must be profitable. But how profitable and how successful spam campaigns are has not been quantitatively measured. One reason that this has yet to have been studied is that designing a methodology for the inquiry into the strategies and success of spammers has presented a number of knotty problems for researchers. But in a bold move, CNS faculty researchers Geoffrey Voelker and Stefan Savage (p...

We introduce and discuss the Homotopy perturbation method, the Adomian decomposition method and the variational iteration method for solving the stefan problem with kinetics. Then, we give an example of the stefan problem with  kinetics and solve it by these methods.

In this study, a mathematical model is introduced to simulate the coupled heat transfer equation and Stefan condition occurring in moving boundary problems such as the solidification process in the continuous casting machines. In the continuous casting process, there exists a two-phase Stefan problem with moving boundary. The control-volume finite difference approach together with the boundary ...

we introduce and discuss the homotopy perturbation method, the adomian decomposition method and the variational iteration method for solving the stefan problem with kinetics. then, we give an example of the stefan problem with  kinetics and solve it by these methods.

Brent Hoon (Brent ByungHoon Kang, UNC at Charlotte) said that although Conficker had been contained (by buying up the domain names to be used in C&C) in 2009, Conficker has never disappeared. They are still seeing hits, and there appear to be about six million IP addresses that show signs of infection. Stefan Savage wondered how you could economically get patches to six million people. Someone ...

References: 1) Husain Aljazzar and Stefan Leue: Debugging of Dependability Models Using Interactive Visualization of Counterexamples, to appear in proceedings of QEST 2008. 2) Husain Aljazzar and Stefan Leue: Directed explicit state-space search in the generation of counterexamples for probabilistic reachability, 2008, submitted for journal publication. 3) Husain Aljazzar and Stefan Leue: Count...

Department for Geoand Environmental Sciences, GeobioCenter and Center for Nanoscience, Ludwig-Maximilians-Universität, Theresienstrasse 41, 80333 München, Germany *E-mail: [email protected] URL: www.nanobiomed.de Over the last 15 years, the use of atomic force microscopy (AFM) has spread from the materials science of hard matter to the fields of biology and biomolecular research....

The best stage in a scientist s career is ... when they can still do chemistry in the lab with their own hands. The biggest problem that scientists face is ...—sadly enough—to focus on science. The best advice I have ever been given is ... not to get frustrated over problems but to come up with respective solutions (J. M. J. Fr chet). A good work day begins with ... breakfast with the family, r...

The Mechanization of the Mind: On the Origins of of modelling and scientific explanation, the physics Cognitive Science, Jean-Pierre Dupuy, translated by of dissipative processes, aspects of neurophysiology M.B. DeBevoise, Princeton University Press, 2000, and embryology, and more, all without once trivializ$29.95 / £19.95, 240 pp. ISBN: 0-691-02574-6 ing his subject or falling victim to the us...

In the following, I will outline some implications of the Cologne program of “interactive constructivism” (founded by Kersten Reich) 1 for educational theory. I will proceed in three steps. In an introductory section, I will first briefly locate the Cologne program within the context of the so called „cultural turn“ in recent constructivist discourses. Secondly, I will introduce some main theor...