979 research outputs found

    2008 Florida Land Value Survey: Farmland Prices Down

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    FE798, a 6-page report by Rodney L. Clouser, Ronald Muraro, Laila Racevskis, Charles Moss, and Allen Morris, presents the results of a 2008 land value survey to estimate the value of different types of agricultural land for geographic regions of the state. Includes references. Published by the UF Department of Food and Resource Economics, April 2009. FE798/FE798: 2008 Florida Land Value Survey: Farmland Prices Down (ufl.edu

    "Allen Sees Mayors Race Drawn", March 19, 1969

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    Atlanta's outgoing Mayor Ivan Allen Jr. predicted that no major candidates, business-backed or Negro, will emerge to succeed him and named Vice Mayor Sam Massell, Alderman Rodney Cook, Alderman Everett Millican, Alderman Milton Farris, Alderman Cecil Turner, and former U.S. Rep. Charles L. Weltner as probable candidates, while stressing the need for Atlanta's White leadership to recognize it will have to deal with Black leaders in the future and that race will continue to dominate city government issues. 1 page

    Allen Rodney MacPherson

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    The Future of the Japanese Financial System

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    The purpose of this paper is to consider the strengths and weaknesses of the Japanese financial system and to propose possible changes for the future. The apparent reversal in opinions on the effectiveness of the Japanese and US financial systems in recent years suggests a long term view should be taken. All financial systems have problems in the short term and it is important not to put too much weight on these. Section 2 briefly considers the historical development and the current differences between the Japanese and US financial systems. Section 3 considers the functions of a financial system and how the Japanese and US systems have performed these functions. Suggestions for reforms for Japan are outlined in Section 4 and Section 5 contains concluding remarks. This paper was presented at the Financial Institutions Center's October 1996 conference on "

    Status of anadromous salmonids in Oregon coastal basins

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    Thomas E. Nickelson, Jay W. Nicholas, Alan M. McGie, Robert B. Lindsay, Daniel L. Bottom (Research and Development Section, Oregon Department of Fish and Wildlife), and Rodney J. Kaiser, Steven E. Jacobs (Ocean Salmon Management, Oregon Department of Fish and Wildlife).This archived document is maintained by the State Library of Oregon as part of the Oregon Documents Depository Program. It is for informational purposes and may not be suitable for legal purposes.Includes bibliographical references (pages 71-81).Mode of access: Internet from the Oregon Government Publications Collection.Text in English

    Exit plane plasma measurements of a low-power hydrazine arcjet

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    Made available in DSpace on 2011-05-07T14:24:50Z (GMT). No. of bitstreams: 2 license.txt: 4922 bytes, checksum: 910b249b4beec47e7ab768910c8f966f (MD5) 9625115.pdf: 7628850 bytes, checksum: eca10f4d93ed536c344189cbf8e7be5a (MD5) Previous issue date: 1996Electric propulsion systems, and electrothermal arcjets in particular, have received considerable attention as viable systems for satellite propulsion applications. Research in this area has been fueled by recent applications of low-power arcjets aboard geosynchronous communications satellites. Recent advances made in low power (1-2 kW) arcjet numerical modeling, coupled with the demonstrated utility of arcjet thrusters, make the validation of computational models through experimentation increasingly important.In this work, improved understanding of the flow processes in a 1-kW hydrazine constricted arcjet is achieved with multiple electrostatic probe surveys at the exit plane of a laboratory thruster. Quadruple, triple, and single electrostatic probe techniques are utilized for measurements of the electron temperature T\sb{\rm e}, electron density n\sb{\rm e}, and ratio of ion axial velocity to most probable thermal speed u\rm \sb{i}/C\rm \sb{m,H\sp+}. Three thruster specific power levels (19.8, 22.3, and 26.0 MJ/kg) are investigated by varying the thruster current and propellant mass flow rate. Centerline axial profiles of T\rm \sb{e} and n\rm \sb{e} are presented for 2.2-6.2 mm downstream of the exit plane, yielding T\rm \sb{e} \sim 7000 K and n\rm \sb{e} \sim 3.6\times10\sp{12} cm\sp{{-}3} near the thruster exit for P/m = 22.4 MJ/kg.Radial gradients in T\rm \sb{e} and n\rm \sb{e} for off-centerline measurement locations are shown to adversely affect the quadruple probe response in this region of the plume. The uniform plasma quadruple probe theory is modified to account for radial gradients in T\rm \sb{e} and n\rm \sb{e} over the probe radial dimension, and is used to extract exit plane radial T\rm \sb{e} and n\rm \sb{e} profiles from the raw probe data. These results indicate that the T\rm \sb{e} radial profile is much wider than that of n\rm \sb{e} at the thruster exit. Additionally, floating electrostatic probe measurements yield estimates of the radial electric-field profile at the thruster exit, implying the presence of a small amount of the thruster current (\sim2%) and ohmic heating downstream of the arcjet exit plane.A spatially-resolved time-of-flight electrostatic probe technique is developed and employed in this study for measurements of radial profiles of the plasma axial velocity u\rm \sb{i} at the arcjet exit plane. Results indicate that the centerline axial velocities vary from 5.5 to 8.0 km/s over the 19.8-26.0 MJ/kg range of specific powers investigated. The quadruple probe results (T\rm \sb{e}, n\rm \sb{e}, u\rm \sb{i}/c\rm \sb{m}), coupled with these independent measurements of plasma velocity u\rm \sb{i}, are used to determine the gas temperature T\rm \sb{g}. These results reveal significant thermal nonequilibrium effects (T\rm \sb{g}/T\rm \sb{e}<1) at the thruster exit.Exit plane probe measurements of n\rm \sb{e}, T\rm \sb{e} and T\rm \sb{g} are compared with previously reported experimental data in the nozzle interior and thruster far-field plume. Finally, the results of this study are used to evaluate the performance of a comprehensive nitrogen-hydrogen arcjet model developed recently by Megli (1995). Comparisons of the experimental and predicted results indicate general agreement for the plasma parameters measured in this study.Item marked as restricted to the 'UIUC Users [automated]' Group (id=2) by Howard Ding ([email protected]) on 2011-05-07T15:06:26Z Item is restricted indefinitely.Restriction data tranferred 2014-07-01T11:31:54-05:00 Original Data Group with Access UIUC Users [automated] Release Date: none Reason: ETDs are only available to UIUC Users without author permissionETDs are only available to UIUC Users without author permissionU of I Onl

