Abstract: One variation of a method includes: accessing a representation of a property including extant features; accessing a surveillance zone and an installation preference defined by a user for installation of a security system on the property; generating a first sensor configuration for a set of sensors of the security system that fulfills the installation preference and captures the surveillance zone; calculating a first security score for the first sensor configuration based on a first field of view of the first sensor configuration; generating a second sensor configuration for the set of sensors that fulfills the installation preference and captures the surveillance zone; calculating a second security score for the second sensor configuration based on a second field of view of the second sensor configuration; and, in response to the second security score exceeding the first security score, serving the second sensor configuration to the user via a user portal.

Abstract: A modulation scheme for use in a digital mobile radio communications system. The modulation scheme uses a four slot time-division multiple access scheme with 12.5 kHz channels. Each 12.5 kHz channel contains plural sub-carriers and each sub-carrier is modulated with a modulation scheme that encodes at least 4 bits per symbol. The modulation scheme can be used in a standalone mobile radio communications system, or in a hybrid mobile radio communications system that also uses standard TETRA modulation schemes.

Abstract: A scheme for indicating the presence of stealing or other information in a digital mobile radio communications system. A sequence of pilot symbols and/or synchronization symbols that can be distinguished from a normal sequence of pilot symbols and/or synchronization symbols is included in a transmission to indicate the presence of stealing. A receiver determines whether a received transmission includes the stealing sequence or the normal sequence and decodes the transmission accordingly.

Abstract: A scheme for indicating the presence of stealing or other information in a digital mobile radio communications system. A sequence of pilot symbols and/or synchronisation symbols that can be distinguished from a normal sequence of pilot symbols and/or synchronisation symbols is included in a transmission to indicate the presence of stealing. A receiver determines whether a received transmission includes the stealing sequence or the normal sequence and decodes the transmission accordingly.

Abstract: A modulation scheme for use in a digital mobile radio communications system. The modulation scheme uses a four slot time-division multiple access scheme with 12.5 kHz channels. Each 12.5 kHz channel contains plural sub-carriers and each sub-carrier is modulated with a modulation scheme that encodes at least 4 bits per symbol. The modulation scheme can be used in a standalone mobile radio communications system, or in a hybrid mobile radio communications system that also uses standard TETRA modulation schemes.

Abstract: A portable kaleidoscope device for viewing kaleidoscopic images of at least one imaging object is provided with a viewing assembly for viewing the imaging object, a fill chamber assembly, a main body connecting said viewing assembly to said fill chamber assembly, and illumination source or black light-generating illumination source disposed in the device for illuminating the imaging object with light of a selected wavelength.

Abstract: A levitated finned ball device includes a ball made of a lightweight material and a base that generates laminar air flow to levitate the ball in mid-air. The ball has at least one generally semi-circular shaped fin extending therefrom. When the laminar air flow strikes the fin, it imparts motion to the ball.

Abstract: A portable kaleidoscope device for viewing kaleidoscopic images of at least one imaging object is provided with a viewing assembly for viewing the imaging object, a fill chamber assembly, a main body connecting said viewing assembly to said fill chamber assembly, and illumination source or black light-generating illumination source disposed in the device for illuminating the imaging object with light of a selected wavelength.

Abstract: A black light display device is provided which utilizes a black light source in combination with fluorescent/phosphorescent display elements which can be thread, strings, monofilaments, disks or sculptured material. The display elements are formed about a spindle which is secure by fixed in a housing which houses the black light source and the fluorescent/phosphorescent elements. One form of housing comprises selectively removable transparent barrier which is transparent to the visible light radiating from the fluorescent display elements but opaque to the ultraviolet light radiating from the black light illumination source.