Digital Commons Network^™

Feedback Control Solutions To Network Level User-Equilibrium Real-Time Dynamic Traffic Assignment Problems, Pushkin Kachroo, Kaan Ozbay

Electrical & Computer Engineering Faculty Research

A new method for performing dynamic traffic assignment (DTA) is presented which is applicable in real time, since the solution is based on feedback control. This method employs the design of nonlinear H∞ feedback control systems which is robust to certain class of uncertainties in the system. The solution aims at achieving user equilibrium on alternate routes in a network setting.

Reconstruction Of Wetland Hydrology Dynamics Using Tree Rings, Allan P. Hascall Iii

Dissertations

Increment core samples were collected and examined to test the hypothesis that the history of punctuated or intermediate-term changes in wetland soil-moisture conditions can be reconstructed from the annual growth-ring record of trees. The hypothesis is based on plant physiological principles that indicate a relationship between water surplus stress and impaired physiological activity that could lead to reduced growth.

Sampling sites were selected for their ostensible historic hydrologic variability and the availability of documentation of hydrologic disturbances. A conceptual model was developed by which trees were sampled along a hydrotopographic gradient for comparison of radial stem growth in uplands versus …

Utb/Tsc This Week 1997-04, University Of Texas At Brownsville And Texas Southmost College. Office Of News And Information

UTB/TSC Archives - This Week Newsletter

No abstract provided.

Microzooplankton Dynamics In Lower Chesapeake Bay And Its Major Tributaries, Gyung Soo Park

Biological Sciences Theses & Dissertations

This study identified the temporal and spatial variability of microzooplankton density and biomass at 14 stations located within Chesapeake Bay and four rivers. Microzooplankton are defined as those heterotrophic organisms which range from 20 to 200 $\mu$m in size, and in this study were mainly composed of copepod nauplii, rotifers, and ciliates. Ciliates were the most abundant microzooplankton, comprising more than 90% of the total density, with copepod nauplii representing approximately 50% of the total microzooplankton biomass (carbon content). Rotifers contributed less than 5% for both density and biomass of the total microzooplankton.

Maximum ciliate abundance occurred from spring to …

Temporal Flocking And Cacophony Simulating Agent Communication In A Noisy Environment, Jessica R. Crawford

Honors Theses

Realistic communication is one of the most difficult aspects of simulating group behavior because the patterns produced by group communication are complex and not easily definable. In this paper, we present a model, developed using artificial life methodology, for creating simulations of group communication. Our model employs autonomous, artificial agents to produce emergent group behavior that resembles the communication patterns of a group, specifically, a flock of birds. Each agent collects information about its environment and its neighbors and follows a set of rules designed to meet both group goals and individual agent goals. Because we seek to establish emergent …

Influence Of Physics On The Distribution Of Ichthyoplankton Across The Chesapeake Bay Plume, Christian S. Reiss

OES Theses and Dissertations

Most marine fish have retained pelagic larval stages that are spawned away from juvenile habitats. Physical and biological processes on a number of scales may affect larval survival. Mesoscale features like estuarine or riverine plumes and fronts are thought to affect larval survival by transporting larvae to juvenile habitats or by retaining larvae in favorable developmental habitats. It is likely that these features are major contributors in the regulation of shelf-spawned estuarine-dependent taxa.

This study examined how physical oceanographic features affected the spatial distribution of ichthyoplankton across the Chesapeake Bay Plume. Larval surveys were conducted across the shelf and within …

Three-Dimensional Aerodynamic Design Optimization Using Discrete Sensitivity Analysis And Parallel Computing, Amidu Olawale Oloso

Mechanical & Aerospace Engineering Theses & Dissertations

A hybrid automatic differentiation/incremental iterative method was implemented in the general purpose advanced computational fluid dynamics code (CFL3D Version 4.1) to yield a new code (CFL3D.ADII) that is capable of computing consistently discrete first order sensitivity derivatives for complex geometries. With the exception of unsteady problems, the new code retains all the useful features and capabilities of the original CFL3D flow analysis code. The superiority of the new code over a carefully applied method of finite-differences is demonstrated.

