Retreat of the Last Glacial Maximum (LGM) Antarctic ice sheet is thought to have been initiated by changes in ocean heat and eustatic sea level propagated from the Northern Hemisphere (NH) as northern ice sheets melted under rising atmospheric temperatures. The extent to which spatial variability in ice dynamics may have modulated the resultant pattern and timing of decay of the Antarctic ice s...

The Greenland ice sheet has become one of the main contributors to global sea level rise, predominantly through increased meltwater runoff. The main drivers of Greenland ice sheet runoff, however, remain poorly understood. Here we show that clouds enhance meltwater runoff by about one-third relative to clear skies, using a unique combination of active satellite observations, climate model data ...

A case is made for the existence of permeability of current sheets in electromagnetic pulsed plasma thrusters. Permeability refers to the leakage of plasma or neutral particles behind the sheet and could cause a significant effect on the performance of the thruster. Analytical calculations are presented which demonstrate the mismatch between experimental velocity profiles and theoretical snowpl...

The design and characterization of an open eight-stranded beta-sheet in a synthetic, 2-fold symmetric 70-residue peptide is described. The design strategy involves the generation of a 35-residue four-stranded beta-sheet peptide in which successive hairpins are nucleated by appropriately positioned (D)Pro-Xxx sequences. Oxidative dimerization using a single Cys residue positioned at the center o...

This thesis presents work towards automatic organization and synchronization of scanned sheet music and digitized audio recordings in the scenario of a digital music library. The organization targeted in the project of this thesis includes the segmentation of sheet music books and audio CD collections into individual songs or movements, mapping the resulting segments to corresponding records in...

Time-series microwave satellite observations are used to investigate seasonal and interannual changes in the surface characteristics of the Antarctic ice sheet. Enhanced-resolution Cband ERS-1/2 scatterometer (ESCAT) backscatter and DMSP SSMI brightness temperature images of Antarctica, acquired on a 3-day interval between 1992 and 1997, have been analysed. Both ESCAT and SSMI data show a clear...

Replication of data has been used for enhancing its availability in the presence offailures in distributed systems. Data can be replicated with greater ease thangeneralized objects. We review some of the techniques used to replicate objects forresilience in distributed operating systems. Wediscuss the problems associated with the replication of objects and presentascheme...

Features • High-performance READ – 115ns initial READ access – 135ns initial READ access – 25ns, 8-word asynchronous-page READ • Architecture – Asymmetrically blocked architecture – Four 32KB parameter blocks with top or bottom configuration – 128KB main blocks – Serial peripheral interface (SPI) to enable lower pin count on-board programming • Phase change memory (PCM) – Chalcogenide phase cha...