All Outputs (34)

A synthesis of logic and biology in the design of dependable systems (2015)
Journal Article
Papadopoulos, Y. (2015). A synthesis of logic and biology in the design of dependable systems. IFAC Proceedings Volumes/ International Federation of Automatic Control, 28(7), 1-8. https://doi.org/10.1016/j.ifacol.2015.06.465

The technologies of model-based design and dependability analysis in the design of dependable systems, including software intensive systems, have advanced in recent years. Much of this development can be attributed to the application of advances in f... Read More about A synthesis of logic and biology in the design of dependable systems.

Model transformation for multi-objective architecture optimisation of dependable systems (2015)
Journal Article
Mian, Z., Bottaci, L., Papadopoulos, Y., Sharvia, S., & Mahmud, N. (2015). Model transformation for multi-objective architecture optimisation of dependable systems. Advances in Intelligent Systems and Computing, 307, 91-110. https://doi.org/10.1007/978-3-319-08964-5_6

The promise of model-based engineering is that by use of an integrated and coherent system model both functional and non-functional requirements may be analysed, implemented and tested in a rigorous and cost-effective manner. An important part of mod... Read More about Model transformation for multi-objective architecture optimisation of dependable systems.

An approach to safety analysis of clinical workflows (2014)
Journal Article
Al-Qora'n, L., Gordon, N., Sharvia, S., Walker, M., & Papadopoulos, Y. (2014). An approach to safety analysis of clinical workflows. Athens Journal of Health, 1(3), 201-216. https://doi.org/10.30958/ajh.1-3-4

A clinical workflow considers the information and processes that are involved in providing a clinical service. They are safety critical since even minor faults have the potential to propagate and consequently cause harm to a patient, or even for a pa... Read More about An approach to safety analysis of clinical workflows.

Enhancing the EAST-ADL error model with HiP-HOPS semantics (2014)
Journal Article
Sharvia, S., Papadopoulos, Y., Chen, D., Walker, M., Yuan, W., & Lönn, H. (2014). Enhancing the EAST-ADL error model with HiP-HOPS semantics. Athens journal of technology & engineering, 1(2), 119-136

EAST-ADL is a domain-specific modelling language for the engineering of automotive embedded systems. The language has abstractions that enable engineers to capture a variety of information about design in the course of the lifecycle — from requiremen... Read More about Enhancing the EAST-ADL error model with HiP-HOPS semantics.

Automatic optimisation of system architectures using EAST-ADL (2013)
Journal Article
Walker, M., Reiser, M., Tucci-Piergiovanni, S., Papadopoulos, Y., Lönn, H., Mraidha, C., …Servat, D. (2013). Automatic optimisation of system architectures using EAST-ADL. Journal of Systems and Software, 86(10), 2467-2487. https://doi.org/10.1016/j.jss.2013.04.001

There are many challenges which face designers of complex system architectures, particularly safety-critical or real-time systems. The introduction of Architecture Description Languages (ADLs) has helped to meet these challenges by consolidating info... Read More about Automatic optimisation of system architectures using EAST-ADL.

Compositional synthesis of temporal fault trees from state machines (2012)
Journal Article
Papadopoulos, Y., Walker, M., & Mahmud, N. (2012). Compositional synthesis of temporal fault trees from state machines. Performance Evaluation Review, 39(4), 79-88. https://doi.org/10.1145/2185395.2185444

Dependability analysis of a dynamic system which is embedded with several complex interrelated components raises two main problems. First, it is difficult to represent in a single coherent and complete picture how the system and its constituent parts... Read More about Compositional synthesis of temporal fault trees from state machines.

Integrated safety and architecture modeling for automotive embedded systems (2011)
Journal Article
Chen, D., Johansson, R., Lönn, H., Blom, H., Walker, M., Papadopoulos, Y., …Sandberg, A. (2011). Integrated safety and architecture modeling for automotive embedded systems. Elektrotechnik und Informationstechnik : E & I, 128(6), 196-202. https://doi.org/10.1007/s00502-011-0007-7

EAST-ADL is an architecture description language (ADL) for model-based development of automotive embedded systems. The formalization of domain-specific engineering information and methodology brings a potential for a wide range of benefits for inform... Read More about Integrated safety and architecture modeling for automotive embedded systems.

