Physical Sciences and Mathematics Commons^™

Gis Data: City Of Portsmouth, Virginia Tidal Marsh Inventory, Marcia Berman, Karinna Nunez, Sharon Killeen, Tamia Rudnicky, Julie Bradshaw, Kory Angstadt, Karen Duhring, David Weiss, Carl Hershner

Data

The 2015 Tidal Marsh Inventory update for the City of Portsmouth, 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.

Gis Data: Middlesex County, Virginia Tidal Marsh Inventory, Marcia Berman, Karinna Nunez, Sharon Killeen, Tamia Rudnicky, Julie Bradshaw, Kory Angstadt, David Stanhope, Christine Tombleson, Karen Duhring, David Weiss, Carl Hershner

Data

The 2015 Tidal Marsh Inventory update for Middlesex 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.

Gis Data: Lancaster County, Virginia Tidal Marsh Inventory, Marcia Berman, Karinna Nunez, Sharon Killeen, Tamia Rudnicky, Julie G. Bradshaw, Kory Angstadt, David Stanhope, Christine Tombleson, Karen Duhring, Alexander D. Renaud, Robert Isdell, Pamela Braff, David Weiss, Carl Hershner

Data

The 2015 Tidal Marsh Inventory update for Lancaster 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.

Gis Data: Middlesex County, Virginia Shoreline Inventory Report, Marcia Berman, Karinna Nunez, Sharon Killeen, Tamia Rudnicky, Julie Bradshaw, Kory Angstadt, David Stanhope, Christine Tombleson, Karen Duhring, David Weiss, Carl Hershner

Data

The data inventory developed for the Shoreline Inventory is based on a three tiered shoreline assessment approach. This assessment characterizes conditions that can be observed from a small boat navigating along the shoreline or by using observations made remotely at the desktop using high resolution imagery. 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, cover and natural protection

3. the shoreline, describing the presence of shoreline structures for shore protection and recreational purposes.

The 2015 Inventory for Middlesex County was generated using on-screen, digitizing …

Gis Data: City Of Portsmouth, Shoreline Inventory Report, Marcia Berman, Karinna Nunez, Sharon Killeen, Tamia Rudnicky, Julie Bradshaw, Kory Angstadt, Karen Duhring, David Weiss, Carl Hershner

Data

The data inventory developed for the Shoreline Inventory is based on a three tiered shoreline assessment approach. This assessment characterizes conditions that can be observed from a small boat navigating along the shoreline or by using observations made remotely at the desktop using high resolution imagery. 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, cover and natural protection; and 3) the shoreline, describing the presence of shoreline structures for shore protection and recreational purposes.

The 2015 Inventory for the City of …

Gis Data: Charles City County Shoreline Management Model, Kory Angstadt, Marcia Berman, Julie G. Bradshaw, Carl Hershner, Sharon Killeen, Karinna Nunez, Tamia Rudnicky

Data

The Shoreline Management Model is a GIS spatial model that determines appropriate shoreline best management practices using available spatial data and decision tree logic. Available shoreline conditions used in the model include the presence or absence of tidal marshes, beaches, and forested riparian buffers, bank vegetation cover, bank height, wave exposure (fetch), nearshore water depth, and proximity of coastal development to the shoreline. The model output for shoreline best management practices is displayed in the locality Comprehensive Map Viewer. One GIS shapefile is developed that describes two arcs or lines representing practices in the upland area and practices at the …

Mechanical Reliability Of Porous Low-K Dielectrics For Advanced Interconnect: Study Of The Instability Mechanisms In Porous Low-K Dielectrics And Their Mediation Through Inert Plasma Induced Re-Polymerization Of The Backbone Structure, Yoonki Sa

Computer Science and Engineering Dissertations

Continuous scaling down of critical dimensions in interconnect structures requires the use of ultralow dielectric constant (k) films as interlayer dielectrics to reduce resistance-capacitance delays. Porous carbon-doped silicon oxide (p-SiCOH) dielectrics have been the leading approach to produce these ultralow-k materials. However, embedding of porosity into dielectric layer necessarily decreases the mechanical reliability and increases its susceptibility to adsorption of potentially deleterious chemical species during device fabrication process. Among those, exposure of porous-SiCOH low-k (PLK) dielectrics to oxidizing plasma environment causes the increase in dielectric constant and their vulnerability to mechanical instability of PLKs due to the loss of methyl …

