Physical Sciences and Mathematics Commons^™

Delay And Power Reduction In Deep Submicron Buses, Sharareh Babvey

Computer Science Theses

As technology scales down, coupling between nodes of the circuits increases and becomes an important factor in interconnection analysis. In many cases like the deep submicron technology (DSM), the coupling between lines (inter-wire capacitance) is strong and the energy consumption caused by parasitic capacitance is non-negligible. In this work, we employ the differential low-weight encoding [1] to reduce energy and delay (transmission cost) on DSM buses. We propose an enumeration method that reduces the encoder table-size from O(2n) words to O(n) words, for an n-bit DSM bus, and so reduces the memory complexity significantly and facilitates energy and delay reduction …

Provenance And Depositional History Of Late Pleistocene New Jersey Shelf Sediments, Roxie Jessica Turner

Geosciences Theses

Pleistocene New Jersey shelf sedimentology is strongly influenced by glacially driven sea level changes. A combination of regressive shoreline processes, subaerial exposure, fluvial downcutting, and deposition and reworking during transgression has influenced the NJ shelf sediment composition. Sediment provenance and transport history may be determined on a shelf environment through analysis of grain size distribution, heavy mineral content, magnetic mineral concentrations, and isotopic dating methods. A combination of surface grab and stratigraphic samples were analyzed within the study area. Relatively high percentages of heavy minerals were found in the 2 phi and 3 phi size fractions and hornblende grains provided …

Continuous Late Pleistocene Paleoclimate Record From The Southwest African Margin: A Multi-Proxy Approach, Julia Keegan Shackford

Geosciences Theses

Late Pleistocene sediments recovered from ODP Leg 175, Site 1085 are used to generate a high-resolution (500 yr) record of continental climate change in Southern Africa. The location of Site 1085, the SW African continental slope, provides a continuous hemipelagic section with a significant terrigenous component. Terrigenous sediments are transported via fluvial and/or eolian transport mechanisms with MIS 1 being dominated by eolian transport. Analyses, including grain-size, color reflectance, biogenic sediment geochemistry (%CaCO3, %TOC, and C/N), bulk sediment geochemistry, and clay mineralogy, are used to identify continental climate conditions in southern Africa. Analyses indicate glacial/interglacial variation. Median grain-size peaks are …

Andrill Southern Mcmurdo Sound Project Scientific Prospectus, David M. Harwood, Fabio Florindo, Richard H. Levy, Christopher R. Fielding, Stephen F. Pekar, M. A. Speece, Sms Science Team, Andrill Science Management Office

ANDRILL Project Information

During the austral summer of 2007 the ANtarctic DRILLing program (ANDRILL) will drill from a sea-ice platform in southern McMurdo Sound to obtain new information about the Neogene Antarctic cryosphere and evolution of Antarctic rift basins.

Multiple Imputation For Correcting Verification Bias, Ofer Harel, Xiao-Hua Zhou

UW Biostatistics Working Paper Series

In the case in which all subjects are screened using a common test, and only a subset of these subjects are tested using a golden standard test, it is well documented that there is a risk for bias, called verification bias. When the test has only two levels (e.g. positive and negative) and we are trying to estimate the sensitivity and specificity of the test, one is actually constructing a confidence interval for a binomial proportion. Since it is well documented that this estimation is not trivial even with complete data, we adopt Multiple imputation (MI) framework for verification bias …

Cooperative Effects In Two-Dimensional Ring-Like Networks Of Three-Center Hydrogen Bonding Interactions, Ruben D. Parra, Satya S. Bulusu, Xiao Cheng Zeng

Xiao Cheng Zeng Publications

Cooperative effects in two-dimensional cyclic networks containing intermolecular three-centered hydrogen bonding interactions of the type H₁&#;A&#;H₂ are investigated by means of ab intio molecular orbital and density functional theory calculations. Ring-like clusters consisting of three and up to nine monomers of the cis–cis isomer of carbonic acid H₂CO₃ are used as basic models, where each unit acts simultaneously as a double hydrogen-bond donor and double hydrogen-bond acceptor. Cooperative effects based on binding energies are evident for (H₂CO₃)_n, where n goes from 2 to 9. Thus, the ZPVE-corrected dissociation …

