Dynamically composed systems (DCSs) are software systems that can be constructed, modified and maintained as they execute. Although this capability has existed in languages and operating systems for some time, it has more recently become popular with the spread of languages such as Java and those supporting mobile code. However, the increasing pervasiveness of dynamically composed systems has n...

Fire is always a severe threat to ship safety and survival. To prevent the spread of a fire and eliminate serious accidental consequences, it is imperative for commanders to promptly identify the size and type of the fire so as to take rapid and effective firefighting action. In this study, the architectural design of an advanced ship fire identification system (SFIS) is presented that makes ti...

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An energy-balanced multiple-sensor collaborative scheduling is proposed for maneuvering target tracking in wireless sensor networks (WSNs). According to the position of the maneuvering target, some sensor nodes in WSNs are awakened to form a sensor cluster for target tracking collaboratively. In the cluster, the cluster head node is selected to implement tracking task with changed sampling inte...

We report absolute differential cross sections (DCSs) for elastic electron scattering from OCS (carbonyl sulphide) and CS(2) (carbon disulphide) in the impact energy range of 1.2-200 eV and for scattering angles from 10° to 150°. Above 10 eV, the angular distributions are found to agree quite well with our present calculations using two semi-phenomenological theoretical approaches. One employs ...

We have measured differential cross sections (DCSs) for the vibrationally inelastic scattering process H + o-D(2)(v = 0, j = 0,2) --> H + o-D(2)(v' = 1-4, j' even). Several different collision energies and nearly the entire range of populated product quantum states are studied. The products are dominantly forward-scattered in all cases. This behavior is the opposite of what is predicted by the ...

We report differential cross sections (DCSs) and integral cross sections (ICSs) for electron-impact vibrational-excitation of pyrimidine, at incident electron energies in the range 15-50 eV. The scattered electron angular range for the DCS measurements was 15°-90°. The measurements at the DCS-level are the first to be reported for vibrational-excitation in pyrimidine via electron impact, while ...

The ability to model and optimize reliability is central in designing survivable distributed computing systems (DCSs) where servers are prone to fail permanently. In this paper the service reliability of a DCS in uncertain topologies is analytically characterized by using a novel regeneration-based probabilistic analysis. The analysis takes into account the stochastic failure times of servers, ...

The growing dependence of critical infrastructures and industrial automation on interconnected physical and cyber-based control systems has resulted in a growing and previously unforeseen cyber security threat to supervisory control and data acquisition (SCADA) and distributed control systems (DCSs). It is critical that engineers and managers understand these issues and know how to locate the i...