Alexander C. Woods

Learn More
Unmanned Aerial Vehicles (UAV), commonly known as drones, have many potential uses in real world applications. Drones require advanced planning and navigation algorithms to enable them to safely move through and interact with the world around them. This paper presents an extended potential field controller (ePFC) which enables an aerial robot, or drone, to(More)
Unmanned Aerial Vehicles (UAV), commonly known as drones, have many potential uses in real world applications. Drones require advanced planning and navigation algorithms to enable them to safely move through and interact with the world around them. This paper presents an extended potential field controller (ePFC) which enables an aerial robot, or drone, to(More)
The temperature in an aluminized propellant is determined as a function of height and plume depth from diatomic AlO and thermal emission spectra. Higher in the plume, 305 and 508 mm from the burning surface, measured AlO emission spectra show an average temperature with 1σ errors of 2980 ± 80 K. Lower in the plume, 152 mm from the burning surface, an(More)
This paper presents the design, fabrication, modeling, and demonstration of a micro spherical rolling and flying robot, with a total mass and payload of 35 g and 10 g, respectively. The micro aerial terrestrial robot (ATR) has the ability to fly through the air or roll on the ground, for applications that include search and rescue, mapping, and(More)
This article addresses hydrogen Balmer series measurements following laser-induced optical breakdown. Electron density on the order of 1 × 10 m−3 can be inferred using Hα Stark width and shift for plasma generated in 1 to 1.3 × 10 Pa, gaseous hydrogen. The Hβ line can be utilized for electron density up to 7 × 10 m−3. Laser ablation of aluminium reveals(More)
We present results including measurement and analysis of titanium monoxide. Pulsed, nanosecond Nd:YAG laser radiation is used in a typical laser-induced breakdown spectroscopy arrangement to record the spectra. This scheme provides experiments analogous to pulsed laser deposition tactics and allows for time-resolved spectroscopic analysis. The computed(More)
Current efforts involving laser-induced breakdown spectroscopy investigate titanium monoxide (TiO) transitions, inferring temperature for various delay times following laser-induced breakdown. A titanium sample resting in laboratory air is repeatedly exposed to nanosecond pulsed radiation generated by a Nd:YAG laser. Spectral measurements are collected at(More)
Chromatin is thought to act as a barrier for binding of cis-regulatory transcription factors (TFs) to their sites on DNA and recruitment of the transcriptional machinery. Here we have analyzed changes in nucleosome occupancy at the enhancers as well as at the promoters of three pro-inflammatory genes when they are induced by bacterial lipopolysaccharides(More)
The spectral transitions of titanium monoxide (TiO), contained in stellar spectra for K-type and M-type stars, have long been observed by astronomers. Recent interest in the titania (TiO2) nanoparticle for thin film fabrication brings additional interest in the analysis of the TiO molecular transitions in a plasma. The transition bands for the TiO molecule(More)