Theory of the pulse response from a small antenna in a magnetized plasma

The electrostatic plasma response to a small pulsed antenna in a magnetic field is analyzed. The ringing of the plasma at three discrete frequencies--the upper-hybrid frequency and two resonance cone branch frequencies--is evidenced, and the amplitudes of these frequency responses is determined as a function of the characteristic plasma frequencies, the angle of observation with respect to the magnetic field, and the pulse length. Applications to plasma diagnostics are discussed. It is shown that the upper hybrid response and the response at either of the resonance cone branch frequencies is adequate information to determine the plasma density, and the magnetic field magnitude and angle

Spinarc gas tungsten arc torch holder

Semiautomatic welding torch enables operator to control arc length, torch angle, and spring tension when welding small diameter aluminum tubing. Tungsten is preset for the weld to make arc initiation easier and to eliminate searching for the joint through a dark welding lens

Teasing Mollie

https://digitalcommons.library.umaine.edu/mmb-vp/6217/thumbnail.jp

Exploring the Origins of Carbon in Terrestrial Worlds

Given the central role of carbon in the chemistry of life, it is a fundamental question as to how carbon is supplied to the Earth, in what form and when. We provide an accounting of carbon found in solar system bodies, in particular a comparison between the organic content of meteorites and that in identified organics in the dense interstellar medium (ISM). Based on this accounting identified organics created by the chemistry of star formation could contain at most ~15% of the organic carbon content in primitive meteorites and significantly less for cometary organics, which represent the putative contributors to starting materials for the Earth. In the ISM ~30% of the elemental carbon is found in CO, either in the gas or ices, with a typical abundance of ~10^-4 (relative to H2). Recent observations of the TW Hya disk find that the gas phase abundance of CO is reduced by an order of magnitude compared to this value. We explore a solution where the volatile CO is destroyed via a gas phase processes, providing an additional source of carbon for organic material to be incorporated into planetesimals and cometesimals. This chemical processing mechanism requires warm grains (> 20 K), partially ionized gas, and sufficiently small <10 micron grains, i.e. a larger total grain surface area, such that freeze-out is efficient. Under these conditions static (non-turbulent) chemical models predict that a large fraction of the carbon nominally sequestered in CO can be the source of carbon for a wide variety of organics that are present as ice coatings on the surfaces of warm pre-planetesimal dust grains.Comment: 19 pages, 7 figures, to appear in Faraday Disc., vol 168, 2014, DOI: 10.1039/C4FD00003

The Woolen Industry of the Midwest

Through the study of a regional industry, the book illustrates the impact of an expanding national market on a previously isolated market, offering new insights into a pioneer industry in the West and into the business methods and procedures of the time. The book discusses the growth of a myriad of small processing and manufacturing plants which drew raw materials from, and geared production and sales to that local economy, enjoying as they did, protection from eastern competitors who were saddled with high freight rates. The book demonstrates that once urbanization occurred in the region, bringing it into the national market, the local industries declined rapidly, disappearing in less than a generation. Perceptive, challenging, the book opens new possibilities for the study of manufacturing on the regional level. Norman L. Crockett is an associate professor of history at the University of Oklahoma.https://uknowledge.uky.edu/upk_united_states_history/1056/thumbnail.jp

The Black Towns

Norman L. Crockett (1934–2015) was professor emeritus of history at the University of Oklahoma, where he taught from 1969 until his retirement in 1998. He wrote, co-edited, and coauthored several books, including The Power Elite in America and The Woolen Industry of the Midwest.This Kansas Open Books title is funded by a grant from the National Endowment for the Humanities and the Andrew W. Mellon Foundation Humanities Open Book Program.From Appomattox to World War I, Black Americans continued their quest for a secure position in the American system. The problem was how to be both black and American—how to find acceptance, or even toleration, in a society in which the boundaries of normative behavior, the values, and the very definition of what it meant to be an American were determined and enforced by whites. A few black leaders proposed self-segregation inside the United States within the protective confines of an all-Black community as one possible solution. The Black-town idea reached its peak in the fifty years after the Civil War; at least sixty Black communities were settled between 1865 and 1915. Norman L. Crockett has focused on the formation, growth and failure of five such communities. The towns and the date of their settlement are: Nicodemus, Kansas (1879), established at the time of the Black exodus from the South; Mound Bayou, Mississippi (1897), perhaps the most prominent Black town because of its close ties to Booker T. Washington and Tuskegee Institute: Langston, Oklahoma (1891), visualized by one of its promoters as the nucleus for the creation of an all-Black state in the West; and Clearview (1903) and Boley (1904), in Oklahoma, twin communities in the Creek Nation which offer the opportunity observe certain aspects of Indian-Black relations in this area. The role of Blacks in town promotion and settlement has long been a neglected area in western and urban history, Crockett looks at patterns of settlement and leadership, government, politics, economics, and the problems of isolation versus interaction with the white communities. He also describes family life, social life, and class structure within the black towns. Crockett looks closely at the rhetoric and behavior of blacks inside the limits of their own community—isolated from the domination of whites and freed from the daily reinforcement of their subordinate rank in the larger society. He finds that, long before “Black is beautiful” entered the American vernacular, Black-town residents exhibited a strong sense of race price. The reader observes in microcosm Black attitudes about many aspects of American life as Crockett ties the Black-town experience to the larger question of race relations at the turn of the century. This volume also explains the failure of the Black-town dream. Crockett cites discrimination, lack of capital, and the many forces at work in the local, regional, and national economies. He shows how the racial and town-building experiment met its demise as the residents of all-Black communities became both economically and psychologically trapped. This study adds valuable new material to the literature on black history, and makes a significant contribution to American social and urban history, community studies, and the regional history of Kansas, Oklahoma, and Mississippi

