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Full-Text Articles in Physical Sciences and Mathematics
Geosciences Newsletter - 2011, Department Of Geosciences
Geosciences Newsletter - 2011, Department Of Geosciences
Geological and Environmental Sciences News
Vol. 5, No. 1
- Publications
- MGRRE
- Field Trips
- Graduate News
- Alumni
- Advisory Board
- Gifts
- Grants
- Alumni Update
Newsletter, Fall 2011, College Of Arts And Sciences
Newsletter, Fall 2011, College Of Arts And Sciences
Physics Newsletter
Contents from Vol 8, No. 1 of the Newsletter for Friends of the Western Michigan University Department of Physics:
- News
- Staff News
- Faculty News
- Alumni News
- Student News
- Department of Physics Roster
Lessons Learned As A Novice Researcher: A Pilot Study In Mathematics Education, Nicole L. Fonger
Lessons Learned As A Novice Researcher: A Pilot Study In Mathematics Education, Nicole L. Fonger
The Hilltop Review
The lessons we learn in life are often catalyzed by events or happenings that we experience and that subsequently change us in some way. Life as a graduate student is replete with diverse experiences that mold and shape one‘s outlook on teaching, learning, and disciplined inquiry. As a doctoral candidate, my role as a novice researcher is increasingly budding with growth and my responsibilities to design and conduct research have engendered some important lessons. Often confined to private or classroom conversations with graduate students and faculty members, the lessons I have learned as a novice researcher seem worth sharing to …
Modeling Of A Photonic Crystal Waveguide Modes With The Fdtd Method, Buddhi Rai
Modeling Of A Photonic Crystal Waveguide Modes With The Fdtd Method, Buddhi Rai
The Hilltop Review
The electromagnetic modes are investigated using a simple 1D implementation of the FDTD numerical algorithm to a model of 1D photonic crystal. The fields Ez and Hy are simulated along the x-axis, the propagation direction. Source implementation and the effects of various boundary conditions such as ABC, Mur on TF-SF fields are investigated. Of particular focus in this paper is, for example, on investigating the guided and/or radiation modes at a stop band frequency of the photonic crystal formed of linear and Kerr nonlinear media. Such structures exhibit interesting transmission and reflection properties that make them suitable for …
Privacy-Preserving Transactions On The Web, Sahil Behl, Leszek T. Lilien
Privacy-Preserving Transactions On The Web, Sahil Behl, Leszek T. Lilien
The Hilltop Review
There is a rapid growth in the number of applications using sensitive and personal information on the World Wide Web. This growth creates an urgent need to maintain the anonymity of the participants in many web transactions and to preserve the privacy of their sensitive data during data dissemination over the web. First, maintaining the anonymity of users on the World Wide Web is essential for a number of web applications. Anonymity cannot be assured by single interested individuals or an organization but requires participation from other web nodes owned by other entities. Second, preserving the privacy of sensitive data …
Wmu Mobile For Iphone, Christopher A. Ashbay, Justuce Reule, Tim Wickey
Wmu Mobile For Iphone, Christopher A. Ashbay, Justuce Reule, Tim Wickey
Honors Theses
Western Michigan University does not currently have a smart phone application. WMU Mobile for iPhone was created for WMU students as a mobile source for campus news, weather information, and athletics highlights. It also provides connections to various sources of WMU media, and allows users to access GPS maps of campus buildings. The app is designed to allow for future releases which may include allowing the user to view campus events by department and search campus maps. The WMU Mobile for iPhone is accessible on the iPhone, iPod Touch, and iPad, and is available for free through the Apple App …
A Rank-Based Estimate For Cell Lineage Data, Tamer M. Elbayoumi, Jeffrey Terpstra
A Rank-Based Estimate For Cell Lineage Data, Tamer M. Elbayoumi, Jeffrey Terpstra
Research and Creative Activities Poster Day
The presence of aberrant observations (i.e. outliers) in cell lineage data is quite common. As such, it is desirable to have an outlier-resistant estimation procedure as an alternative to least squares estimation (maximum likelihood estimation under normality). In this work, we consider rankbased estimates of the parameters of a first order bifurcating autoregressive [BAR(1)] model. The BAR(1) model was proposed by Cowan and Staudte (1986) for cell lineage data. In it, each line of descendents follows a first order autoregressive [AR(1)] model and allows sister cells from the same mother to be correlated. Real examples and a simulation study are …
K-X-Ray Emission In Fast O5+ On Ar Collisions, Tamer Elkafrawy
K-X-Ray Emission In Fast O5+ On Ar Collisions, Tamer Elkafrawy
Research and Creative Activities Poster Day
The goal of the present work is to observe x-rays from oxygen for the purpose of investigating resonant-transfer and excitation (RTE) [1], and projectile and target x-ray emission resulting from inner-shell capture. Projectile energies in the range 5-25 MeV will be examined to investigate RTE for heavy targets [2,3].
