The uniqueness of individuals is a striking scientific fact, but it is just one of those facts that can hardly be done justiceto in an obituary notice. In writing this brief memoir of my departed friend, Ernest Blacker, I am regretfully conscious of this shortcoming. It may, however, be stated that his was a cheery, neat, alert and debonair personality, rich in human sympathies and sociabilitie...

Calving from the floating termini of outlet glaciers and ice shelves is just the beginning of an interesting chain of events that can subsequently have important impacts on human life and property. Immediately after calving, many icebergs capsize (roll over by 90◦) due to the instability of their initial geometry. As icebergs melt and respond to the cumulative effects of ocean swell, they can a...

Iceberg calving from all Antarctic ice shelves has never been directly measured, despite playing a crucial role in ice sheet mass balance. Rapid changes to iceberg calving naturally arise from the sporadic detachment of large tabular bergs but can also be triggered by climate forcing. Here we provide a direct empirical estimate of mass loss due to iceberg calving and melting from Antarctic ice ...

Iceberg queries are a special case of SQL queries involving GROUP BY and HAVING clauses, wherein the answer set is small relative to the database size. We present here a performance framework and a detailed evaluation within this framework of the efficiency of various iceberg query processing techniques. Based on these results, we provide a simple recipe algorithm that can be implemented in a q...

The Iceberg-Cube problem is to apply an aggregate function over a set of attributes to determine which combinations of attribute values are above a specified aggregate threshold. We implemented bottom-up and top-down methods for this problem. The bottom-down method we used already used pruning. Results show that even when the top-down method employed pruning, it was slower than the bottom-up me...