scholarly journals airConn: A framework for tiered services in public wireless LAN hot spots

2004 ◽  
Vol 42 (9) ◽  
pp. 124-132
Author(s):  
A. Acharya ◽  
C. Bisdikian ◽  
A. Misra ◽  
Young-Bae Ko
Keyword(s):  
Hot Spots ◽  
Wireless Lan ◽  
Tiered Services

Virtual operator based AAA in wireless LAN hot spots with ad-hoc networking support

2002 ◽  
Vol 6 (3) ◽  
pp. 10-21 ◽  
Author(s):  
Junbiao Zhang ◽  
Jun Li ◽  
Stephen Weinstein ◽  
Nan Tu
Keyword(s):  
Hot Spots ◽  
Wireless Lan ◽  
Ad Hoc ◽  
Ad Hoc Networking ◽  
Virtual Operator

A high-performance oil-free backing pump for electron microscopes

1978 ◽  
Vol 36 (1) ◽  
pp. 110-111
Author(s):  
G.K.W. Balkau ◽  
E. Bez ◽  
J.L. Farrant
Keyword(s):  
Molecular Weight ◽  
Electron Microscope ◽  
Hot Spots ◽  
High Performance ◽  
Carbonaceous Material ◽  
Contamination Rate ◽  
Low Molecular Weight ◽  
Principal Source ◽  
Rotary Pumps ◽  
Electron Microscopes

The earliest account of the contamination of electron microscope specimens by the deposition of carbonaceous material during electron irradiation was published in 1947 by Watson who was then working in Canada. It was soon established that this carbonaceous material is formed from organic vapours, and it is now recognized that the principal source is the oil-sealed rotary pumps which provide the backing vacuum. It has been shown that the organic vapours consist of low molecular weight fragments of oil molecules which have been degraded at hot spots produced by friction between the vanes and the surfaces on which they slide. As satisfactory oil-free pumps are unavailable, it is standard electron microscope practice to reduce the partial pressure of organic vapours in the microscope in the vicinity of the specimen by using liquid-nitrogen cooled anti-contamination devices. Traps of this type are sufficient to reduce the contamination rate to about 0.1 Å per min, which is tolerable for many investigations.

World Bank pinpoints disaster hot spots

Nature ◽  
2005 ◽  
Author(s):  
Deirdre Lockwood
Keyword(s):  
World Bank ◽  
Hot Spots

Proxy-Based IPv6 Neighbor Discovery Scheme for Wireless LAN Based Mesh Networks

2010 ◽  
Vol E93-B (5) ◽  
pp. 1151-1154
Author(s):  
Jihoon LEE ◽  
Seungwoo JEON ◽  
Jaehoon KIM
Keyword(s):  
Wireless Lan ◽  
Mesh Networks ◽  
Neighbor Discovery
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