The paper is concerned with investigation of effects of culling techniques on quality and smoothness of terrain data visualization within a 3D interactive environment. We utilize the Real-Time Optimally Adapting Mesh (ROAM) approach, extended with a number of efficient techniques such as implicit coordinates method within the patch array representing ROAM and the viewpoint dependent triangle re...

As many applications in computer graphics require render high complex 3D scenes at interactive rates, the search for an effective visibility culling method has become one of the most important issues to be addressed in the design of 3D rendering processors. In this paper, we proposed a new rasterization pipeline with visibility culling; the proposed architecture performs the visibility culling ...

Image-space occlusion culling is an useful approach to reduce the rendering load of large polygonal models in scientific computing, mechanical engineering, or virtual medicine. Like most large model techniques, occlusion culling trades overhead costs with the rendering costs of the possibly occluded geometry. In this paper we present an occlusion culling toolkit for OpenSG. The toolkit includes...

In the long term, resilient animals are able to maintain their normal biological processes when confronted with environmental perturbations, reducing risk of being culled. Therefore, longevity can be proposed as an indicator long-term resilience. Decisions remove a given dairy cow from herd mainly related low milk production (i.e., voluntary culling) or reasons other than involuntary culling). ...

We have developed a visualization system, named Atomsviewer, to render a billion atoms from the results of a molecular dynamics simulation. This system uses a hierarchical view frustum culling algorithm based on the octree data structure to efŽciently remove atoms that are outside of the Želd of view. A novel occlusion culling algorithm, using a probability function, then selects atoms with a h...

Annual performance measurements, age structures of female pig inventories, and by-parity culling rates were abstracted from data files of 110 herds that participated in a data-share program in Japan. Parity at culling was used as a prime measurement of longevity, whereas pigs weaned x mated female(-1) x year(-1) (PWMFY) was a prime measurement of reproductive efficiency. High or low longevity h...

Infection elimination may be an important goal of control programs. Only in stochastic infection models can true infection elimination be observed as a fadeout. The phenomena of fadeout and variable prevalence are important in understanding the transmission dynamics of infectious diseases and these phenomena are essential to evaluate the effectiveness of control measures. To investigate the sto...

Records from 7,200 separate closed herds with either 12 or 25 sows that were mated to either four or eight boars per year were simulated by computer. Effects of selection method, herd size, and contemporary group variability on average genetic change, genetic variance, and inbreeding over 10 yr of selection were analyzed for traits with heritabilities of .1, .3, and .6. Selection of replacement...

Risk of culling consequent to the main health disorders occurring in the current production systems are reviewed. Survival analysis models including health disorders as time-dependent variables are deemed to be the most appropriate to assess their effects because they allow a better description of the exact follow-up of disease history. Farmers preferentially consider health events in the curre...