Investigation Of Carbon Sequestration Potential Of The Middle Devonian Sylvania Sandstone, Michigan Basin, U.S.A, Farsheed Rock
Investigation Of Carbon Sequestration Potential Of The Middle Devonian Sylvania Sandstone, Michigan Basin, U.S.A, Farsheed Rock
Masters Theses
The Sylvania Sandstone is an important brine reservoir in Michigan. This study investigates the geological carbon sequestration potential of this reservoir through integrated reservoir characterization using cores, thin sections, core analysis data and modern wireline log data.
Core-to-wireline-log correlation can be used to subdivide the Sylvania Sandstone into conventional reservoir sandstone, and mixed dolostone, low permeability reservoir tripolitic chert and low permeability limestone lithologies. Isolith maps and cross sections indicate that the reservoir sandstone lithology dominates in southeast Michigan and is transitional to a mixture of sandstone, dolostone, tripolitic chert and limestone lithologies toward the northwest that in turn are …
Newsletter, Spring 2011, College Of Arts And Sciences
Newsletter, Spring 2011, College Of Arts And Sciences
Physics Newsletter
Contents of Vol 7, No. 2 of the Newsletter for Friends of the Western Michigan University Department of Physics:
- News
- Staff News
- Alumni News
- Student News
- Department of Physics Roster
- Feedback Form
Geological Controls On Reservoir Quality And Geologic Carbon Sequestration Potential In The Upper Cambrian Mount Simon Sandstone, Kyle Patterson
Geological Controls On Reservoir Quality And Geologic Carbon Sequestration Potential In The Upper Cambrian Mount Simon Sandstone, Kyle Patterson
Masters Theses
The Upper (?) Cambrian Mount Simon Sandstone is an important deep saline geological carbon sequestration (GCS) target throughout the Midwest, USA. The distribution of sedimentary facies, primary mineralogy, and diagenetic alterations and the relationship to wireline log response and reservoir quality throughout the Michigan basin are not well known. This study uses rock core, thin section point counts, x-ray diffraction, inferred spectroscopy, conventional core plug porosity and permeability and pressure fall-off test data to constrain wireline log interpretations of regional geology and reservoir quality.
Prior to the permitting of a CO2 sequestration project, documentation of a robust transient injection …
High Resolution Depositional Analysis Of The Black River Group (Ordovician), Michigan Basin, Jennifer Elaine Schulz
High Resolution Depositional Analysis Of The Black River Group (Ordovician), Michigan Basin, Jennifer Elaine Schulz
Masters Theses
The Ordovician Trenton and Black River carbonates of the Michigan Basin are significant hydrocarbon reservoirs that are characterized by hydrothermal dolomitization. Production has exceeded 132 million barrels of oil with forty new discoveries made in the past three years. The giant Albion-Scipio Trend is often used as a model for other prolific hydrothermal dolomite reservoirs around the world with current models focused on the structural control of reservoir quality dolomite.
