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2007

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A Note On The Karp-Lipton Collapse For The Exponential Hierarchy, Chris Bourke Jan 2007

A Note On The Karp-Lipton Collapse For The Exponential Hierarchy, Chris Bourke

School of Computing: Technical Reports

We extend previous collapsing results involving the exponential hierarchy by using recent hardness-randomness trade-off results. Specifically, we show that if the second level of the exponential hierarchy has polynomial-sized circuits, then it collapses all the way down to MA.

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A Two-Phase Approach For Dynamic Lightpath Scheduling In Wdm Optical Networks, Lu Shen, Xi Yang, Ajay Todimala, Byrav Ramamurthy Jan 2007

A Two-Phase Approach For Dynamic Lightpath Scheduling In Wdm Optical Networks, Lu Shen, Xi Yang, Ajay Todimala, Byrav Ramamurthy

School of Computing: Conference and Workshop Papers

Lightpath scheduling is an important capability in next-generation wavelength-division multiplexing (WDM) optical networks to reserve resources in advance for a specified time period while provisioning end-to-end lightpaths. In a dynamic environment, the end user requests for dynamic scheduled lightpath demands (D-SLDs) need to be serviced without the knowledge of future requests. Even though the starting time of the request may be hours or days from the current time, the end-user however expects a quick response as to whether the request could be satisfied. We propose a two-phase approach to dynamically schedule and provision D-SLDs. In the first phase, termed the …

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The Elasticity Of Taxable Income Over The 1980s And 1990s, Seth H. Giertz Jan 2007

The Elasticity Of Taxable Income Over The 1980s And 1990s, Seth H. Giertz

Department of Economics: Faculty Publications

Taxable (and broad) income elasticities are estimated using tax return data from 1979 to 2001. Data from the Continuous Work History Survey (CWHS) yield an estimated taxable income elasticity for the 1990s that is about half the corresponding 1980s estimate. Estimates from the full Statistics of Income, which heavily over-samples high–income filers, generally confirm the CWHS results. More sophisticated income control brings the estimates for the two decades closer together—to 0.40 for the 1980s and 0.26 for the 1990s. Work by Kopczuk (2005) implies that the narrowing of the tax base since 1986 could account for 14 to 29 percent …

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Us And Them: Identity And Genocide, David Moshman Jan 2007

Us And Them: Identity And Genocide, David Moshman

Department of Educational Psychology: Faculty Publications

Genocide is commonly deemed to be either inexplicable or the result of special hatreds. I argue instead that genocide is an extreme result of normal identity processes. Four overlapping phases are proposed. (1) Dichotomization elevates one dimension of identity over others and, within that dimension, sharply distinguishes two categories: us and them. This may lead to (2) dehumanization, in which “they” come to be seen not just as different from “us” but as outside the human universe of moral obligation. (3) Destruction may result, accompanied and followed by processes of (4) denial that enable the perpetrators to maintain their moral …

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Preservation And Erosion Of Theropod Tracks In Eolian Deposits: Examples From The Middle Jurassic Entrada Sandstone, Utah, U.S.A., Jesper Milán, David B. Loope Jan 2007

Preservation And Erosion Of Theropod Tracks In Eolian Deposits: Examples From The Middle Jurassic Entrada Sandstone, Utah, U.S.A., Jesper Milán, David B. Loope

Department of Earth and Atmospheric Sciences: Faculty Publications

The Middle Jurassic Entrada Sandstone, exposed near the town of Escalante, southern Utah, consists of large-scale cross-bedded eolian deposits that are interbedded with horizontally laminated sand sheets and thin sets of eolian cross-strata, representing periods with a moister climate. The flat-bedded units contain numerous tracks and trackways from small to large-sized theropod dinosaurs. These tracks are today exposed in several distinct erosional states, allowing detailed studies of track and undertrack formation in eolian deposits. Tracks that originally were emplaced on sloping surfaces show, in their present-day erosional state, a morphology distinct from those originally emplaced on horizontal surfaces. Further, the …

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Dinosaur Tectonics: A Structural Analysis Of Theropod Undertracks With A Reconstruction Of Theropod Walking Dynamics, Ole Graversen, Jesper Milán, David B. Loope Jan 2007

