Working on various unmanned platform projects. Defined multiple autonomy architectures/frameworks per project needs. Working on identifying and applying AI/ML algorithms that meet a sponsor need. working across team / department boundaries to ensure the highest quality solutions are available for sponsors.

Switched to our research arm, the Advanced Technology Center, and work (telecommute) as a software engineer in a group that, among other things, performs research into UAVs in commercial airspace and autonomous UAV operation.* Primarily responsible for software development on a demonstration platform for UAS in the National Airspace, which includes integration of multiple existing systems, translation of data between different formats/protocols of the devices, prototyping of ground station GUIs in a fast pace, constantly evolving research environment. Created a web-based map display of NASA's UTM (UAV Traffic Management) traffic based on python, node.js, Cassandra, and MongoDB.* Working on a project researching autonomous drone operation with the AI language/runtime SOAR from the University of Michigan, which includes experiments with reinforcement learning in simulation and on drone hardware. Exploring other areas of machine learning and artificial intelligence to see how they can be applied to our needs.* Working on autonomous UAV behaviors including proposing, implementing, and demonstrating a neural-net based approach to flying an aircraft performing a join maneuver using Tensorflow.

DO178B Level A software development for real time operating systems including drivers and board support package.Example accomplishments from the last couple of years:* Port LynxOS-178 to Wind River Hypervisor on muliticore Freescale processor.* Help define software architectures for new processor platform. Develop multiple approaches, trade costs and benefits, make recommendations to support bid and proposal activities.* Develop an architecture within LynxOS-178 that allows a 3D graphics card to be powered on up to 30 minutes after the rest of the system, yet still functions in a Level A safety critical environment. Required a total rewrite of the PCI enumeration component within LynxOS-178B (called the DRM). Old DRM code base was approx 4000 SLOCs, new DRM code base approx 1200 SLOCs. New codebase performed all functions of the old code base, in 1/4 of the code. New algorithm does not use recursion, yet recursively descends a PCI topology including multiple levels of bridges. Ran new 1200 SLOC code base against Coverity, and found only one issue in a debug statement.* Analysis of effects of L2 cache and DMA on determinism on a PowerPC platform of a Real Time Operating System in DO178B Level A environment.* Developed a tracing tool that uses low-level assembly to scan symbol table and dynamically insert itself into the LynxOS-178 operating system. Records system events of interest such as context switches, VM swaps, and system calls.

Software test development for RAID option ROM.Option ROMs are typically very difficult to test, as they are embedded in the early startup process of an Intel x86 PC. Developed a DOS TSR-based test harness that simulated the BIOS startup process, loaded the Option ROM in memory, set up test inputs, executed the Option ROM, and gathered up the test results.Added a capability to the approach that used the debug register to set breakpoints and interrupt handler to catch the breakpoints, examine the register state, and either record data or inject changes in the data flow.Used this debug interrupt approach to gather data on execution path (logging flow of code with single step breakpoint). Wrote PERL script to correlate the execution path with line of code executed, created a statement coverage tool that created HTML reports of source code with annotations describing coverage. Used tool to inject errors that allowed 98% statement coverage on the Option ROM.Also worked for 6 months or so on some portions of EFI BIOS. Created Windows-based test tools in MFC and Win32, and some Web based tools in ASP and ASP.NET.