Physical Sciences and Mathematics | Open Access Articles

Nuckolls County Test Hole Logs, Scott E. Summerside

Conservation and Survey Division

No abstract provided.

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Seward County Test Hole Logs, Raymond R. Burchett, Frank A. Smith

Conservation and Survey Division

No abstract provided.

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Field Trip Guide (For The Nebraska Well Drillers Association) Northeastern Nebraska Geology, S. Olafsen-Lackey, D. Eversoll

Conservation and Survey Division

No abstract provided.

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Effects Of A Yec Apologetics Class On Student Worldview, David A. Dewitt, Steve Deckard, Sharon E. Cargo

Faculty Publications and Presentations

Creationism is a significant component of an overall Christian worldview. A Creation Worldview Test (CWT) was administered to students both before and after completion of a required Apologetics course dealing with the creation/evolution controversy. Pre-test analysis revealed that incoming students tend to have a creationist worldview, however their CWT scores reflected a degree of uncertainty or neutrality on scientific creation and the age of the earth. Post-test analysis showed a significant shift toward a young earth creationist (YEC) view. Implications for teaching apologetics and development of a Creationist worldview based on a Six-day Young Earth perspective were explored and identified.

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Assessing The Decision-Making Process In Wetlands Resources Management In Virginia, Ratana Chuenpagdee, Kirk J. Havens, Thomas A. Barnard, Patty Richards

Reports

No abstract provided.

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Delineation Of Landslide Slip Surfaces Using Ground Penetrating Radar As Compared And Contrasted With Existing Slip Surface Data: Evaluation Of Gpr For Landslide Slip Surface Determination, Michael E. (Michael Eric) Hutchinson

WWU Graduate School Collection

Ground penetrating radar (GPR) was used to investigate two landslides within the South Puget Sound region to evaluate if this technology could be used to delineate slip surface location. The internal structures of two landslides with similar stratigraphic and geographic settings in the South Puget Sound Region were evaluated using GPR. For the two landslides studied, results of prior geologic and geotechnical work identified the location and extent of each landslide slip surface. Longitudinal and latitudinal GPR transects were completed on each landslide mass to map subsurface radar reflection amplitudes (radargrams) and times. To convert radar travel times to depths, …

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A Geological And Geophysical Investigation Of Ice Mountain Algific Talus, Hampshire County, West Virginia, Kevin M. Andrews

Graduate Theses, Dissertations, and Problem Reports

Ice Mountain is an algific talus slope located in Hampshire County, West Virginia, protected for its status as a biological refugium. Both the origin of the slope and the mechanism by which cold air is produced from the base of the slope have remained mysteries to local residents and tourists for many years. This research effort takes a scientific approach to exploring the mysteries of Ice Mountain. Bedrock and surficial geologic mapping provides an understanding of the physical environment of the slope area, while geophysical survey data provide clues to the subsurface of the slope. The algific talus consists of …

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Study Of A Growth Instability Of Γ-In[Sub 2]Se[Sub 3], C. Amory, J. C. Bernede, S. Marsillac

Electrical & Computer Engineering Faculty Publications

γ-In[sub 2]Se[sub 3] thin film are deposited for various substrate temperatures in the range of 523–673 K. This study shows that at 573 and 673 K the thin films are well crystallized with grains aligned along the c axis. Between these temperatures, a domain of instability appears where the γ-In[sub 2]Se[sub 3] thin films have a randomly orientation and the c-lattice parameter increases. The presence of the metastable phase κ-In[sub 2]Se[sub 3], during the growth, can explain the existence of this domain of instability. The insertion of Zn during the preparation process allows us to stabilize the phase κ at …

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Monte Carlo Analysis Of Gan-Based Gunn Oscillators For Microwave Power Generation, R. P. Joshi, V. Sridhara, P. Shah, R. D. Del Rosario

