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Effects Of Relativity On The Time-Resolved Tunneling Of Electron Wave Packets, P Krekora, Q Su, Rainer Grobe

Faculty publications – Physics

We solve numerically the time-dependent Dirac equation for a quantum wave packet tunneling through a potential barrier. We analyze the spatial probability distribution of the transmitted wave packet in the context of the possibility of effectively superluminal peak and front velocities of the electron during tunneling. Both the Dirac and Schrodinger theories predict superluminal tunneling speeds. However, in contrast to the Dirac theory the Schrodinger equation allows a possible violation of causality. Based on an analysis of the tunneling process in full temporal and spatial resolution, we introduce an instantaneous tunneling speed that can be computed inside the potential barrier.

Nebraska's Test-Hole Drilling Program And Records, Duane R. Mohlman, Charles A. Flowerday

Conservation and Survey Division: Faculty and Staff Publications

No abstract provided.

Critical Wavelength For River Meandering, Boyd F. Edwards, D. H. Smith

All Physics Faculty Publications

A fully nonlinear modal analysis identifies a critical centerline wave number q_c for river meandering that separates long-wavelength bends, which grow to cutoff, from short-wavelength bends, which decay. Exact, numerical, and approximate analytical results for q_c rely on the Ikeda, Parker, and Sawai [J. Fluid Mech. 112, 363 (1981)] model, supplemented by dynamical equations that govern the river migration and length. Predictions also include upvalley bend migration at long times and a peak in lateral migration rates at intermediate times. Experimental tests are suggested.

State Of Tampa Bay 2000, Tampa Bay Regional Planning Council (Tbrpc)

Reports

This is the fourteenth edition of the "State of Tampa Bay" Report. It has been prepared by the Agency on Bay Management and funded by the Tampa Bay Regional Planning Council. The Report's primary purpose is to inform our legislators and the general public about the projects and programs underway around Tampa Bay and in its watershed, and the issues and challenges that faced us during 2000 or are expected in 2001.

Reducing Resistance To Diversity Through Cognitive Dissonance Instruction: Implications For Teacher Education, Elisabeth L. Mcfalls, Deirdre Cobb-Roberts

Educational and Psychological Studies Faculty Publications

Before admission to the college of education, students at a large, predominantly White public university in the Southeast are required to complete a state-mandated course on diversity issues. The purpose of this course is to introduce students to diversity and effective ways of addressing it in future classrooms as a result of changing demographics. Often, students experience resistance to diversity issues because their current understandings or beliefs may not coincide with the information presented in class. One psychological theory that can address this phenomenon is called cognitive dissonance. In the study reported here, the principles of cognitive dissonance theory are …

An Environmental Geochemical Study Of Connecticut Marsh Sediments, Nicole A. Heller, Michael A. Kruge, Johan C. Varekamp, Tabitha Zierzow

Department of Earth and Environmental Studies Faculty Scholarship and Creative Works

Core material from Spartina-dominated Housatonic and Connecticut River estuarine sites (ranging from low to high marsh) were investigated in order to test the hypothesis that organic and inorganic pollutants preferentially accumulate in the low marsh environment. Radiometric data indicate that the low marsh setting experienced sedimentation rates an order of magnitude greater than that of the mid to high marsh. The low marsh sediments from the Housatonic tend to have significantly higher concentrations of trace metals (e.g., Cu and Zn, likely contributed by brass mills formerly active upstream). Petrographic examination of the samples under reflected white and blue light …

Mba Students Played Key Role In Chaoticom First Unh Business Spinout, Janet Lathrop

Media Relations

No abstract provided.

The Prairie Naturalist Volume 33, No.1 March 2001

The Prairie Naturalist

VEGETATION STRUCTURE AND INVERTEBRATE BIOMASS OF CONVENTIONAL AND SUSTAINABLE SORGHUM FIELDS IN KANSAS ▪ R. J. Robel and C Xiong

MONTHLY OPEN-WATER BOTTOM TRAWLING AT TWO SOUTH DAKOTA LAKES ▪ B. G. Blackwell and M. L. Brown

WINTER SURVIVAL AND HOME RANGE OF FEMALE RING-NECKED PHEASANT IN RELATION TO FOOD' PLOTS ▪ A E. Gabbert, J. R. Purvis, L. D. Flake, and A P. Leif

THIRD BREEDING RECORD OF BLUE GROSBEAK IN NORTH DAKOTA ▪ K. H. Haas and C A Haas

EVIDENCE OF AMERICAN WOODCOCK NESTING IN SOUTHEASTERN NORTH DAKOTA ▪ F. Y Sargeant and G. A Sargeant

BOOK …

Phase Modulation At 125 Khz In A Michelson Interferometer Using An Inexpensive Piezoelectric Stack Driven At Resonance, Barbara M. Hoeling, Andrew D. Fernandez, Richard C. Haskell, Daniel C. Petersen

All HMC Faculty Publications and Research

Fast phase modulation has been achieved in a Michelson interferometer by attaching a lightweight reference mirror to a piezoelectric stack and driving the stack at a resonance frequency of about 125 kHz. The electrical behavior of the piezo stack and the mechanical properties of the piezo-mirror arrangement are described. A displacement amplitude at resonance of about 350 nm was achieved using a standard function generator. Phase drift in the interferometer and piezo wobble were readily circumvented. This approach to phase modulation is less expensive by a factor of roughly 50 than one based on an electro-optic effect.

