Physical Sciences and Mathematics Commons^™

An Examination Of Virtual Reality Modeling Language And Its Implications For The Future Of The World Wide Web, Mitch L. Hamelau

Honors Theses, 1963-2015

This project examines the current and future capabilities of Virtual Reality Modeling Language (VRML). VRML is first looked at in terms of its own current capabilities and limitations and then in terms of the impact that it will have on the World Wide Web. Some examples of future changes to the World Wide Web that may come about due to VRML are examined. Then a specific application is used as an example of the advantages VRML provides for developers who use the World Wide Web.

Researching The Growing Technology Of Virtual Reality, David Weinandt

Honors Theses, 1963-2015

Virtual reality is a fast growing technology within the computer science field. The current technologies using virtual reality are invading our everyday lives such as the medical applications of ultrasound and catscans. This technology is changing how we view data, as well as how common user applications are being constructed. The primary focus of the thesis is on the computer code necessary to compute the tracking of users. How the environment is generated, how users and objects are viewed by the computer, and how tracking codestructured on a basic level are some of the questions I cover in my thesis. …

Using Genetic Algorithms To Solve The Geometric Traveling Salesperson Problem, Michael Criswell

Honors Theses, 1963-2015

Genetic Algorithms use life as their model to solve difficult problems in computer science. They use a collection of possible solutions to find an optimal solution in extremely large search spaces. They follow biological processes such as crossover and mutation and implement Darwinian natural selection to use the better solutions to create more possible solutions until an optimal solution has been found. The Traveling Salesperson Problem lies within a class of problems called NP. These problems are not solvable in a reasonable amount of time using classical methods. Genetic Algorithms are an alternative method for attempting to solve such problems. …

Surface Exchange Of Water Vapour Between An Open Sphagnum Fen And The Atmosphere, S. B. Verma

School of Natural Resources: Faculty Publications

No abstract provided.

Conifer Shoot Bidirectional Scattering: Methodology And Preliminary Results, E.A. Walter-Shea, M.A. Mesarch

School of Natural Resources: Faculty Publications

No abstract provided.

The Local Effect Of Intermittency On The Inertial Subrange Energy Spectrum Of The Atmospheric Surface Layer, Jozsef Szilagyi, Gabriel G. Katul, Marc B. Parlange, John D. Albertson, Anthony T. Cahill

School of Natural Resources: Faculty Publications

No abstract provided.

Extracting Ecological And Biophysical Information From Avhrr Optical Data: An Integrated Algorithm Based On Inverse Modeling, B. H. Braswell, D. S. Schimel, J. L. Privette, B. Moore Iii, W. J. Emery, E. W. Sulzman, A. T. Hudak

United States National Aeronautics and Space Administration: Publications

Satellite remote sensing provides the only means of directly observing the entire surface of the Earth at regular spatial and temporal intervals.

The Influence Of Land Use/Land Cover On Climatological Values Of The Diurnal Temperature Range, Kevin P. Gallo, David R. Easterling, Thomas C. Peterson

School of Natural Resources: Faculty Publications

The diurnal temperature range (DTR) at weather observation stations that make up the U.S. Historical Climatology Network was evaluated with respect to the predominant land use/land cover associated with the stations within three radii intervals (100, 1000, and 10 000 m) of the stations. Those stations that were associated with predominantly rural land use/land cover (LULC) usually displayed the greatest observed DTR, whereas those associated with urban related land use or land cover displayed the least observed DTR. The results of this study suggest that significant differences in the climatological DTR were observed and could be attributed to the predominant …

Estimation Of Seasonal Dynamics Of Pasture And Crop Productivity In Kazakhstan Using Noaa/Avhrr Data, Anatoly A. Gitelson, Felix Kogan, Lev Spivak, Edige Zakarin, Lubov Lebed

School of Natural Resources: Faculty Publications

Recently, NOAA developed the AVHRR-based Vegetation Condition Index (VCI) for drought monitoring. This index was used for estimating pasture and crop productivity in Kazakhstan. The results of VCI-derived vegetation conditions were compared with vegetation density, biomass and reflectance measured in different climatic and ecological zones with elevation from 200 to 700 m and a large range of the NDVI variation (over space and season) from 0.05 to 0.47. An estimation error of AVHRR-derived vegetation density was less than 16 per cent. First time it was shown that the VCI-derived vegetation condition data can be effectively used for quantitative assessments of …

Novel Algorithms For Remote Sensing Of Chlorophyll Content In Higher Plant Leaves, Anatoly A. Gitelson, Mark N. Merzlyak, Yuri Grits