Dinosaur Tectonics: A Structural Analysis Of Theropod Undertracks With A Reconstruction Of Theropod Walking Dynamics, Ole Graversen, Jesper Milán, David B. Loope

Department of Earth and Atmospheric Sciences: Faculty Publications

A dinosaur trackway in the Middle Jurassic eolian Entrada Sandstone of southern Utah, U.S.A., exposes three undertracks that we have modeled as isolated tectonic regimes showing the development of fold-thrust ramp systems induced by the dinosaur’s feet. The faulted and folded sequence is comparable to crustal-scale tectonics associated with plate tectonics and foreland fold-thrust belts. A structural analysis of the dinosaur tracks shows the timing and direction of the forces exercised on the substrate by the animal’s foot during the stride. Based on the structural analysis, we establish a scenario for foot movements and weight distribution in the feet. During …

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Quantitative Analysis Of The Calcareous Nannofossil Assemblages From Ciros-1, Victoria Land Basin, Antarctica, David K. Watkins Jan 2007

Quantitative Analysis Of The Calcareous Nannofossil Assemblages From Ciros-1, Victoria Land Basin, Antarctica, David K. Watkins

Department of Earth and Atmospheric Sciences: Faculty Publications

The lower portion of the CIROS-1 core (McMurdo Sound, Antarctica) has been cited as evidence for Late Eocene continental glaciation on Antarctica. A reassessment of this age determination is warranted in the face of mounting evidence from multiple proxies that continental glaciation was initiated by rapid ice-growth during the earliest Oligocene. Examination of calcareous nannofossil assemblages from this section confirmed very low fossil abundance, low species richness, and the presence of reworked taxa. A minimum of 37% of the total species richness in the section comprises reworked forms, including Late Cretaceous and latest Paleocene to Middle Eocene species. Quantitative analysis …

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Evaluation Of The Streambed Leakage Concept In Analytical Models Using Data From Three Pumping Tests, Sefan J. Kollet, Vitaly A. Zlotnik Jan 2007

Evaluation Of The Streambed Leakage Concept In Analytical Models Using Data From Three Pumping Tests, Sefan J. Kollet, Vitaly A. Zlotnik

Department of Earth and Atmospheric Sciences: Faculty Publications

Two-dimensional analytical models of pumping induced drawdown and stream depletion account for the streambed properties and stream geometry. Using data from three pumping tests performed under various hydrologic conditions, the following hypotheses were tested: (1) a partially penetrating stream at a certain distance from the pumping well can be represented by the streambed leakage term in the analytical models; (2) in the streambed leakage term, the streambed conductance coefficient λ=(WK′)/m′ accounts for the average stream width W, the streambed thickness m′, and hydraulic conductivity K′. The first hypothesis was tested by comparing results from tests under flow and no-flow stream …

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Stream Network Characteristics Used To Infer The Distribution Of Fold Types In The Zagros Simply Folded Belt, Iran, Caroline M. Burberry, John W. Cosgrove, Jian Guo Liu Jan 2007

Stream Network Characteristics Used To Infer The Distribution Of Fold Types In The Zagros Simply Folded Belt, Iran, Caroline M. Burberry, John W. Cosgrove, Jian Guo Liu

Department of Earth and Atmospheric Sciences: Faculty Publications

Progressive deformation at a convergent margin (the Zagros Simply Folded Belt) was analysed using satellite images, digital elevation models, contour maps and artificially generated stream networks. Two end-member fold types (fault-bend folds and detachment folds) interact with streams flowing from the High Zagros Mountains into the Persian Gulf. Growing folds divert streams and create wind or water gaps in characteristic patterns which are related to the uplift histories of the two fold types. Additionally, the symmetry of minor channels reflects the inherent symmetry of the folds. The distribution of fold types is shown for the region N27°- N30°, E50°-E54° at …

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Changes In Ceo Compensation Structure And The Impact On Firm Performance Following Ceo Turnover, David W. Blackwell, Donna M. Dudney, Kathleen A. Farrell Jan 2007

Changes In Ceo Compensation Structure And The Impact On Firm Performance Following Ceo Turnover, David W. Blackwell, Donna M. Dudney, Kathleen A. Farrell

