regional scenario of global suicide .......... ijmtfm (2011) 1(1): 6-11

# a 6 Integers 11 B ( 2011 ) Degrees of Streams

We introduce a novel approach to comparing the complexity of streams, namely in terms of reducibility by finite state transducers. This gives rise to a hierarchy of stream ‘degrees,’ somewhat analogous to the recursion-theoretic degrees of unsolvability. It is the structure and properties of this partial order of degrees that we are primarily interested in. Remarkably, in spite of its simplicit...

A 11 Integers 11 B ( 2011 ) Dynamical Zeta Functions

These notes are a rather subjective account of the theory of dynamical zeta functions. They correspond to three lectures presented by the author at the “Numeration” meeting in Leiden in 2010. 1 A Selection of Zeta Functions In its various manifestations, a zeta function ζ(s) is usually a function of a complex variable s ∈ C. We will concentrate on three main types of zeta function, arising in t...

# a 7 Integers 11 ( 2011 )

Independently, Pirillo and Varricchio, Halbeisen and Hungerbühler and Freedman considered the following problem, open since 1992: Does there exist an infinite word w over a finite subset of Z such that w contains no two consecutive blocks of the same length and sum? We consider some variations on this problem in the light of van der Waerden’s theorem on arithmetic progressions.

Cbn 11-6

We analyze properties of electromagnetic radiation in helical undulators with a particular emphasis on the orbital angular momentum of the radiated photons. We demonstrate that all harmonics higher than the first one radiated in a helical undulator carry an orbital angular momentum. We discuss some possible applications of this phenomenon and the ways of effective generation of these photons in...

Japanese Nuclear Energy after March 11 , 2011

Septembre 2011 Université Paris - sud 11

15 Synthèse 17 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 Etude de sensibilité . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 Etalonnage des calorimètres . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 Première mesure de physique avec les données 2010 . . . . . . . . . . . . . . . . . ....