Abstract: A device for sensing seismic and/or acoustic vibrations, has a body of a particulate material composed of a plurality of individual particles, and a system for determining changes in electrical conductivity of the particulate material caused by seismic and acoustic vibrations.

Abstract: A device for enhancing growth of plants and vegetables has a body adapted to placed on a surface accessible for sunlight, the body having photo-transforming qualities which convert UV light for plants and vegetables into growth enhancing light so as to promote photosynthesis and therefore to enhance growth of plants and vegetables, and means for delivering the growth-enhancing light to plants or vegetables.

Abstract: A system for detecting of an intruder has a plurality of groups of sensors connected in parallel with one another, the sensors being selected from the group consisting of seismic sensors, acoustic sensors and both, a plurality of individual processing units each connected with a respective one of the groups of sensors, the individual processing units being connected in parallel with one another, a central processing unit connected with all the parallel-connected processing units so that each of the individual processing units can obtain information about a presence of an intruder near any of the groups of sensors, and means for obtaining a visual image of the intruder near any of the groups of sensors and transmitting the image to the central processing unit.

Abstract: A device for sensing seismic and/or acoustic vibrations, has a body of a particulate material composed of a plurality of individual particles, and a system for determining changes in electrical conductivity of the particulate material caused by seismic and acoustic vibrations.

Abstract: A tornado detection system has a plurality of sensors each having a body of a particulate material composed of a plurality of individual particles; and means for determining changes in electrical conductivity of the particulate material caused by seismic and acoustic vibrations; and means for connecting the sensors with one another so as to form a zone sensitive to movement of a tornado.

Abstract: A device for sensing seismic and/or acoustic vibrations, has a body of a particulate material composed of a plurality of individual particles, and a system for determining changes in electrical conductivity of the particulate material caused by seismic and acoustic vibrations.

Abstract: A device for enhancing photosynthesis has a membrane which is formed so that the membrane covers plants or vegetables, the membrane having photo-transforming qualities which convert UV light for plants and vegetables into growth-enhancing light that promotes photosynthesis.

Abstract: A method and apparatus for controlling light and temperature necessary for the optimum growth of vegetables and plants for backyard gardeners. This is achieved by using a photo-transforming membrane supported by a light-weight, luminescent, portable and easily-assembled without tools frame. The components of the apparatus can be efficiently and compactly packaged, suitable for mass distribution. The membrane has photo-transforming qualities which transform UV-light into a bandwith of light that promotes photosynthesis. This, in turn, enhances crop growth and increases internal ambient temperature.

Abstract: A mechanically strong doped polymer sheeting--high-density polyethylene (HDPE) film--that provides excellent durability, high-maintenance and photo-transforming properties for covering hotbeds and greenhouses is comprised of: a light-transforming additive based on yttrium-europium oxysulfide; a light-stabilizing agent based on polyaminosuccinate; and a polymer resin used to form the high-density polyethylene 6-mil film. A preferred embodiment includes following composition and ratios: yttrium-europium oxysulfide content is 0.05-0.5% by weight; polyaminosuccinate content is 0.1-1% by weight; the ratio of yttrium-europium oxysulfide to polyaminosuccinate ranges from 0.5:1 to 1:2; and high-density polyethylene content is over 98.5% by weight according to above percentage of the additives. The doped polymer sheeting, HDPE film, for instance, can be fabricated efficiently and compactly packaged making it suitable for mass distribution.