Abstract: A method of constructing self-powered air-conditioner comprises a convergent divergent nozzle where powered fan pushes air into said nozzle. While the pushed air accelerates toward the nozzle throat it becomes colder as air internal energy transformed into kinetic energy. An axial turbine installed within the nozzle throat extracts energy from the air in the nozzle and drives an electrical generator that provides electricity to the fan electric motor. Alternatively the turbine and fan are installed on common shaft, which could be the electric generator shaft. The cold air within the nozzle throat cools the nozzle throat skin, which serves as air-conditioner core. The cold nozzle skin is wrapped with coiled pipes in which liquid flows, becomes colder and this cold liquid flows away to heat exchanger where air is flowing through it and becomes colder. This cold air is then flows into spaces needed to be air-conditioned.

Abstract: A method of increasing internal combustion engine efficiency is based on using engine cooling air and exhaust gas by flowing this mixture into a convergent nozzle thus accelerating the gas mixture and eject it through nozzle exit, thus generating thrust in a desired direction which could push a land air or sea vehicle. Another option is to use the accelerated gas to drive a turbine that could add its torque to the engine or to drive electrical generator that produces electricity.

Abstract: A method and device to prevent and cure body diseases caused by infection factors such as: bacteria, virus, fungi, parasites as well as preventing fat accumulation in body blood vessels, lowering blood pressure, lowering cholesterol level in the blood and destroying body organs cancer cells is done by inhaling vapors of fresh crushed or sliced garlic or vapors of synthetic allicin.

Abstract: A method and designs of underground buildings for any purpose that do not introduce any element above ground level, thus allow agricultural use of the land by any agricultural machine or technology or using the land for recreational park.

Abstract: A method of constructing self-powered air-conditioner comprises a convergent divergent nozzle where powered fan pushes air into said nozzle. While the pushed air accelerates toward the nozzle throat it becomes colder as air internal energy transformed into kinetic energy. An axial turbine installed within the nozzle throat extracts energy from the air in the nozzle and drives an electrical generator that provides electricity to the fan electric motor. Alternatively the turbine and fan are installed on common shaft, which could be the electric generator shaft. The cold air within the nozzle throat cools the nozzle throat skin, which serves as air-conditioner core. The cold nozzle skin is wrapped with coiled pipes in which liquid flows, becomes colder and this cold liquid flows away to heat exchanger where air is flowing through it and becomes colder. This cold air is then flows into spaces needed to be air-conditioned.

Abstract: A method of converting air internal energy into useful kinetic energy is based on air flowing through substantially convergent nozzle, which accelerates the air as the cross section of the nozzle decreases thus increasing the air kinetic energy. The increment of the kinetic energy equals to the decrement of air internal energy, i.e., air temperature. Within said nozzle a turbine is placed to convert airflow kinetic energy into mechanical energy that transformed into electrical energy or transferred into a gearbox to provide driving moment. Devices uses this method could use natural wind as airflow source or artificial airflow means. Devices, which incorporate means to create airflow artificially, can be used as engines for land, sea and flying vehicle. Since air temperature drops within the nozzle, moisture condensation exists and liquid water can be accumulated for further use.

Abstract: A list of people committed to donating their own organs, in the event of their own death, to other people on the list of people. A person on the list is a committed organ donor and would receive priority over persons not on the list in receiving an organ transplant should the person on the list require an organ transplantation.

Abstract: An alert system reminds a credit card owner to collect his card after making payment. After a predetermined period of time the device will sound voices so as to attract the card owner to the absence of his card. Collecting the card and putting it back into its storage place will stop the voices, thus preventing the forgetting of the card after it was used.The device comprises a voice programmable chip connected to a tiny loudspeaker and a switch which is operated when the credit card is removed from its place thus closing an electrical circuit which triggers a recorded period of silence after which the recording produces a voice to attract the owner's attention to his credit card.The voice can be of any kind such as: human voice words, or a melody.

Abstract: A highly automated car-rental system based on a specially equipped fleet of cars for hire and one or more control stations. An authorized subscriber can enter any car of the fleet which is free for hire at any location, and use it for a desired period of time, parking it at the end of the hire period at any authorized parking place. Cars are equipped with customer, identification means, means enabling use of tile car or refusing such use, monitoring means for the main subsystems and other parameters of the car and means for conveying such information to central control. There is also provided a system for monitoring in real time car position, and if desired, for displaying such information also on a monitor in the car, thus informing control on tile position of the car at any instant of time.