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Social influence in online social networks bears resemblance to epidemic spread in networks and has been studied through epidemiological models. The epidemic threshold is a fundamental metric used to evaluate epidemic spread in networks. Previous work has shown that the epidemic threshold of a network is exactly the inverse of the largest eigenvalue of its adjacency matrix. In this work, however,...
The best design among many can be selected through their accurate performance evaluation. When such evaluation is based on discrete event simulations, the design selection is extremely time-consuming. Ordinal optimization greatly speeds up this process. Optimal Computing-Budget Allocation (OCBA) has further accelerated it. Other kinds of OCBA have been introduced for reaching different goals, for...
In wireless sensor networks, a few sensor nodes end up being vulnerable to potentially rapid depletion of the battery reserves due to either their central location or just the traffic patterns generated by the application. In this paper, we use a new approach that balances the energy consumption at each of the nodes, thus increasing the functional lifetime of the network. We propose a new distributed...
The idea of composite cloud service has been emerging to reduce negative impact of cloud bursting. The novel idea of composite cloud services is achieved by forming a dynamic cloud collaboration platform among cloud providers. An important prerequisite of dynamic collaborative cloud formation is to reduce the cost of infrastructure and prevent loss to business enterprises owing to cloud bursting....
The interfacial layers of high dielectric constant (high - k) nanolaminate films are here explored. Problems concerning ALD nanolaminate layers deals mainly with lack of accurate methods to determine in depth profile of few nm thick stacks. Angle Dependent XPS (ADXPS) is proposed as method suitable in layer profiling. Studied stacks containing industrial grown ZrO2/HfO2 films( d~3 nm) were processed...
Atomic-scale computational materials engineering offers an exciting complement to experimental observations, revealing critical materials property data, and providing understanding which can form the basis for innovation. This contribution reviews the current state of atomic-scale simulations and their capabilities to predict mechanical, thermal, and electric properties of microelectronics materials...
In this paper, we propose a robust STBC transmission scheme to combat the timing synchronization errors over frequency-selective multiple-access channels. First, the equivalent channel model in the presence of timing synchronization errors is derived and we find that the synchronization errors result in an equivalent channel model with larger number of correlated channel taps. Based on this correlated...
We present techniques for parallel divide-and-conquer, resulting in improved parallel algorithms for a number of problems. The problems for which we give improved algorithms include intersection detection, trapezoidal decomposition (hence, polygon triangulation), and planar point location (hence, Voronoi diagram construction). We also give efficient parallel algorithms for fractional cascading, 3-dimensional...
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