School of Natural Resources: Faculty Publications

The general features of reflectance spectra of higher plant leaves are considered with special reference to remote sensing of chlorophyll. Wavelengths with maximum sensitivity to chlorophyll content were found in the wide spectral range from 550 to 630 nm and near 700 nm. The wavelength of the red edge position of the reflectance spectrum correlated very closely with the reflectance at 550 and 700 nm. The ratios of reflectances in the near infra-red range of the spectrum (above 750 nm) to that at 700 nm R_NIR/R₇₀₀ and R_NIR/R₅₅₀ were directly proportional to the leaves' …

Windbreak Management, Craig Stange

School of Natural Resources: Faculty Publications

The windbreaks on your farm are an important part of the agricultural landscape. They provide protection for the farmstead, livestock, and crops; provide habitat for wildlife; and contribute to an overall healthy environment for you and your family. They are living systems with youth, maturity, and old age. Like any other living thing they need proper care and management in order to continue to function at their best.

Windbreak management requires an understanding of how your windbreak works. Your goal is to maintain the health and vigor of individual trees and shrubs while maintaining the overall structure of the windbreak …

Windbreaks For Snow Management, James R. Brandle, H. Doak Nickerson

School of Natural Resources: Faculty Publications

In areas of high winds and blowing snow, windbreaks can reduce the amount of effort spent on snow management. They can be designed to spread snow across a large area or to confine it to a relatively small storage area. The design of your windbreak will depend on your objective. Field windbreaks designed to distribute snow evenly across a field should be tall and porous. In contrast, windbreaks designed to capture snow and control drifting should have multiple rows with high density. There is no one set design, number of rows, or width of planting that is ideal for every …

Equilibrium Structure And Bonding Of Small Iron-Carbon Clusters, Beth K. Nash, B. K. Rao, Puru Jena

Physics Publications

The equilibrium geometries, binding energies, and electronic structure of neutral FeC _n (n≤3) clusters have been calculated self‐consistently using ab initio molecular orbital theory. The exchange and correlation contributions to the total energy were computed using both the density functional method (with and without nonlocal correction) as well as the Hartree–Fock–Möller–Plesset theory. All levels of theory predict the equilibrium geometries to be cyclic. The binding energies, bond lengths, and the Mulliken charges obtained from both methods of calculations are also in agreement. The results are compared with recent mobility and photoelectron spectroscopy experiments.

Effective Behavior Of Clusters Of Microscopic Cracks Inside A Homogeneous Conductor, Kurt M. Bryan, Michael Vogelius

Mathematical Sciences Technical Reports (MSTR)

We study the effective behaviour of a periodic array of microscopic cracks inside a homoge­neous conductor. Special emphasis is placed on a rigorous study of the case in which the corresponding effective conductivity becomes nearly singular, due to the fact that adjacent cracks nearly touch. It is heuristically shown how thin clusters of such extremely close cracks may macroscopically appear as a single crack. The results have implications for our earlier work on impedance imaging.

Applications Of The Upside-Down Normal Loss Function, David Drain, A. M. Gough

Mathematics and Statistics Faculty Research & Creative Works

The upside-down normal loss function (UDNLF) is a weighted loss function that has accurately modeled losses in a product engineering context. The function''s scale parameter can be adjusted to account for the actual percentage of material failing to work at specification limits. Use of the function along with process history allows the prediction of expected loss-the average loss one would expect over a long period of stable process operation. Theory has been developed for the multivariate loss function (MUDNLF), which can be applied to optimize a process with many parameters-a situation in which engineering intuition is often ineffective. Computational formulae …

Asymptotic Analysis Of Oseen Equations For Small Viscosity, R. Temam, X. Wang

Mathematics and Statistics Faculty Research & Creative Works

In this article, we derive explicit asymptotic formulas for the solutions of Oseen's equations in space dimension two in a channel at large Reynolds number (small viscosity ε). These formulas exhibit typical boundary layers behaviors. Suitable correctors are defined to resolve the boundary obstacle and obtain convergence results valid up to the boundary. We study also the behavior of the boundary layer when simultaneously time and the Reynolds number tend to infinity in which case the boundary layer tends to pervade the whole domain.

John U. Lloyd Beach State Recreation Area Nature Guide, Nsu Oceanographic Center

Technical Reports

John U. Lloyd State Park is a 251 acre recreation area located on Ocean Drive in Dania, Broward County, Florida. The park is adjacent to Port Everglades and has a beach front park spanning 2.5 miles. It preserves some of south Florida's vanishing natural resources, while at the same time offers the public usage of beach and water recreational activities. Surf fishing, picknicking, and canoeing along the tidal waterway New River Sound or Whiskey Creek are just some of the activities the public can enjoy.

