In Switzerland, infertility is the main reason for involuntary culling of dairy cows. According to several studies, 25 to 35 % of dairy cows are culled because of reproductive problems (Rust, 2001; Aeberhard et al., 1997; Stärk et al., 1997). Failure to conceive, absent or unobservable cyclicity and embryonic loss are the most important culling reasons within the “reproductive problems”-complex...

Cotton-picker dataset containing 10 million triangles. Occlusion culling in z-buffer systems has drawn a lot of attention over the last few years.1,3 Due to the high computational costs of occlusion queries, hardware support is required to accelerate interactive rendering. This requires mechanisms that fit nicely into an available graphics subsystem without greedily consuming chip real estate (...

Occlusion and visibility culling is one of the major techniques to reduce the geometric complexity of large polygonal models. Since the introduction of hardware assisted-occlusion culling in OpenGL (as an extension), solely software-based approaches are losing relevance rapidly for applications which cannot exploit specific knowledge of the scene geometry. However, there are still several issue...

Occlusion culling methods are an important tool for efficient rendering of large scenes. Usually only a small part of such a scene is visible from a specific viewpoint. Therefore occlusion culling methods try to determine which parts of the scene are invisible and can be culled. That way usually only a small part of the scene ́s primitives has to be drawn. This is especially important for real-t...

Among the costs attributed to Mycobacterium avium ssp. paratuberculosis (MAP) infection in dairy cattle, the effects on reproduction and culling are the least documented. To estimate the cost of MAP infections and Johne's disease in a dairy herd, the rates of calving and culling were calculated for cows in each stage of MAP infection relative to uninfected cows. Data from 6 commercial dairy her...

The removal of individuals from an infected population (culling) is a common strategy used to eradicate wildlife diseases. The manipulation of host density can impose strong selective pressures on pathogen virulence by changing the ecological conditions, thus affecting the effectiveness of eradication programs. We present an analysis of the effect of virulence evolution on culling by extending ...