Department of Finance: Faculty Publications

We document changes in compensation structure following CEO turnover and relate them to future performance. Compared to outgoing CEOs, incoming CEOs derive a significantly greater percentage of their compensation from option grants and new stock grants. The voluntary turnover sample shows similar changes in compensation structure while the forced turnover sample results suggest that new stock grants drive the significant increase in incentive compensation following turnover. Post-turnover performance is positively associated with new stock grants as a percentage of total compensation in the full sample and when analyzing forced and voluntary turnovers separately. We find limited evidence that future operating …

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Modeling Annual Extreme Precipitation In China Using The Generalized Extreme Value Distribution, Song Feng, Saralees Nadarajah, Qi Hu Jan 2007

Modeling Annual Extreme Precipitation In China Using The Generalized Extreme Value Distribution, Song Feng, Saralees Nadarajah, Qi Hu

Department of Earth and Atmospheric Sciences: Faculty Publications

Extreme precipitation events are the major causes of severe floods in China. In this study, four time series of daily, 2-day, 5-day, and 10-day annual maximum precipitation from 1951 to 2000 at 651 weather stations in China were analyzed. The generalized extreme value (GEV) distribution was used, to model the annual extreme precipitation events at each station. The GEV distribution was also modified to explore the linear temporal trends in the extreme events. The results showed that more than 12% of the stations have significant (p-value < 0.10) linear trends. Decreasing trends are mainly observed in northern China, and increasing trends are observed in the Yangtze River basin and northwestern China. The return periods of extreme participation have changed stations with significant temporal trends. The 50-year event observed in parts of the Yangtze River basin, and northwestern China during the 1951-60, has become a more frequent 25-year event in the 1990s. The spatial distribution of the return levels of the 651 stations are closely related to the climatic mean precipitation, and are influenced by the East Asian summer monsoon system (return levels are measures of extremity – for example, a 10 year return level is the value that can be expected to be exceeded on average once in every 10 years). The return period of extreme precipitation, that caused the 1998 severe floods in the Yangtze River basin, was also evaluated from a probabilistic perspective.

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Lithostratigraphy Of The Late Early Permian (Kungurian) Wandrawandian Siltstone, New South Wales: Record Of Glaciation?, S. G. Thomas, Christopher R. Fielding, Tracy D. Frank Jan 2007

Lithostratigraphy Of The Late Early Permian (Kungurian) Wandrawandian Siltstone, New South Wales: Record Of Glaciation?, S. G. Thomas, Christopher R. Fielding, Tracy D. Frank

Department of Earth and Atmospheric Sciences: Faculty Publications

The late Early Permian (273–271 Ma) Wandrawandian Siltstone in the southern Sydney Basin of New South Wales represents a marine highstand that can be correlated over 2000 km. A mainly fine-grained terrigenous clastic succession, the Wandrawandian Siltstone contains evidence for cold, possibly glacial conditions based on the presence of outsized clasts and glendonites, mineral pseudomorphs after ikaite, a mineral that forms in cold (0–7°C) marine sediments. A lithostratigraphic and facies analysis of the unit was conducted, based on extensive coastal outcrops and continuous drill-cores. Eight facies associations were identified: (i) siltstone; (ii) siltstone with minor interbedded sandstone; (iii) interbedded tabular …

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The Legacy Of Loving, Joanna L. Grossman, John Dewitt Gregory Jan 2007

The Legacy Of Loving, Joanna L. Grossman, John Dewitt Gregory

Faculty Journal Articles and Book Chapters

The Supreme Court sounded the death knell for anti-miscegenation laws in Loving v. Virginia in 1967. This essay, published in honor of Loving's fortieth anniversary, considers the personal, cultural, and legal legacy of the decision, which brought an abrupt end to the practice of outlawing interracial marriage. But since those laws were already on the way out at the time Loving was decided, its legacy must be constructed by looking more broadly at its impact on American law and society. That exploration reveals first a powerful personal legacy for Mildred and Richard Loving, who were permitted to return to Virginia …

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Self-Injury And The School Counselor, Carla J. Wosoba Jan 2007

Self-Injury And The School Counselor, Carla J. Wosoba

Graduate Research Papers

Self-injury is an issue that has increasingly attracted the attention of school counselors in recent years. School counselors have daily contact with students and are thus an important resource for working with adolescents who self-injure. This paper provides an overview of self-injury including demographics and risk factors, followed by ethical considerations for school counselors such as confidentiality, professional competence, and referral. The school counselor's role is addressed, providing suggestions for assessment, prevention, and interventions for use with students who self-injure.

