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1997

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Far-Ultraviolet Absorption Lines In The Remnant Of Sn 1006, Chi-Chao Wu, D. Michael Crenshaw, Andrew J. S. Hamilton, Robert A. Fesen Mar 1997

Far-Ultraviolet Absorption Lines In The Remnant Of Sn 1006, Chi-Chao Wu, D. Michael Crenshaw, Andrew J. S. Hamilton, Robert A. Fesen

Dartmouth Scholarship

We have obtained a far-ultraviolet spectrum (1150-1600 Å) of a hot subdwarf star behind the remnant of supernova 1006 with the Faint Object Spectrograph (FOS) on the Hubble Space Telescope. The high-quality spectrum is used to test previous identifications of the strong absorption features discovered with the International Ultraviolet Explorer. These features have FWHM = 4000 (±300) km s-1 and are not at the rest wavelengths of known interstellar lines, as opposed to the broader (~8000 km s-1 FWHM) Fe II lines from the remnant centered at 0 km s-1 in near-UV FOS spectra. We …

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The Tully-Fisher Relation And H0, Riccardo Giovanelli, Martha P. Haynes, Luiz N. Da Costa, Wolfram Freudling, John Salzer, Gary Wegner Mar 1997

The Tully-Fisher Relation And H0, Riccardo Giovanelli, Martha P. Haynes, Luiz N. Da Costa, Wolfram Freudling, John Salzer, Gary Wegner

Dartmouth Scholarship

The use of the Tully-Fisher (TF) relation for the determination of H0 relies on the availability of an adequate template TF relation and of reliable primary distances. Here we use a TF template relation with the best available kinematical zero point, obtained from a sample of 24 clusters of galaxies extending to cz ~ 9000 km s-1, and the most recent set of Cepheid distances for galaxies fit for TF use. The combination of these two ingredients yields H0 = 69 ± 5 km s-1 Mpc-1. The approach is significantly more accurate than …

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Rationalism In Normative Budget Theory, Dan Williams Mar 1997

Rationalism In Normative Budget Theory, Dan Williams

Publications and Research

This paper concerns epistemological rationalism and the norms used by governments to instruct their officers to perform their duties. The particular duty I discuss here is preparation of and action on the budget. In this paper I use "rationalism" as the opposite of "empiricism." This rationalism does not refer to "'economic rationality," it refers to the method of attaining knowledge associated with introspection, logic, and a priori knowledge. It is opposed to the method of attaining knowledge associated with observation, experiment, and evidence. By "norms, “normative," and other related terms, I mean action guiding language. Four senses of normative are …

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The Devil And The One Drop Rule: Racial Categories, African Americans, And The U.S. Census, Christine B. Hickman Mar 1997

The Devil And The One Drop Rule: Racial Categories, African Americans, And The U.S. Census, Christine B. Hickman

Michigan Law Review

For generations, the boundaries of the African-American race have been formed by a rule, informally known as the "one drop rule," which, in its colloquial definition, provides that one drop of Black blood makes a person Black. In more formal, sociological circles, the rule is known as a form of "hypodescent" and its meaning remains basically the same: anyone with a known Black ancestor is considered Black. Over the generations, this rule has not only shaped countless lives, it has created the African-American race as we know it today, and it has defined not just the history of this race …

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Monte Carlo Simulations Of The Dynamical Behavior Of The Coulomb Glass, Torsten Wappler, Thomas Vojta, Michael Schreiber Mar 1997

Monte Carlo Simulations Of The Dynamical Behavior Of The Coulomb Glass, Torsten Wappler, Thomas Vojta, Michael Schreiber

Physics Faculty Research & Creative Works

We study the dynamical behavior of disordered many-particle systems with long-range Coulomb interactions by means of damage-spreading simulations. In this type of Monte Carlo simulation one investigates the time evolution of the damage, i.e., the difference of the occupation numbers of two systems, subjected to the same thermal noise. We analyze the dependence of the damage on temperature and disorder strength. For zero disorder the spreading transition coincides with the equilibrium phase transition, whereas for finite disorder we find evidence for a dynamical phase transition well below the transition temperature of the pure system.