Hexapod Herald - Vol. 13, No. 1, March 2001

Hexapod Herald and Other Entomology Department Newsletters

Welcome

Congratulations

Condolences

Grants

Publications

Travel

From the office

Calendar of events

ENTO 905 seminars

Awards presented at the North central Branch ESA meetings, 2001

Fractal Quasar Clouds, Mark Bottorff, Gary J. Ferland

Physics and Astronomy Faculty Publications

This paper examines whether a fractal cloud geometry can reproduce the emission-line spectra of active galactic nuclei (AGNs). The nature of the emitting clouds is unknown, but many current models invoke various types of magnetohydrodynamic confinement. Recent studies have argued that a fractal distribution of clouds, in which subsets of clouds occur in self-similar hierarchies, is a consequence of such confinement. Whatever the confinement mechanism, fractal cloud geometries are found in nature and may be present in AGNs too. We first outline how a fractal geometry can apply at the center of a luminous quasar. Scaling laws are derived that …

Natural Resources, Gender And Leadership, Smita Premchander

IIMB Management Review

Sustainable management of resources presents a great challenge and calls for strong leadership. Leaders are important as agents of change. They are able to motivate and increase the confidence of people, so that change can be achieved in organisations and in society. Leadership skills were once thought to be inborn but now it is recognised that they can be developed . The study of leadership has generated a vast amount of literature, most of which is in the context of organisational management. Most leadership theories are drawn from the corporate sector and their experiences.

The Mitigation Of Emotional Distress Damages, Eugene Kontorovich

University of Chicago Law Review

No abstract provided.

Flight Physician - March, 2001, Civil Aviation Medical Association

Browse all Civil Aviation Medical Association Newsletters

A seventeen page newsletter of the Civil Aviation Medical Association. The newsletter provided news about civil aviation medicine and information related to the organization.

High Mobility In N-Type Gan Substrates, A. Saxler, David C. Look, S. Elhamri, J. R. Sizelove, William C. Mitchel, C. M. Sung, S. S. Park, K. Y. Lee

Physics Faculty Publications

No abstract provided.

A Force Structuring Model For A Moderately-Sized Nato Country, Hakan Bal

Theses and Dissertations

The purpose of this research is to develop a mathematical model which will aid the decision-makers of a moderately-sized NATO country to develop their future force structure composition. As the number of alternatives grows, and as the consequences become more important and more uncertain, the force structuring decision becomes increasingly difficult. The valuable lessons of past experience cannot be ignored. However, when one considers the high rotation rates of most countries' air forces, the rapid change in technology and the vast array of options available, even the most experienced leaders need some assistance. Hence, decision support tools are needed to …

A Multi-Objective Decision Support Model For The Turkish Armed Forces Personnel Assignment System, Zubeyir Cimen

Theses and Dissertations

The Turkish Armed Forces (TAF) assign more than 25,000 active duty personnel annually. TAF wants to obtain maximum utilization of its personnel by assigning the right person to the right job at the right time, To accomplish this task, decision-makers and personnel assignment staff should consider conflicting multiple objectives that create the widely known problem called "personnel assignment problem". To assist in this complicated task from a quantitative perspective, a preemptive goal programming approach was used to develop an integer programming (IP) model to capture the multiple objectives flexibly and interactively. A realistic size IP problem with random data was …

Lanthorn, Vol. 35, No. 24, March 1, 2001, Grand Valley State University

Volume 35, August 24, 2000 - June 14, 2001

Lanthorn is Grand Valley State's student newspaper, published from 1968 to the present.

Outbound Authentication For Programmable Secure Coprocessors, S W. Smith

Computer Science Technical Reports

A programmable secure coprocessor platform can help solve many security problems in distributed computing. These solutions usually require that coprocessor applications be able to participate as full-fledged parties in distributed cryptographic protocols. Thus, to fully enable these solutions, a generic platform must not only provide programmability, maintenance, and configuration in the hostile field---it must also provide outbound authentication for the entities that result. A particular application on a particular untampered device must be able to prove who it is to a party on the other side of the Internet. To be effective, a secure outbound authentication service must closely mesh …

Order In Multiplicity: Aristotle On Text, Context, And The Rule Of Law, Maureen B. Cavanaugh

North Carolina Law Review

No abstract provided.

