An h-adaptive, mass-consistent finite-element model (FEM) has been developed for constructing 3D wind fields over irregular terrain utilizing sparse meteorological tower data. The element size in the computational domain is dynamically controlled by an a posteriori error estimator based on the L2 norm. In the h-adaptive FEM algorithm, large element sizes are typically associated with smooth flo...

Wireless Sensor Networks (WSNs) are composed by a large number of sensor nodes, which are usually small in size and are deployed inside or close to some phenomenon of interest. Moreover, since usually there is no need for regular or predefined deployment, the sensors can be placed over irregular or inaccessible areas. Therefore, according to [2], it is expected that the sensors possess self-org...

Propagation modeling and simulation approaches for the use of High Frequency Surface Wave Radar (HFSWR) are discussed. HFSWR uses vertically polarized surface waves along multi-mixed paths in the lower HF band (3 MHz 15 MHz). Various numerical propagators are reviewed with an early analytical model. Split Step Fast Fourier Transformation, finitedifference, and finite-element solutions of the we...

Experience in digital terrain modelling has shown, that analysis and preparation of the primary data is of great importance both for the productivity and the quality of DTM modelling. The paper presents a semi-automatic procedure to analyze the primary data in a numerical and graphical way. After gross error detection and data structuring using a triangular irregular network (TIN) the density a...

1) Title: Combat Modeling and Model Validation Researcher(s): Imre Balogh, Curtis Blais, and Todd Richmond Abstract: The MOVES Institute is engaged in research, development, and evaluation of a number of combat models in use or proposed for use in the military services. During this session, we will describe and demonstrate activities underway in several areas, including: (1) modifications to th...

This paper describes the design of a fuzzy controlled robot for use in an agricultural environment. This environment comprises of an open, but irregular terrain either supporting crops or sparsely populated with objects. This results in complex problems of identification, monitoring and control. In this paper a fuzzy controller is identified which when used with a novel sensor design can deal w...

We investigate controllers for mobile humanoid robots that maneuver in irregular terrains while performing accurate physical interactions with the environment and with human operators and test them on Dreamer, our new robot with a humanoid upper body (torso, arm, head) and a holonomic mobile base (triangularly arranged Omni wheels). All its actuators are torque controlled, and the upper body pr...

Online generation of trajectories in robots is a very complex task that involves the combination of different types of movements, i.e., distinct motor primitives. The later are used to model complex behaviors in robots, such as locomotion in irregular terrain and obstacle avoidance. In this paper, we consider two motor primitives: rhythmic and discrete. We study the effect on the robots’ gaits ...

Traditional polygon-arc-node topology is standard in vector GIS, but it has its limitations. This is particularly evident at the digitizing stage, which often appears excessively complex and tedious, Other methods, however, are capable of maintaining some forms of topology “automatically”, and this paper is an overview of three approaches based on the Voronoi diagram (or the equivalent Delaunay...

In this paper, we propose an interactive approach to synthesize macroscopic terrain using real terrain elevation data effectively and realistically. Users construct terrain primitives in the interactive environment by specifying terrain microscopic features. The features are then used to obtain a real terrain unit, one of the best matched terrain units, from terrain unit database where all unit...