Electrical & Computer Engineering Faculty Publications

Monte Carlo studies of transferred electron oscillators based on bulk wurtzite GaN are presented. Two structures have been examined: (i) devices with the conventional single notch structure, and (ii) repetitive structures with serial segments to fashion a "multiple domain" device. Wurtzite material has been chosen because of the higher drift velocity and because analytical expressions for the band structure have recently become available. Performance parameters of interest such as the operating frequency, output power, and conversion efficiency are calculated. Variations due to changes in temperature, biasing voltage, and device length are also included. It is shown that multidomain Gunn diodes …

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Simple Plane Wave Implementation For Photonic Crystal Calculations, Shangping Guo, Sacharia Albin

Electrical & Computer Engineering Faculty Publications

A simple implementation of plane wave method is presented for modeling photonic crystals with arbitrary shaped ‘atoms’. The Fourier transform for a single ‘atom’ is first calculated either by analytical Fourier transform or numerical FFT, then the shift property is used to obtain the Fourier transform for any arbitrary supercell consisting of a finite number of ‘atoms’. To ensure accurate results, generally, two iterating processes including the plane wave iteration and grid resolution iteration must converge. Analysis shows that using analytical Fourier transform when available can improve accuracy and avoid the grid resolution iteration. It converges to the accurate results …

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Thermoelectric Cooling At Cryogenic Temperatures, S. R. Harutyunyan, V. H. Vardanyan, A. S. Kuzanyan, V. R. Nikoghosyan, S. Kunii, K. S. Wood, Armen Gulian

Mathematics, Physics, and Computer Science Faculty Articles and Research

Experimental results demonstrating Peltier cooling below 10 K are reported, using crystals of the thermoelectric cerium hexaboride (CeB₆). Direct measurements of the Peltier cooling showed δT up to ∼0.2 K in magnitude at T∼4–5 K. All three kinetic parameters: resistivity (ρ), heat conductivity (k), and Seebeck coefficient (S), characterizing the thermoelectric figure of merit ZT=S²T/ρk, were measured, giving high-confidence results.

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Electron Bernstein Wave-X-O Mode Conversion And Electron Cyclotron Emission In Mast, Josef Preinhaelter, Pavol Pavlo, Vladimir Shevchenko, Martin Valovic, Linda L. Vahala, George Vahala

Electrical & Computer Engineering Faculty Publications

Electron cyclotron emission (ECE) from overdense plasmas can only occur due to electron Bernstein waves (EBW) mode converting near the upper hybrid region to an electromagnetic wave. Experimental data of ECE observations on MAST are studied and compared with EBW-X-O mode conversion modeling results.

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Compact Supercell Method Based On Opposite Parity For Bragg Fibers, Wang Zhi, Ren Guobin, Lou Shuquin, Liang Weijun, Shangping Guo

Electrical & Computer Engineering Faculty Publications

The supercell- based orthonormal basis method is proposed to investigate the modal properties of the Bragg fibers. A square lattice is constructed by the whole Bragg fiber which is considered a supercell, and the periodical dielectric structure of the square lattice is decomposed using periodic functions (cosine). The modal electric field is expanded as the sum of the orthonormal set of Hermite-Gaussian basis functions based on the opposite parity of the transverse electric field. The propagation characteristics of Bragg fibers can be obtained after recasting the wave equation into an eigenvalue system. This method is implemented with very high efficiency …

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Variability Of Metals In Soils In The Sudbury Area (Ontario), Vera Spektor

Theses and Dissertations (Comprehensive)

Industrial development influences the natural and human environment. At the local scale, the most intensive industrial pollution is in the area of factories and industrial centers. Industrial pollution is concentrated in soil and vegetation (then, using water systems and trophic chains it may enter all ecosystem components). The industrial pollution of the Sudbury region includes mostly sulfur dioxide and heavy metals. The main goal of this study was to examine spatial variability in metal distribution in soil for the Sudbury area. Objectives of the work were to describe metal distribution depending on geographic factors such as topographic location, vegetation cover, …

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Developing A Conceptual System Model For Ecological Integrity Planning In The Greater Kluane Region, Yukon, Brent Heyward Parker

Theses and Dissertations (Comprehensive)

