Physical Sciences and Mathematics Commons^™

Measurement Of The Strange Sea Of The Proton, Gary A. Rutledge

Dissertations, Theses, and Masters Projects

The differential cross section for elastic scattering of longitudinally-polarized electrons from protons exhibits a parity-violating asymmetry, due to the interference between weak and electromagnetic amplitudes. The asymmetry is extracted from the detector counting rates as APV = ( Dr - Dl)/(Dr + D l) where Drl are related to the right (left) differential cross sections sigmar, sigmal respectively. Thus APV = (sigmar - sigma l)/(sigmar + sigmal) for right-handed and left-handed electrons. This asymmetry is sensitive to the presence of strange sea quarks in the proton, in particular to the strange vector matrix elements GsE and GsM .;In an experiment …

Depth-First Search Embedded Wavelet Algorithm For Hardware Implementation, Li-Minn Ang

Theses: Doctorates and Masters

The emerging technology of image communication over wireless transmission channels requires several new challenges to be simultaneously met at the algorithm and architecture levels. At the algorithm level, desirable features include high coding performance, bit stream scalability, robustness to transmission errors and suitability for content-based coding schemes. At the architecture level, we require efficient architectures for construction of portable devices with small size and low power consumption. An important question is to ask if a single coding algorithm can be designed to meet the diverse requirements. Recently, researchers working on improving different features have converged on a set of coding …

Change Of Support Correction In Mineral Resource Estimation, Marek J. Janas

Theses: Doctorates and Masters

The success of any mining operation greatly, if not entirely, depends on the accuracy of prediction of recoverable mining reserves. However, prior to mining, knowledge about the distribution of the Selective Mining Unit (SMU) is limited. The SMU represents the volume on which extraction of ore takes place and on which recoverable mining reserves are based. Realistic recoverable reserve estimates can be obtained from the grade-tonnage curve that corresponds to the unknown distribution of the SMU rather than to the distribution of exploration sample data. In general, if the reserve calculation, at the given cut-off grade, is based upon exploration …

A Small Look At The Big Picture: Linking Geopotential Height Anomalies To Paleofloods On The Snake River, Idaho And Oregon, Gwendolyn Bernitha Rhodes

All Master's Theses

A combined paleoflood and flood hydroclimatology study on the Snake River in Idaho and Oregon suggests a link between floods and patters of geopotential height anomalies over the North Pacific Ocean. Examination of the paleoflood record in two 4-m (12 ft) tall terraces along the Hells Canyon reach of the Snake River in Idaho and Oregon shows evidence of at least twenty-two late-Holocene extreme floods that occurred approximately 5,000 years. The ages of paleoflood deposits at these sites fall into two time periods, from 5130 ± 40 to 1960 ± 40 yr BP and from 320 ± 40 yr BP …

Comparison Of Statistical And Model-Based Hindcasts Of Subtidal Water Levels In Chesapeake Bay, Kathryn Thompson Bosley, Kurt W. Hess

CCPO Publications

Subtidal water levels in Chesapeake Bay, which can have amplitudes as large as 1 m at Baltimore, are an important component of total water levels. The most importance forcing mechanisms for these variations are surface winds over the Bay and coastal subtidal water levels. Two methods for hindcasting subtidal water levels in the Bay were developed: statistical prediction (based on multiple linear regression) and a barotropic numerical circulation model-based prediction. The hindcast water levels were compared with the observed values at three key locations (Chesapeake Bay Bridge Tunnel (CBBT) in the lower bay near the mouth, Solomons Island at midbay, …

Gis Data: Essex County And The Town Of Tappahannock Shoreline Situation Report, Marcia Berman, Harry Berquist, Sharon Dewing, J. B. Glover, Carl Hershner, Tamia Rudnicky, Dan Schatt, Kevin Skunda

Data

The data inventory developed for the Shoreline Situation Reports are based on a three-tiered shoreline assessment approach. This assessment characterizes conditions in the shorezone observed from a small boat moving along the shoreline. Handheld GPS units record data observations in the field. 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

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

Three GIS coverages are generated from the collection technique. The essex_lubc coverage are features …

An Investigation Into The Use Of Software Code Metrics In The Industrial Software Development Environment, Tim Littlefair

