The UNIX Fast File System (FFS) is probably the most widely-used file system for performance comparisons. However, such comparisons frequently overlook many of the performance enhancements that have been added over the past decade. In this paper, we explore the two most commonly used approaches for improving the performance of meta-data operations and recovery: logging and Soft Updates. The com...

We investigated how legal logging history and recent illegal logging affected forest bird community structure in Ghana. Ghanaian forests belong to West Africa’s highly fragmented Upper Guinea rain forests, part of a global priority ‘‘biodiversity hotspot’’ under intense pressure from anthropogenic degradation. Between 1995 and 2010, officially-reported legal logging intensities increased up to ...

Deterministic execution of parallel applications can be enforced by logging speculative memory accesses and restoring saved state in the event of a conflict. However, logging all accesses has a prohibitive overhead. We propose three techniques to reduce logging in an always-on transactional memory system. The first, Threaded Section Analysis, statically determines when only a single thread is r...

Unpaved resource roads have the potential to produce large amounts of sediment and can negatively impact water quality and aquatic ecology. In order to better understand the dominant controls on sediment generation from unpaved resource roads, we did 23 large-scale rainfall simulation experiments on a road section in the Honna Watershed, Haida Gwaii, British Columbia, Canada. The experiments we...

In a case study a University class undertook a translation from Swedish to English in a keystroke logging environment and then replayed their translations in pairs while discussing their thought processes when undertaking the translations, and why they made particular choices and changes to their translations. Computer keystroke logging coupled with peer-based intervention assisted the students...