AJIL AT 111

Ajil: Distributed Rate-limiting for Multicast Networks

Multicast traffic patterns play a key role in dependable data centers, arising when data is replicated and distributed over multiple machines for fault-tolerance and availability. Such settings involve large numbers of multicast groups as well as multiple senders to each group — a single system can have hundreds of such multicast channels. Without effective multi-channel rate control, multicast...

Molecular self-assembly at nanometer scale modulated surfaces: trimesic acid on Ag(111), Cu(111) and Ag/Cu(111).

The balance between molecule-molecule and molecule-surface interactions is a determining factor in the creation of well-ordered organic networks formed by self-assembly on crystalline metal surfaces. We have used a scanning tunneling microscope under ultrahigh vacuum conditions to study the molecular self-assembly of trimesic acid on a surface that is modulated on a comparable nanometer scale a...

P-111: L-Carnitine

A homomolecular porous network at a Cu(111) surface.

Anthraquinone molecules self-assemble on a Cu(111) surface into a large two-dimensional honeycomb network (square root of 304 x square root of 304)R23 degrees with pore diameters of approximately 50 A. The spontaneous formation of a pattern containing pores roughly five times larger than the size of the constituent molecules is unprecedented. The network originates from a delicate balance betwe...

Interaction of oxygen with Al„111... at elevated temperatures

The interaction of oxygen with Al~111! was investigated by STM at temperatures between 350 and 530 K, by annealing an oxygen precovered surface and by adsorption of oxygen on the hot surface. For exposures up to 10 L and temperatures up to 470 K a considerable part of the oxygen exists still in the chemisorbed state, another part transforms into Al oxide. In contrast to 300 K chemisorbed Oad at...