Abstract: A smart mask including sensors, an RFID tag, a microcontroller and a communications device communicates by a near field communications protocol with a WiFi access point, which sends sensor readings, a location, and an identification to a cloud based smart mask monitoring application, which registers the smart mask, and stores the identification. The sensor readings are analyzed by the cloud based smart mask monitoring application to determine when a person wearing the smart mask may be contaminated by COVID-19. A neighborhood analysis is conducted to identify other smart mask wearers who may have come in contact with the contaminated person, and the other smart mask wearers are notified. Instructions are sent to the microcontroller to activate LEDs which indicate whether the health status of the person is normal, is possibly infected or is contaminated. A smart phone including a native smart mask monitoring application may display the health status.

Abstract: A method for evaluating performance of a sensor network. The method includes selecting, a sensor distribution pattern for a geographical region and determining a location for a base station. A plurality of sensor clusters are generated, each sensor cluster being formed by one of a first and second grouping mechanism. Further, the method allocates, for each sensor a time-slot within a time-frame to transmit a data packet from the sensor to the base station, and evaluates the performance of the first grouping mechanism and the second grouping mechanism for the selected sensor distribution pattern and base station location, by computing at least a ratio of delivered data packets to the base station to a total energy consumption, and a first delay and a second delay incurred by each data packet.

Abstract: A method for evaluating performance of a sensor network. The method includes selecting, a sensor distribution pattern for a geographical region and determining a location for a base station. A plurality of sensor clusters are generated, each sensor cluster being formed by one of a first and second grouping mechanism. Further, the method allocates, for each sensor a time-slot within a time-frame to transmit a data packet from the sensor to the base station, and evaluates the performance of the first grouping mechanism and the second grouping mechanism for the selected sensor distribution pattern and base station location, by computing at least a ratio of delivered data packets to the base station to a total energy consumption, and a first delay and a second delay incurred by each data packet.

Abstract: The system with branched optical fibers provides diagnostics and measurement of static and/or dynamic parameters in structures and structural elements. The system includes a structural material or element having a branched optical fiber embedded therein. The branched optical fiber includes a primary optical fiber segment and at least one secondary optical fiber segment branching therefrom. One or more fiber Bragg grating sensors are arranged on, and are in optical communication with, the primary optical fiber segment and the at least one secondary optical fiber segment. A signal analyzer receives signals generated by the fiber Bragg grating sensors representative of a magnitude of the physical parameter of the structural element.

Abstract: The system with branched optical fibers provides diagnostics and measurement of static and/or dynamic parameters in structures and structural elements. The system includes a structural material or element having a branched optical fiber embedded therein. The branched optical fiber includes a primary optical fiber segment and at least one secondary optical fiber segment branching therefrom. One or more fiber Bragg grating sensors are arranged on, and are in optical communication with, the primary optical fiber segment and the at least one secondary optical fiber segment. A signal analyzer receives signals generated by the fiber Bragg grating sensors representative of a magnitude of the physical parameter of the structural element.

Abstract: A method for evaluating performance of a sensor network. The method includes selecting, a sensor distribution pattern for a geographical region and determining a location for a base station. A plurality of sensor clusters are generated, each sensor cluster being formed by one of a first and second grouping mechanism. Further, the method allocates, for each sensor a time-slot within a time-frame to transmit a data packet from the sensor to the base station, and evaluates the performance of the first grouping mechanism and the second grouping mechanism for the selected sensor distribution pattern and base station location, by computing at least a ratio of delivered data packets to the base station to a total energy consumption, and a first delay and a second delay incurred by each data packet.

Abstract: The system with branched optical fibers provides diagnostics and measurement of static and/or dynamic parameters in structures and structural elements. The system includes a structural material or element having a branched optical fiber embedded therein. The branched optical fiber includes a primary optical fiber segment and at least one secondary optical fiber segment branching therefrom. One or more fiber Bragg grating sensors are arranged on, and are in optical communication with, the primary optical fiber segment and the at least one secondary optical fiber segment. A signal analyzer receives signals generated by the fiber Bragg grating sensors representative of a magnitude of the physical parameter of the structural element.

Abstract: The system with branched optical fibers provides diagnostics and measurement of static and/or dynamic parameters in structures and structural elements. The system includes a structural material or element having a branched optical fiber embedded therein. The branched optical fiber includes a primary optical fiber segment and at least one secondary optical fiber segment branching therefrom. One or more fiber Bragg grating sensors are arranged on, and are in optical communication with, the primary optical fiber segment and the at least one secondary optical fiber segment. A signal analyzer receives signals generated by the fiber Bragg grating sensors representative of a magnitude of the physical parameter of the structural element.

Abstract: A method for evaluating performance of a sensor network. The method includes selecting, a sensor distribution pattern for a geographical region and determining a location for a base station. A plurality of sensor clusters are generated, each sensor cluster being formed by one of a first and second grouping mechanism. Further, the method allocates, for each sensor a time-slot within a time-frame to transmit a data packet from the sensor to the base station, and evaluates the performance of the first grouping mechanism and the second grouping mechanism for the selected sensor distribution pattern and base station location, by computing at least a ratio of delivered data packets to the base station to a total energy consumption, and a first delay and a second delay incurred by each data packet.