Previous studies of the Black River Group have not delimited a well-constrained depositional model. This study integrates high-resolution core interpretations, whole core analysis, and thin section evaluation to determine how …
Prediction Of Petrophysical Properties Of Trenton-Black River (Ordovician) Reservoirs By Comparing Pore Architecture And Permeability To Sonic Velocity, John E. Thornton
Prediction Of Petrophysical Properties Of Trenton-Black River (Ordovician) Reservoirs By Comparing Pore Architecture And Permeability To Sonic Velocity, John E. Thornton
Masters Theses
Reservoir characterization of carbonate rocks is complicated by heterogeneous pore architecture related to primary depositional facies and subsequent diagenesis; this is especially true in diagenetically-altered and structurually-influenced Trenton-Black River reservoirs of the Michigan Basin. Accurate and reliable prediction of reservoir properties within hydrothermal dolomite reservoirs through the use of acoustic properties would aid exploration and characterization both within and outside of the Michigan Basin.
Results indicate that measures of pore architecture when integrated with measures of physical properties into multiple variable linear regression can accurately predict permeability of core plugs. However, due to the highly-heterogeneous distribution of pore architecture and …
The Impact Of Driving Conditions On Phev Battery Performance, Nathan Christensen, John Patten, Steven Srivastava, Gary P. Nola
The Impact Of Driving Conditions On Phev Battery Performance, Nathan Christensen, John Patten, Steven Srivastava, Gary P. Nola
Green Manufacturing Research Journal
The battery performance of a modified Prius with a 5 kWh plug-in battery was documented for a year to determine the impact of environmental conditions and user attributes on vehicle performance. Both fuel economy and pure electrical efficiency were compared to ambient temperature. The fuel economy has a positive relationship with ambient temperature until approximately 70˚F where the efficiency begins to drop. Electrical performance has a positive linear relationship with ambient temperature. With the emergence of electric vehicles (EVs) and PHEVs from a variety of automotive manufacturers, information on EV and PHEV performance for consumers will become more important.
Wind Charged Plug-In Hybrid Electric Vehicle, John Patten, Nathan Christensen, Steven Srivastava, Gary Nola
Wind Charged Plug-In Hybrid Electric Vehicle, John Patten, Nathan Christensen, Steven Srivastava, Gary Nola
Green Manufacturing Research Journal
With the emergence of electric vehicles (EVs), hybrid vehicles HVs) and plug-in hybrid electric vehicles (PHEVs) from a variety of automotive manufacturers, the electrical grid will need to meet new challenges in supplying the electricity required to charge these vehicles. To help supply the electricity needed by these vehicles, we compared the electricity consumption of a modified Toyota Prius (PHEV) and the output of a small residential wind turbine over the course of one year. Our research seeks to determine whether a small residential wind turbine can supply the necessary electricity demanded by the PHEV annually.
Research Report 2011, Western Michigan University
Research Report 2011, Western Michigan University
Physics Research Reports
- Introduction
- From the Chairperson
- Atomic and Molecular Physics
- Condensed Matter Physics
- Nuclear Physics
- Physics Education
- Research and Public Lectures at WMU
- Personnel January 1- December 31, 2011
Commissioning Of The Helical Orbit Spectrometer: A New Device For Measuring Nuclear Reactions In Inverse Kinematics, Jonathan C. Lighthall
Commissioning Of The Helical Orbit Spectrometer: A New Device For Measuring Nuclear Reactions In Inverse Kinematics, Jonathan C. Lighthall
Dissertations
The Helical Orbit Spectrometer (HELIOS) at Argonne National Laboratory is the first implementation of a radical new concept for measuring nuclear reactions. Direct nuclear transfer reactions are powerful tools for studying the properties of the atomic nucleus. A traditional example is the neutron-transfer reaction (d ,p), wherein an accelerated beam of deuterons d bombards a heavy target. The incoming deuteron transfers a neutron to the target nucleus and the outgoing proton p is detected to study the properties of the residual heavy nucleus. A new frontier of nuclear reaction studies involving short-lived exotic nuclei—which are unsuitable for use …
Investigating The Influence Of Organic Acids On Uraninite Solubility And Uranyl Sorption Onto Kaolinite, Michelle L. Barger
Investigating The Influence Of Organic Acids On Uraninite Solubility And Uranyl Sorption Onto Kaolinite, Michelle L. Barger
Dissertations
Within anoxic near surface aqueous settings where U02(S) may be released an opportunity to encounter and complex with organic acids may occur. Reactions between U02(S) and ligands may promote the solubility and mobility of uranium. Organic ligands investigated in the dissolution work include citric acid, NTA and EDTA. Exposure to the ligands had little effect on U02(S) solubility. The log activity of U02(S) hydrolysis under reduced conditions was -6.56. Under all measured conditions of ligand concentration, the data consistently show an increase in uranium concentration to a median log U activity of -4.89. The observed solubility …
Leach-Sm: A Protocol For Extending Wireless Sensor Network Lifetime By Management Of Spare Nodes, Bilal Abu Bakr
Leach-Sm: A Protocol For Extending Wireless Sensor Network Lifetime By Management Of Spare Nodes, Bilal Abu Bakr
Dissertations
Operational lifetime of a wireless sensor network (WSN) depends on its energy resources. Significant improvement of WSN lifetime can be achieved by adding spare sensor nodes to WSN. Spares are ready to be switched on when any primary (a node that is not a spare) exhausts its energy. A spare replacing a primary becomes a primary itself.