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Asteroseismology Of The Pg 1159 Star Pg 0122+200, Jianning Fu, Matt A. Wood Jan 2007

Asteroseismology Of The Pg 1159 Star Pg 0122+200, Jianning Fu, Matt A. Wood

Aerospace, Physics, and Space Science Faculty Publications

Context. The variable pre-white dwarf PG 1159 stars (GW Vir) are g-mode non-radial pulsators. Asteroseismology puts strong constraints on their global parameters and internal structure. PG 0122+200 defines the red edge of the instability strip and its evolutionary timescale is predicted to be dominated by neutrino emission. Its study offers the opportunity to better understand the instability mechanism and to validate the physics of the neutrino production in dense plasma. Aims. To achieve such a goal requires determining precisely its fundamental parameters. This is the goal of this paper. Methods. We present new multi-site photometric observations obtained in 2001 and …

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Spectropolarimetric Survey Of Hydrogen-Rich White Dwarf Stars, Adéla Kawka, Stéphane Vennes, Gary D. Schmidt, Dayal T. Wickramasinghe, Rolf Koch Jan 2007

Spectropolarimetric Survey Of Hydrogen-Rich White Dwarf Stars, Adéla Kawka, Stéphane Vennes, Gary D. Schmidt, Dayal T. Wickramasinghe, Rolf Koch

Aerospace, Physics, and Space Science Faculty Publications

We have conducted a survey of 61 southern white dwarfs searching for magnetic fields using Zeeman spectropolarimetry. Our objective is to obtain a magnetic field distribution for these objects and, in particular, to find white dwarfs with weak fields. We found one possible candidate (WD 0310-688) that may have a weak magnetic field of -6.1 ±2.2 kG. Next, we determine the fraction and distribution of magnetic white dwarfs in the solar neighborhood and investigate the probability of finding more of these objects based on the current incidence of magnetism in white dwarfs within 20 pc of the Sun. We have …

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Imaging Body Structure And Mapping Brain Function: A Historical Approach, Stacey A. Tovino Jan 2007

Imaging Body Structure And Mapping Brain Function: A Historical Approach, Stacey A. Tovino

Faculty Articles

Now in its second decade, functional magnetic resonance imaging (fMRI) localizes changes in blood oxygenation that occur in the brain when an individual performs a mental task. Physicians and scientists use fMRI not only to map sensory, motor, and cognitive functions, but also to study the neural correlates of a range of sensitive and potentially stigmatizing conditions, behaviors, and characteristics. Poised to move outside the traditional clinical and research contexts, fMRI raises a number of ethical, legal, and social issues that are being explored within a burgeoning neuroethics literature. In this Article, I place these issues in their proper historical …

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Considerations For The Diagnosis Of Personality Disorders In Adolescents, Katherine J. Young-Kent Jan 2007

Considerations For The Diagnosis Of Personality Disorders In Adolescents, Katherine J. Young-Kent

Graduate Research Papers

The diagnosis of personality disorders in adolescents is a controversial idea. Personality disorders can bring about a stigma and may create effects on quality of life. Developmental implications should be considered when diagnosing adolescents with personality disorders, or any other mental illness, due to the incomplete formation of identity during adolescent years. There is also evidence that attachment patterns may influence personality disorder symptoms and should also be considered as a way to conceptualize personality in general. The current diagnostic systems may not provide a complete framework from which to conceptualize adolescents and ideas for restructuring the diagnostic system is …

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Counseling Children Of Alcoholics In Schools, Melinda Voss Jan 2007

Counseling Children Of Alcoholics In Schools, Melinda Voss

Graduate Research Papers

Children of alcoholics (CO As) make up a large population of students in the school system. These youth are at high risk for behavioral, emotional, social, safety, and academic problems due to the dysfunction within their homes. This paper will identify (a) the definition and prevalence of children of alcoholics, (b) the effects of parental alcohol abuse on children, (c) possible signs and symptoms displayed by COAs, and (d) implications for school counselors to best meet the needs of these students. School counselors can assist this population by providing the skills and support needed to cope effectively with parental alcoholism …

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Lawyering In The Little Way Of St. Therese Of Lisieux With Complete Abandonment And Love, Michael A. Scaperlanda Jan 2007

Lawyering In The Little Way Of St. Therese Of Lisieux With Complete Abandonment And Love, Michael A. Scaperlanda

Faculty Articles

No abstract provided.