Theses: Doctorates and Masters

This work describes a project that investigates the use of software metrics based on measurement of source code in industrial software development. Literature is examined relating to considerations of quality in industry; to software engineering; to emergent technologies in the software industry including the object-oriented paradigm and software patterns; to software product and process metrics; and to cultural factors affecting workplaces in the software industry. It then expounds theoretical and practical work aimed at specifying, designing and implementing a source code analyzer for use in a typical industrial project setting. There is an explanation of the design and outcomes of …

Virginia Marine Infrastructure Needs Assessment, Thomas J. Murray

Reports

In an effort to support Virginia's application for federal grant funds under the Department of Interior's "Boating Infrastructure Grant Program" (Grants), the Marina Technical Advisory Program (MTAP) at the Virginia Institute of Marine Science has undertaken assessment of the state's recreational boating infrastructure needs.1 A total of$32 million has been authorized over four years to fund this new program. It is designed to help states develop and maintain facilities for transient, non-trailerable (26' and over) recreational boats. The Virginia Department of Health (VDOH) is providing overall leadership in the Boating Infrastructure Grants process, supported by the Virginia Sea Grant College …

Virginia Game Fish Tagging Program Annual Report 2000, John A. Lucy, C.M. Bain Iii

Reports

The Virginia Game Fish Tagging Program (VGFTP), in its sixth year during 2000, systematically trains and assists anglers in tagging a select number of species important to Virginia's marine recreational fishery and maintains the resulting tagging database. A cooperative project of the Virginia Marine Resources Commission and the Virginia Institute of Marine Science (VIMS), the program is primarily funded with revenues from Virginia's saltwater recreational fishing license funds (Recreational Fishing Development Fund). In addition, support for the program is provided by Virginia's Sea Grant Marine Advisory Program at VIMS.

Towards Comparative Profiling Of Parallel Applications With Pperfdb, Christian Leland Hansen

Dissertations and Theses

Due to the complex nature of parallel programming, it is difficult to diagnose and solve performance related problems. Knowledge of program behavior is obtained experimentally, with repeated runs of a slightly modified version of the application or the same code in different environments. In these circumstances, comparative performance analysis can provide meaningful insights into the subtle effects of system and code changes on parallel program behavior by highlighting the difference in performance results across executions.

I have designed and implemented modules which extend the PPerfDB performance tool to allow access to existing performance data generated by several commonly used tracing …

Resource Notes-Academic Year 2000-01

Conservation and Survey Division

No abstract provided.

Adams County Test Hole Logs, Perry B. Wigley

Conservation and Survey Division

No abstract provided.

Logan County Test Hole Logs, Perry B. Wigley

Conservation and Survey Division

No abstract provided.

Saunders County Test Hole Logs, Raymond R. Burchett, Scott E. Summerside

Conservation and Survey Division

No abstract provided.

Field Trip Guide (For The Nebraska Well Drillers Association) Western Nebraska Geology, J. Cannia, D. Weinert, D. Brost, C. Miller, D. Carlson

Conservation and Survey Division

No abstract provided.

What Is Environmental Literacy? (Book Review), Aldemaro Romero Jr.

Publications and Research

No abstract provided.

Asymptotic Analysis Of Buffered Calcium Diffusion Near A Point Source, Arthur Sherman, Gregory D. Smith, Longxiang Dai, Robert M. Miura

Arts & Sciences Articles

The "domain" calcium (Ca2+) concentration near an open Ca2+ channel can be mod- eled as buffered diffusion from a point source. The concentration profiles can be well approximated by hemispherically symmetric steady-state solutions to a system of reaction-diffusion equations. After nondimensionalizing these equations and scaling space so that both reaction terms and the source amplitude are 0(1), we identify two dimensionless parameters, Cc and Eb, that correspond to the diffusion coefficients of dimensionless Ca2+ and buffer, respectively. Using perturbation methods, we derive approximations for the Ca2+ and buffer profiles in three asymptotic limits: (1) an "excess buffer approximation" (EBA), where …

Changes In Mirror Lake, Northwestern Washington, As A Result Of The Diversion Of Water From The Nooksack River, Karel Tracy

WWU Graduate School Collection

Mirror Lake, a small lake in northwest Washington, has been used as a settling pond for water diverted from the Middle Fork of the Nooksack River since 1962. In this thesis, I combine bathymetric data and sediment sampling to document the changes in sedimentation that have resulted from this diversion, and compare these results to a previous study conducted in 1991.

