Physical Sciences and Mathematics Commons^™

Update On The Estuarine Hypoxia Component Of The Sura Super-Regional Modeling Testbed, A. J. Bever, M.A.M. Friedrichs

Presentations

No abstract provided.

Software For Assumption Weighting For Meta-Analysis Of Genomic Data, Debashis Ghosh, Yihan Li

Debashis Ghosh

This is the software that accompanies Li and Ghosh, "Assumption weighting for incorporating heterogeneity into meta-analysis of genomic data."

Progress Toward Removal Of The Purification Tag In A Putative Toxin Protein Via Site-Specific Mutagenesis And Proteolytic Cleavage, Joanna L. Fridlund, Bethany G. Taylor, Michael H. Godsey

CUP Undergraduate Research

Putative toxin protein BC_2332, isolated from Bacillus cereus, which is a relative of Bacillus anthracis, shows similarity in the active site to ADP-ribosylating proteins present in cholera and diphtheria. Preliminary attempts to measure the activity of the putative toxin were unsuccessful leading to the hypothesis that the purification tag is hindering the activity. This hypothesis is supported by crystal structure analysis showing the putative active site occupied by the purification tag. Our objective was to remove the purification tag, via two different methods, in order to relieve potential inhibition. Both methods have faced obstacles and the work is continuing.

Gis Data: Northampton County, Virginia Shoreline Inventory Report, Marcia Berman, Harry Berquist, Sharon Killeen, Carl Hershner, Karinna Nunez, Karen Reay, Tamia Rudnicky, Daniel E. Schatt

Data

The data inventory developed for the Shoreline Inventory is based on a three tiered shoreline assessment approach. In most cases this assessment characterizes conditions that can be observed from a small boat navigating along the shoreline. The three tiered shoreline assessment approach divides the shorezone into three regions:

1 ) the immediate riparian zone, evaluated for land use; 2 ) the bank, evaluated for height, stability, cover and natural protection; and 3 ) the shoreline, describing the presence of shoreline structures for shore protection and recreational purposes. Hand-held GPS units are used to log features observed in the field.

Three …

Ordway Weather And Water Data 2011, Macalester College

Ordway Weather Data

Contains daily readings for the year indicated. The values include: PAR umol/s/m2, avg wind dir degree, avg windspeed mph, Avg Max Windspeed mph, Avg airtemp C, Avg RH %, Avg BP mmHg, Avg DailyRain in, Avg Rain Duration sec, Avg RainIntensity in/h, Avg Water Temp F, Avg sp cond mS/cm, avg pH, Avg Turb NTU+, Avg ODOSat %, Avg ODO mg/L, Water station PAR umol/s/m2, Avg Water Level m. File format: CSV.

Detect Program Vulnerabilities Using Trace-Based Security Testing, Dazhi Zhang

Computer Science and Engineering Dissertations

Software vulnerabilities are program flaws that can be exploited by attackers to compromise the security of a software system. Although many approaches have been proposed to detect or prevent software attacks, software security incidents continue to occur every year. Security testing aims at detecting program vulnerabilities through a set of test cases and has shown to be effective to detect program vulnerabilities. The primary challenge is how to efficiently produce test cases that are highly effective in detecting vulnerabilities. This dissertation proposes trace-based security testing approaches towards addressing some fundamental challenges in security testing.The first study is to use trace-based …

A Theoretical Framework For Design Space Exploration Of Manycore Processors, Hun Jung

Computer Science and Engineering Dissertations

As design space and workload space in multicore era are continuously expanding, it is a challenge to identify optimal design points quickly during the early stage of multicore processor design or programming phase. To meet this challenge, a thread-level modeling methodology is developed in this dissertation. The idea is to model multicore processors at the thread-level, overlooking instruction-level and microarchitectural details. Since the thread-level modeling is much coarser than the instruction-level modeling, the analysis at this level turns out to be significantly faster than that at the instruction level. This feature makes the methodology particularly amenable to fast performance evaluation …

Adaptive High Level Context Reasoning In Pervasive Environments, Bridget B. Beamon

Computer Science and Engineering Dissertations

It is hard to believe that the Internet is now in its adolescent stage. This information age is replete with communication capable, intelligent, sensor equipped devices. Social networks, web services, and global information repositories make a wealth of information available instantly. There exist endless possibilities for creating useable knowledge. Much of what is considered useable knowledge is not directly observable from low level sensory devices. Abstract situations, relationships and activities must be inferred using a variety of techniques that fuse information from multivariate data sources. We refer to this useable knowledge as high level context. Social, physiological, environmental, computational, activity, …

