by Christopher O. Porter Aero-optical aberrations associated with turbulent compressible flow fields can seriously degrade the performance of an optical system; the effect of these aberrations increases as the wavelength of the transiting light becomes shorter, and so is particularly strong at visible and near-infrared wavelengths. These aero-optic aberrations originate from both spatialand tem...

In this paper, the particular solution technique for inverse simulation applied to the quadrotor maneuvering flight is investigated. The ‎trust-region dogleg (DL) technique which is proposed alleviates the weakness of Newton’s method used for numerical differentiation of system states in the solution process. The proposed technique emphasizes global convergence solution to the inverse simulatio...

Height is a critical variable for helicopter hover control. In this paper we discuss, and present experimental results for, two different height sensing techniques: ultrasonic and stereo imaging, which have complementary characteristics. Feature-based stereo is used which provides a basis for visual odometry and attitude estimation in the future.

Due to the present water shortage and environmental problems associated with industrial effluent, investigation of novel treatment technologies is an essential approach. Being a highly toxic chemical of asphyxiating characteristics, cyanide is seen as a major environmental pollutant in a wide range of industrial effluents. The present study aimed to address the adsorption and photocatalytic deg...

A state-space model for a small radio-controlled helicopter in hover is developed. Linear estimation is used to identify parameters of the model. The parameter variances are used to develop an uncertainty description of the system. An LQG controller with setpoint tracking is designed and implemented on this system.

Introduction Heterogeneity in composition and spatial configuration of landscape elements support diversity abundance flower-visiting insects, but this is likely dependent on taxonomic group, scale, weather climatic conditions, particularly impacted by agricultural intensification. Here, we analyzed the impacts both aspects heterogeneity role conditions pollinating insect communities two econom...