To document the change in the bathymetry of Mirror Lake since 1991, I surveyed the lake in the summer of 2000 using a theodolite and sonar depth gauge. I compared a contour map generated from this survey to the …

Late Pleistocene Littoral Deposits In The Deming Sand At Bellingham Bay, Washington, And Their Implications For Relative Sea Level Changes, Stacy J. (Stacy Joanna) Weber

WWU Graduate School Collection

Recent mass wasting of sea cliffs along Bellingham Bay in Northwest Washington has exposed late Pleistocene littoral deposits in the Deming sand, which is underlain by Kulshan glaciomarine drift (gmd) and overlain by Bellingham glaciomarine drift (Easterbrook 1963). Marine shells in the Kulshan gmd were dated at 12,210 ± 80 ¹⁴C-yrs B. P. and marine shells in the Deming sand were dated at 11,760 ± 85 and 11,685 ± 85 ¹⁴C-yrs B. P. Marine shells in the Bellingham gmd were dated at 12,150 + 210 ¹⁴C-yrs B. P.

Fossiliferous Kulshan glaciomarine drift is overlain by 11.5 m …

Petrology And Geochemistry Of Mafic Lavas Near Glacier Peak, North Cascades, Washington, Dylan D. (Dylan Douglas) Taylor

WWU Graduate School Collection

Major element, trace element, and mineral compositions have been determined for four Quaternary mafic monogenetic cinder cones and flows south of Glacier Peak, a dacitic stratovolcano in the northern Cascade arc. The flows are the Whitechuck basalt, and the basaltic andesites of Indian Pass, Lightning Creek, and Dishpan Gap. Whitechuck has high concentrations of AI₂O₃ (≥ 18 wt.%) and low concentrations of K₂O (≤ 0.45 wt.%) and shares similar trace element characteristics with high alumina olivine tholeiites reported in the central and southern Cascades. The three basaltic andesites are calc-alkaline. Indian Pass and Lighting Creek …

Geology Of The Cooper Mountain Pluton, North Cascade Mountains, Washington Based On Magnetic Fabrics, Magnetic Remanence And Petrography, Tammy C. Fawcett

WWU Graduate School Collection

A study of the 48 Ma Cooper Mountain pluton (CMP) in the North Cascade Mountains of Washington using anisotropy of magnetic susceptibility (AMS) defined the orientation of magnetic fabrics. Fabrics in limited areas at the margins of the CMP tend to be parallel to the pluton margin and are therefore interpreted to be emplacement-related. The fabrics in the interior of the body, throughout the bulk of the pluton, are discordant with respect to the NW pluton margin. The fabric is manifest by NW-striking, moderately to steeply dipping foliation and NW-SE trending, moderately to shallowly plunging lineation, approximately parallel to regional …

Slope Control In Western Boundary Currents, Sang-Ki Lee, J. L. Pelegri, John Kroll

Mathematics & Statistics Faculty Publications

An analytic solution is presented for the steady-state depth-averaged western boundary current flowing over the continental slope by combining three highly idealized models: the Stommel model, the Munk model, and the arrested topographic wave model. The main vorticity balance over the slope is between planetary vorticity advection and the slope-induced bottom stress torque, which is proportional to rv(h^-1)_x where r is the Rayleigh friction coefficient, h is the water depth, and v is the meridional velocity. This slope-induced torque provides the necessary source of vorticity for poleward flow over the slope, its simple interpretation being …

The Range Of The Iterated Matrix Adjoint Operator, Tze-Jang Chen, Jenn-Tsann Lin, C. H. Cooke

Mathematics & Statistics Faculty Publications

The following inverse problem is considered: for a given n × n real matrix B, does there exist a real matrix A such that where the classical adjoint operation is intended? The rank of B and the number of applications of the adjoint operator determine the character of this general inverse problem for the iterated adjoint operator. Thus, for given B, the question of interest is whether or not B lies in the range of the iterated matrix adjoint operator. Maple V R5 is used as an aid to obtain results indicated here. (©) 2001 Elsevier Science Ltd. …

A New Compensating Element For A Femtosecond Photoelectron Gun, Bao-Liang Qian, Hani E. Elsayed-Ali