Regular Algebras Related To Regular Graded Skew Clifford Algebras Of Low Global Dimension, Manizheh Nafari

Mathematics Dissertations

M. Artin, W. Schelter, J. Tate, and M. Van den Bergh introduced the notion of non-commutative regular algebras, and classified regular algebras of global dimension 3 on degree-one generators by using geometry (i.e., point schemes) in the late 1980s. Recently, T. Cassidy and M. Vancliff generalized the notion of a graded Clifford algebra and called it a graded skew Clifford algebra.In this thesis, we prove that all classes of quadratic regular algebras of global dimension 3 contain graded skew Clifford algebras or Ore extensions of graded skew Clifford algebras of global dimension 2. We also prove that some regular algebras …

A Mathematical Model For Swine Flu 2009 With Vaccination, Irfan Turk

Mathematics Theses

H1N1 influenza is one of the deadliest diseases in human's history. Swine Flu 2009 is the same virus and it was named in 2009. Vaccination is of the most common ways to control a disease. We offer a new vaccination model with recommendations from the US Centers for Disease Control and Prevention (CDC). The entire population is divided into 4 different age groups: one group with no vaccination, one group with 2 doses of vaccination, and two groups with 1 dose of vaccination. We establish that higher levels of vaccination lead to greater savings of life. We also consider the …

Capillary Electrophoresis Separation Of Neutral Organic Compounds, Pharmaceutical Drugs, Enantiomers And Anions, Qing Feng

Chemistry & Biochemistry Theses

The focus of this thesis is on using capillary electrophoresis (CE) with on-column UV detection in achiral and chiral separations. Chapter 1 provides a brief introduction to the principle, mechanism, meaning and application of the CE method. Chapter 2 presents the CE separation of multivalent anions by using di- and tetracationic ion pairing reagents. Two newly developed UV transparent phosphonium-based cationic reagents were evaluated as additivesto the background electrolyte of CE for the separation of multiply charged anions, including several complex anions. These cationic reagents showed moderate suppression of the electroosmotic flow (EOF), interacted with the analytes to improve their …

A Diffusionless Transformation Path Relating Th₃P₄ And Spinel Structure Opportunities To Synthesize Ceramic Materials At High Pressures, Arindom Goswami

Chemistry & Biochemistry Theses

Physical properties of solids at high pressure hold the key to many interesting questions in earth and planetary sciences, as well as in applied sciences. At high pressure, most ambient-pressure materials become unstable and transform into new and denser phases. In recent years, many solids with new structure types have been realized at high pressure through experiments and predicted in numerical simulations. Some of these structures are novel and had not been seen at ambient pressure. Some possess a variety of electronic states, i.e., metallic, superconducting, or super-hard states [YAO08]. These discoveries are of high interests both for their potential …

The Development Of The Catalytic Wittig Reaction, Zachary S. Nixon

Chemistry & Biochemistry Dissertations

The formation of carbon-carbon double bonds with stereocontrol is of great importance to synthetic chemistry. The Wittig olefination involves the treatment of an aldehyde or ketone with a phosphonium ylide; yielding an alkene product with concomitant phosphine oxide byproduct. Mechanistic studies have shown that structural and electronic properties of the phosphine and halide reagent greatly influence the stereochemical outcome (E:Z) of the olefination. However, a significant limitation of the reaction is the difficulty of removing the phosphine oxide. A process catalytic in phosphine would alleviate the aforementioned concern and allow enhanced stereocontrol. Preliminary results led to the development of the …

Chemostratigraphy And The Paleoceanography Of The Bossier-Haynesville Formation, East Texas Basin, Texas And La, Usa, Pukar Mainali

Earth & Environmental Sciences Theses

The fine-grained, dark, organic, calcareous Haynesville shale (Kimmeridgian), and the overlying carbonate-poor Bossier shale (Tithonian) was deposited during the warmer Jurassic period in the tectonically formed East Texas Basin. Thirteen drill cores recovered from six counties (Texas) and four parishes (Louisiana) have been studied for their geochemistry. Each core was analyzed at a 1-foot interval using a handheld x-ray fluorescence instrument, providing rapid, quantitative analysis of the following elemental concentrations: Mg, Al, S, Si, P, K, Ti, Ca, Mn, Fe, Mo, Cr, Ni, Cu, Zn, Th, Rb, U, Sr, Zr, and V. In addition, XRD analyses (10 samples from T.W. …

Capillary Scale Reagent Introduction And Optical Detectors For Capillary Scale Analysis, Santosh K. Mishra

