Digital Commons Network^™

Invasive Birds In Iowa: Status, Problems, And Threats, James J. Dinsmore

Journal of the Iowa Academy of Science: JIAS

A total of 18 invasive bird species has been introduced into or have expanded their range to include Iowa. These include ten non-North American species, one North American species that has been displaced and now is established in Iowa, and seven native species that have been released to reestablish Iowa populations. Twelve of those are regularly occurring species in Iowa, and they comprise 3.0% (12 of 404) of the species known from Iowa and 5% (10 of 199) of Iowa's nesting avifauna. These percentages are similar to those found in neighboring states. Several more species are likely to become established …

Index For The Journal Of The Iowa Academy Of Science Volume 108 And Erratum

Journal of the Iowa Academy of Science: JIAS

No abstract provided.

Back Cover

Journal of the Iowa Academy of Science: JIAS

No abstract provided.

Techniques For The Regeneration Of Wideband Speech From Narrowband Speech, Jason A. Fuemmeler, Russell C. Hardie, William R. Gardner

Electrical and Computer Engineering Faculty Publications

This paper addresses the problem of reconstructing wideband speech signals from observed narrowband speech signals. The goal of this work is to improve the perceived quality of speech signals which have been transmitted through narrowband channels or degraded during acquisition. We describe a system, based on linear predictive coding, for estimating wideband speech from narrowband. This system employs both previously identified and novel techniques. Experimental results are provided in order to illustrate the system’s ability to improve speech quality. Both objective and subjective criteria are used to evaluate the quality of the processed speech signals.

Operational Report 2001, University Of Montana--Missoula

University of Montana Annual Financial Reports, 1918-2012

University of Montana annual financial report for fiscal year ending June 30, 2001.

Engendered By Technologies, Anita Bernstein

North Carolina Law Review

No abstract provided.

Utb/Tsc This Week 2001-12, University Of Texas At Brownsville And Texas Southmost College. Office Of News And Information

UTB/TSC Archives - This Week Newsletter

No abstract provided.

Money And The Monetization Of Credit, Martin Shubik

Cowles Foundation Discussion Papers

The relationship between money and credit is discussed in terms of network linkage. Fiat money is the only instrument with the universal recognition of its issuer. Near monies such as bank money and money substitutes such as gasoline credit cards can be classified in terms of their network links. This leads to a way of considering the velocity of money.

Develping Consensus Indicators Of Sustainability For Southeastern United States Aquaculture (Bulletin #879), Rex H. Caffey, Richard F. Kazmierczak, James W. Avault

LSU AgCenter Bulletins

This study investigates whether diverse aquaculture interest groups can collectively agree on ways to coordinate this resource use by developing goals and indicators of aquaculture sustainability. Specifically, this study used aquaculture experts from the production, research, regulatory and public interest sectors to identify and weight a broad range of indicators of aquaculture sustainability in the southeastern United States.

Discrete Maximum Principle For Nonsmooth Optimal Control Problems With Delays, Boris S. Mordukhovich, Ilya Shvartsman

Mathematics Research Reports

We consider optimal control problems for discrete-time systems with delays. The main goal is to derive necessary optimality conditions of the discrete maximum principle type in the case of nonsmooth minimizing functions. We obtain two independent forms of the discrete maximum principle with transversality conditions described in terms of subdifferentials and superdifferentials, respectively. The superdifferential form is new even for non-delayed systems and may be essentially stronger than a more conventional subdifferential form in some situations.

Computer Sound Card Assisted Measurements Of The Acoustic Doppler Effect For Accelerated And Unaccelerated Sound Sources, Thomas J. Bensky, S. E. Frey

Physics

An approach to experimentally measuring the speed of a moving object by direct application of the Doppler effect for sound is discussed. The method presented here uses a Windows computer and sound card to record Doppler shifted sound from a moving source. This sound card approach allows for direct acquisition of Doppler shifted sound intensity as a function of time, affording much analytical and pedagogical freedom in undergraduate lab instruction. In addition, the acquisition of such data allows for the experimental study of not only constant velocity sound sources, but of accelerated sound sources as well.