Abstract: The system with branched optical fibers provides diagnostics and measurement of static and/or dynamic parameters in structures and structural elements. The system includes a structural material or element having a branched optical fiber embedded therein. The branched optical fiber includes a primary optical fiber segment and at least one secondary optical fiber segment branching therefrom. One or more fiber Bragg grating sensors are arranged on, and are in optical communication with, the primary optical fiber segment and the at least one secondary optical fiber segment. A signal analyzer receives signals generated by the fiber Bragg grating sensors representative of a magnitude of the physical parameter of the structural element.

Abstract: A method for evaluating performance of a sensor network. The method includes selecting, a sensor distribution pattern for a geographical region and determining a location for a base station. A plurality of sensor clusters are generated, each sensor cluster being formed by one of a first and second grouping mechanism. Further, the method allocates, for each sensor a time-slot within a time-frame to transmit a data packet from the sensor to the base station, and evaluates the performance of the first grouping mechanism and the second grouping mechanism for the selected sensor distribution pattern and base station location, by computing at least a ratio of delivered data packets to the base station to a total energy consumption, and a first delay and a second delay incurred by each data packet.

Abstract: The system with branched optical fibers provides diagnostics and measurement of static and/or dynamic parameters in structures and structural elements. The system includes a structural material or element having a branched optical fiber embedded therein. The branched optical fiber includes a primary optical fiber segment and at least one secondary optical fiber segment branching therefrom. One or more fiber Bragg grating sensors are arranged on, and are in optical communication with, the primary optical fiber segment and the at least one secondary optical fiber segment. A signal analyzer receives signals generated by the fiber Bragg grating sensors representative of a magnitude of the physical parameter of the structural element.

Abstract: The desktop milling machine with an ovate-shaped bridge is a desktop milling machine of the computer numerical control (CNC) type having a portion of the bridge or frame structure configured to alleviate bridge deflections and deformations that are caused during the high-speed milling processes. Preferably, the bridge has an ovate arch, or has a rear face having an ovate contour.

Abstract: Wireless communication system for underground pipeline inspection. The system includes a plurality of sensor nodes moved by robots within the pipeline and each sensor node includes a radio transceiver. A plurality of spaced apart, above ground relay nodes are deployed along the pipeline, each relay node including a radio transceiver for communication with the sensor nodes. A remote monitoring center is provided in communication with the relay nodes, whereby a leak detected by a sensor node is communicated to the remote monitoring center. Each sensor node may further include a microcontroller, an accelerometer and a timer.

Abstract: A method for evaluating performance of a sensor network. The method includes selecting, a sensor distribution pattern for a geographical region and determining a location for a base station. A plurality of sensor clusters are generated, each sensor cluster being formed by one of a first and second grouping mechanism. Further, the method allocates, for each sensor a time-slot within a time-frame to transmit a data packet from the sensor to the base station, and evaluates the performance of the first grouping mechanism and the second grouping mechanism for the selected sensor distribution pattern and base station location, by computing at least a ratio of delivered data packets to the base station to a total energy consumption, and a first delay and a second delay incurred by each data packet.

Abstract: The desktop milling machine with an ovate-shaped bridge is a desktop milling machine of the computer numerical control (CNC) type having a portion of the bridge or frame structure configured to alleviate bridge deflections and deformations that are caused during the high-speed milling processes. Preferably, the bridge has an ovate arch, or has a rear face having an ovate contour.

Abstract: The pipeline leak detector is a mobile device having a pressure sensor array for travel within a fluid pipeline for leak detection in the pipe wall. The sensor array is positioned close to the internal surface of the pipe wall and rotates circumferentially about the surface of the pipe wall as the device travels through the pipe, thus describing a helical path along the pipe wall to cover the entire internal surface of the pipe wall with a minimal number of sensors. The sensors comprise tubes with conical mouths, and flexible members and strain gauges within the tubes. Pressure changes due to leaks cause the flexible members to move, with the strain gauges sending signals to a central processor to indicate a leak. The device is supported by a drive wheel, a driven wheel, and an idler wheel bearing against the internal surface of the pipe and evenly circumferentially spaced.

Abstract: Leak detection apparatus for deployment in a pipe. The apparatus includes a carrier disposed for motion along the pipe and a detector connected to move with the carrier in an axial direction. The detector comprises a drum mounted for rotation about pitch and yaw axes. A flexible material is mounted on, and extends from, the drum and at least two sensors responsive to drum rotation are provided. The flexible material will be drawn into contact with a wall of the pipe at a leak location, thereby producing a torque on the drum, causing the drum to rotate, and the at least two sensors to generate signals from which leak location is determined.

Abstract: The dual resonator chamber with variable volume includes first and second housings. The second housing is slidably mounted within the first housing such that a second inner neck portion of the second housing is slidably mounted about the first inner neck portion of the first housing and forms a fluid-tight seal therewith. A sliding wall is slidably mounted within the second housing, dividing the interior thereof into upper and lower resonator chambers. At least one first actuator selectively adjusts the height of the sliding wall with respect to the second lower end of the second housing to selectively adjust volumes of the upper and lower resonator chambers. At least one second actuator selectively adjusts the height of the second housing with respect to the first housing to selectively adjust the neck length of the lower resonator chamber.

Abstract: Wireless communication system for underground pipeline inspection. The system includes a plurality of sensor nodes moved by robots within the pipeline and each sensor node includes a radio transceiver. A plurality of spaced apart, above ground relay nodes are deployed along the pipeline, each relay node including a radio transceiver for communication with the sensor nodes. A remote monitoring center is provided in communication with the relay nodes, whereby a leak detected by a sensor node is communicated to the remote monitoring center. Each sensor node may further include a microcontroller, an accelerometer and a timer.