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On The Qualitative Behavior Of Impurity-Based Splitting Rules I: The Minima-Free Property, Craig W. Codrington, Carla E. Brodley Mar 1997

On The Qualitative Behavior Of Impurity-Based Splitting Rules I: The Minima-Free Property, Craig W. Codrington, Carla E. Brodley

Department of Electrical and Computer Engineering Technical Reports

We show that all strictly convex n impurity measures lead to splits at boundary points, and furthermore show that certain rational splitting rules, notably the information gain ratio, also have this property. A slightly weaker result is shown to hold for impurity measures that are only convex n, such as Inaccuracy.

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Of Periods, Quasiperiods, Repetitions And Covers, Alberto Apostolico, Dany Breslauer Mar 1997

Of Periods, Quasiperiods, Repetitions And Covers, Alberto Apostolico, Dany Breslauer

Department of Computer Science Technical Reports

No abstract provided.

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Identification Of Spherical Virus Particles In Digitized Images Of Entire Electron Micrographs, Ioana M. Boier Martin, Dan C. Marinescu, Robert E. Lynch, Timothy S. Baker Mar 1997

Identification Of Spherical Virus Particles In Digitized Images Of Entire Electron Micrographs, Ioana M. Boier Martin, Dan C. Marinescu, Robert E. Lynch, Timothy S. Baker

Department of Computer Science Technical Reports

No abstract provided.

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Comprehensive Analysis Of Joints From Patient Clinical Data, Chandrajit L. Bajaj, Fausto Bernardini, Steven M. Cutchin, Kwunnan Lin, Elisha Sacks Mar 1997

Comprehensive Analysis Of Joints From Patient Clinical Data, Chandrajit L. Bajaj, Fausto Bernardini, Steven M. Cutchin, Kwunnan Lin, Elisha Sacks

Department of Computer Science Technical Reports

No abstract provided.

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Matching For Run-Length Encoded Strings, Alberto Apostolico, Gad M. Landau, Steven Skiena Mar 1997

Matching For Run-Length Encoded Strings, Alberto Apostolico, Gad M. Landau, Steven Skiena

Department of Computer Science Technical Reports

No abstract provided.

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Quicksort Algorithm Again Revisted, Charles Knessl, Wojciech Szpankowski Mar 1997

Quicksort Algorithm Again Revisted, Charles Knessl, Wojciech Szpankowski

Department of Computer Science Technical Reports

No abstract provided.

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Algorithms For Variable Length Subnet Address Assignment, Mikhail J. Atallah, Douglas E. Comer Mar 1997

Algorithms For Variable Length Subnet Address Assignment, Mikhail J. Atallah, Douglas E. Comer

Department of Computer Science Technical Reports

No abstract provided.

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Scientific Computing Via The World Wide Web: The Net//Ellpack Pse Server, Shahani Markus, Sanjiva Weerawarana, Elias N. Houstis, John R. Rice Mar 1997

Scientific Computing Via The World Wide Web: The Net//Ellpack Pse Server, Shahani Markus, Sanjiva Weerawarana, Elias N. Houstis, John R. Rice

Department of Computer Science Technical Reports

No abstract provided.

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Multiagent Systems To Support Networked Scientific Computing, Anupam Joshi, N. Ramakrishnan, Elias N. Houstis Mar 1997

Multiagent Systems To Support Networked Scientific Computing, Anupam Joshi, N. Ramakrishnan, Elias N. Houstis

Department of Computer Science Technical Reports

No abstract provided.