Chemistry & Biochemistry Dissertations

Atmospheric aerosols are of great interest as they have the potential to perturb the earth's radiative energy balance, influence the climate, reduce visibility, and adversely affect human health. The composition of atmospheric particulate matter, especially the concentrations of metals and their ratios, provide insights into sources of the aerosol. Capillary scale ion chromatography systems have several advantages over conventional chromatographic analysis systems like low reagent consumption, small sample requirement, higher efficiencies and better absolute mass detection limits. Hence, to achieve source identification and source apportionment, optical detector based capillary ion chromatography systems are proposed to perform qualitative and quantitative analysis …

Morphology Of The Lower Missouri River: The Processes Involving Development Of Highly Sinuous Gooseneck Loop Cutoffs Exposed In The Surficial Deposits Of The River Floodplain, Daniel Earl Carlin

Earth & Environmental Sciences Theses

Mapping the surficial deposits of the Missouri River from Sioux City, Iowa to Mondamin, Iowa brought to light a prominent set of landforms exposed in the floodplain and which are also easily visible via aerial photography. The landforms are segments of highly sinuous channel fills that exhibit the characteristic of turning up-dip against the natural southern gradient of the river valley. These prominent channel scars, of which there are only five exposed in the study area, take on a recognizable “gooseneck” shape. The allostratigraphy for the reach of the Missouri River floodplain from Sioux City to Mondamin was mapped during …

An Updated Gps Velocity Field For Puerto Rico And Virgin Islands: Constraints On Tectonic Setting And Internal Deformation, Desmond Kelvin Ihemedu

Earth & Environmental Sciences Theses

Puerto Rico and the northern Virgin Islands define the eastern end of the Greater Antilles, while the Puerto Rico trench and the Muertos Trough define the northern and the southern limits of the North American - Caribbean plate boundary zone. Three microplates have been defined: (1) Gonave, to the west; (2) Hispaniola, at the center; and (3) Puerto Rico and the northern Virgin Islands (PRVI) at the eastern end. Global Positioning System (GPS) geodesy was previously conducted in this region from 1994 to 2003. It was concluded that the locus of the highest permissible on-surface deformation in Puerto Rico and …

Correlation Of Sequence Stratigraphic Surfaces Of The Mid-Cretaceous Dakota Group From Subsurface To Outcrop Southern Denver Basin, Colorado., Yaqoub Y Y S M Alsayed Alrefaei

Earth & Environmental Sciences Theses

The D and J sandstone of the Cretaceous Dakota Group are considered as the major oil and gas producing units within in the Denver Basin. The distribution of these units in the Denver Basin is a sub-basin of the Early Cretaceous Western Interior Basin .These units are well understood within the northern Denver Basin and the linkage between the subsurface units and their equivalents in outcrop in the Front Range is well-established. They have gained less attention in southern parts of the basin and the linkage between the subsurface units and their equivalents in southern outcrop is not yet established. …

Climate Reconstruction Using Trace Element And Stable Isotope Signatures Preserved In An Early Late Pleistocene Stalagmite From Buckeye Creek Cave, Appalachian Mountains, Southern West Virginia, Usa, Ashley Rachelle Wright

Earth & Environmental Sciences Theses

An early-Late Pleistocene stalagmite was recovered from Buckeye Creek Cave (37°58.57'N, 80°23.98'W), southeastern West Virginia, USA. The growth axis of stalagmite BCC-025 was sampled for δ18O, δ13C, and Sr/Ca of the calcite. A crude age model was developed using two Th-230 ages, from the top (~490 kyrBP) and bottom (~630 kyrBP) of the stalagmite. A more elaborate age model for stalagmite growth was developed using established marine isotope stage (MIS 13/14, 14/15, 15/16) boundaries. Overall, the MIS boundaries approximate the locations of major hiatuses along the axis of stalagmite growth. The proxy records developed from BCC-025 reveal less covariation and …

On The Electronic And Geometric Structure Properties Of Silicon-Germanium Nanoclusters: A Hybrid Density Functional Theoretic Study, Sarah Elizabeth Duesman

Physics Theses

Hybrid density functional theory has been used to study the electronic and geometric structure properties of silicon-germanium nanoclusters containing up to eight atoms. The hybrid functional used is Becke's three-parameter exchange functional with the exchange-correlation functional of Lee, Yang, and Parr (B3LYP). A large 6-311G(3df,3pd) basis set as implemented in the suite of software Gaussian 03/09 has been used for accurate determinations of all properties of the SimGen (m + n [lesser or equal to] 8) nanoclusters. For each cluster, various different isomers have been studied to arrive at a global minimum energy structure, and for each of these isomers …