    Exit plane plasma measurements of a low-power hydrazine arcjet

    No full text
    Electric propulsion systems, and electrothermal arcjets in particular, have received considerable attention as viable systems for satellite propulsion applications. Research in this area has been fueled by recent applications of low-power arcjets aboard geosynchronous communications satellites. Recent advances made in low power (1-2 kW) arcjet numerical modeling, coupled with the demonstrated utility of arcjet thrusters, make the validation of computational models through experimentation increasingly important.In this work, improved understanding of the flow processes in a 1-kW hydrazine constricted arcjet is achieved with multiple electrostatic probe surveys at the exit plane of a laboratory thruster. Quadruple, triple, and single electrostatic probe techniques are utilized for measurements of the electron temperature T\sb{\rm e}, electron density n\sb{\rm e}, and ratio of ion axial velocity to most probable thermal speed u\rm \sb{i}/C\rm \sb{m,H\sp+}. Three thruster specific power levels (19.8, 22.3, and 26.0 MJ/kg) are investigated by varying the thruster current and propellant mass flow rate. Centerline axial profiles of T\rm \sb{e} and n\rm \sb{e} are presented for 2.2-6.2 mm downstream of the exit plane, yielding T\rm \sb{e} \sim 7000 K and n\rm \sb{e} \sim 3.6\times10\sp{12} cm\sp{{-}3} near the thruster exit for P/m = 22.4 MJ/kg.Radial gradients in T\rm \sb{e} and n\rm \sb{e} for off-centerline measurement locations are shown to adversely affect the quadruple probe response in this region of the plume. The uniform plasma quadruple probe theory is modified to account for radial gradients in T\rm \sb{e} and n\rm \sb{e} over the probe radial dimension, and is used to extract exit plane radial T\rm \sb{e} and n\rm \sb{e} profiles from the raw probe data. These results indicate that the T\rm \sb{e} radial profile is much wider than that of n\rm \sb{e} at the thruster exit. Additionally, floating electrostatic probe measurements yield estimates of the radial electric-field profile at the thruster exit, implying the presence of a small amount of the thruster current (\sim2%) and ohmic heating downstream of the arcjet exit plane.A spatially-resolved time-of-flight electrostatic probe technique is developed and employed in this study for measurements of radial profiles of the plasma axial velocity u\rm \sb{i} at the arcjet exit plane. Results indicate that the centerline axial velocities vary from 5.5 to 8.0 km/s over the 19.8-26.0 MJ/kg range of specific powers investigated. The quadruple probe results (T\rm \sb{e}, n\rm \sb{e}, u\rm \sb{i}/c\rm \sb{m}), coupled with these independent measurements of plasma velocity u\rm \sb{i}, are used to determine the gas temperature T\rm \sb{g}. These results reveal significant thermal nonequilibrium effects (T\rm \sb{g}/T\rm \sb{e}<1) at the thruster exit.Exit plane probe measurements of n\rm \sb{e}, T\rm \sb{e} and T\rm \sb{g} are compared with previously reported experimental data in the nozzle interior and thruster far-field plume. Finally, the results of this study are used to evaluate the performance of a comprehensive nitrogen-hydrogen arcjet model developed recently by Megli (1995). Comparisons of the experimental and predicted results indicate general agreement for the plasma parameters measured in this study.U of I OnlyETDs are only available to UIUC Users without author permissio

