Barnert Tomasz, Kosmowski Kazimierz T., Piesik Emilian, Śliwiński Marcin
Security aspects in functional safety analysis
A security level of distributed control and protection system may have a significant impact on the results of functional safety analysis. However, the issue of integrating the safety and security aspects is difficult and usually is neglected during the functional safety analysis. This article presents a method of functional safety analysis which takes into consideration a concept of integrating these two aspects. It is based on proposed classification of communication channels used in the computer system / network and the scope of such system distribution. The functional safety analysis is to be performed at every stage of system lifecycle, but one of the most important parts is defining required safety functions and determining the safety integrity level for them.
The integration concept might be taken into account at this stage. The basis of a method proposed is the
assumption that the security level is considered as a risk parameter in graphs of functional safety analyses.[full text]
Berg Heinz Peter, Seidel Freddy
Interface between nuclear safety and security
Nuclear power plants benefit from a sophisticated and comprehensive safety regime that has been established over the years. However, the security regime for nuclear power plants is far less developed than the safety regime. Although adopting (and adapting) certain elements of the nuclear safety regime could significantly strengthen the nuclear security regime, at least four challenges are likely to surface: national sovereignty, information transparency, lack of policy consensus, and challenges of regime harmonization. Seek an optimal balance between mandatory international standards and voluntary actions and endorse consideration of additional binding and non-binding international safety and security requirements.[full text]
Blokus-Roszkowska Agnieszka, Kołowrocki Krzysztof
Reliability analysis of complex shipyard transportation system with dependent components
In the paper an approach to the reliability analysis of multi-state systems with dependent components operating at variable operation conditions is presented. The multi-state reliability function of complex system is defined and determined for the shipyard rope ship elevator. In developed models, it is assumed that system components have the multi-state exponential reliability functions with interdependent departures rates from the subsets of reliability states.
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Dagkinis Ioannis, Lilas Theodoros, Nikitakos Nikitas, Stefanakou Afrokomi-Afroula
Evaluating the combination of wind and wave renewable sources in an offshore platform using TOPSIS multicriteria method
The benefits of combining renewable energy systems are not limited to functional and structural features, but also achieves to increase the period of operation of reverse osmosis desalination on an annual basis and hence water production will be increased. In this article, by assessing the risks arising between systems interconnection of selected technologies and through the application of Technique for Order Preference by Similarity to the Ideal Solution (TOPSIS) multicriteria method qualitative and quantitative criteria are taken into account in respect to the comparison among different renewable technologies either stand-alone or in combination, the conclusion is the relationship of the selected combination with the ideal solution. The application aims to achieve, through the usage of operational and financial data, the quantification of benefits of the combining wind and wave renewal energy power in an offshore platform using the proposed method as an assessment toold. [full text]
Dziula Przemysław, Kołowrocki Krzysztof, Siergiejczyk Mirosław
Critical infrastructure systems modelling
The article is showing some concept of critical infrastructure system’s safety states model. Model construction is basing on popular technical systems’ safety states models, and notions specified in acts of law related to crisis management and other studies concerning it. Implementation of crisis management issues and problems into technical systems’ safety states model, resulted with formulating of critical infrastructure system’s safety states model, illustrating processes concerned with their transitions, related to particular crisis management phases. Then, probabilistic description of critical infrastructure safety states transitions process have been presented, that, if further evolved, can lead to support works connected to critical infrastructure protection. [full text]
Eid Mohamed, Serafin Dominique, Yohan Barbarin, Lionel Estel, Souza de Cursi Eduardo, El Hami Abdelkhalak
Critical Infrastructures Protection (CIP) – contribution to EU research on resilience & preparedness
Critical Infrastructure (CI) Preparedness and Resilience modelling, simulation & analysis (MS&A) receive a
strong interest from systems safety and risk management engineering and research communities. This technical
and scientific interest responds to the rapid growth of the use of the smart technology in the modern society
activities. The concept of resilience in CIP is not yet clearly defined. However, a probabilistic model is
proposed describing the robustness and the resilience of a well-defined infrastructure facing a given threat. [full text]
Franciszek Grabski
Semi-Markov processes: application in system reliability and maintenance
The author’s monograph “Semi-Markov Processes: Application in System Reliability and Maintenance” which
will be published by Elsevier in 2014 is presented. The paper is composed of an introduction, the monograph
contents, conclusions and the references the monograph contents is based on.
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Franciszek Grabski
Non-renewal multistate system with Semi-Markov components
The paper deals with non-renewal multistate monotone systems consisting of multistate components which are
modeled by the semi-Markov processes. In the case of a non-renewal system the multistate reliability functions of the system components and the whole system are discussed. All presented concepts and models are illustrated by simple numerical examples.
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Grigoriev Leonid, Guseinov Chingiz, Kershenbaum Vsevolod, Kostogryzov Andrey
The systemic approach, based on the risks analysis and optimization, to research variants for developing hydrocarbon deposits of Arctic regions
The original methodological approach based on the risks analysis and optimization is proposed to research
variants for developing hydrocarbon deposits of Arctic regions. The basic analytical problems that are due to be solved by probabilistic modelling of processes are formulated. Input and otput allow to research different variants for developing hydrocarbon deposits of Arctic regions. Some effects are demonstrated by example. [full text]