Gis Data: Northampton County, Virginia Tidal Marsh Inventory, Marcia Berman, Harry Berquist, Sharon Killeen, Carl Hershner, Karinna Nunez, Karen Reay, Tamia Rudnicky, Daniel E. Schatt

Data

The 2012 Tidal Marsh Inventory update for Northampton County, Virginia was generated using on-screen digitizing techniques in the most recent version of ArcGIS® - ArcMap while viewing conditions observed in the most recent imagery from the Virginia Base Mapping Program (VBMP). Dominant plant community types were primarily determined during field surveys from shallow-draft boats moving along the shoreline. Land-based surveys were performed in some locations. One shapefile is developed that portrays tidal marsh areas represented as polygons. A metadata file accompanies the shapefile to define attribute accuracy, data development, and any use restrictions that pertain to the data.

Accurate And Cost Efficient Object Localization Using Passive Uhf Rfid, Jae Sung Choi

Computer Science and Engineering Dissertations

In a smart environment, accurate locations of objects are a fundamental and critical issue. To achieve this goal, we present several methods based on passive far-field UHF RFID technologies, which can satisfy accuracy, robustness and reliability, cost efficiency, simplicity, compatibility, and scalability. Our research overcomes several negative characteristics of the use of cost efficient passive UHF RFID. Our research has several important contributions.First, we study the causes of the problems of using passive UHF RFID in localization, with detailed empirical results, and then, present the impacts of the causes on existing localization techniques such as KNN. Second, we present a …

Efficient Exploration Techniques On Large Databases, Senjuti Basu Roy

Computer Science and Engineering Dissertations

Search, retrieval, and exploration of information have become some of the most intense and principal research challenges in many enterprize and e-commerce applications off late. The mainstay of this dissertation is to analyze and investigate different aspects of online data exploration, and propose techniques to accomplish them efficiently. In particular, the results in this dissertation widen the scope of existing faceted search and recommendation systems - two upcoming fields in data exploration which are still in their infancy. Faceted search, the de facto standard for e-commerce applications, is an interface framework with the primary design goal of allowing users to …

Chemostratigraphy And Paleoenvironment Of The Smithwick Formation, Fort Worth Basin, San Saba County, Texas, Elisha Nichole Hughes

Earth & Environmental Sciences Theses

The Early Pennsylvanian-Age Smithwick Formation was deposited in the tectonically active Fort Worth Basin in North Central Texas during a time of well-documented global climatic instability during the Late Paleozoic ice age. Geochemical and stable isotopic results from two cores recovered from the southwestern portion of the FWB provide paleoenvironmental insight into the conditions under which the Smithwick was deposited. Specifically, major element geochemistry and mineralogical results suggest a depositional setting grading from a carbonate-rich facies (Marble Falls and Big Saline) into a transgressive siliciclastic-dominated mudrock (Smithwick) that coarsens upward into a progradational mudrock and silt/sand sequence (Atoka and Strawn). …

Identifying Possible Hydrologic Recharge Zones In The Sangre De Cristo Aquifer On The Milliken Ranch In Las Vegas, Nm, Ian Hamilton

Earth & Environmental Sciences Theses

Groundwater at the periphery of mountain ranges in the desert southwest has its provenance in two possible sources: local or regional flow. This study sought to identify the source of deep groundwater from wells on ranches in the Hogback area west of Las Vegas, NM, an area under scrutiny as a possible source for municipal use. Surface and groundwater samples were taken in the area and analyzed for water chemistry and stable isotope ratios of deuterium and oxygen-18. Ratio values were plotted against the Global Meteoric Water Line (GMWL) and also plotted on an interpolated map of precipitation values for …

Chemostratigraphy Of The Eagle Ford Formation, Timothy J. Kearns

Earth & Environmental Sciences Theses

The Late Cretaceous Eagle Ford Formation contains the Cenomanian-Turonian Boundary (CTB). It crops out along the Red River and extends southward through the Dallas-Fort Worth Area of Texas, Waco, Austin and west towards Del Rio and Big Bend. The outcrops were not sampled. Sampling was conducted on cores located at the Bureau of Economic Geology (BEG). The cores were collected from Zavala, La Salle, Frio, Gonzalez, De Witt, and Bee Counties. The Austin Chalk Formation is located above the Eagle Ford Formation and the Buda Formation is located below it. Deposition of the Eagle Ford Formation occurred in the southern …