The Black Towns

From Appomattox to World War I, Black Americans continued their quest for a secure position in the American system. The problem was how to be both black and American—how to find acceptance, or even toleration, in a society in which the boundaries of normative behavior, the values, and the very definition of what it meant to be an American were determined and enforced by whites. A few black leaders proposed self-segregation inside the United States within the protective confines of an all-Black community as one possible solution. The Black-town idea reached its peak in the fifty years after the Civil War; at least sixty Black communities were settled between 1865 and 1915. Norman L. Crockett has focused on the formation, growth and failure of five such communities. The towns and the date of their settlement are: Nicodemus, Kansas (1879), established at the time of the Black exodus from the South; Mound Bayou, Mississippi (1897), perhaps the most prominent Black town because of its close ties to Booker T. Washington and Tuskegee Institute: Langston, Oklahoma (1891), visualized by one of its promoters as the nucleus for the creation of an all-Black state in the West; and Clearview (1903) and Boley (1904), in Oklahoma, twin communities in the Creek Nation which offer the opportunity observe certain aspects of Indian-Black relations in this area. The role of Blacks in town promotion and settlement has long been a neglected area in western and urban history, Crockett looks at patterns of settlement and leadership, government, politics, economics, and the problems of isolation versus interaction with the white communities. He also describes family life, social life, and class structure within the black towns. Crockett looks closely at the rhetoric and behavior of blacks inside the limits of their own community—isolated from the domination of whites and freed from the daily reinforcement of their subordinate rank in the larger society. He finds that, long before “Black is beautiful” entered the American vernacular, Black-town residents exhibited a strong sense of race price. The reader observes in microcosm Black attitudes about many aspects of American life as Crockett ties the Black-town experience to the larger question of race relations at the turn of the century. This volume also explains the failure of the Black-town dream. Crockett cites discrimination, lack of capital, and the many forces at work in the local, regional, and national economies. He shows how the racial and town-building experiment met its demise as the residents of all-Black communities became both economically and psychologically trapped. This study adds valuable new material to the literature on black history, and makes a significant contribution to American social and urban history, community studies, and the regional history of Kansas, Oklahoma, and Mississippi. Description Norman L. Crockett (1934–2015) was professor emeritus of history at the University of Oklahoma, where he taught from 1969 until his retirement in 1998. He wrote, co-edited, and coauthored several books, including The Power Elite in America and The Woolen Industry of the Midwest. This Kansas Open Books title is funded by a grant from the National Endowment for the Humanities and the Andrew W. Mellon Foundation Humanities Open Book Program.https://digitalcommons.pittstate.edu/kansas_open_books/1014/thumbnail.jp

MUSCULOSKELETAL STRENGTH, FALL AND FRACTURE RISK IN EARLY POSTMENOPAUSAL WOMEN

Purpose: To evaluate the course of recovery in fall-risk and functional status over the first year following a distal radius fracture (DRF), and evaluate differences in fall and fracture risk factors in women over the age of 50 years with a DRF compared to their non-fractured peers. Methods: Two cohorts of participants volunteered in two sub-studies of the thesis. The first was seventy-eight women recruited from a DRF Clinic within the first week after their fracture, and followed up in concert with standard clinic appointments at week three, nine, 12, 26, and 52 post-fracture. The second cohort consisted of women aged 50 years or older, with and without a recent distal radius fracture, being at least 6 months post-DRF, but no more than 2 years post-fracture. Seventy-seven women age 50-78 with (Fx, n = 32) and without (NFx = 45) a history of DRF were assessed on two occasions within 4 weeks apart using a battery of fall and fracture risk tools, including balance, mobility, gait speed, fracture risk assessment, as well as bone quality assessment using peripheral quantitative computer tomography (pQCT) and dual x-ray absorptiometry (DXA). Results: Fall-risk status (strength, balance, mobility) gradually improved over the first year post-fracture, with balance confidence remaining high even immediately post-fracture. In the second study, women with a recent DRF, compared to women without, demonstrated higher fall and fracture risk. Women with a recent DRF had lower bone and muscle strength in both the upper and lower extremities compared to the non-fractured controls, with no differences in DXA derived aBMD at the femoral neck or spine. Significance of findings: The results of these studies will help clinicians understand the normal course of functional recovery post-fracture, and assist in determining appropriate fall risk assessment and interventions for post-menopausal women at risk of fragility fracture. Results demonstrate the importance of studying women at risk of DRF as an important first indicator of bone fragility and risk of future fracture. These findings also strengthen the notion that DXA alone may not be the best predictor for fracture risk

Wave emissions from planetary magnetospheres

An important development in the Earth magnetosphere was the discovery of the boundary of the plasma sheet and its apparent role in the dynamics of the magnetotails. Three instabilities (negative energy mode, counterstreaming, and the Buneman instability) were investigated through analytical and numerical studies of their frequency and growth rate as a function of the angle of propagation

Toward Partisan Politics in a Professional Association: Utility of the Candidates Poll

The purpose of this paper is to describe the initial efforts of one local chapter, The Puget Sound Chapter; to engage in partisan politics by the conduct of a poll of candidates for election to the Washington State Legislature in 1974. Properly speaking, the Chapter endorsed no candidates, merely rated them from weak to outstanding on their agreement with NASW policies on relevant programs and their social welfare attitudes. Thus, it is a mild form of partisan politics that will be considered. The paper will analyze the social and organizational context in which the candidates\u27 poll occurred, and then report on the advantages and shortcomings of the poll as a technique for the assessment of political candidates. Finally, there will be a brief commentary on the functions of the professional association in the politicalization of the activities of organized social workers