Comparison of measurements of peroxyacyl nitrates and primary carbonaceous aerosol concentrations in Mexico City determined in 1997 and 2003 N. A. Marley, J. S. Gaffney, R. Ramos-Villegas, and B. Cárdenas González University of Arkansas at Little Rock, Little Rock, Arkansas, U.S.A. Secretariat of the Environment, Government of the Federal District, Mexico City, D.F., Mexico El Centro National d...

Consider the following situation: Alice is a hand-held device, such as a PDA. Bob is a device providing a service, such as an ATM, an automatic door, or an anti-aircraft gun pointing at the gyro-copter in which Alice is travelling. Bob and Alice have never directly met before, but share a key as a result of secure hand-offs. Alice has used this key to request a service from Bob (dispense cash, ...

Identity-based decryption is an alternative to identity-based encryption, in which Alice encrypts a symmetric key for Bob under a trusted authority’s public key. Alice sends Bob the resulting ciphertext, which Bob can send to the trusted authority. The trusted authority provides Bob the symmetric key only upon verifying Bob’s identity. 1 Identity-Based Encryption Shamir introduced [7] the notio...

We provide an ice friction model for vehicle dynamics of a two-man bobsled which can be used driver evaluation and in driver-in-the-loop simulator. Longitudinal is modeled by combining experimental results with finite element simulations to yield correlation between contact pressure friction. To lateral friction, we collect data from 44 bobsleigh runs using special sensors. Non-linear regressio...

PHYSICAL TRACES SAMSON ABRAMSKY AND BOB COECKE Abstract. We revise our ‘Physical Traces’ paper [Abramsky and Coecke CTCS‘02] in the light of the results in [Abramsky and Coecke LiCS‘04]. The key fact is that the notion of a strongly compact closed category allows abstract notions of adjoint, bipartite projector and inner product to be defined, and their key properties to be proved. In this pape...