The number of households and businesses using HFC cable networks for Internet access is rapidly approaching 40 million in the United States. The cable industry has standardized on a single MAC and physical layer standard, the Data Over Cable System Interface Specification (DOCSIS). The emerging IEEE 802.16 broadband wireless access MAC protocol is based on DOCSIS. We have implemented a simulati...

We make a precise mathematical statement of the conjecture that Gromov-Witten theory on an orbifold should be equivalent to Gromov-Witten theory on a crepant resolution (should one exist.) We prove the conjecture for the equivariant Gromov-Witten theories of Symn C and Hilbn C.

The Drosophila gene jim was identified by an enhancer trap line showing asymmetric dorso-ventral expression in the follicular epithelium. It gives rise to the jim-1 and jim-2 transcripts that contain distinct 5'-UTRs but encode the same nine C(2)H(2) zinc finger protein. From stage 10A onward, jim-1 RNA is transcribed in squamous cells while jim-2 RNA is specific to all non-antero-dorsal column...

There is a growing view that systemic risk arises due to loss of intermediation for the overall economy – a negative externality – when the financial sector becomes under-capitalized as a whole. In turn, the systemic risk contribution of an individual financial firm can be defined as its share of this negative externality. Motivated by this intuition, a number of authors have proposed a “Pigovi...