A Personalized Profile Based Learning System For Power Management In Android, Ashwin Arikere

Computer Science and Engineering Dissertations

Mobile computing devices are becoming more ubiquitous everyday due to the phenomenal growth in technology powering them. With the amount of computing power available in these devices, users are capable of achieving a multitude of tasks that were only possible with a PC just a few years ago. However, these devices still face issues regarding power management. Battery technology has not kept pace with the development in other areas. With a limited supply of energy, the mobile device of today requires a fine balance of power management to provide adequate energy to support the heavy duty computing of the user …

Enabling Exploratory Mining Over Hidden Databases, Saravanan Thirumuruganathan

Computer Science and Engineering Dissertations

Almost all popular websites (such as Amazon, EBay, microblogs such as Twitter, Instagram, collaborative content sites such as IMDB, Yelp etc) are powered internally by large data repositories. We designate them as hidden databases as their underlying data is accessible only through proprietary form-like interfaces that require users to query the system by entering desired values for a few attributes. Further, these web databases also impose a number of restrictions. For example, the top-k output constraint ensures that when there are a large number of tuples matching the query, only a few of them (top-k) are preferentially selected and returned …

Human Factors In Textual Password-Based Authentication, S M Taiabul Haque

Computer Science and Engineering Dissertations

Despite being the most commonly used method of authentication on the Web, textual password-based authentication is by no means a panacea as long as usability is concerned. In this dissertation work, we address some usability issues of textual password-based authentication and propose solutions to them. In our first work, we examine the problem of multiple password management and identify the mental model of users for managing multiple password-protected accounts. We propose a hierarchy of password importance and use an experiment to examine the degree ofsimilarity between passwords for lower-level (e.g. news portal) and higher-level (e.g. banking) websites in this hierarchy. …

Tools For Program Understanding And Reverse-Engineering Of Mobile Applications, Tuan Anh Nguyen

Computer Science and Engineering Dissertations

Mobile software development is evolving rapidly. Software development includes computer programing, documenting, testing and bug fixing processes. These processes need a detail understanding of the application logic which often requires reverse-engineering their artifacts. My thesis identifies and addresses the following three problems in mobile software development, specifically in program understanding and reverse-engineering for mobile application development. (1) There is no graphical on-phone debugger. (2) The second problem is that mobile software programmers have to manually re-implement the conceptual screen drawings or sketches of graphical artists in code, which is cumbersome and expensive. (3) Companies try to “go mobile” (by developing …

Simultaneous Optimization Of Performance, Energy, And Temperature While Allocating Tasks To Multi-Cores, Hafiz Fahad Sheikh

Computer Science and Engineering Dissertations

Multi-core processors have emerged as a solution to the problem of ever-increasing demands for computing power. However, higher power dissipation levels resulting into thermal problems and increasing cooling costs are major factors limiting their scalability into larger systems. Therefore, dynamic thermal management (DTM) and dynamic power management (DPM) of multi/many-core systems have emerged as important areas of research. The existing resource management approaches are either energy-aware or thermal-aware. In this dissertation, we focus on a new problem of simultaneous performance (P), energy (E), and temperature (T) optimized scheduling (PETOS) for allocating tasks to multi-core systems. To allocate a set of …

Equatorial Pacific Export Production And Carbonate Accumulation Over The Middle Miocene Climate Transition, Samantha Cassie Carter

Earth & Environmental Sciences Theses

The Middle Miocene Climate Transition (MMCT) at ~13.8 million years ago (Ma) signifies the point when Earth made its final transition to the icehouse conditions of the Pleistocene. The MMCT is marked by the expansion of the Antarctic Ice Sheet (AIS) at ~13.8 Ma, and is characterized by an abrupt 1% increase in benthic foraminifer δ¹⁸O, of which 70% is interpreted to indicate expansion of the AIS (Shevenell et al., 2008). Centered on this cooling step is 'The Monterey Event' (Vincent and Berger, 1985), a globally recognized long positive carbon isotope excursion seen in benthic and planktonic foraminifera. Within this …

