Anonymous message transmission systems are the building blocks of several high-level anonymity services (e.g. epayment, e-voting). Therefore, it is essential to give a theoretically based but also practically usable objective numerical measure for the provided level of anonymity. In this paper two entropybased anonymity measures will be analyzed and some shortcomings of these methods will be hi...

Knuth (1973,pp2-3) notes that sorting is estimated to take up 25% of the world’s computer time. With the advent of the microcomputer this may well have changed, but it is nonetheless a both practically and theoretically interesting task. Sorting, in the sense of bringing together related things, has now been subsumed by.the more specific task of ordering, and has spawned an enormous number of s...

Over the past 15 yr, an international network of researchers has developed and tested a methodology for integrating complex systems theories into sustainable development projects. Drawing on our best theoretical understanding of complex systems and combining it with best practices of community engagement drawn from a wide variety of sources, we have developed a methodology that is theoretically...

Study of conflicts is of greatest importance both practically and theoretically. Conflict analysis and resolution play an important role in business, governmental, political and lawsuits disputes, labor-management negotiations, military operations and others. Many formal models of conflict situations have been proposed and studied. In this paper we outline a new approach to conflict analysis, w...

In this article, we introduce the notion of cycling operations of arbitrary order in Garside groups, which is a full generalization of the cycling and decycling operations. Theoretically, this notion together with other related concepts provides a context in which various definitions and arguments concerning Garside groups are unified and simplified as well as improved. Practically, it yields a...

Since most of the practical combustion devices operate in turbulent environments, study of turbulent combustion is fundamentally appealing and practically important. Turbulence enhances the flame propagation by wrinkling an otherwise laminar smooth flame, leading to an increase in the flame surface area and hence the total burning rate. There have been number of studies performed to achieve a s...

Non-periodic systems have become more important in recent years, both theoretically and practically. Their description via Delone sets requires the extension of many standard concepts of crystallography. Here, we summarise some useful notions of symmetry and aperiodicity, with special focus on the concept of the hull of a Delone set. Our aim is to contribute to a more systematic and consistent ...

A case of ankylosing spondylitis with aortic valve disease and hearing loss is described. A series of radiographic and audiometric investigations showed the hearing loss to be of a conductive type. It seemed most likely that the hearing loss was related to an inflammatory involvement of the ossicular joints due to the primary disease. No other case of conductive hearing loss has previously been...

Though integer factorization and discrete logarithm problem are both practically and theoretically important, the computational complexity of these problems remained unknown. By comparing integer factorization problem with a problem in P and NP-complete problems, I show that the decision problem version of integer factorization problem is neither in P nor NP-complete. In addition, integer facto...

Recently Kojima and Tun cel proposed new successive convex relaxation methods and their localized-discretized variants for general nonconvex quadratic programs. Although an upper bound of the objective function value within a prior precision can be found theoretically by solving a nite number of linear programs, several important implementation problems remain unsolved. In this paper we discuss...