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The Peculiar Motions Of Early‐Type Galaxies In Two Distant Regions. Iv. The Photometric Fitting Procedure, R. P. Saglia, Edmund Bertschinger, G. Baggley, David Burstein, Matthew Colless, Roger L. Davies, Robert K. Mcmahan Jr., Gary Wegner Mar 1997

The Peculiar Motions Of Early‐Type Galaxies In Two Distant Regions. Iv. The Photometric Fitting Procedure, R. P. Saglia, Edmund Bertschinger, G. Baggley, David Burstein, Matthew Colless, Roger L. Davies, Robert K. Mcmahan Jr., Gary Wegner

Dartmouth Scholarship

The EFAR project is a study of 736 candidate early-type galaxies in 84 clusters lying in two regions toward Hercules-Corona Borealis and Perseus-Cetus at distances cz ≈ 6000-15,000 km s-1. In this paper we describe a new method of galaxy photometry adopted to derive the photometric parameters of the EFAR galaxies. The algorithm fits the circularized surface brightness profiles as the sum of two seeing-convolved components, an R1/4 and an exponential law. This approach allows us to fit the large variety of luminosity profiles displayed by the EFAR galaxies homogeneously and to derive (for at least a …

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Cascade Artmap: Integrating Neural Computation And Symbolic Knowledge Processing, Ah-Hwee Tan Mar 1997

Cascade Artmap: Integrating Neural Computation And Symbolic Knowledge Processing, Ah-Hwee Tan

Research Collection School Of Computing and Information Systems

This paper introduces a hybrid system termed cascade adaptive resonance theory mapping (ARTMAP) that incorporates symbolic knowledge into neural-network learning and recognition. Cascade ARTMAP, a generalization of fuzzy ARTMAP, represents intermediate attributes and rule cascades of rule-based knowledge explicitly and performs multistep inferencing. A rule insertion algorithm translates if-then symbolic rules into cascade ARTMAP architecture. Besides that initializing networks with prior knowledge can improve predictive accuracy and learning efficiency, the inserted symbolic knowledge can be refined and enhanced by the cascade ARTMAP learning algorithm. By preserving symbolic rule form during learning, the rules extracted from cascade ARTMAP can be compared …

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An Introduction To Algorithmic Information Theory: Its History And Some Examples, George Markowsky Mar 1997

An Introduction To Algorithmic Information Theory: Its History And Some Examples, George Markowsky

Computer Science Faculty Research & Creative Works

The goal of this paper is to provide a simple introduction to Algorithmic Information Theory (AIT) that will highlight some of the main ideas without presenting too many details. More technical treatments of these ideas can be found in References [1], [2], [3] and [4], which are listed at the end of the paper. The main ideas of Algorithmic Information Theory will be presented using English as the underlying programming language. The presentation illustrates the fact that the same arguments can be expressed in any other reasonable language and that the main results have a robust universality across all reasonable …

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Composting Landscape Waste From The University Of Nevada, Las Vegas, K. Jill Hammond Mar 1997

Composting Landscape Waste From The University Of Nevada, Las Vegas, K. Jill Hammond

UNLV Theses, Dissertations, Professional Papers, and Capstones

The University of Nevada, Las Vegas is a major producer of organic waste in the Las Vegas Valley. Composting landscape wastes is one way to reduce both landfill dumping and fertilizer costs for the university. It is also an environmentally friendly means of curbing a nationwide problem: unnecessary use of landfill space. Three sites within Clark County were analyzed for the feasibility of composting: Frenchman Mountain, UNLV Campus, and Boulder City Landfill. Using cost analysis, water availability, and other factors to analyze each site, Boulder City Landfill appears to be the best place to house UNLV's composting operation. Composting in …

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Object Matching Using The Dynamic Programming Algorithm, Rhoda Baggs Koss Mar 1997