A coarse grain, scalable, distributed-memory, parallel version of CFL3D.ADII was developed based on "derivative stripmining". In this data-parallel approach, an identical copy …

Acid Mine Drainage And Its Effects On Salamander Assemblages In Cumberland Plateau Streams Of The North Chickamauga Creek Watershed, Tennessee, Melissa Combs

Honors Theses

In Appalachia's coal mining regions, acid mine drainage (AMD) has contributed to the widespread degradation of stream ecosystems. Salamanders are common inhabitants of healthy headwater streams and because of their permeable skins are excellent indicators of ecosystem intergrity. Hence, we investigated the potential effects of AMD on the species richness and relative abundance of aquatic salamanders in selected stream reaches (sites) of the North Chickamauga Creek (NCC) system, Tennessee. Specimens were collected by kick-net sampling with a 500um mesh dip net and/or electroshocking at four AMD-impacted sites (pH< 5.6) and two reference sites pH> 6.2), May-July 1996. Species richness was similarly low at reference sites, 2 …

Least-Squares Approximate Solution Of Overdetermined Sylvester Equations, A. Scottedward Hodel, Pradeep Misra

Electrical Engineering Faculty Publications

We address the problem of computing a low-rank estimate Y of the solution X of the Lyapunov equation AX + XA' + Q = O without computing the matrix X itself. This problem has applications in both the reduced-order modeling and the control of large dimensional systems as well as in a hybrid algorithm for the rapid numerical solution of the Lyapunov equation via the alternating direction implicit method. While no known methods for low-rank approximate solution provide the two-norm optimal rank k estimate Xk of the exact solution X of the Lyapunov equation, our iterative algorithms provide an effective …

How To Make A Mint: The Cryptography Of Anonymous Electronic Cash , Laurie Law, Susan Sabett, Jerry Solinas

American University Law Review

No abstract provided.

Electronic Stored Value Payment Systems, Market Position, And Regulatory Issues , Gary W. Lorenz

American University Law Review

No abstract provided.

Apocalypse Now, Roy Gane

Faculty Publications

No abstract provided.

Heeding The Call Of Cassano V. Cassano: The Need To Amend The Child Support Standards Act, Laurie Dichiara

Pace Law Review

No abstract provided.

April 1, 1997, The Daily Mississippian

Daily Mississippian (all digitized issues)

No abstract provided.

Conservatives, Liberals, Romantics: The Persistent Quest For Certainty In Constitutional Interpretation, Frederick M. Gedicks

Vanderbilt Law Review

From the time that Robert Bork issued his first attack on the Warren Court, originalism has belonged to political conservatives. This interpretive theory, which holds that the understanding of the Constitution at the time it was drafted and ratified controls its contemporary meaning, has been regularly utilized by conservative judges and politicians over the last two decades to question the legitimacy of various (mostly liberal) Supreme Court decisions. Given the liberal tilt of the legal academy, it is not suprising that advocates of originalism constitute a minority of constitutional scholars.

Recently, a prominent constitutional theorist with unmistakably liberal credentials announced …

Faster Image Template Matching In The Sum Of The Absolute Value Of Differences Measure, Mikhail J. Atallah

Department of Computer Science Technical Reports

No abstract provided.

Computer Vulnerability Analysis: Thesis Proposal, Ivan Krsul

Department of Computer Science Technical Reports

No abstract provided.

On The Effect Of Traffic Self-Similarity On Network Performance, Kihong Park, Gitae Kim, Mark Crovella

Department of Computer Science Technical Reports

No abstract provided.

Network Servers For Multidisciplinary Problem Solving, Anupam Joshi, Sanjiva Weerawarana, Elias N. Houstis, John R. Rice, Shahani Markus

Department of Computer Science Technical Reports

No abstract provided.

Ichthyofaunal And Habitat Associations Of Distinct Populations Of Southern Redbelly Dace, Phoxinus Erythrogaster (Teliostei: Cyprinidae) In Mississippi, Martin O'Connell

Earth and Environmental Sciences Faculty Publications

Twenty-two field sites in W-central Mississippi were surveyed for southern red- belly dace Phoxinus erythrogaster to characterize habitat and ichthyofaunal associations of these 'endangered' disjunct populations. Phoxinus erythrogaster occurred at only six sites. Data assessed similarity among all sites and described microhabitat associations of P erythro- gaster. Five species, including Semotilus atromaculatus, Campostoma anomalum, Etheostoma whipplei, P erythrogaster and Pimephales notatus, comprised 95% of the total number of in- dividuals collected at P erythrogaster sites. Standardized abundance (number per seine haul) for S. atromaculatus was consistently high among all P erythrogaster sites, whereas standard- ized abundance for C. anomalum, P …

Development Of Solid Phase Microextraction Methods For Contraband Drugs, Vangielynn Cruz Tersol

Chemistry & Biochemistry Theses & Dissertations

The objective of this study is to develop analytical methods for studying contraband drugs at nanogram levels and to demonstrate the utility of the methods. A method which combines solid phase microextraction with ion mobility spectrometry (SPME-IMS) was developed. The SPME-IMS method was used as a rapid screening tool in studying the chemistry of cocaine HCI, heroin HCI, and heroin freebase on surfaces. The total time for sample preparation, reaction, and analysis is approximately seven minutes. Another method that was developed is one that combines solid phase microextraction with gas chromatography (SPME-GC) for the quantitative analysis of cocaine freebase and …