Mapping And Kinematic Structural Analysis Of The Deep Creek Fault Zone, South Flank Of The Uinta Mountains, Near Vernal, Utah, David A. Haddox

Theses and Dissertations

The geology along the southern flank of the Uinta Mountains, located north of Vernal, Utah, has been mapped at the 7.5' scale within two quadrangles: the Dry Fork and Steinaker Reservoir Quadrangles. Ambiguities dealing with stratigraphy, structural geology, and geohazards are currently being addressed as a result of this and other mapping projects in the vicinity. The geologic units in the area range in age from Mississippian to Late Cretaceous and include Uinta-sourced Tertiary units. Brief unit descriptions are provided for each of the units exposed in the map area. The main structural influence on the rocks within the area …

Molecular Hydrogen In Star-Forming Regions: Implementation Of Its Microphysics In Cloudy, G. Shaw, Gary J. Ferland, N. P. Abel, P. C. Stancil, P. A. M. Van Hoof

Physics and Astronomy Faculty Publications

Much of the baryonic matter in the universe is in the form of H₂, which includes most of the gas in Galactic and extragalactic interstellar clouds. Molecular hydrogen plays a significant role in establishing the thermal balance in many astrophysical environments and can be important as a spectral diagnostic of the gas. Modeling and interpretation of observations of such environments requires a quantitatively complete and accurate treatment of H₂. Using this microphysical model of H₂, we present illustrative calculations of prototypical astrophysical environments. This work forms the foundation for future investigations of these and …

Search For The Lepton-Number-Violating Decay Ξ-→Pμ-Μ-, D. Rajaram, Timothy Holmstrom, Hypercp Collaboration

Chemistry & Physics Faculty Publications

A sensitive search for the lepton-number-violating decay Ξ^-→pμ^-μ^- has been performed using a sample of ∼10⁹  Ξ^- hyperons produced in 800  GeV/c p-Cu collisions. We obtain B(Ξ^-→pμ^-μ^-)<4.0×10^-8 at 90% confidence, improving on the best previous limit by 4 orders of magnitude.

A Survey Of Unidentified Egret Sources At Very High Energies, P. T. Reynolds, Et. Al.

Physical Sciences Publications

The Whipple Observatory 10 m γ-ray telescope has been used to survey the error boxes of EGRET unidentified sources in an attempt to find counterparts at energies of 350 GeV and above. Twenty-one unidentified sources detected by EGRET (more than 10% of the total number) have been included in this survey. In no case is a statistically significant signal found in the EGRET error box, which implies that, at least for this sample, the γ-ray spectra of these sources steepen between 100 MeV and 350 GeV. For each EGRET source location, we list candidate associations and derive upper limits on …

The Ccompton-Getting Effect Of Energetic Particles With An Anisotropic Pitch-Angle Distribution: An Application To Voyager 1 Results At ∼85 Au, Ming Zhang

Aerospace, Physics, and Space Science Faculty Publications

This paper provides a theoretical simulation of anisotropy measurements by the Low-Energy Charged Particle (LECP) experiment on Voyager. The model starts with an anisotropic pitch-angle distribution function in the solar wind plasma reference frame. It includes the effects of both Compton-Getting anisotropy and a perpendicular diffusion anisotropy that possibly exists in the upstream region of the termination shock. The calculation is directly applied to the measurements during the late 2002 particle event seen by Voyager 1. It is shown that the data cannot rule out either the model with zero solar wind speed or the one with a finite speed …

Red Bat (Lasiurus Borealis) Habitat Use In Actively Managed Forested Landscapes Of The Virginia Piedmont, Kathryn A. Durkee

