The Structure of Inner Multipliers on Spaces with Complete Nevanlinna Pick Kernels

We establish some multivariate generalizations of the Beurling-Lax-Halmos theorem.Comment: 21 page

Wireless Power Transfer In Autonomous Mobile Microgrids

The ability to autonomously dock unmanned ground vehicles plays a key role in mobile micro-grids, where efficient power transfer is paramount. The approach utilized in this work allows for near-field wireless power transfer in remote locations with minimal support. Establishing a micro-grid power system connection autonomously using wireless power eliminates the arduous task of designing a complex, multiple degrees of freedom (MDOF) robotic arm. The work presented in this thesis focuses on both the hardware and software within the micro-grid system. This particular near-field wireless system consists of a primary and secondary set of modules, comprised of Litz wire coils, which are inductively coupled to complete the circuit. Both the primary and secondary modules contain a shunt resistor circuit, as well as a potential divider circuit and an Arduino controller (used to collect and analyze recorded data). The aforementioned hardware, allows for quantitative measurements of voltage, current, and power of the primary and secondary modules. Robot rover docking is accomplished using camera visualization, wheel odometry, and GPS data, all of which, are provided by the Robot Operating System (ROS). Various docking poses are used to characterize overall power transfer and efficiency at diverse alignments. Using collected data from the near field power modules\u27 Arduino controllers and ROS, power from the coils is measured as functions of both the distance between coils and associated yaw angle. Power transfer efficiency is then evaluated using compiled power data. A dynamic feedback control system optimizes power transfer efficiency and docking alignment. The camera visual feedback control system acts as the driving force for re-docking the robot, further enhancing efficiency of the proposed near field power connection. In its entirety, this research explores the physical and mathematical relationships used to develop a dynamic feedback control system

Structural analysis of a thermal insulation retainer assembly

In January 1989 an accident occurred in the National Transonic Facility wind tunnel at NASA Langley Research Center that was believed to be caused by the failure of a thermal insulation retainer. A structural analysis of this retainer assembly was performed in order to understand the possible failure mechanisms. Two loading conditions are important and were considered in the analysis. The first is the centrifugal force due to the fact that this retainer is located on the fan drive shaft. The second loading is a differential temperature between the retainer assembly and the underlying shaft. Geometrically nonlinear analysis is required to predict the stiffness of this component and to account for varying contact regions between various components in the assembly. High, local stresses develop in the band part of the assembly near discontinuities under both the centrifugal and thermal loadings. The presence of an aluminum ring during a portion of the part's operating life was found to increase the stresses in other regions of the band. Under the centrifugal load, high bending stresses develop near the intersection of the band with joints in the assembly. These high bending stresses are believed to be the most likely cause for failure of the assembly

Geology of English Mountain and Vicinity, Cock, Jefferson and Sevier Counties, Tennessee

Statement of the Problem: English Mountain is interpreted by Rodgers (1953, Geologic Map of East Tennessee) as a remnant of rocks of the Chilhowee group, resting on a prong in the overthrust sheet of the Great Smoky fault. He showed the structure of the Chilhowee rocks to be synclinal in the central portion, monoclinal on the northern end, and monoclinal in the westward extension. Objective of the present writer were: 1) to check the major structure and detail the contacts, 2) to accurately locate the position of the Great Smoky fault, 3) to map the minor structures, 4) to study the stratigraphy of the Chilhowee group. In connection with the latter: a) the rock types and separation of the Hesse-Murray-Nebo sequence, b) the lithology and subdivisions of the Cochran formation, c) the Chilhowee-Ocoee contact, and d) the base of the Cambrian system were studied specifically

How to reduce your risk of injury from exposure to anhydrous ammonia

SF-962; This circular provides safety information on how to handle anhydrous ammonia. It includes bibliographical reference

The Ontario Court of Appeal and Speedy Justice

The authors use a data sample collected from the Ontario Court of Appeal minute books between 1983 and 1987 to analyze how appeals move through the province\u27s highest court. Criminal and, chiefly, sentence appeals dominate the Court\u27s agenda. Hearing times-the duration of argument and rendering of judgment-are shorter than commonly believed, most often lasting less than twenty minutes. Elapsed times-the period between end of trial and beginning of hearing-are, on average, 77 per cent longer for civil than criminal appeals, 52 per cent longer for defendant than crown appeals, and 23 per cent longer for fall than spring appeals. Elapsed times are also compared with data on United States appeal courts, and the use of appellate case-flow management is considered

The Ontario Court of Appeal and Speedy Justice

The authors use a data sample collected from the Ontario Court of Appeal minute books between 1983 and 1987 to analyze how appeals move through the province\u27s highest court. Criminal and, chiefly, sentence appeals dominate the Court\u27s agenda. Hearing times-the duration of argument and rendering of judgment-are shorter than commonly believed, most often lasting less than twenty minutes. Elapsed times-the period between end of trial and beginning of hearing-are, on average, 77 per cent longer for civil than criminal appeals, 52 per cent longer for defendant than crown appeals, and 23 per cent longer for fall than spring appeals. Elapsed times are also compared with data on United States appeal courts, and the use of appellate case-flow management is considered

Sensor technology and applications to a real-time monitoring system

Thesis (M.Eng.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 2001.Includes bibliographical references (p. 85-87).Large-scale structures such as bridges, dams and buildings have caused countless fatalities in the past decades because engineers were not able to detect the early signs of failure. It is believed that with the implementation of a distributed sensor network, many of these unfortunate events could have been avoided. The ultimate goal in applying distributed sensors is for structures to combine mechanical systems and computer processing to allow them to adapt themselves in extreme conditions without human assistance. The Flagpole project is attempting to build such a monitoring system by instrumenting a model of a flagpole in a laboratory environment. The selected sensors, accelerometers, strain gauges and thermocouples, provide a complete description of the model's behavior to the physical environment. These sensors stream data into a data acquisition system, which buffers the data and directs it to a database for storage. Visualization software allows for Internet users to view the data in real-time and analyze the model's reaction to current external forces. For this system to become more automated, new sensor technology must be explored. Recent advances in the field of MEMS technology and wireless communication should be examined to build a system that incorporates decision-making at the sensor level and is expandable to larger scale systems.by David C. Greene.M.Eng

Comment on Fano Line Shapes Reconsidered: Symmetric Photoionization Peaks from Pure Continuum Excitation

A Comment on the Letter by U. Eichmann. T. F. Gallagher, and R. M. Konik, Phys. Rev. Lett. 90, 233004 (2003). The authors of the Letter offer a Reply