Biostratigraphic Analysis Of Southern Florida's Plio-Pleistocene Shell Beds, Dalton L. Rasmussen

OES Theses and Dissertations

Four molluscan assemblage zones in southern Florida corresponding to the Pinecrest Sand Member of the Tamiami Formation, and the Caloosahatchee, Bermont and Fort Thompson shell beds were identified following quantitative and qualitative analyses of the fossil molluscan fauna. Twenty-eight bulk sediment samples collected from 16 localities across southern Florida were processed for fossil material, and yielded nearly 60,000 specimens belonging to 311 species. A Q-mode cluster analysis compared sediment samples on the basis of 188 species whose abundances had been converted to binary presence-absence form. The cluster analysis was run four times using the Jaccard and Dice similarity coefficients as …

In Defense Of The Kalam Cosmological Argument, William Lane Craig

Faith and Philosophy: Journal of the Society of Christian Philosophers

No abstract provided.

Bound For The Promised Land: The Gendered Character Of Higher Education, Jane Roland Martin

Duke Journal of Gender Law & Policy

No abstract provided.

Rates, Timing, And Cyclicity Of Holocene Eolian Activity In North-Central United States: Evidence From Varved Lake Sediments, Walter E. Dean

United States Geological Survey: Staff Publications

Most of the sediment components that accumulated in Elk Lake, northwestern Minnesota, during the Holocene are autochthonous or biogenic, delivered to the sediment-water interface on a seasonal schedule, preserved in distinct annual laminae (varves). The main allochthonous component is detrital clastic material, as measured by bulk-sediment concentrations of aluminum, sodium, potassium, titanium, and quartz, that enters the lake mostly as eolian dust. The eolian clastic influx to Elk Lake was considerably greater during the mid-Holocene (8–4 ka) than it has been for the past 4000 yr, when periods of increased eolian activity correspond to the time of the Little Ice …

Responses To Teacher Feedback On Errors Differ By Age And Gender, Sandra P. Clarkson, William (Bill) H. Williams Ph.D

Publications and Research

Many students enter Hunter College's developmental mathematics program committing errors (mis)learned years earlier. These errors typically persist into the adult years and it is important to correct them specifically; simply reteaching concepts is not sufficient. Furthermore, there is a strong correlation between completion rate and student perception of the instructor's concern. To address both factors, we developed and tested an instructional technique to see whether giving detailed feedback to students about their errors would facilitate progress through the course. We found that the use of the feedback method had a clear positive effect on women; while for men, complex age …

High Court Wrongly Elected: A Public Choice Model Of Judging And Its Implications For The Voting Rights Act, Richard L. Hasen

North Carolina Law Review

No abstract provided.

An Adaptive Scheme For Admission Control In Atm Networks, Saragur M. Srinidhi, William H. Thesling, Vijaya K. Konangi

Electrical and Computer Engineering Faculty Publications

This paper presents a real time front-end admission control scheme for ATM networks. A call management scheme which uses the burstiness associated with traffic sources in a heterogeneous ATM environment to effect dynamic assignment of bandwidth is presented. In the proposed scheme, call acceptance is based on an on-line evaluation of the upper bound on cell loss probability which is derived from the estimated distribution of the number of calls arriving. Using this scheme, the negotiated quality of service will be assured when there is no estimation error. The control mechanism is effective when the number of …

The Large, The Small, And The Human Mind Roger Penrose, Abner Shimony, Nancy Cartwright, And Stephen Hawking, Hollis R. Johnson

BYU Studies

Roger Penrose, with Abner Shimony, Nancy Cartwright, and Stephen Hawking. The Large, the Small, and the Human Mind. Cambridge: Cambridge University Press, 1997. 185 pp. $19.95.

Legal Differences Without Economic Distinctions: Points, Penalties, And The Market For Mortgages, Alan L. Feld

Faculty Scholarship

Economic analysis can serve many functions when applied to the law, most notably prediction (how people' react to laws and lawmaking processes), evaluation (whether these reactions result in social efficiency), and description (which features of laws, and lawmaking are salient). Here we propose to describe. We use economic analysis to show a legal difference without an economic distinction. We demonstrate the economic equivalence of two practices in the mortgage market. Interestingly, widespread bans exist on one of these practices, but no restrictions exist on the other.

Specifically, in this essay we examine the relationship among points, prepayment penalties, and financial …