A Survey of Ocean Simulation and Rendering Techniques in Computer Graphics

This paper presents a survey of ocean simulation and rendering methods in computer graphics. To model and animate the ocean's surface, these methods mainly rely on two main approaches: on the one hand, those which approximate ocean dynamics with parametric, spectral or hybrid models and use empirical laws from oceanographic research. We will see that this type of methods essentially allows the simulation of ocean scenes in the deep water domain, without breaking waves. On the other hand, physically-based methods use Navier-Stokes Equations (NSE) to represent breaking waves and more generally ocean surface near the shore. We also describe ocean rendering methods in computer graphics, with a special interest in the simulation of phenomena such as foam and spray, and light's interaction with the ocean surface

Attenuation Effects on Imaging Diagnostics of Hollow-Cone Sprays

Detrimental effects to quantitative interpretation of Mie and laser-induced fluorescence images of hollow-cone sprays were investigated. The attenuation of the laser beam leads to locally unknown intensities rendering it impossible to obtain high-fidelity images of these sprays. Two strategies that use bidirectional illumination of the spray are discussed and evaluated. Conditions for which a bidirectional illumination, single-image detection will allow good recovery of the spray structure are identified. Furthermore, the attenuation of laser-induced fluorescence signals on their path through the spray is quantified.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/86760/1/Sick31.pd

Coupling CFD and visualisation to model the behaviour and effect on visibility of small particles in air

The use of computational fluid dynamics (CFD) and lighting simulation software is becoming commonplace in building design. This study looks at a novel linkage between these two tools in the visualization of droplets or particles suspended in air. CFD is used to predict the distribution of the particles, which is then processed and passed to the lighting simulation tool. The mechanism for transforming CFD contaminant concentration predictions to a form suitable for visual simulation is explained in detail and an example presented which demonstrates this linkage. The CFD-visualisation simulations described in this paper have applications in both automotive and fire safety through the modelling of fog and smoke respectively. Historically, smoke and fog effects have been rendered in images with no attempt at modelling physical reality. The novelty of the work presented in this paper is that, for the first time, an attempt is made to model both the fluid mechanics and optical physics of small particles suspended in a primary fluid

The Early Bird Waits for the Worm: May Federal Judgments Be Registered Prior to Appeal?

The federal registration statute, codified at 28 U.S.C. § 1963, permits a judgment creditor to register his or her judgment in another state by simply filing a copy of the judgment with the clerk of the registering court. Registration is permitted when the judgment becomes final by appeal, when the time to appeal expires, or when the court that entered the judgment orders registration for good cause shown. The majority of courts have interpreted good cause as a showing that the judgment debtor lacks assets in the forum jurisdiction to fulfill the judgment, but possesses substantial assets in the registering jurisdiction. District courts are split, however, on whether there must be a pending appeal before registration can be ordered. Registration gives the judgment creditor power to create a lien on the judgment debtor’s property in another district. The effect of the registered judgment depends on a state’s laws regarding liens. Liens in some states may reach personal property, creating the potential for a registered judgment to have harsh effects on the debtor’s livelihood and placing restrictions on the alienability of real property. The posting of a supersedeas bond can stay the enforcement of a judgment and alleviate the need for registration. This Note argues that a judgment creditor should be permitted to register her judgment without waiting for the judgment debtor to file an appeal. However, a court should have discretion to consider whether permitting registration when the judgment debtor has not yet posted a supersedeas bond would cause irreparable harm to a good faith debtor, and if so, grant the debtor time to post a bond

The Early Bird Waits for the Worm: May Federal Judgments Be Registered Prior to Appeal?

The federal registration statute, codified at 28 U.S.C. § 1963, permits a judgment creditor to register his or her judgment in another state by simply filing a copy of the judgment with the clerk of the registering court. Registration is permitted when the judgment becomes final by appeal, when the time to appeal expires, or when the court that entered the judgment orders registration for good cause shown. The majority of courts have interpreted good cause as a showing that the judgment debtor lacks assets in the forum jurisdiction to fulfill the judgment, but possesses substantial assets in the registering jurisdiction. District courts are split, however, on whether there must be a pending appeal before registration can be ordered. Registration gives the judgment creditor power to create a lien on the judgment debtor’s property in another district. The effect of the registered judgment depends on a state’s laws regarding liens. Liens in some states may reach personal property, creating the potential for a registered judgment to have harsh effects on the debtor’s livelihood and placing restrictions on the alienability of real property. The posting of a supersedeas bond can stay the enforcement of a judgment and alleviate the need for registration. This Note argues that a judgment creditor should be permitted to register her judgment without waiting for the judgment debtor to file an appeal. However, a court should have discretion to consider whether permitting registration when the judgment debtor has not yet posted a supersedeas bond would cause irreparable harm to a good faith debtor, and if so, grant the debtor time to post a bond