Digital Commons Network^™

Slow Spin Relaxation In Two-Dimensional Electron Systems With Antidots, Yuriy V. Pershin Dr, Vladimir Privman

Faculty Publications

We report a Monte Carlo investigation of the effect of a lattice of antidots on spin relaxation in twodimensional electron systems. The spin relaxation time is calculated as a function of geometrical parameters describing the antidot lattice, namely the antidot radius and the distance between their centers. It is shown that spin polarization relaxation can be efficiently suppressed by the chaotic spatial motion due to the antidot lattice. This phenomenon offers a new approach to spin coherence manipulation in spintronics devices.

Electronic Structure Of Nuclear-Spin-Polarization-Induced Quantum Dots, Yuriy V. Pershin Dr

Faculty Publications

We study a system in which electrons in a two-dimensional electron gas are confined by a nonhomogeneous nuclear-spin polarization. The system consists of a heterostructure that has nonzero nuclei spins. We show that in this system electrons can be confined into a dot region through a local nuclear-spin polarization. The nuclear-spin-polarization-induced quantum dot has interesting properties indicating that electron energy levels are time dependent because of the nuclear-spin relaxation and diffusion processes. Electron confining potential is a solution of diffusion equation with relaxation. Experimental investigations of the time dependence of electron energy levels will result in more information about nuclear-spin …

Comments On Hilbert Transform Based Signal Analysis, David G. Long

Faculty Publications

The use of the Hilbert transform for time/frequency analysis of signals is briefly considered. While the Hilbert transform is based on arbitrary continuous signals, most practical signals are digitially sampled and time-limited. To avoid aliasing in the sampling process the signals must also be bandlimited. It is argued that it is reasonable to consider such sampled signals as periodic (this is the basis of the Discrete Fourier Transform [DFT]) since any other interpretation is inconsistent. A simple derivation of the Hilbert transform for a sampled, periodic is then given. It is shown that the instantaneous frequency can be easily computed …

Evaluating The Effect Of Rain On Seawinds Scatterometer Measurements, David G. Long, David Draper

Faculty Publications

A simple wind/rain backscatter model is used with co-located precipitation radar (PR) data from the Tropical Rainfall Measuring Mission (TRMM) satellite to evaluate the effect of rain on SeaWinds on QuikSCAT σ° observations. The model incorporates wind-induced surface scattering, the surface rain perturbation, and atmospheric rain attenuation and scattering. The co-located PR measurements afford direct computation of SeaWinds-scale averaged rain rate and atmospheric rain attenuation and scattering. An estimate of the wind-induced surface backscatter is computed via numerical weather prediction (NWP) winds. By synergistically combining the SeaWinds, NWP, and PR data, estimates of surface rain perturbation and combined surface/atmospheric scattering …

Output Gap Uncertainty And Monetary Policy During The 1970s, David E. Spencer

Faculty Publications

The conduct of monetary policy during the 1970s was greatly complicated by systematic real-time misperceptions of the state of economic activity as measured by the output gap. Employing real-time data and using the Taylor rule as an analytical framework, I explore the implications of utilizing alternative observable proxies for the unobservable output gap. I compare the counterfactual paths for the federal funds rate generated under each proxy with the actual path of the federal funds rate and a benchmark ("ideal") path implied by a full information Taylor rule. Results suggest that these real-time proxies would have resulted in better policy …

Boron Alloying In Gan, Gus L. W. Hart, Laurian Escalanti

Faculty Publications

Using first-principles calculations in the local density approximation, we studied effects of adding up to 6% boron to zinc-blende GaN. We found that the band gap increases monotonically with boron incorporation, in agreement with experiment. A composition-independent band-gap bowing parameter of 4.30 eV was determined, and proved to be large compared to bowing for other mixed cation systems. The formation enthalpy of mixing, ΔH, was determined for BxGa1-xN, BxGa1-xAs, and GaAs1-xNx. A comparison of enthalpies indicates that the production of BxGa1-xN films with boron concentrations of at least 5% may be possible.

Fiscal Decentralization In The Czech And Slovak Republics: A Comparative Study Of Moral Hazard, Phillip J. Bryson, Gary C. Cornia, Gloria E. Wheeler

Faculty Publications

Fiscal decentralization has provided neither the benefits of decentralization nor an independent revenue source for subnational governments in the Czech and Slovak Republics. In Slovakia, political conditions early in the transition led to the relative neglect of revenue transfers from the center. This produced financial stress but also encouraged greater fiscal independence for local governments. It also forced them to seek maximal property tax revenues. The Czech Republic made more substantial transfers to local governments, but the development of fiscal autonomy was stifled as transfers reduced the need for own-source local revenues. The Czech real estate tax has remained nominal …

Wide-Band/Dual-Band Packaged Antenna For 5-6 Ghz Wlan Application, Mohammod Ali, Tuangsit Sittironnarit, Huan-Sheng Hwang, Robert A. Sadler, Gerard James Hayes

Faculty Publications

A wide-band/dual-band packaged antenna is proposed for wireless local-area network (WLAN) applications in the 5.15-5.35 GHz and 5.725-5.825 GHz frequency range. The antenna is internal to the housing of a personal digital assistant, such as a Palm organizer, and has the dimensions of 28 by 9 by 3 ram on an FR4 substrate. The antenna meets or exceeds the bandwidth requirements for the dual-band IEEE 802.11a WLAN applications (5.15-5.35 GHz and 5.725-5.825 GHz) within 2:1 voltage standing-wave ratio.

