Digital Commons Network^™

A Study Of Pc-5 Ulf Oscillations, M K. Hudson, R E. Denton, M R. Lessard, E G. Miftakhova, R R. Anderson

Dartmouth Scholarship

A study of Pc-5 magnetic pulsations using data from the Combined Release and Radiation Effects Satellite (CRRES) was carried out. Three-component dynamic mag- netic field spectrograms have been used to survey ULF pul- sation activity for the approximate fourteen month lifetime of CRRES. Two-hour panels of dynamic spectra were exam- ined to find events which fall into two basic categories: 1) toroidal modes (fundamental and harmonic resonances) and 2) poloidal modes, which include compressional oscillations. The occurence rates were determined as a function of L value and local time. The main result is a comparable probabil- ity of occurence of …

A Transformation Based Algorithm For Ternary Reversible Logic Synthesis Using Universally Controlled Ternary Gates, Marek Perkowski, Eric Curtis

Electrical and Computer Engineering Faculty Publications and Presentations

In this paper a synthesis algorithm for reversible ternary logic cascades is presented. The algorithm can find a solution for any reversible ternary function with n inputs and n outputs utilizing ternary inverter gates and the new (quantum realizable) UCTG gates which are a powerful generalization of ternary Toffoli gates and Generalized Ternary Gates [4]. The algorithm is an extension of the algorithm presented by Dueck, Maslov, and Miller in [3]. A unique feature of this algorithm is that it utilizes no extra wires to generate the outputs. A basic compaction algorithm is defined to improve the results of the …

Does Attempted Murder Deserve Greater Punishment Than Murder? Moral Luck And The Duty To Prevent Harm, Russell Christopher

Articles, Chapters in Books and Other Contributions to Scholarly Works

No abstract provided.

Mutual Benefits Of Teacher/Scientist Partnerships, Marion Dresner, Erin Starvel

Environmental Science and Management Faculty Publications and Presentations

University ecologists, science educators and natural resource agency scientists have been working with science teachers in a partnership called "Teachers in the Woods". Teachers work with field scientists to implement a variety of ecological research and monitoring projects on federal agency land. Scientists and teachers were interviewed to obtain insights into the benefits of this partnership. These partnerships generated greater teacher knowledge of local ecological communities and processes and fostered a mutual respect for the work of both classroom teachers and scientists.

Relationships Between Needle Nitrogen Concentration And Photosynthetic Responses Of Douglas-Fir Seedlings To Elevated Co2 And Temperature, James D. Lewis, Melissa S. Lucash, David M. Olszyk, David T. Tingey

Environmental Science and Management Faculty Publications and Presentations

• Here we examined correlations between needle nitrogen concentration ([N]) and photosynthetic responses of Douglas-fir (Pseudotsuga menziesii) seedlings to growth in elevated temperatures and atmospheric carbon dioxide concentrations ([CO₂]).
• Seedlings were grown in sunlit, climate-controlled chambers at ambient or ambient+3.5^° C and ambient or ambient +180 μmol mol^-1 CO₂ in a full factorial design. Photosynthetic parameters and needle [N] were measured six times over a 21-month period.
• Needle [N] varied seasonally, and accounted for 30–50% of the variation in photosynthetic parameters. Across measurement periods, elevated temperature increased needle [N] by 26% and light-saturated …

Models Of Statistical Self-Similarity For Signal And Image Synthesis, Seungsin Lee

Theses

Statistical self-similarity of random processes in continuous-domains is defined through invariance of their statistics to time or spatial scaling. In discrete-time, scaling by an arbitrary factor of signals can be accomplished through frequency warping, and statistical self-similarity is defined by the discrete-time continuous-dilation scaling operation. Unlike other self-similarity models mostly relying on characteristics of continuous self-similarity other than scaling, this model provides a way to express discrete-time statistical self-similarity using scaling of discrete-time signals. This dissertation studies the discrete-time self-similarity model based on the new scaling operation, and develops its properties, which reveals relations with other models. Furthermore, it also …