    Why Was Australia So Rich?

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    Between 1870 and 1890 Australian incomes per capita were 40 percent or more above those in the United States. About half this gap is attributable to Australia's higher labor input per capita, and half to its higher labor productivity. The higher labor input is due in part to favorable demographic attributes stemming especially from the gold rush era, and partly to a favorable workforce participation rate. The higher labor productivity appears to result from an advantageous natural resource endowment. By 1914 the income lead over the U.S. had all but disappeared. This is ascribed to declines in Australia's advantages both in labor input per capita and in labor productivity. It is argued that these declines are due neither to the effects of the 1890s depression, nor to changes in trade policy, but to the transitory or unsustainable nature of Australia's earlier sources of income advantage.comparative growth, Australian economic history

    Single- and Multi-carrier Quadrature Amplitude Modulation: Principles and Applications for Personal Communications, WATM and Broadcasting: 2nd

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    Single- and Multi-carrier Quadrature Amplitude Modulation Principles and Applications for Personal Communications, WLANs and Broadcasting L. Hanzo Department of Electronics and Computer Science, University of Southampton, UK W. Webb Motorola, Arlington Heights, USA formerly at Multiple Access Communications Ltd, Southampton, UK T. Keller Ubinetics, Cambridge Technology Centre, Melbourn, UK formerly at Department of Electronics and Computer Science, University of Southampton, UK Motivated by the rapid evolution of wireless communication systems, this expanded second edition provides an overview of most major single- and multi-carrier Quadrature Amplitude Modulation (QAM) techniques commencing with simple QAM schemes for the uninitiated through to complex, rapidly-evolving areas, such as arrangements for wide-band mobile channels. Targeted at the more advanced reader, the multi-carrier modulation based second half of the book presents a research-orientated outlook using a variety of novel QAM-based arrangements. * Features six new chapters dealing with the complexities of multi-carrier modulation which has found applications ranging from Wireless Local Area Networks (WLAN) to Digital Video Broadcasting (DVB) * Provides a rudimentary introduction for readers requiring a background in the field of modulation and radio wave propagation * Discusses classic QAM transmission issues relevant to Gaussian channels * Examines QAM-based transmissions over mobile radio channels * Incorporates QAM-related orthogonal techniques, considers the spectral efficiency of QAM in cellular frequency re-use structures and presents a QAM-based speech communications system design study * Introduces Orthogonal Frequency Division Multiplexing (OFDM) over both Gaussian and wideband fading channels By providing an all-encompassing self-contained treatment of single- and multi- carrier QAM based communications, a wide range of readers including senior undergraduate and postgraduate students, practising engineers and researchers alike will all find the coverage of this book attractive

    Lawyer Advertising in the Electronic Age

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    The April 5, 2001 symposium consisted of an informal roundtable discussion for the presenters from 2:30-4:30 p.m., followed by a public evening program, from 6:00-8:30 p.m., which featured a role-playing portrayal of a mock disciplinary proceeding about a dispute over lawyer advertising. Participants in the roundtable discussion were: Ronald D. Rotunda, the Albert E. Jenner, Jr. Professor of Law at the University of Illinois College of Law; Louise L. Hill, Professor of Law at the Widener University School of Law; and William Hornsby, Legal Counsel to the American Bar Association, Commission on Responsibility in Client Development. The Moot Court program included William Hornsby, Legal Counsel to the American Bar Association, as prosecutor from the state bar\u27s disciplinary council; Tom Spahn as defense lawyer for the firm; Ted Allen as chair of disciplinary council; and Louise L. Hill, Ronald Rotunda, and William Spruill as disciplinary council members. Rodney A. Smolla, the George E. Allen Chair in Law at the University of Richmond School of Law served as program coordinator and moderator
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