For synchrotron light sources and for damping rings of linear colliders it is important to be able to minimze the vertical emittance and to correct the spurious vertical dispersion. This allows one to maximize the brightness and/or the luminosity. A commonly used tool to measure the skew error distribution is the analysis of orbit response matrices using codes like LOCO. Using the new Matlab ve...

A comprehensive description of methods, suitable for solving the kinetic equation for fast ions and impurity species in tokamak plasmas using Monte Carlo approach, is presented. The described methods include Hamiltonian orbit-following in particle and guiding center phase space, test particle or guiding center solution of the kinetic equation applying stochastic differential equations in the pr...

This paper evaluates the proposed implementation of short length low density parity check (LDPC) codes within the telemetry space protocol. Due to the varying orbital patterns of low earth orbit (LEO) satellites, limited communication time windows need to be optimised to maximise data throughput. Most popular connection oriented protocols focus on correcting congestion related link errors, but ...

An infinite word, which is aperiodic and codes the orbit of a transformation of the exchange of three intervals is called 3iet word. Such a word is thus a natural generalization of a sturmian word to a word over 3-letter alphabet. A morphism is said to be 3iet preserving if it maps any 3iet word to another 3iet word. It is known that the monoid of morphisms preserving sturmian words is finitely...

the present paper aims to study the iranian-made movie “aroos-e-atash” (the bride of fire), using semiotic methodology at the three following levels: description (social codes), representation (technical codes) and ideology (ideological codes). the process of interconnections and interactions between these three types of codes resulted in these findings: although the movie enjoys an emancipatio...

A theoretical investigation into density, pressure, and temperature distributions in magneto-optical traps is presented. After a brief overview of the forces that arise from reradiation and absorption, a condition that the absorptive force be conservative is used to show that, if the temperature is uniform throughout the trap, any density solutions to the force equations will not be physical. F...

Numerical relativity codes now being developed will evolve initial data representing colliding black holes at a relatively late stage in the collision. The choice of initial data used for code development has been made on the basis of mathematical definitiveness and usefulness for computational implementation. By using the “particle limit” (the limit of an extreme ratio of masses of colliding h...

For some modern particle accelerators, including the planned muon collider, the accurate analysis of non-linear time-of-#ight e!ects in the form of momentum compactions is critical for the preservation of bunch structure. A Di!erential Algebra-based (DA) method is presented that allows the determination of o!-energy closed orbits and chromaticities to any order. By performing a coordinate trans...

We study the action of a finite group on the Riemann-Roch space of certain divisors on a curve. If G is a finite subgroup of the automorphism group of a projective curve X over an algebraically closed field and D is a divisor on X left stable by G then we show the irreducible constituents of the natural representation of G on the Riemann-Roch space L(D) = LX(D) are of dimension ≤ d, where d is ...