Capacity of classes of Gaussian channels. Part I - Discrete-time

Capacity of discrete time Gaussian channel

An Examination in the Evolution of Iroquois Lacrosse

Once a niche sport to Canada and the northeastern United States, lacrosse has become the fastest growing sport in North America. Though it was played for hundreds of years by the indigenous peoples of this continent prior to the arrival of Europeans, the native roots of the game have not been truly appreciated on a wide scale until recent years. After the adaption and modernization of the game in the mid nineteenth century by Victorian Canadians, the inventors of lacrosse would see over a century of exclusion and discrimination. Native Americans were the victims of rules that were designed to exclude their participation in formal competition, and other discriminatory practices. Despite these impediments, Native Americans were able to adapt and find ways to keep their cultural fingerprint on the game as it expanded south into the United States by the turn of the twentieth century. Today, Haudenosaunee players are some of the most recognizable in the game at all levels. They are the first indigenous nation to play under their own flag in international competition in 1990 and was the first indigenous nation to host a world championship in 2015. This paper examines the cultural importance of lacrosse to the Haudenosaunee, its significance as a connection to their ancient past in a modern world, and that lacrosse can provide a microcosm into Native-white relations in the late nineteenth and early twentieth centuries and the adaptions that were made to secure their place in the sport’s future as it grows in popularity

Inflight and ground-based simulation of handling qualities of very large airplanes in landing approach

Inflight and ground based simulation of Boeing 367-80 variable stability aircraft handling qualities during landing approac

Linearized inverse scattering based on seismic Reverse Time Migration

In this paper we study the linearized inverse problem associated with imaging of reflection seismic data. We introduce an inverse scattering transform derived from reverse-time migration (RTM). In the process, the explicit evaluation of the so-called normal operator is avoided, while other differential and pseudodifferential operator factors are introduced. We prove that, under certain conditions, the transform yields a partial inverse, and support this with numerical simulations. In addition, we explain the recently discussed 'low-frequency artifacts' in RTM, which are naturally removed by the new method

Unemployment in Omaha in Relation to the Armour Closing

On September 29, 1967, Armour and. Company announced that effective six months from that date, the Omaha Armour plant would be closed, displacing a labor force of approximately 2, 200 workers. This statement, announcing the closing of the third meatpacking firm in Omaha within the past two years, was startling and indicative of far- reaching consequences for Omaha, its people and economy. Numerous social agencies, along with the Chamber of Commerce and the Nebraska Employment Service, became involved in joining together in a united effort through the development of their own organization-- ACT, the Armour Coordinating Team. ACT is an ad hoc committee designed to assess and coordinate support for solution to the anticipated problems inherent in a mass lay-off

Laser-heated rocket studies

CW laser heated rocket propulsion was investigated in both the flowing core and stationary core configurations. The laser radiation considered was 10.6 micrometers, and the working gas was unseeded hydrogen. The areas investigated included initiation of a hydrogen plasma capable of absorbing laser radiation, the radiation emission properties of hot, ionized hydrogen, the flow of hot hydrogen while absorbing and radiating, the heat losses from the gas and the rocket performance. The stationary core configuration was investigated qualitatively and semi-quantitatively. It was found that the flowing core rockets can have specific impulses between 1,500 and 3,300 sec. They are small devices, whose heating zone is only a millimeter to a few centimeters long, and millimeters to centimeters in radius, for laser power levels varying from 10 to 5,000 kW, and pressure levels of 3 to 10 atm. Heat protection of the walls is a vital necessity, though the fraction of laser power lost to the walls can be as low as 10% for larger powers, making the rockets thermally efficient