Ensuring safety is crucial for the successful deployment of autonomous systems, such as self-driving vehicles, unmanned aerial and robots acting close to humans. While there exist many controllers that optimize certain criteria, energy consumption, comfort, or low wear, they are usually not able guarantee at all times constrained nonlinear systems affected by disturbances. Many providing guaran...

Purpose This study examines the connection between different digital-twin characteristics and organizational control. Specifically, aims to examine whether exploration, guidance gamification will affect formal social Design/methodology/approach The is based on an analysis of survey results from 139 respondents comprising applied university students who use digital twins. Findings offer interest...

The problem proposed by Gauss of characterizing the code of a simple crossing closed curve (SCCC, for short) can be considered a formal language question. We define three related infinite languages. Two of them are regular; the type of the third is an open problem.

let $k$ be a field of characteristic$p>0$, $k[[x]]$, the ring of formal power series over $ k$,$k((x))$, the quotient field of $ k[[x]]$, and $ k(x)$ the fieldof rational functions over $k$. we shall give somecharacterizations of an algebraic function $fin k((x))$ over $k$.let $l$ be a field of characteristic zero. the power series $finl[[x]]$ is called differentially algebraic, if it satisfies...

Related Concepts – Access-control architectures – Formal verification – Identity management – Model-based development – Policy languages – Security policies Definition A formal method is any technique or method that aids in the construction and validation of computer-based systems and is based, in total or in part, on rigorous mathematics. Access control [8] refers to any method or mechanism by...

It is well-known that a fundamental problem in embedded control systems is the veriication of the safety requirements. Formal methods and related support tools can successfully be applied in the formal proof that a system is safe. However, the complexity of real systems is such that automated tools often fail to formally validate such systems. A typical case is when \state explosion" problems a...

We present DHARMA, a distributed high assurance reference monitor that is generated mechanically by the formal methods tool PVS from a verified specification of its key algorithms. DHARMA supports policies that allow delegation of access rights, as well as structured, distributed names. To test DHARMA, we use it as the core reference monitor behind a web server that serves files over SSL connec...