An approach to optimization of fault tolerant architectures using HiP-HOPS (2011)
Journal Article
Adachi, M., Papadopoulos, Y., Sharvia, S., Parker, D., & Tohdo, T. (2011). An approach to optimization of fault tolerant architectures using HiP-HOPS. Software: Practice and Experience, 41(11), 1303-1327. https://doi.org/10.1002/spe.1044

New processes for the design of dependable systems must address both cost and dependability concerns. They should also maximize the potential for automation to address the problem of increasing technological complexity and the potentially immense des... Read More about An approach to optimization of fault tolerant architectures using HiP-HOPS.

Capture and reuse of composable failure patterns (2010)
Journal Article
Wolforth, I., Walker, M., Papadopoulos, Y., & Grunske, L. (2010). Capture and reuse of composable failure patterns. International Journal of Critical Computer-Based Systems, 1(1/2/3), 128-147. https://doi.org/10.1504/IJCCBS.2010.031710

Emerging safety analysis techniques use composition of failure models or fault simulation in formal models of a system to determine relationships between the causes and effects of failure. Most recent work has focused on developing system modelling a... Read More about Capture and reuse of composable failure patterns.

Generalizable safety annotations for specification of failure patterns (2010)
Journal Article
Papadopoulos, Y., Walker, M., Grunske, L., & Wolforth, I. (2010). Generalizable safety annotations for specification of failure patterns. Software: Practice and Experience, 40(5), 453-483. https://doi.org/10.1002/spe.966

Components in programmable systems often exhibit patterns of failure that are independent of function or system context. In this paper, we show that it is possible to capture, and reuse where appropriate, such patterns for the purposes of system safe... Read More about Generalizable safety annotations for specification of failure patterns.

Qualitative temporal analysis: Towards a full implementation of the Fault Tree Handbook (2009)
Journal Article
Papadopoulos, Y., & Walker, M. (2009). Qualitative temporal analysis: Towards a full implementation of the Fault Tree Handbook. Control engineering practice, 17(10), 1115-1125. https://doi.org/10.1016/j.conengprac.2008.10.003

The Fault tree handbook has become the de facto standard for fault tree analysis (FTA), defining the notation and mathematical foundation of this widely used safety analysis technique. The Handbook recognises that classical combinatorial fault trees... Read More about Qualitative temporal analysis: Towards a full implementation of the Fault Tree Handbook.

Semi-automatic FMEA supporting complex systems with combinations and sequences of failures (2009)
Journal Article
Walker, M., Papadopoulos, Y., Parker, D., Lönn, H., Törngren, M., Chen, D., …Sandberg, A. (2009). Semi-automatic FMEA supporting complex systems with combinations and sequences of failures. SAE International Journal of Passenger Cars - Mechanical Systems, 2(1), 791-802. https://doi.org/10.4271/2009-01-0738

Failure Modes and Effects Analysis (FMEA) is a well established safety analysis technique used for the assessment of safety critical engineering systems in the automotive industry. Although FMEA has been shown to be useful, the analysis is typically... Read More about Semi-automatic FMEA supporting complex systems with combinations and sequences of failures.

Multi-objective optimization of dependability attributes using an asynchronous heterogeneous hierarchical parallel genetic algorithm (2008)
Journal Article
Wenhua, Z., Papadopoulos, Y., & Parker, D. (2008). Multi-objective optimization of dependability attributes using an asynchronous heterogeneous hierarchical parallel genetic algorithm. IFAC Proceedings Volumes/ International Federation of Automatic Control, 41(3), 199-204. https://doi.org/10.3182/20081205-2-cl-4009.00036

The optimal satisfaction of dependability attributes and cost, in the design of engineering systems, is a hard multi-objective optimization problem which requires automated algorithms that can effectively search large design spaces. In this paper, a... Read More about Multi-objective optimization of dependability attributes using an asynchronous heterogeneous hierarchical parallel genetic algorithm.

Synthesis and analysis of temporal fault trees with PANDORA: the time of Priority AND gates (2007)
Journal Article
Walker, M., & Papadopoulos, Y. (2008). Synthesis and analysis of temporal fault trees with PANDORA: the time of Priority AND gates. Nonlinear Analysis: Hybrid Systems, 2(2), 368-382. https://doi.org/10.1016/j.nahs.2006.05.003

Classical Fault Tree Analysis (FTA) can determine the effects of combinations of failure events on a system but cannot capture the significance of the temporal order of events, which may be critical. In this paper, we propose an extension based on fo... Read More about Synthesis and analysis of temporal fault trees with PANDORA: the time of Priority AND gates.