Understanding the complexity and ecological organization of protected area ecosystems, and their bioregional surroundings, is fundamental to maintaining their integrity. This research set out to integrate the bodies of systems and hierarchy theory to establish a framework for developing a conceptual model that would synthesize knowledge from diverse fields and identify key system processes, thereby providing new insight into ecosystem organization, function, and integrity. This understanding was then applied to planning for ecological integrity in the Canadian National Parks context through a case study of Kluane National Park and Reserve (KNP&R) within the Greater Kluane Region (GKR). The methodology characterized …

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The Relationships Of Vegetation And Bird Communities With Landforms And Geomorphic Processes On The Central Niagara Escarpment (Ontario), Robert John Milne

Theses and Dissertations (Comprehensive)

This study has examined the relationships between geomorphic form and process, vegetation composition and dynamics, and avian populations for landscapes in the central Niagara Escarpment, Southern Ontario. This includes an area extending from Speyside Conservation area near Milton to Mono Cliffs Provincial Park north of Orangeville. Data was collected for geomorphic form and process parameters, vegetation species and structural parameters, and avian species. The physical parameters included a combination of landform characteristics including slope angle, aspect, and landscape position and geomorphic processes, such as creep and debris slides, measured as a level of disturbance. Human levels of disturbance were also …

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Boundary Volume And Length Spectra Of Riemannian Manifolds: What The Middle Degree Hodge Spectrum Doesn't Reveal, Carolyn S. Gordon, Juan P. Rossetti

Dartmouth Scholarship

No abstract provided.

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Optimal Entanglement Generation From Quantum Operations, Matthew S. Leifer, L. Henderson, N. Linden

Mathematics, Physics, and Computer Science Faculty Articles and Research

We consider how much entanglement can be produced by a nonlocal two-qubit unitary operation, UAB—the entangling capacity of U_AB. For a single application of U_AB , with no ancillas, we find the entangling capacity and show that it generally helps to act with U_AB on an entangled state. Allowing ancillas, we present numerical results from which we can conclude, quite generally, that allowing initial entanglement typically increases the optimal capacity in this case as well. Next, we show that allowing collective processing does not increase the entangling capacity if initial entanglement is allowed.

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Spontaneous Magnetization Generated By Spin, Pulsating, And Planar Combustion Synthesis, Karen S. Martirosyan, J. R. Claycomb, G. Gogoshin, R. A. Yarbrough, J. H. Miller Jr., D. Luss

Physics and Astronomy Faculty Publications and Presentations

The motion of the high temperature front during combustion synthesis of ferrite materials generates residual magnetization in cylindrical product samples. The combustion wave created a current density of up to 10 A/cm2, which influenced the magnetization distribution. The measured peak magnetic field intensity was up to 8 mT. Qualitatively different magnetic field maps were generated in ferrite samples synthesized by different combustion modes. The average magnetization vector generated by either planar or pulsating combustion was oriented at a smaller angle with respect to the pellet axis ~f<45°! than those generated by spin combustion ~60°

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Wedge Veg : Gradient Analysis Of Impacts To Coastal Heath Vegetation At Wedge, Western Australia, Steven O'Dwyer

Theses : Honours

A reliable technique to assess impacts to coastal zones is required as coastal areas across the world are under pressure from an increasing human presence. The result is a greater level of disturbance to the coast, both marine and terrestrial. This study addresses a worldwide problem but is focused to a local scale. Wedge, on the central coast of Western Australia, supports a squatter shack settlement and has done so for approximately 50 years. Over time, the number of shacks, campers, tourists, 4WD's and motorbikes has increased. In recent years this growth has been significant. Management of this area and …

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Fox Control In Urban Conservation Reserves: An Analysis Of Bait Uptake And Public Perceptions In The Perth Metropolitan Area, Jennifer Jackson