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Opting Out: Procedural Fair Use, Michael Mattioli Jan 2007

Opting Out: Procedural Fair Use, Michael Mattioli

Articles by Maurer Faculty

This article explores the advantages of opt-out plans, and identifies a critical shortcoming in Copyright's doctrine of Fair Use. The discussion is fueled by a current controversy: In December of 2004, Google, Inc. announced its plan to digitally scan thousands of copyrighted books as part of a massive new digital indexing service. Hedging against possible litigation, Google provided a free and easy opt-out procedure for authors who didn't want their books scanned. Despite this measure, two major authors' groups have sued Google, claiming the opt-out plan imposes an unfair burden. This article explores the fairness of established opt-outs in contract …

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In Memorium: Brian Douglas Tittemore, Robert Goldman Jan 2007

In Memorium: Brian Douglas Tittemore, Robert Goldman

Human Rights Brief

No abstract provided.

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Center News/Faculty And Staff Updates, Human Rights Brief Jan 2007

Center News/Faculty And Staff Updates, Human Rights Brief

Human Rights Brief

No abstract provided.

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The Michigan Guidelines On Protection Elsewhere, Colloquium On Challenges In International Refugee Law Jan 2007

The Michigan Guidelines On Protection Elsewhere, Colloquium On Challenges In International Refugee Law

Other Publications

Refugees increasingly encounter laws and policies which provide that their protection needs will be considered or addressed somewhere other than in the territory of the state where they have sought, or intend to seek, protection. Such policies-including "country of first arrival," "safe third country," and extraterritorial processing rules and practices-raise both opportunities and challenges for international refugee law. They have the potential to respond to the Refugee Convention's concern "that the grant of asylum may place unduly heavy burdens on certain countries" by more fairly allocating protection responsibilities among states. But insistence that protection be provided elsewhere may also result …

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Soil-Applied Nitrogen And Composted Manure Effects On Soybean Hay Quality And Grain Yield, James J. Heitholt, David Kee, John J. Sloan, C. T. Mackown, Sue Metz, Ava L. Kee, Russell L. Sutton Jan 2007

Soil-Applied Nitrogen And Composted Manure Effects On Soybean Hay Quality And Grain Yield, James J. Heitholt, David Kee, John J. Sloan, C. T. Mackown, Sue Metz, Ava L. Kee, Russell L. Sutton

United States Department of Agriculture-Agricultural Research Service / University of Nebraska-Lincoln: Faculty Publications

Grain yield in many soybean experiments fails to respond to fertilizer nitrogen (N). A few positive responses have been reported when soybean were grown in the southern U.S., when N was applied near flowering and when biosolids were added. In a previous study, low N concentrations of soybean forage in north Texas on a high pH calcareous soil were reported and thus, we suspected a N nutrition problem. Consequently, we initiated this study to determine whether selected preplant N sources broadcast and incorporated into a Houston Black clay (fine, smectitic, thermic Udic Haplusterts) might increase forage N concentration, forage yield, …

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Simulation Study Of The Competitive Ability Of Erect, Semi-Erect, And Prostrate Cowpea (Vigna Unguiculata) Genotypes, G. Wang, M. E. Mcgiffen Jr., John L. Lindquist, J. D. Ehlers, I. Sartorato Jan 2007

Simulation Study Of The Competitive Ability Of Erect, Semi-Erect, And Prostrate Cowpea (Vigna Unguiculata) Genotypes, G. Wang, M. E. Mcgiffen Jr., John L. Lindquist, J. D. Ehlers, I. Sartorato

Department of Agronomy and Horticulture: Faculty Publications

Ecophysiological simulation models provide a quantitative method to predict the effects of management practices, plant characteristics, and environmental factors on crop and weed growth and competition. The INTERCOM interplant competition model was parameterized, calibrated by monoculture data for three cowpea (Vigna unguiculata) genotypes that differed in growth habit, common sunflower (Helianthus annuus) and common purslane (Portulaca oleracea), and used to simulate competition of cowpea cover crops with sunflower or purslane. The simulation results were compared with observations from field competition experiments in 2003 and 2004. INTERCOM more accurately simulated actual field data for the …

