The use of unmanned aircraft system for the radio frequency interference measurements

Abstract The unmanned aircraft systems (UAS) are commonly used for aerial photography, express delivery for packets or video monitoring. The UAS technology can help responding to the growing demands of the frequency monitoring by national radiocommunication authorities (NRAs). This article presents a practical usage trial of an unmanned aircraft for monitoring the spectrum usage and finding the interference location. The monitoring of spectrum usage is one part of the NRAs’ process for guarantee user compliance with radio license conditions. Finding illegal or malfunctioning transmitters is a challenging task especially in urban environment, due to multi-path propagation conditions. This study focuses on practical assessment of the method for determining accurate location of radio frequency interference sources from the buildings using the UAS technology. The practicability of the UAS technology usage in spectrum monitoring activities was under the evaluation. This study showed promising results that UAS with the measurement equipment setup suits NRAs’ as a tool for mobile monitoring on the air

Moving versus stopped motor vehicle screen use: Engagement, perceptions, and correlates

Research on texting while driving routinely does not distinguish between drivers’ moving (while actively driving) and stopped (e.g., while at a red light) screen use behavior, but these behaviors conceptually differ in risk. The purpose of this study was to analyze differences in the prevalence, evaluations, and correlates of moving versus stopped motor vehicle screen use (MVSU). Participants were 236 adults (Mage = 35.36; 71% female) representing 31 U.S. states. Results indicate that individuals perceive and evaluate moving and stopped motor vehicle screen use (MVSU) differently, as well as engage in these behaviors at different rates. Compared to moving MVSU, participants engaged in stopped MVSU more frequently, felt more efficacious and less guilty about such behavior, and evaluated it as less risky, more acceptable, and as less reflective of moral values. Although levels of stopped versus moving MVSU were strongly correlated, larger differences in evaluations of stopped versus moving MVSU were associated with weaker correlations between engaging in the two MVSU behaviors. Participant age, race, and gender also moderated associations between stopped and moving MVSU