Synchronization operations, such as fence and locking, are used in many parallel operations accessing shared memory. However, a process which is blocked waiting for a fence operation to complete, or for a lock to be acquired, cannot perform useful computation. It is therefore critical that these operations be implemented as efficiently as possible to reduce the time a process waits idle. These ...

[1] Land clearing for agricultural purposes in southwest Australia has created a landscape where a 750 km rabbit‐proof fence separates 13 million hectares of croplands from the remnant native vegetation to the east. The Bunny Fence Experiment (BuFex) was conducted in the vicinity of the intended vermin‐proof boundary in December 2005 and August 2007. The experiment examined the role of land cov...

Detection and removal of fences from digital images becomes essential when an important part of the scene turns to be occluded by such unwanted structures. Image de-fencing is challenging because manually marking fence boundaries is tedious and time consuming. The fence is a distributed object and may cover a significant portion of the scene. In this paper a novel image de-fencing algorithm tha...

Conventional approaches to image de-fencing suffer from non-robust fence detection and are limited to processing images of static scenes. In this position paper, we propose an automatic de-fencing algorithm for images of dynamic scenes. We divide the problem of image de-fencing into the tasks of automated fence detection, motion estimation and fusion of data from multiple frames of a captured v...

As a lunar lander approaches the surface, the impinging exhaust gases entrain regolith into a high velocity spray. This two-phase spray can be damaging to nearby structures, such as a lunar outpost. One way of mitigating this damage is to use a berm or fence to shield nearby structures from the dust spray. In this work, we use a coupled continuum – DSMC (direct simulation Monte Carlo) solver to...

Pre 1800s: Foragers and agropastoralists occupy the Central Kalahari region. 1849: Livingstone, Oswell, and Murray cross the eastern Kalahari Desert to the Botletle River. 1877: The Dorstland Trekkers cross the Kalahari (pass NE comer of the Reserve). 1898: Founding of the Ghanzi Fanns by Cecil Rhodes and company. 1905: Some Bakwena cattle herded out of the Central Reserve to the Botletle River...

Applications such as software updaters or a run-away web app, even if low priority, can cause performance degradation, loss of battery life, or other issues that reduce a computing device’s availability. The core problem is that OS resource control mechanisms unevenly apply uncoordinated policies across different resources. This paper shows how handling resources – e.g., CPU, memory, sockets, a...

Increasing habitat fragmentation and human population growth in Africa has resulted in an escalation in human–elephant conflict between small-scale farmers and free-ranging African elephants (Loxodonta Africana). In 2012 Kenya Wildlife Service (KWS) implemented the national 10-year Conservation and Management Strategy for the Elephant in Kenya, which includes an action aimed at testing whether ...