Few other organisations (either of state or of commerce) could rival the early Victorian Post Office in the extent of its national coverage. Imagine a three-by-three grid overlaid on your office space or desktop to find it. New features in the Windows release include the ability to create, open, edit, save, and share files in the cloud straight from the desktop, a new search tool for commands available in Word, PowerPoint, Excel, Outlook, Access, Visio and Project named “Tell Me”, more “Send As” options in Word and PowerPoint, and co-authoring in real time with users connected to Office Online. This NASA-funded project investigated what sorts of assurances are necessary and appropriate to justify the application of formal methods tools throughout all phases of design in real safety-critical settings. In addition to the central office, there are several OAE Centers and OAE Nodes in different countries. NextGen will encompass airborne and ground-based nodes with significant computational elements acting in coordination to maintain a safe and efficient airspace. The verification costs of even more complex NextGen systems in the future will impact safety not just through an increasing incidence of errors and unforeseen interactions, but by delaying and preventing the deployment of crucial safety functions.

Advanced capabilities planned for the next generation of aircraft and the Next Generation Air Transportation System (NextGen) will be based on complex new software. Aircraft will incorporate adaptive control algorithms that will provide enhanced safety and robustness in the presence of failures and adverse flight conditions. Integrated Modular Avionics (IMA) will enable the implementation of more functionality in software and tighter integration of these functions to improve aircraft efficiency. Electricity moves more easily through substances with lots of free electrons, like copper, than it does through substances with fewer free electrons, like carbon. Even if you aren’t familiar with the tooth fairy’s origin story, you’ve likely heard of her or encountered a kid like Killgrove’s daughter who’s perhaps a little overly excited to earn some dough. While not intended to be a complete example, it is representative of the issues encountered in actual avionics development projects and includes design artifacts specified using PVS, MathWorks Simulink/Stateflow®, and C source code. His background includes work with formal methods for system and software analysis, the design of real-time embedded systems for safety-critical applications, and the development of nuclear propulsion systems in the U.S. The remaining three facades have a similar but simpler design.

And it’s theorized Titan’s atmosphere could have “ice volcanoes” that spew water instead of lava. As these systems have grown in complexity, their verification has become the single most costly development activity. In this NASA-funded project we are addressing these challenges by developing a framework for compositional verification that will permit the verification of systems that exceed the complexity limits of current approaches. This NASA-funded project developed three case studies describing the use of different classes of formal methods to satisfy DO-178C certification objectives. Updated certification guidance for airborne software was recently published in RTCA DO-178C. Dr. Cofer served on RTCA committee SC-205 developing new certification guidance for airborne software (DO-178C) and was one of the developers of the Formal Methods Supplement (DO-333). RTCA DO-333, Formal Methods Supplement to DO-178C and DO-278A provides guidance for software developers wishing to use formal methods in the certification of airborne systems and air traffic management systems.

His area of expertise is developing and applying advanced analysis methods and tools for verification and certification of high-integrity systems. A companion document, DO-333, the formal methods supplement, allows applicants to receive certification credit for verification conducted using formal methods. This approach allows us to leverage existing development processes for software components and provides a scalable way to reason about the system as a whole. LAIX allows users to write and read ILIAS learning modules offline and to export to ePUB3 e-book file format. Leading up to the rover’s landing, users could track the distance remaining until Perseverance reached Mars and view the spacecraft up close. The rocket was launched on July 30, 2020, at 11:50 UTC, and the rover landed on Mars on February 18, 2021, at 20:55 UTC, with a planned surface mission of at least one Mars year (668 sols or 687 Earth days). The mission launched in November 2021 and targeted Dimorphos, a small space rock 530 feet in diameter that orbits a larger, 2,560-foot asteroid called Didymos.