Sandstone Injectites Record Pre-, Syn-, And Post-Folding Deformation At Sheep Mountain Anticline, Wyoming, Jennifer Beyer

Earth & Environmental Sciences Theses

Sandstone injectites ranging from 30 m to over 1 km in outcrop length intrude the Cretaceous Mowry Formation in the vicinity of Sheep Mountain Anticline (Bighorn Basin, WY). These injectites were sourced by the Peay Member of the overlying Cretaceous Frontier Formation, and represent a significant potential fluid pathway through impermeable shales. Sand injection was aided by pre-existing joints in the Mowry Formation during the early folding of Sheep Mountain Anticline. Upon unfolding around bedding orientations, most of the injectites restore to vertical (dike) and horizontal (sill) orientations. Downward injection of the Peay sand was likely made possible by a …

Computer Models Of A Basement Involved Fault Propagation Fold During The Laramide Orogeny Around Las Vegas, New Mexico, Jerry Timothy Ford

Earth & Environmental Sciences Theses

Numerical geomechanical modeling is acceptable today for studying geologic structures and is readily accomplished by most computers used by geoscientists and engineers interested in studying geomechanics. Models should be simple so that too many discontinuities are not introduced. This study creates models of a thrust fault, developed and implemented using the computer program FLAC version 4.0 to simulate the structural evolution of a basement-involved fault propagation fold undergoing shortening and then compares them to a published cross section NW of Las Vegas, New Mexico. FLAC is a numerical 2D modeling program for modeling geologic materials and has large strain capability …

Nucleation Of Thrust Faults Due To Heterogeneous Bedding Plane Slip: Evidence From An Ohio Coal Mine, Ciel Elizalde

Earth & Environmental Sciences Theses

Oil shales often form the roof and floor rocks of many coal mines in the Appalachian basin. These mines offer outstanding 3D exposures of fresh rocks, otherwise only accessible via boreholes or heavily weathered surface outcrops, and present an excellent opportunity to directly observe pristine in situ natural fractures in shale. In Carroll County, Ohio, small thrust faults that predate mining operations are well exposed within the roof rocks and develop near areas where gradients of coal-shale contacts are steepest, causing roof rock instability. We hypothesize that sloping bedding contact surfaces serve as natural displacement discontinuities which augment the local …

Constraining The Near Tip Stresses Around Propagating Earthquake Ruptures: Frictional Response And Off Fault Tensile Crack Development, Monica Barbery

Earth & Environmental Sciences Theses

The near-tip stress, strain, and displacement fields around propagating ruptures are complicated, transient, and depend heavily on the evolution of the shear traction along the advancing rupture. This shear traction evolution is in turn influenced by dynamic weakening of the coefficient of friction. I have investigated near tip rupture mechanics using two approaches. In the first approach, I conduct experiments using a novel torsional Kolsky bar apparatus to investigate the frictional evolution of synthetic rock gouges at pressures, accelerations, and slip velocities expected to be operating in the seismogenic zone where most earthquakes nucleate. Microstructural analysis and 1-D thermal modeling …

Nanopetrophysics Characterization Of The Bakken Formation, Williston Basin, North Dakota, Usa, Joseph Ikechukwu Anyanwu

Earth & Environmental Sciences Theses

The recent oil boom in the US has been attributed to the result of hydraulic fracturing and horizontal drilling of shale plays. However despite this boom, production and maximum recovery is still limited to be only few percentage of the original oil in place. There have been many studies attempting to enhance the oil recovery of the Bakken Shale, however one area that has not been addressed is the structure of the nanopores storing and transporting the hydrocarbons. The pore geometry and connectivity of these nanopore structures affect the fluid flow and mass transport, which is linked to overall oil …

Multiple Approaches To Characterizing Pore Structure For A Range Of Sandstones Samples, Samson Sunday Arawole

Earth & Environmental Sciences Theses

Using various approaches, this work examines pore structure (geometry and connectivity) of a range of sandstone samples with their permeability varying by five orders of magnitude. The following four experimental approaches were used: Mercury Injection Capillary Pressure (MICP), Nuclear Magnetic Resonance (NMR), Fluid imbibition and Micro Ct Scan imaging. Fluid imbibition was also used to gauge pore connectivity of these sandstones. Furthermore, basic properties of air porosity and permeability were obtained on the samples before and after all four procedures and used as a basis for property comparison. “Specific” API brine permeability was also run on all samples for comparison …