Emotional Recogition Ability Among Incarcerated Youth, Aubrey S. Elmore

Theses

The purpose of this study was to consider emotional recognition ability among incarcerated youth. Specifically, thirty-eight inmates who were eligible for a Free and Appropriate Education (FAPE) under New York State law participated in the study. Participants were administered Ekman's facial discrimination task (1976), the Sociomoral Reflection Measure-Short Form (SRM-SF; Gibbs, Basinger, &Fuller, 1992), and an Emotional Intelligence Survey (Schutte et al., 1998). Results showed the incarcerated youth were less accurate in identifying emotions from facial expressions than were non-incarcerated young adults. Further, incarcerated youth with identified learning disabilities were even less accurate in their ability to recognize emotions than …

Design Literacy For Children, John L. O'Neill

Theses

The goals of this thesis are to propose specific graphic design methods that can be used as a supplement to enhance the 8th grade English Language Arts Learning Standards of the New York State Department of Education. The thesis includes a guidebook for educators.

Design And Simulation Of A Mems Long Distance Traveling Micro-Actuator, Younes Elkacimi

Theses

This thesis is primarily concerned with the design, synthesis, modeling, and simulation of a linear micro-actuator that is able to travel relatively long distances upon the application of a bias voltage. The theoretical investigation addresses the functionality of this device in a certain setting given fixed and variable parameters. The objective of this investigation is to lay out a mathematical model, which explains the physics behind the workings of this device. It is not the objective of this investigation to study all the possible different scenarios that would result by changing certain or all the variable parameters, rather to prove …

Teaching Color Strategies, Carol Fillip

Theses

The purpose of this thesis is to improve graphic design education through the addition of an effective series of instructional exercises for teaching color strategies.

Vibration Of Hollow Cylindrical Shells With Partial Constrained Layer Damping, Nathan E. Smith

Theses

A theoretical analysis is presented for determining the natural frequencies and damping factors for isotropic circular cylindrical shell type structures. Equations of motion for a cylindrical shell and a three-layer cylindrical shell fully and partially treated, with a viscoelastic core, are derived from equilibrium. The assumed mode method or Galerkin method are used to find the equivalent mass and stiffness matrices from which the natural frequencies can then be obtained. The effects on the natural frequency and damping factor due to various viscoelastic core thicknesses, viscoelastic shear moduli, constraining layer thickness, constraining layer Young's moduli, and viscoelastic coverage length are …

Experimental Investigation Of Surface Roughness Microstructures And Their Effects On Pressure Drop Characteristics In Rectangular Minichannels, Derek J. Schmitt

Theses

A literature review has been conducted on pressure drop in mini/microchannels to evaluate major discrepancies in experimental work dealing with pressure drop in these small passages. The aim of the present work is to investigate the effects of surface roughness elements on pressure drop in minichannels in an effort to determine if conventional friction factor equations are valid in predicting the friction factor in minichannels. In the present work, an experimental study is carried out to investigate the effects of surface roughness on air and water flow through rectangular channels with hydraulic diameters ranging from 325µm to 1819µm. Smooth surface …

Multi-Timeline Randomized Story Based Web Animation, Jonathan Fahnestock

Theses

Multi-Timeline Randomized Story Based Web Animation is the investigation of the use of randomness as a creative element and production tool for animations produced for the internet using Macromedia FlashTM. It discusses the process of utilizing Actionscript to create animations more efficiently, production techniques for animating with Flash, writing for randomized animations, directing voice talent, optimization for web output, and advantages and limitations of the application. The application discussed, titled "Random Life," is an animation which incorporates randomness while remaining coherent by adhering to a traditional story line format.

