magnetic medium of the recording disc.

Abstract: Wind driven apparatus for the production of power at a ground location includes an aerodynamic lift generating vehicle capable of maintaining a stable airborne orientation, a tether linking the vehicle to a ground location, mechanical power generating equipment carried by the vehicle and responsive to relative motion between the air and the vehicle, apparatus for converting the generated power to reciprocating motion and structure for transmitting the reciprocating motion along the tether to the ground.

Abstract: A load-lifting and centering device is given whereby a load device in the form of a rack supported by legs is capable of self-centering during a lifting procedure whereby the same is centered laterally, longitudinally, and in a level position, and finally locking into place so that the portable rack and load are firmly connected to a vehicle while in transit.

Abstract: An electrophotographic developer composition is provided with a lubricating component comprising particulate, cross-linked polyvinylidene fluoride. The polyvinylidene fluoride is cross-linked by exposure to a small dosage of high energy radiation.

Abstract: A developer composition comprising (1) electroscopic toner particles (2) a friction-reducing material of a hardness less than said toner and having greater fricton-reducing characteristics than said toner material, and (3) a finely divided nonsmearable abrasive material of a hardness greater than said friction-reducing and toner materials. An imaging and development process utilizing the above-identified composition including the step of maintaining the buildup of friction-reducing material on an imaging surface in the submicron range without completely removing or preventing said buildup, by the combined action of a cleaning force wiping at least any residual developed image from at least a portion of said imaging surface.