A Geomechanical Approach To Evaluate Brittleness Using Well Logs: Mississippian Limestone, Northern Oklahoma, James Martin

Earth & Environmental Sciences Theses

Fracture density, or brittleness, of a rock is an important factor in understanding the characteristics of a reservoir and the reservoir's predisposition to fracturing. This becomes particularly critical when exploring and producing in tight or fracture dominated reservoirs such as that of the Mississippian limestone in the study area on the Northern Shelf of the Anadarko basin, Oklahoma. Previous work has defined brittleness on the basis of mineralogy or elastic rock parameters. This study explores a new definition of brittleness based on geomechanical principles that incorporates linear elastic rock properties as well as fracture toughness. The equation being used for …

The Variance Of Methane Adsorption And Its Relation To Thermal Maturity In The Marcellus Shale, Alexander Addison Miller

Earth & Environmental Sciences Theses

In unconventional shale gas plays, gas-in-place is a major factor in evaluating the shale’s potential and determining well density and lateral placement. The two main contributors to total gas-in-place are free gas and adsorbed gas. Gas in pores, “free” gas and adsorbed gas, which equal gas-in-place when summed, contribute to production from unconventional mudstone reservoirs like the Middle Devonian Marcellus Shale in the Appalachian Basin. Gas-in-place and production volumes however, vary throughout the different areas of Marcellus production in the basin. This paper analyzes the change in volumes of adsorbed methane through the geologically different regions of Marcellus production. Comparing …

Nano-Petrophysics Study Of The Three Forks Formation In The Williston Basin, North Dakota, U.S.A., Daniel Samuel Baah

Earth & Environmental Sciences Theses

The Late Devonian Three Forks Formation has increasingly become one of the productive plays in the Williston Basin, North Dakota. This growth has been attributed not only to new drilling and completion techniques but also to the availability of new geological information. Although production in the Three Forks Formation has increased, maximum recovery and overall hydrocarbon production is still limited. According to the North Dakota Industrial Commission, the oil recovery factor in the Three Forks Formation is 8.9±5.32%, so only a small percentage of the original oil in place is being produced.One of the most challenging aspects of reservoir quality …

Facial Expression Analysis Via Transfer Learning, Xiao Zhang

Electronic Theses and Dissertations

Automated analysis of facial expressions has remained an interesting and challenging research topic in the field of computer vision and pattern recognition due to vast applications such as human-machine interface design, social robotics, and developmental psychology. This dissertation focuses on developing and applying transfer learning algorithms - multiple kernel learning (MKL) and multi-task learning (MTL) - to resolve the problems of facial feature fusion and the exploitation of multiple facial action units (AUs) relations in designing robust facial expression recognition systems. MKL algorithms are employed to fuse multiple facial features with different kernel functions and tackle the domain adaption problem …

Predicting Irrigation Efficiency In The Rio Grande Project, Gerardo Melendez

Open Access Theses & Dissertations

Surface water losses in the Bureau of Reclamation’s (USBR) Rio Grande Project have become more prevalent within the past few years of the drought of the 2000’s. Simple regressions were performed in order to find correlations and determine factors that may affect the flows within the Rio Grande Project. Correlations were found in the difference between Rio Grande below Caballo flows and Rio Grande at El Paso flows, and between the diversion ratio and groundwater levels. Caballo Reservoir release amounts were found to be fairly well correlated with the difference between the Rio Grande below Caballo and the Rio Grande …

Robust Fast Direct Integral Equation Solver For Quasi-Periodic Scattering Problems With A Large Number Of Layers, Min Hyung Cho, Alex H. Barnett

Dartmouth Scholarship

We present a new boundary integral formulation for time-harmonic wave diffraction from two-dimensional structures with many layers of arbitrary periodic shape, such as multilayer dielectric gratings in TM polarization. Our scheme is robust at all scattering parameters, unlike the conventional quasi-periodic Green’s function method which fails whenever any of the layers approaches a Wood anomaly. We achieve this by a decomposition into near- and far-field contributions. The former uses the free-space Green’s function in a second-kind integral equation on one period of the material interfaces and their immediate left and right neighbors; the latter uses proxy point sources and small …