Modeling Of Probe-And-Drogue Part Of An In-Flight Refueling System, Jie Yan

Theses

In this work, a finite element model of an in-flight aircraft refueling system is developed. The model is a first attempt to describe the dynamics of a probe-and-drogue refueling system commonly used by Navy aircraft. The purpose of this work is to develop a model of the drogue system to be able to study control and sensor system requirements for an autonomous refueling system. This work is intended as a first introduction to an automated in-flight refueling system with special concentration on the modeling of a probe-and-drogue in-flight refueling system for aircrafts. An understanding of what is an in-flight refueling …

Enhanced Spectral Modeling Of Sparse Aperture Imaging Systems, Robert E. Introne

Theses

The remote sensing community continues to pursue advanced sensor designs and post processing techniques that improve upon the spatial quality of collected overhead imagery. Unfortunately, spaceborne applications frequently encounter launch vehicle fairing and weight constraints that limit the size of the primary aperture that can be utilized for a given application. Sparse aperture telescopes provide a potential avenue for overcoming some of the size and weight issues associated with deploying a large monolithic mirror system. These telescope systems are constructed of smaller subapertures which are phased to form a common image field and thereby synthesize a larger effective primary diameter …

Image Sequence Restoration By Median Filtering, Shawn R. Jackson

Theses

Median filters are non-linear filters that fit in the generic category of order-statistic filters. Median filters are widely used for reducing random defects, commonly characterized by impulse or "salt and pepper" noise in a single image. Motion estimation is the process of estimating the displacement vector between like pixels in the current frame and the reference frame. When dealing with a motion sequence, the motion vectors are the key for operating on corresponding pixels in several frames. This work explores the use of various motion estimation algorithms in combination with various median filter algorithms to provide noise suppression. The results …

Use Of System Dynamics And Easel For Simulation Of The Software Development Process, Alicia Strupp

Theses

Team software development is a complex and mostly unpredictable process and is characterized by inefficient use of staff and calendar resources. Given the magnitude of software development costs, a deeper understanding of the process may suggest ways to improve resource utilization. Simulation modeling is a useful approach to study the dynamics of complex systems. System dynamics characterizes systems as collections of interacting, non-linear feedback loops. The foundations of system dynamics were developed at MIT in the early 1950s. Since that time, system dynamics has been applied to a large number of complex system domains. In the early 1980s, the system …

Acoustic Signature For Chaos And Fractal Geometries, Obadiah M. Kilonzo

Theses

One discipline of study that has been coming up in the recent years is the study in the behavior of nonlinear systems. Most of these exhibit chaos traits and this has spurred much interest. Fractal geometries, which are as a result of chaos behavior, have been more feasible to research on, with the recent computer technology. Most of these fractal behaviors can be mapped into the sound domain. This 'sound domain' is referred to as acoustic signature. This thesis majors on a way to map out the fractals to the sound domain without much change in the parameters that define …

A Practical Guide To Twentieth-Century Violin Etudes With Performance And Theoretical Analysis, Aaron Michael Farrell

LSU Doctoral Dissertations

This document is a partial catalog of what is readily available to violinists for studies relating to twentieth-century repertoire. More studies in this area exist throughout the world, so those presented here are intended merely as a starting point. The document also contains factual information about the studies, as well as performance and theoretical analysis and biographical information about the composers. This information is designed to serve a variety of purposes. The factual and biographical information may be used by the violinist to choose appropriate etudes for himself/herself or a student. Later, the in-depth analysis will assist players throughout the …

