Abstract: Disclosed herein is a method and a data processing system for environment evaluation, and a computer-readable storage medium with a computer program for executing the aforementioned method stored thereon. A data processing system according to one aspect comprises: at least one processor; at least one memory; and a computer program stored on the memory and executable on the processor, wherein execution of the computer program on the processor results in the following operations: obtaining user evaluations of an environment and environmental parameter measurements from a plurality of mobile devices; and generating evaluation information about the environment from the user evaluations and the environmental parameter measurements.

Abstract: A roaming videoconferencing (VTC) system incorporates a portable VTC device with client bridge wireless connectivity that couples to the closest access point (AP) assembly with FCC compliant, enhanced range. Use of APs in combination with amplified directional antennas is successfully demonstrated for two-way VTC, even given their generally-known low Effective Isotropic Radiated Power (EIRP ) and half-duplex broadcasting. Optional video, audio and data wireless and capabilities are incorporated into the portable VTC device. Facilities that have a connection to Internet or an ISDN public switched telephone network may thus flexibly provide high-quality VTC to widely spaced parts of the facilities, grounds or work site without the inconvenience or expense of placement of ISDN lines.

Abstract: A roaming videoconferencing (VTC) system incorporates a portable VTC device with client bridge wireless connectivity that couples to the closest access point (AP) assembly with FCC compliant, enhanced range. Use of APs in combination with amplified directional antennas is successfully demonstrated for two-way VTC, even given their generally-known low Effective Isotropic Radiated Power (EIRP) and half-duplex broadcasting. Optional video, audio and data wireless and capabilities are incorporated into the portable VTC device. Facilities that have a connection to Internet or an ISDN public switched telephone network may thus flexibly provide high-quality VTC to widely spaced parts of the facilities, grounds or work site without the inconvenience or expense of placement of ISDN lines.

Abstract: An error correction circuit for use with an analog-to-digital converter (ADC) comprising a first switch and a second switch and correction capacitor arranged in parallel and coupled to the first switch. The second switch is also coupled to ground and the correction capacitor is also coupled to a reference voltage wherein the first switch is arranged to be active during a hold mode of the ADC and the second switch is arranged to be active during a sample phase of the ADC.

Abstract: A roaming videoconferencing (VTC) system incorporates a portable VTC device with client bridge wireless connectivity that couples to the closest access point (AP) assembly with FCC compliant, enhanced range. Use of APs in combination with amplified directional antennas is successfully demonstrated for two-way VTC, even given their generally-known low Effective Isotropic Radiated Power (EIRP) and half-duplex broadcasting. Optional video, audio and data wireless and capabilities are incorporated into the portable VTC device. Facilities that have a connection to Internet or an ISDN public switched telephone network may thus flexibly provide high-quality VTC to widely spaced parts of the facilities, grounds or work site without the inconvenience or expense of placement of ISDN lines.

Abstract: A wireless mobile videoconferencing system is provided for video, audio, and data communication that is both two-way and mobile, and in communication with other videoconferencing systems around that world. In particular, a mobile teleconferencing system includes a Very Small Aperture Antenna (VSAT) that is in satellite communication with a Technical Operations Center (TOC), which in turn is connected to the public switched telephone network (PSTN) and the Internet. Additional mobility is gained by a portable teleconferencing system (e.g., rollaway self-powered system, briefcase system) that is in wireless communication with the mobile teleconferencing system. Thus, audio, video, telephone, and data communication can be achieved in locations inaccessible to even a vehicle and without electrical power. The mobile videoconferencing system has applications to telemedicine, distance education, business communication, crisis response (e.g.