Abstract: A recoil security apparatus comprises a body extending along a body axis and comprising an inner surface. The inner surface defines a plurality of surface features and surrounds a shaft extending along the body axis. A first holder is supported by the body and a second holder supported by the body. A securing member comprises an outer surface and is configured to traverse the shaft and engage the plurality of surface features. The securing member connects to the first holder at a first end and to the second holder at a second end. Rotation of the securing member in a first direction causes one of the first holder and the second holder to move in a direction away from the body. Alternatively, rotation of the securing member in a second direction causes one of the first holder and the second holder to move in a direction toward the body.

Abstract: A recoil security apparatus comprises a body extending along a body axis and comprising an inner surface. The inner surface defines a plurality of surface features and surrounds a shaft extending along the body axis. A first holder is supported by the body and a second holder supported by the body. A securing member comprises an outer surface and is configured to traverse the shaft and engage the plurality of surface features. The securing member connects to the first holder at a first end and to the second holder at a second end. Rotation of the securing member in a first direction causes one of the first holder and the second holder to move in a direction away from the body. Alternatively, rotation of the securing member in a second direction causes one of the first holder and the second holder to move in a direction toward the body.

Abstract: A recoil security apparatus comprises a body extending along a body axis and comprising an inner surface. The inner surface defines a plurality of surface features and surrounds a shaft extending along the body axis. A first holder is supported by the body and a second holder supported by the body. A securing member comprises an outer surface and is configured to traverse the shaft and engage the plurality of surface features. The securing member connects to the first holder at a first end and to the second holder at a second end. Rotation of the securing member in a first direction causes one of the first holder and the second holder to move in a direction away from the body. Alternatively, rotation of the securing member in a second direction causes one of the first holder and the second holder to move in a direction toward the body.

Abstract: The methods for determining the probability of detection of a thermally camouflaged target at various ranges by the sensor includes determining an “inherent” temperature difference, ?TRSS, between the target and its immediate surroundings. Once ?TRSS is determined, a scaled N50 cycle criterion, or the number of resolvable cycles needed by the sensor for a fifty percent probability of detection, is determined according to the relationship N50=A/(?TRSS)B+C, where A, B and C are constants that are predetermined according to whether the immediate surroundings are of a woodland or a littoral nature. The scaled N50 cycle criterion is then used in an empirical Target Transfer Probability Function (TTPF) defined by P=(N/N50)E/(1+(N/N50)E), where E=2.7+0.7(N/N50), in order to determine the probability of detection of the thermally camouflaged target.