Lattice Boltzmann Simulation Of Flow Around Bluff-Bodies, Kevin Tubbs

LSU Master's Theses

In this work, results from a 2-D Lattice Boltzmann (LB) solver are presented simulating flow past rectangular square cylinders at low Reynolds numbers (< 250). The LBGK equation is a hyperbolic equation that approximates the Navier Stokes equations in the nearly incompressible limit. It is a system of 9 one dimensional partial differential Hamiltonian-Jacobian equations, consisting of an advection and diffusive portion. The LB method is an alternative computational fluid dynamics (CFD) method used to numerically predict incompressible viscous flow. The current LB method uses a statistical mechanics formulation to solve the Boltzmann equation. The LB model captures the nonlinear Navier Stokes advection terms using linear streaming operators. In this thesis, the LB model is classified as an explicit, Lagrangian, finite-hyperbolicity and weakly compressible approximation of the Navier Stokes equations. The momentum flux tensor is captured locally as opposed to a pressure field eliminating the need to solve the Poisson equation. This allows the fluid structure interactions (FSI) behavior to be calculated elegantly at the interface through the mesoscopic momentum transfer between the fluid and structure. At this level, the forces are simultaneously calculated. The LB equations are discretized both in time and phase space using a standard D2Q9 lattice model. Validation tests for flow around single square cylinders at different aspect ratio at low Reynolds numbers are presented. Good agreement with other investigators is achieved. Flow past multiple bluff bodies (representing building in a city) is also presented. The vortex shedding simulations presented provide preliminary indications in terms of St that the LB method can be used to simulate high Re flow.

Material Length Scales In Gradient-Dependent Plasticity/Damage And Size Effects: Theory And Computation, Rashid Kamel Abu Al-Rub

LSU Doctoral Dissertations

Structural materials display a strong size-dependence when deformed non-uniformly into the inelastic range: smaller is stronger. This effect has important implications for an increasing number of applications in structural failure, electronics, functional coatings, composites, micro-electro-mechanical systems (MEMS), nanostructured materials, micro/nanometer fabrication technologies, etc. The mechanical behavior of these applications cannot be characterized by classical (local) continuum theories because they incorporate no ‘material length scales’ and consequently predict no size effects. On the other hand, it is still not possible to perform quantum and atomistic simulations on realistic time and structures. It is therefore necessary to develop a scale-dependent continuum theory …

Constructive Habituation As An Educational Approach To Process-Object Reification In Mathematics, Alonzo F. Peterson

LSU Doctoral Dissertations

Sfard and Thompson (1994) state that what matters most is that educators develop ways of thinking, teaching, and learning mathematics. This study introduced constructive habituation, a new strategy developed to aid both students and teachers in the thinking, teaching, and learning of mathematics. Constructive habituation attempts to unite constructivist teaching methods aimed at supporting students’ conceptual understanding of content and habituationist teaching method aimed at establishing routine responses to routine tasks. This study is exploratory in nature, designed to investigate if constructive habituation is a more effective means than a traditional teaching method in helping students reach process-object reification as …

The Fate Of Bifenthrin And Fipronil In Pine Bark Nursery Media, Russell Stanley Harris, Iii

LSU Master's Theses

Concerns over the adverse effects of pesticides on human health and the environment have led to the development of stricter pesticide regulations and the outright banning of many pesticides in the U.S. Bifenthrin and fipronil are important pesticides used in the nursery industry for the control of imported fire ants (Solenopsis invicta Buren, S. richteri Forel, and their hybrids) to meet the requirements of the Imported Fire Ant Quarantine. Nurseries typically use highly-organic media ("soilless" media) and little is known about the fate of these pesticides when used with these media. Our research measured the influence of irrigation frequency and …

Taxing Political Donations: The Case For Corrective Taxes In Campaign Finance, David Gamage

Articles by Maurer Faculty

Command-and-control regulations are generally thought to be inferior to incentive-based alternatives. This essay proposes an incentive-based approach for regulating campaign finance. In place of our current regime of contribution ceilings, the essay calls for a graduated system of contribution taxes. Rather than capping the size of political donations at a specified dollar level, we should tax donations based on a schedule of graduated rates - the larger the size of a contribution, the higher the level of taxation.