Theses : Honours

As the world's population becomes increasingly urbanised, the need for people to see nature on their doorstep is becoming more appealing. The city of Perth (Western Australia) has large areas of bushland that have been reserved as conservation estate, and therefore are only minimally modified by urban development. But while many of these urban bushland reserves contribute highly to biodiversity in the form of vegetation, vertebrate surveys have indicated a low diversity of fauna. These areas have the potential to function in a more complete manner as nature reserves with significant conservation value by supporting populations of native animals which …

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Littoral Dripstone And Flowstone--Non-Spelean Carbonate Secondary Deposits, Danko Taborosi, Kevin Stafford

International Journal of Speleology

Speleothem-like dripstone and flowstone deposits can form in the non-spelean environments of marine notches on tropical carbonate coastlines. Hereby termed “littoral dripstone” and “littoral flowstone” to distinguish them from genuine cave deposits, they reflect the basic speleothem types: draperies, stalactites, stalagmites, and columns. Nevertheless, these formations lack the luster and crystallinity of cave analogues, and are not nearly as well-developed, dense, and massive. They are composed of layered microcrystalline aragonite and calcite, are generally highly porous, and invariably overlie dissolutional and bioerosional karren. Because true speleothems, often found in the remnants of solution voids breached by coastal erosion, are also …

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Minerogenesis Of Volcanic Caves Of Kenya, Paolo Forti, Ermanno Galli, Antonio Rossi

International Journal of Speleology

Kenya is one of the few countries in which karst cavities are scarce with respect to volcanic ones, which are widespread throughout the whole country. The great variability in lava composition allowed the evolution of very different cavities, some of which are amongst the largest lava tubes of the world. As normal for such a kind of cave, the hosted speleothems and cave minerals are scarce but important from the minerogenetic point of view. Anyway up to present no specific mineralogical research have been carried out therein. During the 8th International Symposium on Volcanospeleology, held in Nairobi in February 1998, …

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Tree-Mould Caves In Slovakia, Ludovít Gaál

International Journal of Speleology

Four tube-shaped caves are described in this work, which origined in consequence of weathering the trees. Their length ranges from 5.8 to 17 m. All of them occur in neovolcanic rocks of Middle Slovakia, in epiclastic andesite conglomerates, breccias or in the tuffs. Some other caverns are close to the entrance of this caves, however they are inaccessible for a man. Thin rim of silicates (opal or chalcedony) occurs in some of them.

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Contribution To The Speleology Of Sterkfontein Cave, Gauteng Province, South Africa, J. E. J. Martini, P. E. Wipplinger, H. F. G. Moen, A. Keyser

International Journal of Speleology

The authors present more data about the speleological aspect of the Sterkfontein Cave, famous for its bone breccia which yielded abundant hominid remains. They also briefly review the previous voluminous studies by numerous authors, which are mainly dealing with the paleontology, stratigraphy and sedimentology of the breccia. The present investigations were oriented to hitherto poorly investigated aspects such as detail mapping of the cave, its country rock stratigraphy and recording the underground extension of the basal part of the breccia body. The cave consists of a complex network of phreatic channels, developed along joints in Neoarchaean cherty dolostone over a …

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Martel's Routes In Mammoth Cave, Kentucky, 1912, Trevor R. Shaw

International Journal of Speleology

Martel’s own copy of the Hovey 1912 guidebook to Mammoth Cave has his routes marked faintly in pencil on the printed cave plans. These plans are reproduced here, with his routes indicated on them. He generally followed the four standard tourist routes which now included Kaemper’s 1908 discoveries to Violet City, but instead of visiting the Maelstrom he went to Hovey’s Cathedral and Gerta’s Grotto.