Object Matching Using The Dynamic Programming Algorithm, Rhoda Baggs Koss

Theses and Dissertations

A new algorithm for matching objects between images is developed and investigated. Affine transformations, i.e. those with translation, rotation, scaling and shearing between images are considered. Steps along the way include segmentation of the 2 images (referred to as the reference and inspected images), contour tracing of each segment/object in each image, the creation of objects via a new object representation scheme known as length codes (developed in [3]), and the application of the new dynamic warping algorithm. New original concepts include the use of the dynamic warping algorithm on sequences of length codes in order to determine the k …

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Post-Surgical Passive Response Of Local Environment To Primary Tumor Removal, J. A. Adam, C. Bellomo Mar 1997

Post-Surgical Passive Response Of Local Environment To Primary Tumor Removal, J. A. Adam, C. Bellomo

Mathematics & Statistics Faculty Publications

Prompted by recent clinical observations on the phenomenon of metastasis inhibition by an angiogenesis inhibitor, a mathematical model is developed to describe the post-surgical response of the local environment to the “surgical” removal of a spherical tumor in an infinite homogeneous domain. The primary tumor is postulated to be a source of growth inhibitor prior to its removal at t = 0; the resulting relaxation wave arriving from the disturbed (previously steady) state is studied, closed form analytic solutions are derived, and the asymptotic speed of the pulse is estimated to be about 2 × 10−4 cm/sec for the …

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Computer Access For Students With Disabilities: An Adaptive Technology Laboratory, Frances Grodzinsky Mar 1997

Computer Access For Students With Disabilities: An Adaptive Technology Laboratory, Frances Grodzinsky

School of Computer Science & Engineering Faculty Publications

Adaptive technology, which permits equity of access, has helped to reassure people with disabilities that they can attempt a university education with minimal accommodation.

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Teaching Ethical And Social Issues In Cs1 And Cs2, Kay G. Schulze, Frances Grodzinsky Mar 1997

Teaching Ethical And Social Issues In Cs1 And Cs2, Kay G. Schulze, Frances Grodzinsky

School of Computer Science & Engineering Faculty Publications

The discussion of whether ethical and social issues of computing should be explored in undergraduate computer science education has resulted in most academic institutions and educators agreeing that they are important topics that must be included. Further support has been provided by Curricula '91 [16], the CSAC/CSAB accreditation [2] and ImpactCS [12]. Many books [7, 8, 9, 10] and papers [6, 14] have discussed what topics should be covered and what techniques can be used either in a dedicated course or in modules across the curriculum. However, explicit detailed examples that have worked successfully, particularly in lower level computer science …

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Marking A Road To Nowhere-Supreme Court Sets Punitive Damages Guideposts In Bmw V. Gore, Paul M. Sykes Mar 1997

Marking A Road To Nowhere-Supreme Court Sets Punitive Damages Guideposts In Bmw V. Gore, Paul M. Sykes

North Carolina Law Review

No abstract provided.

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Reliability Of Reinforced Concrete Girders Under Corrosion Attack, Dan M. Frangopol, Kai-Yung Lin, Allen C. Estes Mar 1997

Reliability Of Reinforced Concrete Girders Under Corrosion Attack, Dan M. Frangopol, Kai-Yung Lin, Allen C. Estes

Architectural Engineering

Corrosion of reinforcement is a major problem affecting a large number of reinforced concrete structures. At present, most reliability-based design studies of reinforced concrete structures do not consider the effects of corrosion. In this paper, we present a reliability-based approach to the design of reinforced concrete bridge girders that are under corrosion attack. Both reserve and residual reliability constraints are satisfied. The approach is based on the American Association of State Highway and Transportation Officials (AASHTO) standard specifications for highway bridges and on data of chloride corrosion of steel in concrete. First, the effects of corrosion on both moment and …

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Performance Of Mhpm In Rician And Rayleigh Fading Mobile Channels, Fuqin Xiong, S Bgatnyket Mar 1997

Performance Of Mhpm In Rician And Rayleigh Fading Mobile Channels, Fuqin Xiong, S Bgatnyket