President's Page, Samantha K. Hastings

Faculty Publications

No abstract provided.

Laboratory Project In Wireless Fsk Receiver Design, Michael A. Jensen, Cynthia Fuse, Raymond Woodward

Faculty Publications

This paper describes a wireless local area network laboratory project that provides senior and first-year graduate students in microwave engineering courses the opportunity to design, build, and test several passive microstrip components and integrate them into a working system. Students design filters, couplers, amplifiers, diode detectors, quarter-wave transformers, antennas, and stub matching networks in weekly labs that parallel-lectures in a one-semester microwave engineering course. This paper also describes simple inexpensive prototyping and testing methods that have been used in this course. Laboratory materials and technical details of the design are provided on the web for students and educators.

Androgen Receptor Expression In The Rat Prostate Is Down-Regulated By Dietary Phytoestrogens, Edwin D. Lephart, Trent D. Lund, Daniel J. Munson, Herman Aldercreutz, Robert J. Handa

Faculty Publications

Background- It is well established that the growth of the prostate gland is a hormone-dependent phenomenon involving both androgenic and estrogenic control. Proliferation of prostate cells is, at least in part, under control of estrogen receptor beta (ER-beta). Phytoestrogens bind ER-beta with high affinity and therefore may have antiproliferative effects in the prostate. Methods- The prostates of male Long-Evans rats fed a diet high in phytoestrogens (Phyto-600) or very low levels of phytoestrogens (Phyto-free) were analyzed to determine the impact of dietary phytoestrogens on prostate weight and androgen receptor (AR) expression in the prostate. Results- Dietary phytoestrogens significantly decreased post-pubertal …

Energy Conserving Approximations To The Quantum Potential: Dynamics With Linearized Quantum Force, Sophya Garashchuk, Vitaly A. Rassolov

Faculty Publications

Solution of the Schrödinger equation within the de Broglie–Bohm formulation is based on propagation of trajectories in the presence of a nonlocal quantum potential. We present a new strategy for defining approximate quantum potentials within a restricted trial function by performing the optimal fit to the log-derivatives of the wave function density. This procedure results in the energy-conserving dynamics for a closed system. For one particular form of the trial function leading to the linear quantum force, the optimization problem is solved analytically in terms of the first and second moments of the weighted trajectory distribution. This approach gives exact …

No Child Left Behind: Flowers Don’T Grow In The Desert, William T. Armaline, D Levy

Faculty Publications

No abstract provided.

Review Of Little Detours: The Letters And Plays Of Luise Gottsched, By Susanne Kord, Carol A. Leibiger

Faculty Publications

No abstract provided.

Transportation Rates, Monopsony Power And The Location Decision Of The Firm, Yeung-Nan Shieh, C.N. Yeh

Faculty Publications

No abstract provided.

Snake (Colubridae: Thamnophis) Predatory Responses To Chemical Cues From Native And Introduced Prey Species, Stephen J. Mullin, Hélène Imbert, Jennifer M. Fish, Edward L. Ervin, Robert N. Fisher

Faculty Publications

Several aquatic vertebrates have been introduced into freshwater systems in California over the past 100 years. Some populations of the two-striped garter snake (Thamnophis hammondii) have lived in sympatry with these species since their introduction; other populations have never encountered them. To assess the possible adaptation to a novel prey, we tested the predatory responses of T. hammondii from different populations to different chemosensory cues from native and introduced prey species. We presented chemical extracts from potential prey types and 2 control odors to individual snakes on cotton swabs and recorded the number of tongue flicks and attacks …

Symbolic Counter-Speech, Howard M. Wasserman

Faculty Publications

No abstract provided.

Resisting Marriage And Renouncing Womanhood: The Choice Of Taiwanese Buddhist Nuns, Hillary Crane

Faculty Publications

The traditional Chinese perception of Buddhist monastics is that they choose to renounce the world out of desperation — after failing in the world such that their only options are suicide or the monastery. That this perception of the monastic life persists in Taiwan today is evident in monastics’ own descriptions of their families’ responses to their choice as well as in several recent scandals related to monastic life. Despite the widespread negative perception of monastics, increasing numbers of women are choosing this life. Drawing on extensive fieldwork with relatively new monastics, the author explores the choice Buddhist nuns make …

Can States Prohibit Municipalities From Offering Commercial Telephone Services To The Public?, Ralph C. Anzivino

Faculty Publications

No abstract provided.

