Recent developments in safety-critical systems have heightened the need for hazard analysis because results of their accidents have become more and more serious. Traditional hazard analysis techniques, such as fault tree analysis (FTA) or failure mode and effects analysis (FMEA), have been extensively used for decades. However, traditional techniques are not suitable for modern systems which ar...

A growing threat to the cyber-security of embedded safety-critical systems calls for a new look at the development methods for such systems. One alternative to address security and safety concerns jointly is to use the perspective of modeling using system theory. Systems-Theoretic Process Analysis (STPA) is a new hazard analysis technique based on an accident causality model. NIST SP 800-30 is ...

The IncHI1 self-transmissible plasmid pSf-R27 from Shigella flexneri 2a strain 2457T harbors sfh, a gene that codes for a protein with strong amino acid sequence homology to the global transcription regulator and nucleoid-associated protein H-NS and to its paralogue, StpA. Previously, we discovered that the expression of sfh mRNA is growth phase dependent such that in cultures growing in Lennox...

The technology for collaborative robots and the way these technologies are used in current socio-technical work systems rapidly evolving industrial applications. In absence of prescribed safety assessment methods from normative standards, this paper explores capabilities an STPA analysis behaviour robot We applied to a with heavy-load manipulating arm gripper, mounted on AGV-type mobile base. s...

Traditional safety analysis techniques have shown difficulties in incorporating dynamically changing structures of CPSs (Cyber-Physical Systems). STPA (System-Theoretic Process Analysis), one the widely used, needs to unfold and arrange all hidden before beginning a full-fledged analysis. This paper proposes an intermediate model “Information Unfolding Model (IUM)” process (IUP)” dynamic which ...

While the concept of smart shipping is expected to shape future maritime industry, its safety still a major concern. New risks might emerge when shifting from human controllers onboard, autonomous software and remote controllers. The uncertainties associated with emerging require an efficient decision-making methodology ensure ship safety. This paper proposes framework for selecting Risk Contro...