Deploying Integrated Web-Based Spatial Applications Within An Oracle Database Environment, James Carswell

Conference papers

In this paper, we describe the architectural and functional characteristics of e-Spatial™ technology, comprising an innovative software package that represents a timely alternative to traditional and complex proprietary GIS application packages. The two main components of the package, developed by e- Spatial Solutions, are the iSMART™ database development technology and the i-Spatial™ Information Server (iSIS), both implemented within an Oracle 9i Spatial database environment. This technology allows users to build and deploy spatially enabled or standard Internet applications without requiring any application-specific source code. It can be deployed on any Oracle supported hardware platform and on any device that supports …

The Speech And Language Characteristics Of One Child With Brachmann-De Lange Syndrome, Kelli Mickelson

Theses and Dissertations

Brachmann-de Lange syndrome is a dysmorphogenic disorder that has been characterized by multiple congenital abnormalities. Individuals with this syndrome commonly have mild to severe cognitive involvement. Commonly, speech and language presents a challenge to this population.

One individual diagnosed with Brachmann-de Lange syndrome has been administered a battery of speech, language, and hearing assessments to determine his communicative understanding, intent, and ability. The parents of this individual volunteered and willingly agreed to participate in the study.

Results of this study help to provide some common speech and language characteristics of one child with Brachmann de Lange syndrome. Expressive and receptive …

Colorimetric Tolerances Of Various Digital Image Displays, Jason Gibson

Theses

Visual experiments on four displays (two LCD, one CRT and hardcopy) were conducted to determine colorimetric tolerances of images systematically altered via three different transfer curves. The curves used were: Sigmoidal compression in L*, linear reduction in C*, and additive rotations in hab. More than 30 observers judged the detectability of these alterations on three pictorial images for each display. Standard probit analysis was then used to determine the detection thresholds for the alterations. It was found that the detection thresholds on LCD's were similar or lower than for the CRT's in this type of experiment. Summarizing pixel-by-pixel image differences …

A Little Soul Food, Please, Rita Puishes

The Prairie Light Review

No abstract provided.

Existence Of Solutions Of The Classical Yang-Baxter Equation For A Real Lie Algebra, Jorg Feldvoss

University Faculty and Staff Publications

We characterize finite-dimensional Lie algebras over the real numbers for which the classical Yang-Baxter equation has a non-trivial skew-symmetric solution (resp. a non-trivial solution with invariant symmetric part). Equivalently, we obtain a characterization of those finite-dimensional real Lie algebras which admit a non-trivial (quasi-) triangular Lie bialgebra structure.

Electronic-Structure Modifications Induced By Surface Segregation In La0.65Pb0.35Mno3 Thin Films, C.N. Borca, B. Xu, T. Komesu, H.-K. Jeong, M.T. Liu, Sy_Hwang Liou, Shane Stadler, Y. Idzerda, Peter A. Dowben

Sy-Hwang Liou Publications

Using spin-polarized inverse photoemission and X-ray absorption spectroscopy techniques, we show that the electronic structure of La_0.65Pb_0.35MnO₃ thin films depends on the composition at the surface. With a gentle annealing procedure, the surface provides a maximum of 80% spin asymmetry at 0.5 eV above the Fermi level in spite of extensive Pb segregation. A heavily annealed (restructured) surface exhibits a reduced surface "ordering" temperature of 240 K (compared to the approximately 335 K bulk value) as well as a reduced spin asymmetry value of 40% at 0.5 eV above Fermi energy.

A Case Study Of The 8 March 1999 Freezing Rain Event For North Platte, Nebraska, Shari Mutchler

United States Department of Commerce: Staff Publications

During the morning hours of 8 March 1999, freezing precipitation fell over portions of western Nebraska, including the communities of McCook, North Platte and Valentine between midnight and 10:00 A.M. CST. The freezing precipitation resulted in dangerous travel conditions, causing several automobile accidents, along with the delay and temporary closing of area public schools 8 March 1999. The freezing rain changed over to snow later the same morning.
A forecast for snow, rather than freezing precipitation, was issued by the local forecast office. The forecast issued was based predominately on numerical weather prediction guidance, and the observed temperature profile of …

2001-12-01 Minutes And Appendices, Longwood University

Board of Visitors Meeting Minutes 1964-

No abstract provided.

