Abstract: A communication system is described. The communication system includes a number of nodes which frequency hop without coordination from a frequency table. To establish communication, the nodes scan across a band for one or more signals of interest. The signals of interest include one or more of a synchronization signal, a control signal, and a traffic signal. When transmitting the signals of interest, the nodes determine one or more characteristic for the signal, such as a channel, based on a spectral occupancy of interferers in the band.

Abstract: A communication system is described. The communication system includes a number of nodes which frequency hop without coordination from a frequency table. To establish communication, the nodes scan across a band for one or more signals of interest. The signals of interest include one or more of a synchronization signal, a control signal, and a traffic signal. When transmitting the signals of interest, the nodes determine one or more characteristic for the signal, such as a channel, based on a spectral occupancy of interferers in the band.

Abstract: A high-frequency beyond line of sight ad-hoc communication system is disclosed. In embodiments, the system includes an originating node. The originating node is configured to transmit a transmission. In, the system includes a destination node. The destination node is configured to receive the transmission using one or more antennas. In, the system includes one or more relay nodes, which are configured to relay the transmission from the operating mode to the destination mode in a time diverse manner. The relay nodes further comprise a controller, configured to facilitate high-frequency beyond line of sight communication between the originating node and the destination node, wherein the transmission is carried in accordance with a TDMA based waveform that supports frames and time slots. In embodiments, the one or more relay nodes are further configured to relay the transmission from the originating mode to the destination mode in a frequency diverse manner.

Abstract: Embodiments of the present disclosure are directed to a jam resistant signal. The signal is transmitted from a terminal to a satellite. The signal may include two waveform components. The first waveform component includes a Frequency Division Duplex (FDD) wideband Direct Spread Spectrum (DSSS) waveform. The FDD wideband DSSS waveform may include one or more spectrally notched portions. At least one of the spectrally notched portions may be for the second waveform component. The second waveform component includes an FDD narrowband waveform.

Abstract: A high-frequency beyond line of sight ad-hoc communication system is disclosed. In embodiments, the system includes an originating node. The originating node is configured to transmit a transmission. In, the system includes a destination node. The destination node is configured to receive the transmission using one or more antennas. In, the system includes one or more relay nodes, which are configured to relay the transmission from the operating mode to the destination mode in a time diverse manner. The relay nodes further comprise a controller, configured to facilitate high-frequency beyond line of sight communication between the originating node and the destination node, wherein the transmission is carried in accordance with a TDMA based waveform that supports frames and time slots. In embodiments, the one or more relay nodes are further configured to relay the transmission from the originating mode to the destination mode in a frequency diverse manner.

Abstract: The present application is directed to systems and methods for a career and courses portal. Users of the portal may be students or recent graduates, or employers. The portal may utilize gamification, or providing game-like achievement features such as awards or badges, to encourage users to enroll in and take courses, take assessment tests, edit their profiles, look for career opportunities, etc. Employers may place job openings on the portal and associate skill requirements with the job openings. Users who possess the skill requirements may qualify for these job openings. The portal may operate under a freemium model, where some services are available to users without charge and other services are behind a paywall. The portal may also charge employers for some services. The portal may utilize an algorithm that matches jobs and courses for each user. The portal may include a leaderboard system. The portal may determine one or more trending jobs.

Abstract: A method and system is disclosed for a local approach within a distributed multi-hop radio environment that switches between a stronger and weaker preamble acquisition. The robustness of the preamble acquisition plays a large part in the performance of a given Signal-in-Space (SiS) modulation scheme. A more robust preamble acquisition can result in a higher packet completion rate at a receiver free of interfering signals. A less robust preamble acquisition can result in less chance that an interfering signal will be acquired, thereby allowing increased spatial reuse and network throughput. To maximize network capacity, the disclosed method leverages both cases by dynamically switching between the less and more robust preamble acquisitions depending on the topology of the distributed multi-hop radio environment and desired quality of service.

Abstract: A file I/O operation is initiated to store a result of a file I/O operation in a destination file. In response to the file I/O operation being in progress, an amount of the file I/O operation currently completed is monitored. In response to determining that the amount of the file I/O operation currently completed is less than a threshold amount, another destination file is specified through a user interface, in which to store a result of file I/O operation not yet completed. The file I/O operation stores the remaining result of the file I/O operation at the another destination file. A single file handle is updated for the result of the file I/O operation to reference the destination file comprising the portion of the result and the another destination file comprising the remaining result.

Abstract: A file I/O operation is initiated to store a result of a file I/O operation in a destination file. In response to the file I/O operation being in progress, an amount of the file I/O operation currently completed is monitored. In response to determining that the amount of the file I/O operation currently completed is less than a threshold amount, another destination file is specified through a user interface, in which to store a result of file I/O operation not yet completed. The file I/O operation stores the remaining result of the file I/O operation at the another destination file. A single file handle is updated for the result of the file I/O operation to reference the destination file comprising the portion of the result and the another destination file comprising the remaining result.