The decomposition of martensite during tempering or ageing is an important phenomenon as it leads to changes in the mechanical properties. These changes could take place during both steel manufacturing or in-service. Thus, their understanding is required to predict the material performance. Recent advances in the development of local electrode atom probes has led to a significant increase in th...

Distributed Denial of Service (DDoS) attacks are security attacks that prevent normal use of communication facilities. More and more DDoS attacks are occurring each day. Conventional DDoS attacks are typically based on flooding the server. Currently, other types of DDoS attacks have been observed, such as the mimicry DDoS attack. The mimicry attack is characterized by (1) gradual increase in th...

Queueing networks have been used to model the performance of a variety of complex systems, however, exact results exist for a limited class of networks. The methodology that has been used extensively to analyse networks of queues is the decomposition approach. In this paper, we consider open queueing networks with multiple product classes, deterministic routings and general arrival and service ...

In this paper we develop a novel single-link multiple-classes-of-service framework where offered prices and QoS are allowed to be actively modified by the provider, depending on the demand and the congestion of the system. We obtain a solution to the problem using dynamic programming. The obtained solution is then extended to a network environment using a decomposition approach. The decompositi...

Most available aspect-oriented languages today are extensions to programming languages. However, aspect-orientation, which is a paradigm for decomposition and modularization, is not only applicable in that context. In this paper, we introduce aspect-oriented software development concepts to workflow languages in order to improve the modularity of workflow process specifications with respect to ...

We study a project scheduling problem at a large IT services delivery center in which there are unpredictable delays. We apply robust optimization to minimize tardiness while informing the customer of a reasonable worst-case completion time. Due to the impracticality of quantifying joint probability distributions for delay times, we follow the recent practice of using empirically determined unc...

The problem of filtering low-frequency trend from a given time series is considered. In order to solve this problem, a nonparametric technique called empirical mode decomposition trend filtering is developed. A key assumption is that the trend is representable as the sum of intrinsic mode functions produced by the empirical mode decomposition (EMD) of the time series. Based on an empirical anal...

A new scheme for robust, high-quality, embedded speech coding based on subband decomposition and perceptually optimized bit allocation and prioritization is presented. An infinte impulse response (IIR) quadrature mirror filterbank (QMF) performs subband decomposition. A perceptual model, computed using subband spectral analysis, optimizes the coder’s perceptual quality. Dynamic bit allocation a...

In this paper, the information theoretic principle of Minimum Relative Entropy (MRE), given fully decomposable subset and aggregate mean value constraints, is applied, in conduction with classical queueing theory, to extend earlier works and derive new analytic approximations for the conditional and marginal state probabilities of arbitrary closed queueing network models (QNMs-B) with Generalis...

decomposability of an algebraic structure into the :union: of its sub-structures goes back to g. scorza's theorem of 1926 for groups. an analogue of this theorem for rings has been recently studied by a. lucchini in 2012. on the study of this problem for non-group semigroups, the first attempt is due to clifford's work of 1961 for the regular semigroups. since then, n.p. mukherjee in ...