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Persistent object systems must provide some form of checkpointing to ensure that changes to persistent data are secured on non-volatile storage. When processes share or exchange modified data, mechanisms must be provided to ensure that they may be consistently checkpointed. This may be performed eagerly by synchronously checkpointing all dependent data.(More)
BACKGROUND Patients with chronic exertional compartment syndrome (CECS) have pain during exercise that subsides with rest. Diagnosis is usually confirmed by intramuscular compartment pressure (IMCP) measurement. Controversy exists regarding the accuracy of existing diagnostic criteria. PURPOSE (1) To compare dynamic IMCP measurement and anthropometric(More)
Persistent stores have been implemented using a variety of storage technologies including shadow paging, log-based and log-structured approaches. Here we compare these approaches and advocate the use of log-structuring. The advantages of such a technique include efficient support for large (64 bit) address spaces, scalability and fast snapshot processing.(More)
SUMMARY Since the 1980s, various groups have been constructing systems that support a concept known as orthogonal persistence. These systems support objects whose lifetime is independent of the context in which they were created. The benefits of such systems include greater run-time efficiency, strong semantic guarantees about the existence of data and its(More)
OBJECTIVE Shoulder instability is a common cause of morbidity among professional rugby union players. This study explores whether the risk of shoulder dislocation is associated with innate shoulder laxity. DESIGN Retrospective cohort study. SETTING Clinical sports medicine research at professional rugby clubs. PARTICIPANTS One hundred sixty-nine(More)
O PERATING systems manage a computer's resources, maintain its permanent data, and provide an efficient environment for the execution of user programs. Users expect an operating system to provide a certain level of resilience to failure and facilities for recovering from failure with minimal interruption of computations and minimal loss of data. In(More)
To cite: Franklyn-Miller A, Roberts A, Hulse D, et al. Br J Sports Med 2014;48: 415–416. Chronic exertional compartment syndrome (CECS) was first described in 1956, but little research has been performed since then to confirm the pathological physiology. An assumption is made that elevated subfascial or intramuscular pressure during exercise causes tissue(More)
[1] Water scarcity may appear to be a simple concept, but it can be difficult to apply to complex natural-human systems. While aggregate scarcity indices are straightforward to compute, they do not adequately represent the spatial and temporal variations in water scarcity that arise from complex systems interactions. The uncertain effects of future climate(More)
Investigations using available data sought to guide short-term management decisions regarding the needs of northern spotted owl in the high Cascade Mountains of Oregon. Landscape attributes and pattern indices were measured and tested for identification of areas likely to contain northern spotted owl nests. Predictive models indicating planning standards(More)
Lumberjack is a log-structured persistent object store intended for use with conventional operating systems such as Unix. The design draws together facets of previous work, in particular, the CPOMS object store used to support PS-algol, and the page-based log-structured store used in the Grasshopper persistent operating system. Lumberjack exhibits a novel(More)