Appellate Courts, Historical Facts, And The Civil-Criminal Distinction, Chad M. Oldfather

Faculty Publications

The standard justification for the general prohibition against the evaluation of facts by appellate courts centers on those courts' perceived incompetence, relative to trial-level fact finders, to engage in the task. This Article examines that justification and finds it wanting. While trial courts and juries are indeed better-positioned to assess much of what takes place at trial, this advantage is not universal. An appellate court's access to and reliance on a transcript of the proceedings below confers on it certain advantages not only because it aids in information retention, but also because its textual basis allows the court to perform …

Multiculturalism And The Future Of Tribal Sovereignty, Scott C. Idleman

Faculty Publications

American Indian tribes would appear to be natural constituents and beneficiaries of the multiculturalism movement. Their members are generally conceptualized as racial or ethnic minorities; they have endured social and legal oppression and continue to encounter structural and even intentional discrimination; and, not least importantly, they possess genuinely different cultures and consequently add diverse perspectives to society. Despite this apparent fit, this Article questions the extent to which tribes and tribal members actually should align themselves with multicultural proponents and initiatives. The basis for this inquiry is that, unlike other societal subgroups, each recognized tribe is a distinct geopolitical entity …

The New Mexico Uniform Trust Code, David M. English

Faculty Publications

This article provides an overview of the New Mexico UTC, focusing on how its enactment either changes or clarifies existing New Mexico law.

Spotlight: Response To Violence Against Women At The University Of Missouri At Columbia, Mary M. Beck

Faculty Publications

The University of Missouri (“MU”) sits in the picturesque college town of Columbia on the largest and oldest campus of the Missouri University system. MU is a land grant institution created with funds and land appropriated by the Morrill Acts of 1862 and 1890. The University “honors [that public trust] and accepts the associated accountability” by acquiring, creating, transmitting, and preserving knowledge. “MU's primary mission in research and doctoral education . . . provides the basis for service to the people of [Missouri] via outreach programs.” Domestic violence impacts MU's land grant influenced service mission. Its organizational departments, educational units, …

The Ethics Of Using Judges To Conceal Wrongdoing, John P. Freeman

Faculty Publications

No abstract provided.

Who Bears The Costs Of A Lawyer's Mistakes? -- Against Limited Liability, Martin Mcwilliams

Faculty Publications

No abstract provided.

A Wolf In Sheep's Clothing: Wolf V. Ashcroft And The Constitutionality Of Using Mpaa Ratings To Censor Films In Prison, Colin Miller

Faculty Publications

No abstract provided.

Bringing In The State: Toward A Constitutional Duty To Protect From Mob Violence, Susan S. Kuo

Faculty Publications

Mob violence can inflict devastating costs. Although typically wrought by private individuals, the incidence of riot as well as extent of riot harm often turn on the adequacy of police preparation and planning. Under the English common law, local governments were responsible for providing riot protection for their denizens. In keeping with the English tradition, early state laws in the United States also provided for communal riot responsibility, and when the states ratified the Fourteenth Amendment, state obligations in the riot context were well-established. Despite the common law underpinnings of the governmental duty to protect citizens from mob violence, however, …

Taxing The New Intellectual Property Right, Xuan-Thao Nguyen, Jeffrey A. Maine

Faculty Publications

How should the acquisition of domain names be treated under the current tax regime for intellectual property? This article proposes that domain names that function as source identifiers should be treated under the tax regime applicable to trademarks. Generic domain names, however, possess inherent goodwill that dictates different treatment.

Taking Another Ride On Flopper: Benjamin Cardozo, Safe Space, And The Cultural Significance Of Coney Island, Robert N. Strassfeld

Faculty Publications

This article examines the history and cultural meaning of Coney Island and its amusement parks, as well as Cardozo's biography, in an effort to discover the basis for that feeling of contempt. It shows that a variety of attributes of Coney Island, most notably its embrace of what was, for its day, a robust and open sexuality and carnival spirit, were alien and threatening to Cardozo's Victorian values. It also shows how this clash of values would have naturally inclined Cardozo to think of Coney Island as a dangerous place and led him to Murphy's assumption of risk analysis. It …

Is There A Place For Race As A Legal Concept, Sharona Hoffman

Faculty Publications

What does "race" mean? The word "race" is omnipresent in American social, political, and legal discourse. The concept of "race" is central to contemporary debate about affirmative action, racial profiling, hate crimes, health inequities, and many other issues. Nevertheless, the best research in genetics, medicine, and the social sciences reveals that the concept of "race" is elusive and has no reliable definition.

This article argues that "race" is an unnecessary and potentially pernicious concept. As evidenced by the history of slavery, segregation, the Holocaust, and other human tragedies, the idea of "race" can perpetuate prejudices and misconceptions and serve as …