A method for the surface reconstruction of 3D tubular branched structures characterized by low informative point clouds (i.e., 2.5D) is proposed. These specific can arise when using photogrammetry techniques on complex subjects in challenging scanning environments (e.g., underwater gorgonian coral at mesophotic depths). The core idea behind proposed Sphere Skeleton Approach (SSA) to approximate...

Preparing synthetic or virtual 3D environments for use in military simulation can sometimes be seen as a ‘black art’. To achieve the required geospecific correlated terrain output, the process requires the correct coordinate system, the right projection/datum, access to digital elevation data and satellite imagery of sufficient resolution for the required application. The latter of these – acce...

The Office of Naval Research (ONR) is sponsoring a project to improve the cognitive validity of synthetic opponents in Computer Generated Forces. These synthetic soldiers will be used to improve the effectiveness of training simulations for Military Operations on Urban Terrain (MOUT). We are working towards this goal by developing human performance models using the ACT-R cognitive architecture....

K e y w o r d s N o n l i n e a r systems, Darcy law, Asymptotic analysis, Fixed-point methods, Weak solutions. 1. I N T R O D U C T I O N In moving boundary problems, the mathematical formulations can be quite varied, depending on very different and complicated physical situations. In 1992 and 1996, respectively, Gilbert and Shi [1,2] derived the following Hele-Shaw Models I and II for nonisot...

Typically, the design of cognitive models has not emphasized the role of interfaces for describing the models’ behavior. Models that populate synthetic environments are particularly complex and need support in this area. Using a variety of subject-matter experts we evaluated the use of the Situation Awareness Panel (SAP) as a tool for inspecting the behavior and reasoning of Soar agents in a JS...

objects are simply different in kind from ordinary objects: the latter are not the kind of thing that could encode properties; the former are not the kind of thing that could be concrete. Moreover, abstract objects necessarily fail to exemplify the properties of ordinary objects— they necessarily fail to have a shape, they necessarily fail to have a texture, they necessarily fail to reflect lig...

The National Automotive Center (NAC) Ground Vehicle Simulation Laboratory (GVSL) is developing and applying engineering simulators and simulations for the evaluation of ground vehicles during all stages of a weapon system’s life cycle research, development, and procurement of new systems; technology insertion and modifications to fielded systems; and trouble-shooting activities arising from tes...

We consider a priori generalization bounds developed in terms of cross-validation estimates and the stability of learners. In particular, we first derive an exponential Efron-Stein type tail inequality for the concentration of a general function of n independent random variables. Next, under some reasonable notion of stability, we use this exponential tail bound to analyze the concentration of ...

CGFv25i4pp844-849:2006 [1] 27th EUROGRAPHICS General Assembly. Computer Graphics Forum 25, 4 (2006), 844–849. CGFv25i1pp143-143:2006 [2] 4th International Workshop on Volume Graphics. Computer Graphics Forum 25, 1 (2006), 143–143. CGFv25i4pp853-857:2006 [3] Author Index Volume 25 (2006). Computer Graphics Forum 25, 4 (2006), 853–857. CGFv25i1pp147-148:2006 [4] CGForum 2006 Cover Image "Charles ...

introduction: a total dissolved solid (tds) is an important indicator for water quality assesment. since the composition of mineral salts and discharge affects the tds of water, it is important to understand the relationships of mineral salts composition with tds. materials and methods: in this study, methods of artificial neural networks with five different training algorithm,levenberg-marquar...