Abstract: Provided are shock wave generator devices and systems having means for improved control of the combustion and detonation in the combustion chamber to result in improved accuracy and longer distance of efficiency. Further provided are shock wave generators having multi-barrels.

Abstract: Techniques to improve the measurement of electromagnetic fields based on noise cancellation are disclosed. Sensors placed at the earth's surface measure electromagnetic fields emanating from within the earth, and/or perform electromagnetic telemetry. In one embodiment, signal processing techniques are applied to the acquired signals, either in real time or near real time to reduce or cancel the noise to enable the signal of interest to be measured. In another embodiment, the location of the plurality of sensors is judiciously chosen to improve the measurement of the signal of interest.

Abstract: A method and a system for soil disinfection and aeration by generating shock waves and a flow of detonation products on soil particles. The system includes a combustion chamber having an input port for supplying a predetermined air-fuel mixture to the combustion chamber. An igniter for igniting the air-fuel mixture in the combustion chamber. Means for shifting soil particles into an internal space where shock waves propagate. Rotovator which has rotary blades crumbles soil and shifts soil particles into the internal space of the rotovator. A flame arrester is attached between an air-fuel supply line and the input port. An outlet nozzle increases pressure of the detonation wave and thereby increases the pressure of shock waves and the velocity of detonation products A reflecting plate operates to reflect shock waves after the shock waves pass the soil particles Soil particles receive an additional impact during collision with the reflector plate.

Abstract: The invention generally pertains to reducing artifact noise signals present when non-invasive capacitive-type signal measurements are taken of static electric fields produced by an object of interest. According to a first preferred embodiment of the invention, a given static artifact signal is reduced by minimizing the potential difference between a ground point of sensor circuitry and the potential of the object. According to a second preferred embodiment of the invention, the change in signal due to motion of the sensor in the field produced by the object is minimized by reducing the impact of changes in coupling to the signal source.

Abstract: A method and a system for soil disinfection and aeration by generating shock waves and a flow of detonation products on soil particles. The system includes a combustion chamber having an input port for supplying a predetermined air-fuel mixture to the combustion chamber. An igniter for igniting the air-fuel mixture in the combustion chamber. Means for shifting soil particles into an internal space where shock waves propagate. Rotovator which has rotary blades crumbles soil and shifts soil particles into the internal space of the rotovator. A flame arrester is attached between an air-fuel supply line and the input port. An outlet nozzle increases pressure of the detonation wave and thereby increases the pressure of shock waves and the velocity of detonation products A reflecting plate operates to reflect shock waves after the shock waves pass the soil particles Soil particles receive an additional impact during collision with the reflector plate.

Abstract: A system for unobtrusively measuring bioelectric signals developed by an individual includes multiple sensors, one or more of which constitutes a capacitive sensor, embedded into or otherwise integrated into an object, such as a chair, bed or the like, used to support the individual. The object serves as mounting structure that holds the sensors in place. The sensors are preferably arranged in the form of an array, with particular ones of the sensors being selectable from the array for measuring the bioelectric signals which are transmitted, such as through a wireless link, for display and/or analysis purposes.

Abstract: The invention generally pertains to reducing artifact noise signals present when non-invasive capacitive-type signal measurements are taken of static electric fields produced by an object (10) of interest. According to a first preferred embodiment of the invention, a given static artifact signal is reduced by minimizing the potential difference between a ground point (G1) of sensor circuitry and the potential of the object (10). According to a second preferred embodiment of the invention, the change in signal due to motion of the sensor (30, 40; 30?, 40?; 230; 330; 430; 530; 630) in the field produced by the object (10) is minimized by reducing the impact of changes in coupling to the signal source.

Abstract: A submersible robotic pool cleaner is provided with an integral sealed rechargeable battery and an inductive charging assembly, a first portion of which is mounted in the pool cleaner housing and during the charging, receives a second separate portion that is connected by a cable to a conventional power source. The pump motor drive shaft is treated with a specialized anti-friction lubricant composition to minimize frictional energy losses where the shaft contacts the seal(s) and any shaft bearing(s), to maximize efficiency and minimize the power consumption of the pump motor assembly and permit the pool cleaner to completely traverse the surfaces to be cleaned within the fully-charged power capacity of the battery.

Abstract: A locomotive element to be incorporated in an underwater device propelled on a supporting surface along a predetermined axis of motion. The locomotive element comprises at least one resilient surface that can be rolled on the supporting surface. The resilient surface has a plurality of flow-through passages substantially perpendicular to the axis of motion.