Theses & Honors Papers

Bat habitat in the southeastern U.S. is being threatened by rapid deforestation and degradation, yet conservation and management strategies are limited by the paucity of accurate bat demographic and habitat-use data. I conducted summer mist-net surveys to determine species richness, relative abundance, reproductive condition, and sex ratios of the bat species occurring in the Appomattox-Buckingham State Forest in the Piedmont physiographic region of central Virginia. I captured 8 species: red bat (Lasiurus borealis), eastern pipistrelle (Pipistrellus subflavus) , little brown myotis (Myotis lucifugus) , northern myotis (M septentrionalis ), big brown bat (Eptesicusfascus), evening bat (Nycticeius humeralis), hoary bat (L. …

Stereoselective Allylation Of Chiral Monoperoxyacetals, Aqeel Ahmed, Patrick Dussault

Patrick Dussault Publications

Neighboring iodo-, alkoxy-, acetoxy- and silyl groups impart useful levels of diastereoselection in the Lewis acid-mediated allylation of monoperoxyacetals. Although monoperoxyacetals are found to be considerably less reactive than corresponding nonperoxidic acetals, similar stereochemical trends are observed in the two series.

Computing Isodose Curves For Radiotherapy Treatment Plans, Ryan Acosta

Computer Science Honors Theses

Radiation therapy increasingly means Intensity Modulated Radiation Therapy (IMRT) and withit a trend towards inverse treatment planning. The metrics of a treatment consist of important conformality indices such as the Ian Paddick Conformality Index (IPCI), Dose Volume Histograms (DVH), as well as the conformance isodose lines. This final metric, which offers spatial information of radiation dose that the others do not, shows the results of simulating the treatment plan on the CAT scan images. A physician is able to examine this image and ascertain which portions of the anatomy are the recipients of different levels of radiation dose. Computing isodose …

Survival Model And Estimation For Lung Cancer Patients., Xingchen Yuan

Electronic Theses and Dissertations

Lung cancer is the most frequent fatal cancer in the United States. Following the notion in actuarial math analysis, we assume an exponential form for the baseline hazard function and combine Cox proportional hazard regression for the survival study of a group of lung cancer patients. The covariates in the hazard function are estimated by maximum likelihood estimation following the proportional hazards regression analysis. Although the proportional hazards model does not give an explicit baseline hazard function, the baseline hazard function can be estimated by fitting the data with a non-linear least square technique. The survival model is then examined …

Graph Theory For The Secondary School Classroom., Dayna Brown Smithers

Electronic Theses and Dissertations

After recognizing the beauty and the utility of Graph Theory in solving a variety of problems, the author decided that it would be a good idea to make the subject available for students earlier in their educational experience. In this thesis, the author developed four units in Graph Theory, namely Vertex Coloring, Minimum Spanning Tree, Domination, and Hamiltonian Paths and Cycles, which are appropriate for high school level.

Extending The Abstract Data Model., Matthew Bryston Winegar

Electronic Theses and Dissertations

The Abstract Data Model (ADM) was developed by Sanderson [19] to model and predict semantic loss in data translation between computer languages. In this work, the ADM was applied to eight languages that were not considered as part of the original work. Some of the languages were found to support semantic features, such as the restriction semantics for inheritance found in languages like XML Schemas and Java, which could not be represented in the ADM. A proposal was made to extend the ADM to support these semantic features, and the requirements and implications of implementing that proposal were considered.

Using Domination To Analyze Rna Structures., Travis Reves Coake

Electronic Theses and Dissertations

Understanding RNA molecules is important to genomics research. Recently researchers at the Courant Institute of Mathematical Sciences used graph theory to model RNA molecules and provided a database of trees representing possible secondary RNA structures. In this thesis we use domination parameters to predict which trees are more likely to exist in nature as RNA structures. This approach appears to have promise in graph theory applications in genomics research.

The Challenges Of Network Security Remediation At A Regional University., William R. Simons

Electronic Theses and Dissertations

This thesis describes challenges encountered during a year-long effort to improve the security of the 3,300 node administrative computer network at East Tennessee State University. The key remediation strategies used included employing the vulnerability scanner Nessus to profile the network, analyzing the scan results, and attempting to remove the most critical vulnerabilities found. The project succeeded in decreasing known “high” criticality vulnerabilities on campus by 26.1%, and confirmed four standard observations about the challenges of network administration:

• Vulnerability scanning is a lengthy task best performed in parallel and supported by automated data analysis.
• Securing a network is like trying to …

Matlab Code For Bayesian Fitting Of Adaptive P-Splines In Regression, Veera Baladandayuthapani

Veera Baladandayuthapani

No abstract provided.