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Shock Wave Dispersion In Weakly Ionized Gas, Prasong Kessaratikoon

Physics Theses & Dissertations

Electrodeless microwave (MW) discharge in two straight, circular cylindrical resonant cavities in TE_1,1,1 and TM_0,1,2 modes were introduced to perform additional experimental studies on shock wave modification in non-equilibrium weakly ionized gases and to clarify the physical mechanisms of the shock wave modification process. The discharge was generated in 99.99% Ar at a gas pressure between 20 and 100 Torr and at a discharge power density less than 10.0 Watts/cm³. Power density used for operating the discharge was rather low in the present work, which was determined by evaluating the power loss inside the resonant cavity. …

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Experimental Investigation Of Elemental Incorporation In The Otoliths Of Larval And Juvenile Fish: Implications For Use As Environmental Recorders, Gretchen Bath Martin

Biological Sciences Theses & Dissertations

Innovative techniques for discerning fish stocks, identifying nursery habitats, locating spawning sites, tracing larval transport pathways, and quantifying the degree of population connectivity are required to meet the goals of sustainable management of marine capture fisheries. One of the most promising techniques is the use of elemental signatures in fish otoliths (ear stones), which record valuable life history data and serve as the link between fish and their environment. To validate the assumption that otolith elemental composition is a function of water elemental concentrations, and to address the possible effects of external variables such as temperature and salinity, the composition …

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Crowded And Selective Ultrafilters Under The Covering Property Axiom, Krzysztof Ciesielski

Faculty & Staff Scholarship

In the paper we formulate an axiom CPA_{prism}^{game}, which is the most prominent version of the Covering Property Axiom CPA, and discuss several of its implications. In particular, we show that it implies that the following cardinal characteristics of continuum are equal to \omega₁, while \continuum=\omega₂: the independence number i, the reaping number r, the almost disjoint number a, and the ultrafilter base number u. We will also show that CPA_{prism}^{game} implies the existence of crowded and selective ultrafilters as well as nonselective P-points. In addition we prove that under CPA_{prism}^{game} every …

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Water Quality Characterization And Mathematical Modeling Of Dissolved Oxygen In The East And West Ponds, Jamaica Bay Wildlife Refuge, Krishnanand Maillacheruvu, D Roy, John Tanacredi Ph.D.

Faculty Works: CERCOM (1977-2016)

The current study was undertaken to characterize the East and West Ponds and develop a mathematical model of the effects of nutrient and BOD loading on dissolved oxygen (DO) concentrations in these ponds. The model predicted that both ponds will recover adequately given the average expected range of nutrient and BOD loading due to waste from surface runoff and migratory birds. The predicted dissolved oxygen levels in both ponds were greater than 5.0 mg/L, and were supported by DO levels in the field which were typically above 5.0 mg/L during the period of this study. The model predicted a steady-state …

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Full-Text Articles in Physical Sciences and Mathematics

Nuckolls County Test Hole Logs, Scott E. Summerside

Conservation and Survey Division

Seward County Test Hole Logs, Raymond R. Burchett, Frank A. Smith

Conservation and Survey Division

Field Trip Guide (For The Nebraska Well Drillers Association) Northeastern Nebraska Geology, S. Olafsen-Lackey, D. Eversoll

Conservation and Survey Division

Effects Of A Yec Apologetics Class On Student Worldview, David A. Dewitt, Steve Deckard, Sharon E. Cargo

Faculty Publications and Presentations

Assessing The Decision-Making Process In Wetlands Resources Management In Virginia, Ratana Chuenpagdee, Kirk J. Havens, Thomas A. Barnard, Patty Richards

Reports

Delineation Of Landslide Slip Surfaces Using Ground Penetrating Radar As Compared And Contrasted With Existing Slip Surface Data: Evaluation Of Gpr For Landslide Slip Surface Determination, Michael E. (Michael Eric) Hutchinson

WWU Graduate School Collection

A Geological And Geophysical Investigation Of Ice Mountain Algific Talus, Hampshire County, West Virginia, Kevin M. Andrews

Graduate Theses, Dissertations, and Problem Reports

Study Of A Growth Instability Of Γ-In[Sub 2]Se[Sub 3], C. Amory, J. C. Bernede, S. Marsillac

Electrical & Computer Engineering Faculty Publications

Monte Carlo Analysis Of Gan-Based Gunn Oscillators For Microwave Power Generation, R. P. Joshi, V. Sridhara, P. Shah, R. D. Del Rosario

Electrical & Computer Engineering Faculty Publications

Simple Plane Wave Implementation For Photonic Crystal Calculations, Shangping Guo, Sacharia Albin