Contribution taxes generate two primary advantages over contribution ceilings. First, contribution taxes preserve more total surplus. This surplus can be shared by …

Better Writing, Better Thinking: Using Legal Writing Pedagogy In The "Casebook" Classroom (Without Grading Papers), Mary Beth Beazley

Scholarly Works

In this Article, Professor Beazley proposes that a Legal Writing revolution is the next revolution in legal education, and that the revolution is not just coming, it has begun. She offers first steps for law school faculty to take in furtherance of this revolution. Professor Beazley argues that the pioneers of this new revolution are Legal Writing faculty. Section I of this Article examines some ways that the law school culture that segregates Legal Writing faculty has both promoted their opportunities to develop innovative pedagogies and inhibited their ability to share those pedagogies with other faculty. Section II explains certain …

Evolution Of Base Substitution Gradients In Primate Mitochondrial Genomes, Sameer Raina

LSU Master's Theses

The availability of large amounts of genetic data from the mitochondrial DNA of species has created an unprecedented opportunity for the study of evolutionary processes. Being our closest relatives on the evolutionary tree the primates are a prime candidate for the study of evolutionary processes. The availability of large amounts of genetic data from the primates allows us to study and compare results from different phylogenetic reconstruction methods and to study and trace rudimentary evolutionary processes within the primate lineage. The evolutionary process studied here is the response of the nucleotide frequency ratios to single-strandedness of sites during mitochondrial DNA …

Travel Time Tomographic Imaging Of The Distribution Of The Effective Stress In Clean Sand Under A Model Footing, William M. Tanner

LSU Master's Theses

The use of high-speed data acquisition systems, inexpensive and reliable transducers, and better models of interpretation have combined to make elastic wave tomographic imaging of geotechnical engineering systems easier to accomplish both in the laboratory and in the field. An important application of these developments is that the evaluation of states of effective stress in soils using images of elastic wave velocity distribution. As a consequence, it is possible to experimentally estimate the state of induced and in-situ effective stresses and to compare these results with established models of stress distribution based on the theory of elasticity (e.g., Boussinesq’s solution). …

Modeling Event-Based Coupled Hydrologic And Mass Transport In Small Urban Watersheds, Yuhong Sheng

LSU Doctoral Dissertations

To investigate the event-based coupled hydrologic and mass transport processes of particulate matter and their eventual fate in unit operations/processes, several methodologies were developed. Discrete rainfall-runoff events data were collected at two similar urban watersheds for model calibration and verification. A mathematically and physically-based criterion was proposed to differentiate rainfall-runoff events between either mass-limited or flow-limited. Statistical techniques of Logistic Regression and Discriminant Analysis were utilized to derive classification rules for event categories based on hydrologic data only. With watersheds assumed as either lumped systems or distributed systems, physically-based semi-empirical models were developed to simulate particulate mass delivery process during …

Software Architecture: Styles And Representational Schemes, Somo Subro Banerjee

LSU Master's Theses

Software architecture is being widely used today to describe a very high-level design methodology of large software systems. Software architecture represents the overall structure of a system in an abstract, structured manner. A good architectural representation scheme holds the key to the effectiveness of a software architecture description and usage. In this work we look at architectural styles and architectural representation schemes. We propound the idea that the layered architectural model is a suitable candidate for a generalized architectural style and that it can cater to many different problem domains, other than the message-passing systems it has traditionally been used …

Synthesis, Characterization And Study Of Novel Reagents For The Detection Of Saccharides And Amino Acids, Nadia Nadette St. Luce

LSU Doctoral Dissertations

The design of synthetic receptors for the recognition and sensing of saccharides and amino acids is currently a major challenge. This is due to inherent structural similarity and a lack of chromophoric or fluorophoric properties of these compounds. The synthesis and study of novel detection agents for bioactive molecules as well as mechanistic studies are presented herein. The elucidation of the mechanism by which tetraarylboronic acid resorcinarene interact with sugar molecules and promote a solution color change is explored. This vast collaborative study, reveals that DMSO solutions of boronic acid functionalized resorcinarene macrocycles afford visual color changes upon heating or …