We describe the commissioning of the high-power RF stations for the PEP-II B factory. This includes in-situ testing and conditioning of components after installation, phasing of cavities within each station and between stations in each ring, capture of fist beam, stored-beam operation at lowand moderatecurrent, commissioning of feedback loops, and high-current operation. Performance of the over...

The main result of this paper is a proof of the following conjecture of Babson & Kozlov: Theorem. Let G be a graph of maximal valency d, then the complex Hom (G, Kn) is k-connected, whenever n ≥ d + k + 2. Here Hom (−,−) denotes the polyhedral complex introduced by Lovász to study the topological lower bounds for chromatic numbers of graphs. We will also prove, as a corollary to the main theore...

The first generation of strongly HOM-damped RF cavities are now being operated with beam in accelerators with good success. We briefly review these designs and consider some factors in the design of a second generation HOM damped copper RF cavity suitable for use in high current storage rings such as linear collider damping rings, light sources and high luminosity colliders. We consider the pro...

We model physical systems with \hard constraints" by the space Hom(G;H) of homomorphisms from a locally nite graph G to a xed nite constraint graph H. For any assignment of positive real activities to the nodes of H, there is at least one Gibbs measure on Hom(G;H); when G is in nite, there may be more than one. When G is a regular tree, the simple, invariant Gibbs measures on Hom(G;H) correspon...

-Effectiveness means how good a test case is in finding faults. Traditional mutation testing considers First Order Mutants (FOM) created by injection of a single fault. We focus on Higher Order Mutants (HOM) and in particular on subsuming HOM. Higher Order Mutants contain more than one fault. We report in this paper that a strongly subsuming HOM is more effective as it kills all the FOM’s from ...

For a compact Riemann surface X of genus g > 1, Hom(π1(X),U(p, 1))/U(p, 1) is the moduli space of flat U(p, 1)connections on X . There is an integer invariant, τ , the Toledo invariant associated with each element in Hom(π1(X),U(p, 1))/U(p, 1). If q = 1, then −2(g − 1) ≤ τ ≤ 2(g − 1). This paper shows that Hom(π1(X),U(p, 1))/U(p, 1) has one connected component corresponding to each τ ∈ 2Z with ...

This article is concerned with conjugacy problems arising in homeomorphisms group, Hom(F ), of non-compact subsets F of normed vector spaces E. Given two homeomorphisms f and g in Hom(F ), it is shown how the existence of a conjugacy may be related to the existence of a common generalized eigenfunction of the associated Koopman operators. This common eigenfunction serves to build a topology on ...

We report the discovery with the Ulysses unified radio and plasma wave (URAP) instrument of features in the Jovian hectometer (HOM) wavelength radio emission spectrum which recur with a period about 2-4% longer than the Jovian System III rotation period. We conclude that the auroral HOM emissions are periodically blocked from "view" by regions in the torus of higher than average density and tha...

Goeie kommunikasie is die hoeksteen van die verpleegberoep. Aan die hand van gevalle illustreer die skrywer dat die kind veral gevoelig is vir ’n gebrek aan kommunikasie en dat 'n spesiale poging dus aangewend moet word. Hospitalisasie en veral die skeiding van sy moeder het ’n intense invloed op die kind en sy reaksies hang van verskeie faktore af. Om te voorkom dat die hospitaalervaring horn ...