Robust Decentralized Control Of Power Systems Through Excitation Systems And Thyristor Controlled Series Capacitors, Lingling Fan

Graduate Theses, Dissertations, and Problem Reports (ETD)

The objective of this work is robust decentralized control of power systems through excitation systems and Thyristor Controlled Series Capacitors (TCSC). Hence the dissertation consists of two parts. In the first part an algorithm for the design of nonlinear decentralized excitation control is developed based on a feedback linearization technique. Feedback linearization technique is applied in excitation control of each generator to obtain an interconnected system where subsystems have linear system matrices and interconnections are represented by nonlinear terms. Different ways of achieving decentralization are investigated: (1) linear robust control combined with observer decoupled state space; (2) disturbance accommodation control. …

Large -Eddy Simulation Of Ship Wakes, Shaoping Shi

Graduate Theses, Dissertations, and Problem Reports (ETD)

The objective of the present study is to improve our understanding of turbulent wake flows. Large-Eddy Simulation (LES) technique is applied for this purpose. A readily available code was used with necessary modifications. Three dimensional incompressible Navier-Stokes equations are solved in non-orthogonal curvilinear coordinates. Finite-volume approach is implemented on a non-staggered grid. The core of the numerical scheme is a fractional step method. The overall accuracy of the method is second order in both space and time.;The LES approach has been validated for four cases: channel flow, flow past a square body, a shear layer flow, and open channel flow. …

Fast Focal Length Solution In Partial Panoramic Image Stitching, William A. Barrett, Kirk L. Duffin

Faculty Publications

Accurate estimation of effective camera focal length is crucial to the success of panoramic image stitching. Fast techniques for estimating the focal length exist, but are dependent upon a close initial approximation or the existence of a full circle panoramic image sequence. Numerical solutions of the focal length demonstrate strong coupling between the focal length and the angles used to position each component image about the common spherical center. This paper demonstrates that parameterizing panoramic image positions using spherical arc length instead of angles effectively decouples the focal length Ji.om the image position. This new parameterization does not require an …

Effect Of Rare Locally Ordered Regions On A Disordered Itinerant Quantum Antiferromagnet With Cubic Anisotropy, Rajesh S. Narayanan, Thomas Vojta

Physics Faculty Research & Creative Works

We study the quantum phase transition of an itinerant antiferromagnet with cubic anisotropy in the presence of quenched disorder, paying particular attention to the locally ordered spatial regions that form in the Griffiths region. We derive an effective action where these rare regions are described in terms of static annealed disorder. A one-loop renormalization-group analysis of the effective action shows that for order-parameter dimensions p<4, the rare regions destroy the conventional critical behavior, and the renormalized disorder flows to infinity. For order-parameter dimensions p>4, the critical behavior is not influenced by the rare regions; it is described by the conventional dirty cubic fixed point. We also discuss the influence of the rare regions on the fluctuation-driven first-order transition …

A Novel Neural Oscillator And Its Implementation In Analog Vlsi, Qiang Luo, John G. Harris

Electrical and Computer Engineering Faculty Research & Creative Works

This paper presents a novel neural oscillator model that is inspired by biological oscillation models and is easily implemented in subthreshold analog CMOS VLSI. The proposed model uses local coupling among neuron units. Synchrony and information propagation are demonstrated in chains and rings of the oscillators. © 2001 IEEE.

Comparison Of Instream Methods For Measuring Hydraulic Conductivity In Sandy Streambeds, Matthew K. Landon, David L. Rus, F. Edwin Harvey

School of Natural Resources: Faculty Publications

Streambed hydraulic conductivity (K) values were determined at seven stream transects in the Platte River Basin in Nebraska using different instream measurement techniques. Values were compared to determine the most appropriate technique(s) for use in sandy streambeds. Values of K determined from field falling- and constant-head permeameter tests analyzed using the Darcy equation decreased as permeameter diameter increased. Seepage meters coupled with hydraulic gradient measurements failed to yield K values in 40% of the trials. Consequently, Darcy permeameter and seepage meter tests were not preferred approaches. In the upper 0.25 m of the streambed, field falling- and constant-head permeameter tests …

Effects Of Binary Combinations Of Herbicides On Freshwater Algae, Jill K. Taylor

School of Natural Resources: Dissertations, Theses, and Student Research

No abstract provided.

Table Of Contents, Vol. 20, No. 2, December 2001

Bridgewater Review

No abstract provided.

Bridgewater Review, Vol. 20, No. 2, December 2001

Bridgewater Review

No abstract provided.

The Effect Of Volatility On Wealth Transfer Strategies In Light Of The 2001 Tax Act, David J. Wolfert

William & Mary Annual Tax Conference

No abstract provided.

Employee Benefits For The Closely Held Business, Lisa C. Germano

William & Mary Annual Tax Conference

No abstract provided.