The Ten Mile River Study

Watershed Access Lab Projects

In the past year, North Attleboro High Schools’ environmental science class has been conducting an intense study of the Ten Mile River. The focus of our study is to find out detailed information regarding the biological, physical, and chemical state of the river.

The Ten Mile River is the main river within North Attleboro. It runs down to Narragansett Bay and flows through many other local towns. The river begins at Cargill Pond in Plainville and flows 23 miles through North Attleboro, Attleboro, Plainville, and Seekonk before going into Rhode Island.

We studied two sites along the river within Bristol …

Long Pond Replication Study

Watershed Access Lab Projects

Long Pond, due to changes in demographics over the past 20 years, is experiencing environmental stress from two sources. One is the documented presence of Eurasian Milfoil and the other is the increased population density with small lot size in areas immediately adjacent to the pond. It is believed that effluent from overtaxed septic systems is moving into the pond via subsurface flow. ARHS students completed a study of water quality in 2001. At that time they found fecal coliform counts of 215 colonies/100 ml at Clark Shores. The Lakeville Conservation Commission wanted to know whether conditions have improved. This …

Second Herring Brook: An Analysis Of Our Watershed

Watershed Access Lab Projects

No abstract provided.

Introduction To Long Pond

Watershed Access Lab Projects

No abstract provided.

The Loon Pond Experience

Watershed Access Lab Projects

Since a previous study dealt with the water quality of Loon Pond, this year’s study focused on the possible presence of invasive aquatic weeds. Lakeville, like other towns in Massachusetts, is having a difficult battle with Eurasian Milfoil. The Lakeville Conservation Commission wanted to know whether the weed had also invaded Loon Pond. The study found many indigenous species of aquatic weeds. There was no evidence of Eurasian Milfoil. Water quality was within acceptable limits for pH, DO, temperature, reactive phosphorus and nitrogen as nitrate. Any increases in monthly concentrations of RP and NO₃ were explained by weather and …

Seasonal Changes In An Intermittent Stream

Watershed Access Lab Projects

No abstract provided.

Eel River Examination Ii

Watershed Access Lab Projects

No abstract provided.

Long Pond Five Site Study

Watershed Access Lab Projects

Long Pond, due to changes in demographics over the past 20 years, is experiencing environmental stress from two sources. One is the documented presence of Eurasian Milfoil and the other is the increased population density with small lot size in areas immediately adjacent to the pond. Lakeville Conservation Commission has tested and found fecal coliform bacteria in private wells of residents on Long Pond. In 2001, ARHS students found fecal coliforms the water of the pond itself. The Commission wanted to know whether the presence of fecal coliforms and concentrations of reactive phosphorus are weather dependent. Sampling for fecal coliforms …

How Polluted Is West Meadow Brook?

Watershed Access Lab Projects

This was a study of two sites along West Meadow Brook, located on the campus of Brockton High School. The river has been monitored by groups at BHS over the past four years and is known to be polluted. The purpose of the study completed this year was to continue monitoring the quality of the river and how it is being affected by its surroundings. The river is flanked by playing fields, including Marciano Stadium and Campanelli Stadium, on one side, and Brockton High’s main campus and parking lots on the other side. The maintenance of these playing fields, as …

Mussel Mania

Watershed Access Lab Projects

Long Pond, because of changes in demographics over the past 20 years, is experiencing environmental stress from the presence of Eurasian Milfoil. Two herbicides, Sonar and Diquat, were applied to water in the residential area of Long Pond known as Parkhurst in order to eradicate the milfoil. Shortly after this application a report was made of dead mussels floating on the north side of Assawampset Pond. Long Pond and Assawampset Pond are connected via Snake River. There is some speculation that there is also a connection via a culvert between Parkhurst and Assawampset Pond. The Lakeville Conservation Commission wanted to …