Electrical and Computer Engineering Faculty Publications

This paper evaluates the error probability of the rectangular frequency pulse multi-h modulation (MHPM) scheme in slowly-fading, frequency-nonselective or frequency-selective Rician and Rayleigh channels. The evaluation is performed with a method combining analysis and computer simulation. Performance degradations are evaluated for various direct-to-reflected signal ratio, Doppler shifts, and relative time delays in Rician fading channels. Compared with minimum shift keying (MSK), MHPM schemes appear to have retained their coding gains

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A Farewell To Principles, Gary S. Lawson Mar 1997

A Farewell To Principles, Gary S. Lawson

Faculty Scholarship

Larry Alexander and Ken Kress have written one of the most interesting and engaging articles on jurisprudence in recent times- That is not surprising, as they are two of the most consistently interesting and engaging figures on the contemporary legal scene. Their case against the use of Dworkinian legal principles in adjudication is simply devastating. In particular, their argument that Dworkinian legal principles must be identical to correct moral principles in all future cases-their so-called "Argument from Fit" 2 -seems to me unanswerable.

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Asian-American Women: An Understudied Minority, Lina Y. S. Fong Mar 1997

Asian-American Women: An Understudied Minority, Lina Y. S. Fong

The Journal of Sociology & Social Welfare

This paper describes Asian-American women with their inter-ethnic, intergenerational connections. Diversities in race, ethnicity, and socio-economic status influence their lives in family, participation in education, the labor force, and community life. Issues and implications about the myth of Asian- American as model minority, the influence of feminism, and social work service for Asian-American women are also discussed.

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Stages Of Implementation Of Block Scheduling: Perceptions Of School Climate In High Schools In The First Tennessee Regional District, Chele L. Dugger Mar 1997

Stages Of Implementation Of Block Scheduling: Perceptions Of School Climate In High Schools In The First Tennessee Regional District, Chele L. Dugger

Electronic Theses and Dissertations

A descriptive study was conducted to identify teachers' and principals' perceptions of school climate in four stages of a change to block scheduling: Initiation, the first year of Implementation, the second year of Implementation, and the third year of Implementation or Institutionalization. Data were collected from 442 teachers and principals in nine high schools in the First Tennessee Regional District in a stratified purposeful random sample using the Organizational Health Index (OHI), a 44-item survey, and a demographic information sheet. The survey has seven dimensions: Institutional Integrity, Initiating Structure, Consideration, Principal Influence, Resource Support, Morale, and Academic Support. These dimensions …

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A Comparison Of Circular Error Probable Estimators For Small Samples, Charles E. Williams Mar 1997

A Comparison Of Circular Error Probable Estimators For Small Samples, Charles E. Williams

Theses and Dissertations

Several previous studies investigated the performance of competing circular error probable (CEP) estimators for small samples. This estimation is important in ICBM analysis because, due to expense, there are a limited number of ICBM test launches. In the most recent previous study (1993), Tongue considered five CEP estimators in a simulation test, attempting to determine the behavior of these estimators for populations of various bias, ellipticity, correlation, and sample size. In this paper, we build on Tongue's findings in three ways: (1) The number of estimators compared is expanded to eight. (2) Different factors and factor levels are used. (3) …

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Automatic Digital Processing For Calibration Data Of Open Skies Treaty Sensors, Donna D. Keating Mar 1997

Automatic Digital Processing For Calibration Data Of Open Skies Treaty Sensors, Donna D. Keating

Theses and Dissertations

The Open Skies Treaty provides guidelines allowing participants to fly in air space over other participants' countries to monitor strategic military placement and development. The treaty restricts the ground size of the smallest detail recorded by these aerial imaging systems to any size larger than 30 cm. This restriction is enforced by placing a lower limit on the altitude at which a participating aircraft can fly and it is computed as the value of Hmin. Current techniques rely on human photographic interpreters to select the value of Hmin for every calibration pass and is very resource intensive. The Open Skies …

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