Reducing Lead Bioavalability In Soil By Adding Apatite Ii, Dhary Saad Alkandary

Earth & Environmental Sciences Theses

This study was an examination of phosphate-induced immobilization of lead (Pb) in soils through addition of apatite II (fish bone material). The sources of Pb minerals in the soils examined in this in situ remediation study included anglesite (PbSO4), litharge (PbO), and cerrusite (PbCO3). Phosphate-induced Pb immobilization occurs when Pb ions are exchanged with calcium ions to form insoluble lead-phosphate (pyromorphite (Pb5(PO4)3Cl). Commercially available A- horizon soil was spiked with ten different Pb paints that contained different forms of Pb (e.g. PbO, PbCO3, PbSO4) and then sieved through a <250 micron mesh. Two and three replicates were prepared for each Pb paint sample type for apatite and no apatite additions, respectively. A series of large syringe tubes were filled separately with each of the spiked test soils to create a series of soil columns. In all, a set to sixty seven soil columns amended nominally with 5% w/w of apatite, and 2% Pb paint were tested. The change in potential bioavailability of lead in each soil column was evaluated after each column was eluted with Milli-Q water for one year. Soil samples were taken from each column at times zero, six, and twelve months. An in vitro bioaccessibility assessment of each soil column sample was accomplished using a simulated gastric fluid (SGF) digestion to determine the amount of Pb that could potentially be released into solution in the acid conditions in the human stomach. The assay involved using a SGF solution of 100 mL of Milli-Q water, 3 grams of glycine, and hydrochloric acid (HCl) in sufficient quantity to adjust the pH to a value 2.5. To this solution was added 0.5 gram or 1 gram of soil collected at each of the selected time points. Each SGF and soil suspension was tumbled for one hour at 37 °C in a modified Toxicity Characteristic Leaching Procedure (TCLP) system. A Scanning Electron Microscopy (SEM) spectrometer with a Back-Scattered Electron (BSE) detector and an Energy Dispersive X-ray Spectrometer (EDS) was used to obtain photomicrographs of soil samples and to determine the chemical nature of constituent Pb-bearing particles at time zero and at twelve months. A hand-held X-ray florescence (XRF) detector was used to determine the total Pb concentrations in soil samples at time zero. The study found that there was a general reduction in the amount of bioaccessible Pb in the soils at twelve months compared to time zero. This was supported by the identification of Pb-phosphate particle phases in the soils samples at twelve months. The effectiveness of using apatite II to remediate Pb-paint contaminated soil, through the immobilization of Pb through the formation of the sparingly soluble Pb-phosphate mineral pyromorphite (Pb5(PO4)3Cl) appears to be justified.

Chemostratigraphy And Paleoceanography Of The Mississippian Barnett Formation, Southern Fort Worth Basin, Texas, Usa, James Daniel Hoelke

Earth & Environmental Sciences Theses

The Mississippian (Visean-Serpukhovian) Barnett Formation is a lithologic unit composed primarily of laminated siliceous mudstone and calcareous siliceous mudstone with significant phosphate and sulfide phases present. The Barnett Formation was deposited in the Fort Worth Basin, a marine foreland basin that formed as a result of the early Ouachita Orogeny from the collision of Laurasia and Gondwana. In this study we used a variety of geochemical methods to provide a detailed assessment of the chemostratigraphy and paleoceanography of the Barnett Formation in the southern end of the Fort Worth Basin in Texas. Various aspects of the Barnett Formation studied include: …

Thermal Maturity And Porosity Development During Catagensis In The Barnett Shale, Fort Worth Basin, Texas, Nathan Glondys

Earth & Environmental Sciences Theses

Unconventional resource plays are typified by significantly recoverable volumes of thermally mature hydrocarbons (oil, condensate and/or gases) trapped within a low permeability shale formation acting as source, reservoir and seal. These systems pose a scientific and engineering challenge to produce recoverable hydrocarbons from, chiefly due to their low permeabilities. There is growing evidence that secondary porosity in organic gas bearing shales is created during the thermal maturation of kerogen. A better understanding of porosity development during maturation of mobile organics during catagenesis may yield new insight on how we view these systems. A comparative analysis of the gas phase(s), peak …

New Macrocyclic Glycopeptide Antibiotic For Chiral Hplc Stationary Phases And Ionic Liquids In Analytical Chemistry, Xiaotong Zhang

Chemistry & Biochemistry Dissertations

The main focus of this dissertation is on the development of new chiral stationary phases for HPLC and GC and the application of ionic liquids in analytical chemistry. They will be discussed separately in two parts. Enantiomeric separations continue to be of great interest to the pharmaceutical industry. It is because drug molecules of opposite chirality often possess distinctive effects in biological environments. Direct chromatography is one of the major techniques used to address the challenge of enantiomeric analysis. Macrocyclic glycopeptides are a very useful class of chiral selectors for HPLC stationary phases because of their broad enantioselectivity. A study …