Abstract: A seismic sensor, has a case, a pre-charged, non-conductive membrane located between two plates that form a capacitor and accommodated inside the case, with one of the plates being immovable relative to the case and the other of the plates being movable relative to the one plate under the action of seismic activity of a medium in which the sensor is located, so that the capacitor produces an electrical signal responsive to the seismic activity, and a mass increasing element associated with the movable plate so as to increase mass of the movable plate and therefore enhance oscillations of the movable plate under the action of the seismic activity.

Abstract: A seismic sensor, comprising a case, a pre-charged, non-conductive membrane located between two plates that form a capacitor and accommodated inside the case, with one of the plates being immovable relative to the case and the other of the plates being movable relative to the one plate under the action of seismic activity so that the capacitor produces an electrical signal responsive to the seismic activity of a medium in which the sensor is located, and a mass increasing element associated with the movable plate so as to increase mass of the movable plate and therefore to enhance oscillations of the movable plate under the action of the seismic activity, the mass increasing element being formed as a further case which is connected to the movable plate and is located in condition of equilibrium in an inoperative position of the sensor.

Abstract: A system for protection from intruders has at least two groups of sensors arranged so that the sensors in each of the groups are spaced from one another in a predetermined direction, while the groups of the sensors are spaced from one another in another direction which is substantially transverse to the one direction, the sensors being formed as seismic sensors, a single central control and processing unit arranged to receive unprocessed signals from the seismic sensors, at least one external alarm generating unit including a loudspeaker and a search light, at least one television camera associated with the alarm generating unit, and at least one phone line associated with the control and processing unit, the sensors, the alarm generating unit and the central control and processing unit being connected so that when an intruder is detected by at least one of the sensors of one of the groups of sensors, the alarm generating unit generates a loud voice warning by the loud speaker and generates a light by the sea

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 seismic sensor, comprising a case, a pre-charged, non-conductive membrane located between two plates that form a capacitor and accommodated inside the case, with one of the plates being immovable relative to the case and the other of the plates being movable relative to the one plate under the action of seismic activity so that the capacitor produces an electrical signal responsive to the seismic activity of a medium in which the sensor is located, and a mass increasing element associated with the movable plate so as to increase mass of the movable plate and therefore to enhance oscillations of the movable plate under the action of the seismic activity, the mass increasing element being formed as a further case which is connected to the movable plate and is located in condition of equilibrium in an inoperative position of the sensor.

Abstract: A seismic sensor, has a case, a pre-charged, non-conductive membrane located between two plates that form a capacitor and accommodated inside the case, with one of the plates being immovable relative to the case and the other of the plates being movable relative to the one plate under the action of seismic activity of a medium in which the sensor is located, so that the capacitor produces an electrical signal responsive to the seismic activity, and a mass increasing element associated with the movable plate so as to increase mass of the movable plate and therefore enhance oscillations of the movable plate under the action of the seismic activity.

Abstract: A method of calibration of magnification of a microscope with the use of a diffraction grating has the steps of determining a mean period of a diffraction grating by irradiating the diffraction grating with an electromagnetic radiation having a known wavelength and analyzing a resulting diffraction pattern, determining a scatter of individual values of a period of the diffraction grating by multiple measurements of periods of the diffraction grating by a microscope in pixels in one area in a microscope field of view, and calculating a mean value of the period and the scatter based on the measurements, determining a sufficient number of measurements of the period for providing an accepted statistic error of a magnification of the microscope, performing measurements corresponding to the determined acceptable number of measurements, of individual values of the period in pixels in a plurality of portions of the diffraction grating, calculating a general mean value of the period in pixels based on the immediately

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 method of calibrating magnification of optical devices includes providing a mask with a predetermined pattern, projecting radiation through the mask so as to form a pattern image, and comparing a pattern of the image with a pattern of the mask to determine deviations of the image of the projected image from the image of the mask.

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 method of diagnosing a parameter of a scanning electron microscope such as magnification, linearity and stability, includes loading a reference material into a microscope, setting a permissible limit of a value of the parameters, inputting a pitch of the reference material, inputting a magnification of the microscope, acquiring a set of digital images on the reference material, analyzing the digital image line after line with determination of a pitch of features of the image in each line, in mutually orthogonal directions, checking if all lines of the digital image has been analyzed, determining a mean value of the pitch of the features in each orthogonal direction, comparing the obtained value of the pitch of the image with a known value of the pitch of the reference material to determine a ratio indicative of a modification, and determining a precision of the measurements of the pitch by statistical analysis of the pitch measurements.

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 method of automatically correcting magnification and/or non linearity of scanning electron microscope has the steps of loading a reference material in the microscope, inputting a pitch of the reference material and a nominal magnification of the microscope, obtaining an image of the reference material, determining a pitch and/or a linearity of the image of the reference material, comparing the pitch of the image with the inputted pitch of the reference material to obtain a ratio indicative of the magnification and/or comparing the magnification in different locations across an image field indicative of the linearity, comparing the thusly determined magnification with the nominal magnification, and if an error of magnification exceeds a predetermined value, adjusting the scanning electron microscope.

Abstract: A system for detecting of an intruder has a plurality of sensors distributed over an area of a corresponding area; a process or arranged to process signals obtained from said sensors as a result of activity of the intruder; and the sensors with the processor, the connections are formed so that the sensors are connected parallel with one another to the processor.

Abstract: A system for detecting a walking intruder has at least one sensor which senses the presence of intruders, and a processing unit connected with the sensor and operative for determining a plurality of parameters, analyzing the parameters, and making a decision from the determined value about a type of intruder present.

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.