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Quantification Of Steroid Sex Hormones Using Solid-Phase Extraction Followed By Liquid Chromatography-Mass Spectrometry, Youssef Filali-Meknassi, Muriel Auriol, Craig D. Adams, Rao Y. Surampalli Jan 2007

Quantification Of Steroid Sex Hormones Using Solid-Phase Extraction Followed By Liquid Chromatography-Mass Spectrometry, Youssef Filali-Meknassi, Muriel Auriol, Craig D. Adams, Rao Y. Surampalli

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

In this study, the occurrence of trace amounts of natural and synthetic steroid estrogens in the aquatic environment was studied using liquid chromatography coupled with electrospray mass spectrometry, following solid-phase extraction (SPE). the SPE was performed with C18 and NH2 cartridges. the first objective was to develop a reliable method for analyzing steroid estrogens (resulting from human and animal excretions) in different matrices. the method developed was then applied to quantify the occurrence of natural and synthetic hormones (estrone [E1], 17β-estradiol [βE2], 17α-estradiol [αE2], estriol [E3], and 17α-ethinylestradiol [EE2]) in environmental samples in surface water and wastewater treatment plant (WWTP) …

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Demodulation Of Fiber-Optic Sensors For Frequency Response Measurement, Abdeq M. Abdi, Steve Eugene Watkins Jan 2007

Demodulation Of Fiber-Optic Sensors For Frequency Response Measurement, Abdeq M. Abdi, Steve Eugene Watkins

Electrical and Computer Engineering Faculty Research & Creative Works

The neural-network-based processing of extrinsic Fabry-Perot interferometric (EFPI) strain sensors was investigated for the special case of sinusoidal strain. The application area is modal or cyclic testing of structures in which the frequency response to periodic actuation must be demodulated. The nonlinear modulation characteristic of EFPI sensors produces well-defined harmonics of the actuation frequency. Relationships between peak strain and harmonic content were analyzed theoretically. A two-stage demodulator was implemented with a Fourier series neural network to separate the harmonic components of an EFPI signal and a backpropagation neural network to predict the peak-to-peak strain from the harmonics. The system performance …

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Error Performance Of Double Space Time Transmit Diversity Systems, Jingxian Wu, Y. Rosa Zheng, Ashwin Gumaste, Chengshan Xiao Jan 2007

Error Performance Of Double Space Time Transmit Diversity Systems, Jingxian Wu, Y. Rosa Zheng, Ashwin Gumaste, Chengshan Xiao

Electrical and Computer Engineering Faculty Research & Creative Works

The theoretical error performance of double space time transmit diversity (DSTTD) system with optimum combining receiver is analyzed in this paper. by employing both spatial multiplexing and transmit diversity in one system, DSTTD provides practical tradeoff between system spectral efficiency and diversity gain. We derive exact analytical expressions to describe the symbol error rate for DSTTD systems. The effects of both diversity gain and antenna interference introduced by spatial multiplexing are quantified in the results. In addition, the performance of DSTTD system with successive interference cancellation is also investigated. Simulation results are in excellent agreement with the theoretical results obtained …

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Implementation Of Static And Semi-Static Versions Of A Bit-Wise Pipelined Dual-Rail Ncl 2s Complement Multiplier, R. Sankar, V. Kadiyala, Ravi Bonam, S. Kumar, S. Mohan, F. Kacani, Waleed K. Al-Assadi, Scott C. Smith Jan 2007

Implementation Of Static And Semi-Static Versions Of A Bit-Wise Pipelined Dual-Rail Ncl 2s Complement Multiplier, R. Sankar, V. Kadiyala, Ravi Bonam, S. Kumar, S. Mohan, F. Kacani, Waleed K. Al-Assadi, Scott C. Smith

Electrical and Computer Engineering Faculty Research & Creative Works

This paper focuses on implementing a 2s complement 8x8 dual-rail bit-wise pipelined multiplier using the asynchronous NULL Convention Logic (NCL) paradigm. The design utilizes a Wallace tree for partial product summation, and is implemented and simulated in VHDL, the transistor level, and the physical level, using a 1.8V 0.18,um TSMC CMOS process.The multiplier is realized using both static and semi-static Dualversions of the NCL gates; and these two implementations are compared in terms of area, power, and speed.

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