Electrical & Computer Engineering Faculty Publications

Design and analysis of a new compensating element for improving the electron pulse front and compressing the pulse duration in a femtosecond photoelectron gun are described. The compensating element is a small metallic cylindrical cavity in which an external voltage is applied in such a way that a special electric field forms and interacts with the electron pulse. This electric field reduces the distances between the faster and slower electrons inside the cavity and efficiently compensates for electron pulse broadening caused by the photoelectron energy spread and space charge effects. Poisson's equation and the equation of motion are solved to …

Time-Resolved Structural Study Of Low-Index Surfaces Of Germanium Near Its Bulk Melting Temperature, Xinglin Zeng, H. E. Elsayed-Ali

Electrical & Computer Engineering Faculty Publications

The structure of the low-index surfaces of germanium near its bulk melting temperature is investigated using 100-ps time-resolved reflection high-energy electron diffraction. The surface is heated by 100-ps laser pulses while a synchronized electron beam probes the structure. Ge(111)was observed to remain in its incomplete melting structure up to at least T_m + 134 ± 40 K when heated by a 100-ps laser pulse. Both the Ge(100) and Ge(110) surfaces are observed to melt near the bulk melting temperature when heated with 100-ps laser pulses. Because of the low-diffraction intensity-to-background ratio at high temperatures and because of the temperature …

Boron-Doped Homoepitaxial Diamond (100) Film Investigated By Scanning Tunneling Microscopy, Bing Xiao, Weihai Fu, Sacharia Albin, Jason Moulton, John Cooper

Electrical & Computer Engineering Faculty Publications

Conducting epitaxial diamond films of high quality are essential for many diamond studies and diamond electronic device fabrication. We have grown boron-doped epitaxial diamond films on type Ila natural diamond (100) substrates by microwave plasma chemical vapor deposition. A gas mixture of H₂/CH₄ was used. Boron doping was done by placing solid sources of pure boron in the microwave plasma. Homoepitaxial films with atomic smoothness were achieved under the following growth conditions: substrate temperature 900 °C, gas pressure 40 Torr, and gas flow rates of H₂/CH₄ = 900/7.2 seem. The growth rate was 0.87 …

Potential Nrm Structures For Western Australia, Department Of Agriculture And Food, Western Australia

All other publications

A discussion paper to scope and present options for regional Natural Resources Management (NRM) structures suited to Western Australia’s South West agricultural division.

Electron Cyclotron Resonance Heating In Spherical Plasmas: O-X-Ebw Mode Conversion In Mast, Josef Preinhaelter, M. A. Irzak, Linda L. Vahala, George Vahala

Electrical & Computer Engineering Faculty Publications

Using a full wave solution, the O-X-EBW mode conversion is examined for density and magnetic profiles in MAST. The effects of magnetic shear and the sharp density pedestal for H-mode operation are considered with an eye to understanding both electron cyclotron emission (ECE) and electron cyclotron resonance heating (ECRH).

Weathering Crust Processes On Melting Glacier Ice (Alberta, Canada), Corinne Joanne Schuster

Theses and Dissertations (Comprehensive)

This thesis examines the relationship between the energy balance and hydrology of a glacier at the ice surface interface during the melt season. Experimental sub-catchments were established on the ablation area of the Peyto Glacier, Alberta, Canada, during the summers of 1994, 1995 and 1997. These sub-catchments were equipped with meteorological and hydrological instrumentation to examine relationships in the surface layer. Specifically, the development of a phenomenon known as the weathering crust is followed by examining the ratio between potential surface lowering (calculated from energy available for melt) and actual surface lowering (as measured in the field). This enables an …

An Assessment Of The Role And Impact Of Non-Governmental Organizations (Ngos) In The Management And Sustainability Of Local Environmental Resources: A Case Study Of Nanun, Ghana, Iddrisu Adam

Theses and Dissertations (Comprehensive)

NGOs have been heralded as the vehicle of choice for aid delivery by international organizations lice the World Bank and the United Nations and also by western governments, especially in the last two decades. This is a tacit acceptance of their role as development agents in the South. However, no substantive research has been done to find out if these NGOs are indeed contributing to the better management of local environmental resources. This research sets out to examine the role and impact of non-governmental organizations (NGOs) in the management and sustainability of local environmental resources in rural Ghana. What makes …