Redox Active Lipophilic Ruthenium Complexes As Potential Anti-Cancer Drugs, Nagham Alatrash

Chemistry & Biochemistry Dissertations

The dinuclear ruthenium(II) polypyridyl complexes (RPCs) [(phen)2Ru(tatpp)Ru(phen)2][PF6]4 (P4+) and the monomeric [(phen)2Ru(tatpp)]Cl2 (MP2+) are promising candidates for anti-cancer drug development in terms of the observed anti-tumor activity in vivo and in vitro. These complexes contain the redox-active tatpp (9,11,20,22-tetraazatetrapyrido[3,2-a:2'3'-c:3'',2''-1:2''',3''']-pentacene) ligand which seems to be the critical component for biological activity. These complexes cleave DNA when reduced in situ to a radical species. Both complexes exhibit selective cytotoxicity toward cultured malignant cell lines and showed inhibition of tumor growth in vivo. This work expands on this platform by preparing and examining more lipophilic analogues of P4+ and MP2+. Specifically, four lipophilic …

Towards Establishing The Mechanism Of Dna Cleavage By Redox-Active Ruthenium(Ii) Polypyridyl Complexes, Cynthia Ann Griffith

Chemistry & Biochemistry Theses

In earlier reports, it was established that ruthenium (II) polypyridyl complexes RPCs, [Ru(tatpp)]²⁺ (3²⁺) and [Ru(tatpp)Ru]⁴⁺ (4⁴⁺) show potent antitumor properties in vivo in nude mouse lung cancer models.² These RPC's undergo in vitro reduction by glutathione (GSH) to form a species that induces DNA cleavage. It was also demonstrated that the mechanism of DNA cleavage follows an unusual dependence on dioxygen (O₂) concentration: the increase in cleavage activity of these RPC complexes are inversely proportional to O₂ concentration. In fact, cleavage is quenched in the complete absence of O₂. In this work we currently postulate when 3²⁺ and 4⁴⁺ …

Nickel (Ii) Pincer Complexes Supported By 2,6-Bis(3,5-Ditolyl-2-Pyrrolyl)Pyridine, Abhijit Pramanik

Chemistry & Biochemistry Theses

Ni(II) pincer complexes are among the most important and useful compounds in homogeneous catalysis. Significant advancement has been made in this field in recent years. Many Ni(II) pincer complexes have been prepared and utilized in various catalytic reactions e.g. cross coupling reactions, C-H activation, carbon dioxide activation etc. Still, nickel(II) complexes supported by the pincer ligand with three nitrogen donors are relatively less explored and catalytic applications with those complexes are scarce in literature. This thesis describes the synthesis of a new pyrrolyl pyridine based pincer ligand and its Ni(II) complexes. The pyrrolyl pyridine pincer ligand, a relatively new class …

A Potential Long-Lived Upper Cretaceous Paleodrainage System In The U.S. Southwestern Georgia-Southeastern Alabama Region, Daniel L. Black

Theses and Dissertations

No abstract provided.

Studies On Reductive Horner-Wadsworth-Emmons Olefination Using Mixed Silyl Acetals, Udaya Sree Dakarapu

Chemistry & Biochemistry Theses

Homologation of esters to α,β-unsaturated esters is a useful transformation in organic synthesis. We have developed a new approach for the Ir-catalyzed reductive Horner-Wadsworth-Emmons olefination of esters; a one-pot method for the transformation of esters to α,β-unsaturated esters utilizing silyl acetals as aldehyde equivalents followed by Horner-Wadsworth-Emmons olefination. Lewis based activation of silyl acetals formed by Ir-catalyzed hydrosilylation of esters initially generates putative penta-coordinate silicate acetals which fragment into aldehydes, silanes and alkoxides in situ. The alkoxides deprotonate phosphonate esters which subsequently react with the aldehydes to furnish α,β-unsaturated esters. This method is operationally simple compared with aluminium hydride-based reductive …