The recreation area was named in memory of the late John U. Lloyd, Broward County's …

Sea Turtle Conservation Program, Broward County, Fl 1996 Report, Curtis M. Burney, William E. Margolis

Marine & Environmental Sciences Faculty Reports

Since 1978, the Broward County Environmental Protection Department (BCEPD) has provided for the conservation of endangered and threatened sea turtle species within its area of responsibility. Broward County is within the normal nesting areas of three species of sea turtles: the loggerhead sea turtle (Caretta caretta), the green sea turtle (Chelonia mydas) and the leatherback sea turtle (Dermochelys coriacea). The loggerhead is listed as a threatened species, while the green and leatherback are listed as endangered under the U.S. Endangered Species Act, 1973, and Chapter 370, F.S.

Since these statutes strictly forbid any disturbance …

Fall 1996, Nsu Oceanographic Center

Currents

No abstract provided.

Spring 1996, Nsu Oceanographic Center

Currents

No abstract provided.

Winter 1996, Nsu Oceanographic Center

Currents

No abstract provided.

Summer 1996, Nsu Oceanographic Center

Currents

No abstract provided.

The Determination Of The Concentration Of Common Inorganic Anions Using Capillary Zone Electrophoresis: An Analytical Chemistry Laboratory Experiment, Michael A. Janusa

Faculty Presentations

No abstract provided.

Effects Of Analyte Ph On The Accuracy Of Capillary Zone Electrophoresis As A Quantitative Analytical Technique, Michael A. Janusa

Faculty Presentations

No abstract provided.

Designing A Better Matrix For Solidification/Stabilization Of Hazardous Waste With The Aid Of Bagasse (Lignin) As A Polymer Additive To Cement, Michael A. Janusa

Faculty Presentations

No abstract provided.

Improving Circuit Testability By Clock Control, Kent L. Einspahr, Sharad C. Seth, Vishwani D. Agrawal

CSE Conference and Workshop Papers

The testability of a sequential circuit can be improved by controlling the clocks of individual storage elements during testing. We propose several clock control strategies derived from an analysis of the circuit, its S-graph structure, and its function. Through examples we show how the number of clocks affects the circuit’s testability. It is shown that if certain flip-flops (FFs) are scanned (or otherwise initialized), the remaining FFs can be controlled and initialized to any arbitrary state using the clock control. We derive a controllability graph and use it to assign clocks to FFs and to schedule the clocks to set …

Track Structure And Radiation Transport Model For Space Radiobiology Studies, F. A. Cucinotta, J. W. Wilson, Robert Katz, W. Atwell, G. D. Badhwar, M. R. Shavers

Robert Katz Publications

Radiobiology experiments performed in space are deemed necessary for validation of risk-assessment methods. The understanding of space radiobiology experiments must combine knowledge of the space radiation environment, radiation transport, and models of biological response. The heavy ion transport code HZETRN has recently been combined with improved models of the galactic cosmic rays (GCR) and extensive comparisons made to measurements on the space shuttle with a tissue equivalent, proportional counter. HZETRN was also coupled with track-structure models of biological damage from heavy ions. Track-structure calculations using improved models of the radial dose distribution around the path of heavy ions provide a …

Scanning Force Microscopy For The Study Of Domain Structure In Ferroelectric Thin Films, Alexei Gruverman, O. Auciello, H. Tokumoto

Alexei Gruverman Publications

A piezoresponse technique based on scanning force microscopy (SFM) has been used for studying domain structure in ferroelectric thin films. Studies were performed on Pb(Zr_x,Ti_1-x)O₃(PZT) thin films produced by a sol–gel method. The piezoresponse images of the PZT films were taken before and after inducing polarization in the films by applying a direct current voltage between the bottom electrode and the SFM tip. Polarization induced patterns were written with 20 V pulses and subsequently imaged by the SFM piezoresponse technique. The effect of the film structure on the imaging resolution of domains is discussed.

The Ecotourism Equation: Measuring The Impacts, Elizabeth Malek-Zadeh

Yale School of the Environment Bulletin Series

No abstract provided.

On An Investment-Consumption Model With Transaction Costs, Marianne Akian, José Luis Menaldi, Agnès Sulem

Mathematics Faculty Research Publications

This paper considers the optimal consumption and investment policy for an investor who has available one bank account paying a fixed interest rate and n risky assets whose prices are log-normal diffusions. We suppose that transactions between the assets incur a cost proportional to the size of the transaction. The problem is to maximize the total utility of consumption. Dynamic programming leads to a variational inequality for the value function. Existence and uniqueness of a viscosity solution are proved. The variational inequality is solved by using a numerical algorithm based on policies, iterations, and multigrid methods. Numerical results are displayed …