We demonstrate tomographic imaging of room-sized spaces using the propagation properties of 2.4GHz, IEEE 802.15.4 Direct Sequence Spread Spectrum (DSSS) radio waves. We have successfully imaged dielectric phantom objects of the order of the RF wavelength (12.5 cm) in a wireless ZigBee network using only received signal strength indicator (RSSI) data. The Microchip ZigBee stack is utilized to provide an application layer program to control the network and provide an outlet for network data. Using the data collected by a coordinator node, tomographic methods are applied to the data to create images of objects that are physically located within a network of nodes.
Bringing airline pilots to remote locations for evaluation of new software/hardware tools and procedures is an expensive process in terms of both money and time. Estimating the design and outcome of a study to evaluate these new tools can be tricky as there are many new variables for which there is little to no data. However, sometimes even after careful vetting of scenarios in the simulator prior to bringing subject-matter experts into the simulation facility, few to no metrics of statistical significance can be found. While it may be valid that there are no metrics of statistical significance, it is perhaps a missed opportunity to take advantage of the precious time and resources of having a subject-matter expert at the research facility. The research presented in this paper has developed a software tool for simulating a pilot's visual perception of working in various configurations of cockpits. This may provide researchers insight into what types of scenarios and tactics would be of interest to use with real subject-matter experts. In other words, this should help identify the best use of resources to take advantage of having pilots at the facility and avoid scenarios/procedures that don't generate data of interest. Another useful possibility with this tool is identifying cockpits that may be inefficiently designed. Instruments that should be grouped together can be easily identified by analyzing the eye-scan pattern of the model with different cockpitconfiguration files. The results that this new software-evaluation tool provides have implications for several different evaluations beyond estimating pilot reactions. vi
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.