Lucjan Gucma
Acceptable risk and probability of collision assessment in area of bridges in respect of ships collisions
The paper presents selected problems of risk management in respect of ship collisions with bridges. Accident statistics in Poland and around the world are presented. Wide discussion on bridge collapse risk acceptance criteria have been carried out. Finally to different case studies of probability assessment taking into account both horizontal and vertical clearances. [full text]

Guze Sambor
Application of the knapsack problem to reliability multi-criteria optimization
The main aim of the paper is to translate reliability problems to the knapsack optimization problem. The review
of the known methods of multi-criteria optimization is done. Particularly, the SPEA algorithm is presented.
Furthermore, the 0-1 knapsack problem solution by SPEA algorithm is introduced and used to the reliability
optimization of exemplary parallel-series system.[full text]
Kołowrocki Krzysztof, Soszyńska-Budny Joanna
Operation and reliability optimization of complex technical systems
Modelling and prediction of the operation and reliability of technical multistate ageing systems related to their operation processes called complex systems are briefly presented and applied to prediction of the operation processes and reliability characteristics of an exemplary complex non-homogeneous system composed of a series-parallel and a series-“m out of l” subsystems linked in series, changing its reliability structure and its components reliability parameters at variable operation conditions. Further, the linear programming is proposed to the operation and reliability optimization of complex technical systems operating at variable operation conditions. The method consists in determining the optimal values of limit transient probabilities at the system operation states that maximize the system lifetimes in the reliability state subsets. The proposed method is practically applied to the operation and reliability optimization of the considered exemplary complex system. [full text]

Kosmowski Kazimierz T.
Towards systemic functional safety and security management in hazardous plants

The aim of this article is to identify and discuss some issues related to functional safety and security management in hazardous industrial plants. The safety functions are to be realised using the electric / electronic / programmable electronic systems (E/E/PESs) or the safety instrumented systems (SISs) that are designed and operated respectively according to IEC 61508 and IEC 61511 requirements in life cycle. Although the role of functional safety solutions in effective reducing and controlling the individual and/or societal risks has been widely recognised, the substantial problems emerge when E/E/PEs or SISs operate in industrial distributed computer networks. Thus, the security-related problems appear that can introduce some additional risks. An integrated systemic functional safety and security concept is proposed, which includes general requirements as well as appropriate using specified methods and international standards.[full text]

Krośnicka Karolina, Smolarek Leszek
Determinants of cargo flow modeling in container terminals in conditions of „extended pre–gate”
The paper considers determinants of construction of the mathematical model describing in a macro scale a stream of cargo, flowing through a container terminal equipped with an extended pre-gate. Accordingly, the work analyzes the handling points and channels of container’s flows at a hypothetical terminal, as well as opportunities allowing to increase the flow’s efficiency by changing the random stream of arriving trucks and trains into the determined one.[full text]

Kuligowska Ewa
Analysis of system operation process influence on its reliability
The paper presents analytical and Monte Carlo simulation methods applied to the reliability evaluation of a system operating in two different operation states. A semi-Markov process is applied to construct the system operation model and its main characteristics are determined. Analytical linking of this operation model with the system reliability model is proposed to get a general reliability model of the system operating at two varying in time operation conditions and to find its reliability characteristics. The application of Monte Carlo simulation based on this general model to the reliability evaluation of this system is proposed as well. The exemplary results obtained from those two considered methods are illustrated.[full text]

Porzeziński Michał
The methods of secure data transmission in the KNX system
The article presents the demands concerning data security in distributed building automation systems and shows the need for providing additional mechanisms of secure communication in the KNX system. Three different methods developed for KNX data protection are discussed: EIBsec, KNX Data Security and the author’s method. Their properties are compared and potential areas of application are presented.[full text]

Tchórzewska-Cieślak Barbara, Piegdoń Izabela, Szpak Dawid
Water supply of urban agglomeration in crisis situation
The study characterized the main aspects of managing collective water supply system (CWSS) in a crisis situation. Examples of crisis situations in the world associated with the lack of drinking water were discussed. The method of analysis and assessment the risk of lack of water supply in a crisis situation was presented. An example of practical application of the discussed analysis determining the risk of lack of water supply for a city located in southeastern Poland was presented. Calculations were performed for three variants: proper functioning state and two for functioning in crisis situations.[full text]