Linfieldpdx, Fall 2008

Linfieldpdx, an annual newsletter for Linfield College\u27s nursing and health sciences alumni and friends, features stories about alumni, the campus, and programs. Included in this issue: notes from the Director, Chair, and Dean Simlab campus new

The neighborhood complex of a random graph

For a graph G, the neighborhood complex N[G] is the simplicial complex having all subsets of vertices with a common neighbor as its faces. It is a well known result of Lovasz that if N[G] is k-connected, then the chromatic number of G is at least k + 3. We prove that the connectivity of the neighborhood complex of a random graph is tightly concentrated, almost always between 1/2 and 2/3 of the expected clique number. We also show that the number of dimensions of nontrivial homology is almost always small, O(log d), compared to the expected dimension d of the complex itself.Comment: 9 pages; stated theorems more clearly and slightly generalized, and fixed one or two typo

Topology of random simplicial complexes: a survey

This expository article is based on a lecture from the Stanford Symposium on Algebraic Topology: Application and New Directions, held in honor of Gunnar Carlsson, Ralph Cohen, and Ib Madsen.Comment: After revisions, now 21 pages, 5 figure

Linfieldpdx, 2011

Linfieldpdx, an annual newsletter for Linfield College\u27s nursing and health sciences alumni and friends, features stories about alumni, the campus, and programs. Included in this issue: notes from the Dean nursing meets cyclo-cross new faces around campus alumni residents at Legacy Lloydena V. Grimes award why scholarships matte

Linfieldpdx, 2010

Linfieldpdx, an annual newsletter for Linfield College\u27s nursing and health sciences alumni and friends, features stories about alumni, the campus, and programs. Included in this issue: a column from the interim director global health viewpoints campus new

Power Converters and Power Quality

This paper discusses the subject of power quality for power converters. The first part gives an overview of most of the common disturbances and power quality issues in electrical networks for particle accelerators, and explains their consequences for accelerator operation. The propagation of asymmetrical network disturbances into a network is analysed. Quantitative parameters for network disturbances in a typical network are presented, and immunity levels for users' electrical equipment are proposed. The second part of this paper discusses the technologies and strategies used in particle accelerator networks for power quality improvement. Particular focus is given to networks supplying loads with cycling active and reactive power.Comment: 26 pages, contribution to the 2014 CAS - CERN Accelerator School: Power Converters, Baden, Switzerland, 7-14 May 201