Cell-DEVS is an extension to the DEVS formalism that allows the definition of cellular models. CD++ is a modeling and simulation tool that implements Discrete Event Simulation (DEVS) and Cell-DEVS formalisms. The methodology proposed in this paper uses the Cell-DEVS formalism and C++ tool chain [4, 5] to model Uninhabited Aerial Vehicle (UAV) search in a dynamic intelligence environment. Algorithms proposed in previous works [1] were applied to modify the intelligence environment over time. The UAV search pattern was based on this information and the resulting simulation demonstrates emergent UAV search patterns in this intelligence environment. Rule sets model the degradation of this intelligence over time using algorithms proposed in [1], are referred to as a diffusion algorithm; the UAV traversed this map using a hill-climbing algorithm. The resulting UAV search pattern showed preference for the local maximum of target location probability before total maximum to produce an intuitive search pattern. The Cell-DEVS architecture and CD++ tool chain provided a robust development and visualization environment suited to this research.

We show the design and implementation of a robot controller with a unique locomotion system.We demonstrate that a discrete-event simulation based design provides a cost-effective, flexible, open workflow for modular robotic development.The robot is designed to translate against a vertical surface using cables fixed at one end that can wind on motor-controlled spools attached to the robot.This architecture was implemented first as a regressively tested simulation within CD++ then ported to Real-time CD++.Using the NXT++ interface library, a hardware implementation of the robot using Lego® Mindstorms™ was shown to be controllable.

Smith–Purcell (SP) radiation at wavelengths of 350–750 nm was produced in a tabletop experiment using a field-emitter array (FEA) cathode. The electron gun was 5 cm long, and a 25 mm×25 mm holographic replica grating was placed behind the slit provided in the anode. A regulated DC power supply accelerated electron beams in excess of 10 μA up to 45 keV, while a small Van de Graaff generator accelerated smaller currents to higher energies. The grating had a 0.556 μm period, 30° blaze and a 0.2 μm thick aluminum coating. Spectral characteristics of the radiation were measured both manually and automatically; in the latter case, the spectrometer was driven by a stepping motor to scan the wavelength, and AD-converted signals from a photomultiplier tube were processed by a personal computer. The measurement, made at 80° relative to the electron beam, showed good agreement with theoretical wavelengths of the SP radiation. Diffraction orders were −2 and −3 for beam energies higher than 45 keV, −3 to −5 at 15–25 keV, and −2 to −4 in between. The experiment has thus provided evidence for the practical applicability of FEAs to compact radiation sources.