Wireless Sensor Networks (WSNs) when combined with various energy harvesting solutions managing to prolong the overall lifetime of the system and enhanced capabilities of the communication protocols used by modern sen...
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Wireless Sensor Networks (WSNs) when combined with various energy harvesting solutions managing to prolong the overall lifetime of the system and enhanced capabilities of the communication protocols used by modern sensor nodes are efficiently used in are efficiently used in Smart Grid (SG), an evolutionary system for the modernization of existing power grids. However, wireless communication technology brings various types of security threats. In this study, firstly the use of WSNs for SG applications is presented. Second, the security related issues and challenges as well as the security threats are presented. In addition, proposed security mechanisms for WSN-based SG applications are discussed. Finally, an easy-to-implement and simple attack detection framework to prevent attacks directed to sink and gateway nodes with web interfaces is proposed and its efficiency is proved using a case study.
In this paper we tackle the problem of verifying whether a scenario is executable in a Petri net. In contrast to sequentially ordered runs, a scenario includes both information about dependencies and independencies of...
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In this paper we tackle the problem of verifying whether a scenario is executable in a Petri net. In contrast to sequentially ordered runs, a scenario includes both information about dependencies and independencies of events. Consequently, a scenario allows a precise and intuitive specification of a run of a concurrent or distributed system. In this paper we consider Petri nets with arc weights, namely marked place/transition-nets (p/t-nets) and p/t-nets with inhibitor arcs (pti-nets). A scenario of a p/t-net is a labelled partial order (lpo). A scenario of a pti-net is a labelled stratified order structure (lso). Accordingly, the question is either whether a given lpo is in the language of a given p/t-net or whether an lso is in the language of a given pti-net. Different approaches exist to define the partial language of a Petri net. Each definition yields a different verification algorithm, but existing algorithms perform quite poorly in terms of runtime for most examples. We introduce a new compact characterization of the partial language of a Petri net. This characterization is optimized with respect to the verification problem. The paper is a revised and extended version of the conference paper [10].
Approach is offered to the formal specification of Standard Life Cycle (LC) of the program systems (PS) by the ontology facilities with purpose automation and generation of the variants LC for making the appropriate k...
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ISBN:
(纸本)9781479985470
Approach is offered to the formal specification of Standard Life Cycle (LC) of the program systems (PS) by the ontology facilities with purpose automation and generation of the variants LC for making the appropriate kinds process for development different PS. Ontological approach to presentation LC model of the standard ISO/IEC 12207-2007 is included the specification of general, organizational and support processes. These processes are presented in the subject-oriented DSL, which than transformed to XML for realization. One of the processes, the testing process is given in terms of Protege systems. An eventual result of this system Protege got generally at accepted to the XML, suitable for implementation tasks testing PS on computer.
Coping with evolution in automated production systems implies cross-disciplinary challenges along the system's life-cycle for variant-rich systems of high complexity. We provide an interdisciplinary survey on chal...
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ISBN:
(纸本)9783885796466
Coping with evolution in automated production systems implies cross-disciplinary challenges along the system's life-cycle for variant-rich systems of high complexity. We provide an interdisciplinary survey on challenges and research directions in the evolution of automated production systems. After an initial discussion about the nature of automated production systems and their specific development process, we sketch in this extended abstract the challenges associated with evolution in the different development phases and a couple of cross-cutting areas.
If there is suspicion of Lyme disease, a doctor sends a blood sample of the patient to a medical laboratory. The laboratory performs a number of different blood examinations, testing for antibodies against the Lyme di...
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This paper presents compact regions to synthesize a Petri net from a partial language. We synthesize a Petri net using the theory of regions. Let there be a partial language, every region definition provides an inequa...
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This paper presents compact regions to synthesize a Petri net from a partial language. We synthesize a Petri net using the theory of regions. Let there be a partial language, every region definition provides an inequality system and a solution of this system is called a region. Every region defines a valid place where a place is valid if it enables every word of the partial language. The new compact region definition relies on compact tokenflows. Compact tokenflows are a very efficient behavioral model for the partial language of Petri nets [3, 4]. Compact regions will lead to faster synthesis algorithms computing smaller Petri nets solving the synthesis problem.
Nowadays, the staff of modern operation rooms (ORs) and intensive care units (ICUs) has to handle increasingly complex medical devices and their user interfaces. Inconsistent and often non-sterile user interfaces lead...
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ISBN:
(纸本)9781509011674
Nowadays, the staff of modern operation rooms (ORs) and intensive care units (ICUs) has to handle increasingly complex medical devices and their user interfaces. Inconsistent and often non-sterile user interfaces lead to error-prone and slow reconfiguring actions which in the end may even harm the patient. To overcome these issues interconnected medical devices are necessary. We introduce a new concept for flexible and easy-to-use remote controls which allow to control a range of different devices from different manufacturers. Current solutions are vendor-, and mostly even device-specific and tightly coupled. The effort for manufacturers is high and the maintainability is bad. Thus, controls that can be assigned dynamically to different medical devices are rare or mostly not available. Yet such dynamic controls are badly needed to improve clinical workflows especially in ORs and ICUs. We establish such a remote control setup using the service-oriented architecture defined in the IEEE 11073 SDC standards family. The presented concept is based on dynamic service orchestration to overcome existing problems: The control device and the controlled medical device are published as independent services in the network and an additional composed service interconnects them. We successfully implemented this concept for dynamically assignable controls in a real-world demonstrator with several medical devices from more than five different manufacturers. Performance evaluations show its practicability.
The functional and the algebraic routing problem are generalizations of the shortest path problem. This paper shows that both problems are equivalent with respect to the concept of profile searches known from time-dep...
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ISBN:
(纸本)9781577357384
The functional and the algebraic routing problem are generalizations of the shortest path problem. This paper shows that both problems are equivalent with respect to the concept of profile searches known from time-dependent routing. Because of this, it is possible to apply various shortest path algorithms to these routing problems. This is demonstrated using contraction hierarchies as an example. Furthermore, we show how to use Cousots' concept of abstract interpretation on these routing problems generalizing the idea of routing approximations, which can be used to find approximative solutions and even to improve the performance of exact queries. The focus of this paper lies on vehicle routing while both the functional and algebraic routing models were introduced in the context of internet routing. Due to our formal combination of both fields, new algorithms abound for various specialized vehicle routing problems. We consider two major examples, namely the time-dependent routing problem for public transportation and the energy-efficient routing problem for electric vehicles.
The analysis of nowadays software systems for supporting, e.g., testing, verification or debugging is becoming more challenging due to their increasing complexity. Model slicing is a promising analysis technique to ta...
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ISBN:
(纸本)9781479984695
The analysis of nowadays software systems for supporting, e.g., testing, verification or debugging is becoming more challenging due to their increasing complexity. Model slicing is a promising analysis technique to tackle this issue by abstracting from those parts not influencing the current point of interest. In the context of software product lines, applying model slicing separately for each variant is in general infeasible. Delta modeling allows exploiting the explicit specification of commonality and variability within deltas and enables the reuse of artifacts and already obtained results to reduce the modeling and analysis efforts. In this paper, we propose a novel approach for incremental model slicing for delta-oriented software product lines. Based on the specification of model changes between variants by means of model regression deltas, an incremental adaptation of variant-specific dependency graphs as well as an incremental slice computation is achieved. The slice computation further allows for the derivation of differences between slices for the same point of interest enhancing, e.g., change impact analysis. We provide details of our incremental approach, discuss benefits and present future work.
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