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Philipp Pluch

Publications and source records attributed to Philipp Pluch.

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Bayesian Network Tomography and Inference

The aim of this technical report is to give a short overview of known techniques for network tomography (introduced in the paper of Vardi (1996)), extended by a Bayesian approach originating Tebaldi and West (1998). Since the studies of A.K. Erlang (1878-1929) on telephone networks in the last millennium, lots of needs are seen in todays applications of networks and network tomography, so for instance networks are a critical component of the information structure supporting finance, commerce and even civil and national defence. An attack on a network can be performed as an intrusion in the network or as sending a lot of fault information and disturbing the network flow. Such attacks can be detected by modelling the traffic flows in a network, by counting the source destination packets and even by measuring counts over time and by drawing a comparison with this 'time series' for instance.

cs.NI

Quantum Mechanics: Bell and Quantum Entropy for the Classroom

In this article we are willing to give some first steps to quantum mechanics and a motivation of quantum mechanics and its interpretation for undergraduate students not from physics. After a short historical review in the development we discuss philosophical, physical and mathematical interpretation. We define local realism, locality and hidden variable theory which ends up in the EPR paradox, a place where questions on completeness and reality comes into play. The fundamental result of the last century was maybe Bell's that states that local realism is false if quantum mechanics is true. From this fact we can obtain the so called Bell inequalities. After a didactic example of the fact what these inequalities means we describe the key concept of quantum entanglement motivated here by quantum information theory. Also classical entropy and von Neuman entropy is discussed.

physics.hist-ph