Monotone Preferences Over Information, Juan Dubra, Federico Echenique

Cowles Foundation Discussion Papers

We consider preference relations over information that are monotone: more information is preferred to less. We prove that, if a preference relation on information about an uncountable set of states of nature is monotone, then it is not representable by a utility function.

Wright State University College Of Engineering And Computer Science Bits And Pcs Newsletter, Volume 17, Number 6, March 2001, College Of Engineering And Computer Science, Wright State University

BITs and PCs Newsletter

An eight page newsletter created by the Wright State University College of Engineering and Computer Science that addresses the current affairs of the college.

Wright State University Libraries Access Newsletter March 2001, Wright State University Libraries

Access Newsletter

A four page newsletter created by Wright State University Libraries that addresses the current affairs of the Libraries.

Valuation Ratios And The Long-Run Stock Market Outlook: An Update, John Y. Campbell, Robert J. Shiller

Cowles Foundation Discussion Papers

The use of price–earnings ratios and dividend-price ratios as forecasting variables for the stock market is examined using aggregate annual US data 1871 to 2000 and aggregate quarterly data for twelve countries since 1970. Various simple efficient-markets models of financial markets imply that these ratios should be useful in forecasting future dividend growth, future earnings growth, or future productivity growth. We conclude that, overall, the ratios do poorly in forecasting any of these. Rather, the ratios appear to be useful primarily in forecasting future stock price changes, contrary to the simple efficient-markets models. This paper is an update of our …

March- April 2001, University Of North Dakota Alumni Association

ALL: UND Alumni Review Master List

March- April 2001 issue of "The University of North Dakota Alumni Review." 32 pages

Volume 84, Number 2

Norms Of Sums Of Squares, Robert W. Fitzgerald

Articles and Preprints

For a finite separable extension K/F of fields of characteristic not 2, the norm of a sum of 2ⁿ squares in K is a sum of 2ⁿ squares in F. We find explicit identities.

Taking Account Of The World As It Will Be: The Shifting Course Of U.S. Encryption Policy, Tricia E. Black

Federal Communications Law Journal

Encryption, understood on a basic level as the process of scrambling information to disguise its content, has been a topic of intense debate over the past decade because of Internet growth and well-founded concerns about online security. The encryption debate centers on striking an appropriate balance between national security concerns and the potential prosperity of the high-tech industry. The Clinton Administration played an important role in relaxing U.S. encryption policy. This Note argues that the dramatic shift in encryption policy resulted from a recognition of how the world will be in the digital age, and that strong, unregulated encryption technology …

Law, Economics, And The Skeleton Of Value Fallacy, Kyron Huigens

Articles

Experiments in the last decade or so have demonstrated persistent failures on the part of ordinary individuals rationally to pursue self-interest. The experiments pose serious challenges to economics, rational choice theory, and the law and economics school. Some experiments, for example, suggest an "endowment effect", that contradicts the Coase Theorem; the notion that, in the absence of transaction costs, goods will find their most efficient distribution regardless of their initial assignment. Cass Sunstein has collected a set of essays by economists and legal scholars exploring these challenges, in a volume entitled Behavioral Law and Economics.

A Dynamical Systems Investigation Of Lower Extremity Coordination During Running Over Obstacles, Nikolaos Stergiou, Jody L. Jensen, Barry T. Bates, Shane D. Scholten, George Tzetzis

Journal Articles

Objective. To investigate intralimb coordination during running over a level surface and over obstacles of three different heights.

Design. The phasing relationships between the foot and leg motions in the frontal plane, and the shank and thigh motions in the sagittal plane were used to compare patterns of coordination.

Background. The coordinated actions of lower extremity segments are necessary to absorb the impact forces generated during running. The behavioral patterns of these segments can be studied under changing task demands using analysis techniques from the Dynamical Systems Theory.

Methods. Ten subjects ran at their self-selected pace …

The Effects Of Buffer And Temperature Feedback On The Oceanic Uptake Of Co2, Chuixiang Yi, Peng Gong, Ming Xu, Ye Qi

Publications and Research

The feedback between climate and carbon cycle systems is critical to the prediction of future CO₂ concentration in the atmosphere and the capacity of the oceans to take up CO₂ from the atmosphere. We calculated the magnitudes of the potential feedback between the increase of atmospheric CO₂ concentration, the carbonate chemistry of the oceans (via a buffer factor), and the global temperature. We find that the magnitude of the buffer feedback depends strongly on the level of the dissolved inorganic carbon (DIC) in the oceans and increases rapidly with the increase of the atmospheric CO …