Abstract: A system for unobtrusively measuring bioelectric signals developed by an individual includes multiple sensors, one or more of which constitutes a capacitive sensor, embedded into or otherwise integrated into an object, such as a chair, bed or the like, used to support the individual. In one preferred embodiment, multiple capacitive sensors are incorporated into a pad provided in an incubator for unobtrusively measuring bioelectric signals from a baby under supervised care. In any case, the object serves as mounting structure that holds the sensors in place. The sensors are preferably arranged in the form of an array, with particular ones of the sensors being selectable from the array for measuring the bioelectric signals which are transmitted, such as through a wireless link, for display and/or analysis purposes.

Abstract: A system for unobtrusively measuring bioelectric signals developed by an individual includes multiple sensors, one or more of which constitutes a capacitive sensor, embedded into or otherwise integrated into an object, such as a chair, bed or the like, used to support the individual. The object serves as mounting structure that holds the sensors in place. The sensors are preferably arranged in the form of an array, with particular ones of the sensors being selectable from the array for measuring the bioelectric signals which are transmitted, such as through a wireless link, for display and/or analysis purposes.

Abstract: A submersible robotic pool cleaner is provided with an integral sealed rechargeable battery and an inductive charging assembly, a first portion of which is mounted in the pool cleaner housing and during the charging, receives a second separate portion that is connected by a cable to a conventional power source. The pump motor drive shaft is treated with a specialized anti-friction lubricant composition to minimize frictional energy losses where the shaft contacts the seal(s) and any shaft bearing(s), to maximize efficiency and minimize the power consumption of the pump motor assembly and permit the pool cleaner to completely traverse the surfaces to be cleaned within the fully-charged power capacity of the battery.

Abstract: A method for cleaning the bottom of a pool uses an automated programmed pool cleaner capable of reversing movement and turning that is initially placed at an arbitrary location on the bottom of the pool and moved in a forward direction until it encounters an upright pool wall; the unit is reversed until it is a first predetermined distance from the wall, turned through a predetermined angle less than 180° and advanced until it again encounters an upright wall; these steps are repeated until the unit has encountered upright walls a predetermined number of times, after which the first predetermined distance is changed to one or more subsequent predetermined distances. All of the previous steps are repeated until all or substantially all of the pool has been cleaned. In a preferred embodiment, a rectangular pool is cleaned by setting the turning angle to 90° and the number of turns before changing the predetermined distance to seven.

Abstract: A submersible robotic pool cleaner is provided with an integral sealed rechargeable battery and an inductive charging assembly, a first portion of which is mounted in the pool cleaner housing and during the charging, receives a second separate portion that is connected by a cable to a conventional power source. The pump motor drive shaft is treated with a specialized anti-friction lubricant composition to minimize frictional energy losses where the shaft contacts the seal(s) and any shaft bearing(s), to maximize efficiency and minimize the power consumption of the pump motor assembly and permit the pool cleaner to completely traverse the surfaces to be cleaned within the fully-charged power capacity of the battery.

Abstract: A submersible robotic pool cleaner is provided with an integral sealed rechargeable battery and an inductive charging assembly, a first portion of which is mounted in the pool cleaner housing and during the charging, receives a second separate portion that is connected by a cable to a conventional power source. The pump motor drive shaft is treated with a specialized anti-friction lubricant composition to minimize frictional energy losses where the shaft contacts the seal(s) and any shaft bearing(s), to maximize efficiency and minimize the power consumption of the pump motor assembly and permit the pool cleaner to completely traverse the surfaces to be cleaned within the fully-charged power capacity of the battery.

Abstract: A method for cleaning the bottom of a pool uses an automated programmed pool cleaner capable of reversing movement and turning that is initially placed at an arbitrary location on the bottom of the pool and moved in a forward direction until it encounters an upright pool wall; the unit is reversed until it is a first predetermined distance from the wall, turned through a predetermined angle less than 180° and advanced until it again encounters an upright wall; these steps are repeated until the unit has encountered upright walls a predetermined number of times, after which the first predetermined distance is changed to one or more subsequent predetermined distances. All of the previous steps are repeated until all or substantially all of the pool has been cleaned. In a preferred embodiment, a rectangular pool is cleaned by setting the turning angle to 90° and the number of turns before changing the predetermined distance to seven.

Abstract: A two-phase shock wave generator including a combustion chamber including a first, combustion, portion having an input port and a second, detonation, portion downstream of the first portion and having an output aperture; an air-fuel supply line, operative to feed the input port with an air-fuel mixture, an igniter, associated with the air-fuel supply line, which ignites the air-fuel mixture in the supply line and initiates a burning front which propagates towards the input port and a turbulence stimulator, fixedly mounted in the combustion chamber, which enhances and controls burning of the air-fuel mixture and includes a first section, situated within the combustion portion of the combustion chamber and having a preselected first gas dynamic resistance and a second section, situated within the detonation portion of the combustion chamber and having a preselected second gas dynamic resistance, lower than the first resistance, wherein the first resistance is such that burning of the air-fuel mixture in the com