Electrical & Computer Engineering Faculty Publications

Thermoelectric Cooling At Cryogenic Temperatures, S. R. Harutyunyan, V. H. Vardanyan, A. S. Kuzanyan, V. R. Nikoghosyan, S. Kunii, K. S. Wood, Armen Gulian

Mathematics, Physics, and Computer Science Faculty Articles and Research

Electron Bernstein Wave-X-O Mode Conversion And Electron Cyclotron Emission In Mast, Josef Preinhaelter, Pavol Pavlo, Vladimir Shevchenko, Martin Valovic, Linda L. Vahala, George Vahala

Electrical & Computer Engineering Faculty Publications

Compact Supercell Method Based On Opposite Parity For Bragg Fibers, Wang Zhi, Ren Guobin, Lou Shuquin, Liang Weijun, Shangping Guo

Electrical & Computer Engineering Faculty Publications

Variability Of Metals In Soils In The Sudbury Area (Ontario), Vera Spektor

Theses and Dissertations (Comprehensive)

Developing A Conceptual System Model For Ecological Integrity Planning In The Greater Kluane Region, Yukon, Brent Heyward Parker

Theses and Dissertations (Comprehensive)

The Relationships Of Vegetation And Bird Communities With Landforms And Geomorphic Processes On The Central Niagara Escarpment (Ontario), Robert John Milne

Theses and Dissertations (Comprehensive)

Boundary Volume And Length Spectra Of Riemannian Manifolds: What The Middle Degree Hodge Spectrum Doesn't Reveal, Carolyn S. Gordon, Juan P. Rossetti

Dartmouth Scholarship

Optimal Entanglement Generation From Quantum Operations, Matthew S. Leifer, L. Henderson, N. Linden

Mathematics, Physics, and Computer Science Faculty Articles and Research

Spontaneous Magnetization Generated By Spin, Pulsating, And Planar Combustion Synthesis, Karen S. Martirosyan, J. R. Claycomb, G. Gogoshin, R. A. Yarbrough, J. H. Miller Jr., D. Luss

Physics and Astronomy Faculty Publications and Presentations

Wedge Veg : Gradient Analysis Of Impacts To Coastal Heath Vegetation At Wedge, Western Australia, Steven O'Dwyer

Theses : Honours

Fox Control In Urban Conservation Reserves: An Analysis Of Bait Uptake And Public Perceptions In The Perth Metropolitan Area, Jennifer Jackson

Theses : Honours

Littoral Dripstone And Flowstone--Non-Spelean Carbonate Secondary Deposits, Danko Taborosi, Kevin Stafford

International Journal of Speleology

Minerogenesis Of Volcanic Caves Of Kenya, Paolo Forti, Ermanno Galli, Antonio Rossi

International Journal of Speleology

Tree-Mould Caves In Slovakia, Ludovít Gaál

International Journal of Speleology

Contribution To The Speleology Of Sterkfontein Cave, Gauteng Province, South Africa, J. E. J. Martini, P. E. Wipplinger, H. F. G. Moen, A. Keyser

International Journal of Speleology

Martel's Routes In Mammoth Cave, Kentucky, 1912, Trevor R. Shaw

International Journal of Speleology

Shock Wave Dispersion In Weakly Ionized Gas, Prasong Kessaratikoon

Physics Theses & Dissertations

Experimental Investigation Of Elemental Incorporation In The Otoliths Of Larval And Juvenile Fish: Implications For Use As Environmental Recorders, Gretchen Bath Martin

Biological Sciences Theses & Dissertations

Crowded And Selective Ultrafilters Under The Covering Property Axiom, Krzysztof Ciesielski

Faculty & Staff Scholarship

Water Quality Characterization And Mathematical Modeling Of Dissolved Oxygen In The East And West Ponds, Jamaica Bay Wildlife Refuge, Krishnanand Maillacheruvu, D Roy, John Tanacredi Ph.D.

Faculty Works: CERCOM (1977-2016)