$EVWUDFW This paper describes a methodology to detect the emergence (or the disappearance) of concepts through the observation of natural language communications (NLC). NLC are the documents, e-mails, written communications of any kind, that the members of a web community produce, access, and exchange for their purposes. The emergence of a new concept is suggested by the repetitive and consiste...

Through fitting to numerical results we obtain a simple model for the transverse short-range wakefield of a linear accelerator structure over a parameter range useful for the NLC. SLAC-PUB-9663 LCC-0116 Short-range dipole wakefields in accelerating structures for the NLC Karl L.F. Bane∗ Stanford Linear Accelerator Center, Stanford University, Stanford, CA 94309 (Dated: March 4, 2003) ∗Work supp...

As the largest library in China, the National Library of China (NLC) has spent more than 20 years in automating its processes, and has not yet had an integrated library management system, lagging behind libraries of developed countries and also other major libraries in China. In the 1980s and 1990s the NLC made slow progress; reasons for lack of success in the past include the inadequacy of bud...

In this paper we consider a connection between switching (of undirected graphs), and the notions of NLC-width, cliquewidth and treewidth. In particular, we show that the NLC-widths and the cliquewidths of two graphs in a switching class are at most a constant factor apart (2 for the former, 4 for the latter). A similar result can be shown not to hold for treewidth: it is easy to find a switchin...

This is a preliminary study of the e ect of using microwave quads (MQ's) instead of rf phase shifting to induce BNS damping in the main linac of the NLC collider. We consider MQ's running at Xband, and nd that the total length of MQ's needed for the NLC is 6% of the total length of the accelerating structures. We show through simulations that, by using MQ's instead of phase shifting for BNS dam...

In the Next Linear Collider (NLC), the high power rf components must be capable of handling peak rf power levels in excess of 600 MW. In the current view of the NLC, even the rectangular waveguide components must transmit at least 300 MW rf power. At this power level, peak rf fields can greatly exceed 100 MV/m. We present recent results of high power tests performed at the Accelerator Structure...

We consider a mathematical model that describes the flow of Nematic Liquid Crystal (NLC) film placed on flat substrate, across which spatially-varying electric potential is applied. Due to their polar nature, NLC molecules interact with (nonuniform) field generated, leading instability film. Implementation long wave scaling leads partial differential equation predicts subsequent time evolution ...

As part of the vibration budget study for the NLC Main Linac components, the vibration sources in the NLC modules (Girder) are under investigation. The activity is focused on the effect of cooling water flow on the structures (FXB type) stability, the transmission of vibrations to the adjacent components, and the effect of different materials of construction used for the supports. Experimental ...

A planar nematic liquid crystal (NLC) cell is incorporated into a Littman-type external cavity as the wavelength-tuning device for a semiconductor laser diode. By varying the driving voltage of the NLC cell and laser diode bias current simultaneously, we demonstrate single-mode oscillation and mode-hop-free tuning over 19.2 GHz at 775 nm. The result is in good agreement with the theoretical pre...