Abstract: A disclosed system quantifies the power distribution of a wireless signal within a constrained environment using non-sequential ray tracing. For each ray, one or more ray-reflecting surface is prescreened to identify collision-eligible surfaces and identify a collision surface from the collision-eligible surfaces, wherein the collision surface is the first ray-reflecting surface that a ray collides with. A power distribution component, indicating the position and power of a ray at a particular elevation within the environment, is added to a cumulative power distribution. If a reflected ray corresponding to each collision is calculated and satisfies ray eligibility conditions, a collision surface may be determined for the reflected ray. Collision surfaces may be identified by evaluating a target function for a number of ray positions, where the target function evaluates to zero when displacement between the ray and the ray-reflecting surface is zero.

Abstract: A disclosed system quantifies the power distribution of a wireless signal within a constrained environment using non-sequential ray tracing. For each ray, one or more ray-reflecting surface is prescreened to identify collision-eligible surfaces and identify a collision surface from the collision-eligible surfaces, wherein the collision surface is the first ray-reflecting surface that a ray collides with. A power distribution component, indicating the position and power of a ray at a particular elevation within the environment, is added to a cumulative power distribution. If a reflected ray corresponding to each collision is calculated and satisfies ray eligibility conditions, a collision surface may be determined for the reflected ray. Collision surfaces may be identified by evaluating a target function for a number of ray positions, where the target function evaluates to zero when displacement between the ray and the ray-reflecting surface is zero.

Abstract: Wireless communication of information from an access control device to a mobile communications device is disclosed. The mobile communications device is capable of communicating with at least two transmitters. The at least two transmitters include i) a first transmitter located at a first access controlled door that transmits first BLE beacons; and a ii) second transmitter located at a second access controlled door that transmits second BLE beacons. The mobile communications device includes a Bluetooth communication module that is configured to receive a plurality of BLE beacons, including the first BLE beacons and the second BLE beacons, from the at least two transmitters at different locations on a same floor within a premises.

Abstract: A mid-infrared cascading fiber amplifier device having a source configured to generate a first electromagnetic wave output at a first frequency, a fiber coupled to the source and a pump coupled to the fiber and configured to generate a second electromagnetic wave output at a second frequency, wherein the second frequency is higher than the first frequency and causes the fiber to undergo two or more transitions in response to stimulation by the first electromagnetic wave output at the first frequency, wherein the first transition generates the first electromagnetic wave output approximately at the first frequency and the second transition generates the first electromagnetic wave output approximately at the first frequency.

Abstract: Wireless communication of information from an access control device to a mobile communications device is disclosed. The mobile communications device is capable of communicating with at least two transmitters. The at least two transmitters include i) a first transmitter located at a first access controlled door that transmits first BLE beacons; and a ii) second transmitter located at a second access controlled door that transmits second BLE beacons. The mobile communications device includes a Bluetooth communication module that is configured to receive a plurality of BLE beacons, including the first BLE beacons and the second BLE beacons, from the at least two transmitters at different locations on a same floor within a premises.

Abstract: Wireless communication of information from an access control device to a mobile communications device is disclosed. The mobile communications device is capable of communicating with at least two transmitters. The at least two transmitters include i) a first transmitter located at a first access controlled door that transmits first BLE beacons; and a ii) second transmitter located at a second access controlled door that transmits second BLE beacons. The mobile communications device includes a Bluetooth communication module that is configured to receive a plurality of BLE beacons, including the first BLE beacons and the second BLE beacons, from the at least two transmitters at different locations on a same floor within a premises.

Abstract: A mid-infrared cascading fiber amplifier device having a source configured to generate a first electromagnetic wave output at a first frequency, a fiber coupled to the source and a pump coupled to the fiber and configured to generate a second electromagnetic wave output at a second frequency, wherein the second frequency is higher than the first frequency and causes the fiber to undergo two or more transitions in response to stimulation by the first electromagnetic wave output at the first frequency, wherein the first transition generates the first electromagnetic wave output approximately at the first frequency and the second transition generates the first electromagnetic wave output approximately at the first frequency.

Abstract: Wireless communication of information from an access control device to a mobile communications device is disclosed. The mobile communications device is capable of communicating with at least two transmitters. The at least two transmitters include i) a first transmitter located at a first access controlled door that transmits first BLE beacons; and a ii) second transmitter located at a second access controlled door that transmits second BLE beacons. The mobile communications device includes a Bluetooth communication module that is configured to receive a plurality of BLE beacons, including the first BLE beacons and the second BLE beacons, from the at least two transmitters at different locations on a same floor within a premises.

Abstract: Several embodiment of a telephone device having a cradle and a headset assembly are disclosed. Each headset has spring biased members to firmly hold the headset on a person's head which device frees the hands when listening thereto or talking therein. In one embodiment, the headset has first and second resilient, spring-biased retractable bars having respective outer ends fixedly connected to respective first and second ear speakers. Other embodiments use bar shaped or square shaped elements to hold the speakers and mechanical arrangements to extend or retract the bar shaped or square shaped elements. The headset embodiments are disclosed for use with conventional telephone systems that have telephone lines or cords to cradles or for use with remote or cordless systems that can be used for cellular or non-cellular telephone systems.