The LEACH-SM protocol (Low-Energy Adaptive Clustering Hierarchy with Spare Management) proposed by us is a modification of the prominent LEACH protocol. LEACH extends WSN lifetime via rotation of cluster heads but allows for inefficiencies due to redundant sensing target coverage. There are two …
Bayesian Item Response Theory: Statistical Inference And Power Analysis, Jason W. Bodnar
Bayesian Item Response Theory: Statistical Inference And Power Analysis, Jason W. Bodnar
Dissertations
The regulatory pharmaceutical approval process is flawed in that industry clinical trials (ICTs) are always powered for efficacy and rarely powered for safety. The key safety parameter is the adverse event (AE). This practice may result in efficacious products with confounded safety. An ICT’s ability to be powered for detecting AE trends may improve patient safety. Therefore, this dissertation’s purpose was to determine if power analysis resulted in feasible sample sizes for substantiating AE hypotheses. AEs were modeled with three Bayesian 2PL IRT models. The unidimensional latent trait, transfusion-related AE, was modeled as a patient predisposition for experiencing an AE. …
Electron Transmission Characteristics And The Production Of Narrow Beams Using Glass Optics, Buddhika Senarath Dassanayake
Electron Transmission Characteristics And The Production Of Narrow Beams Using Glass Optics, Buddhika Senarath Dassanayake
Dissertations
Transmission of electrons through an insulating single cylindrically-shaped glass capillary of microscopic dimension has been investigated. Samples made with Borosilicate glass (PYREX 7740) were subjected to bombardment of 300-1000 eV electrons. Transmitted electrons were analyzed using a parallel-plate spectrometer coupled to a channel electron multiplier.
The transmitted electron intensity was found to decrease with increasing sample tilt angle relative to the direction of the primary beam. Two regions of transmission were found: direct where there is no interaction of the beam with the inner capillary wall, and indirect where the beam does interact with the wall. The rate of transmission …
Debugging Support For Message-Passing Based Concurrent Software, Mohamed Medhat Elwakil
Debugging Support For Message-Passing Based Concurrent Software, Mohamed Medhat Elwakil
Dissertations
Today, multi-core processors are used in all computing aspects, including embedded systems such as mobile devices. In order for software programs to benefit from the transition to multi-core processors, the programs need to be concurrent.
Recent research shows that programs developed using the message-passing model can scale better than programs developed using the shared-memory model. However, the message-passing model is not widely adopted, partly, because of the lack of debugging tools. Debugging message-passing programs is very intricate due to their inherent nondeterministic behavior; even with the same input, a program may behave differently when executed multiple times. Bugs in message-passing …
Death By Boredom: The Role Of Visual Processing Theory In Written Evaluation Communication, Stephanie D. H. Evergreen
Death By Boredom: The Role Of Visual Processing Theory In Written Evaluation Communication, Stephanie D. H. Evergreen
Dissertations
Evaluation reporting is an educational act and, as such, should be communicated using principles that support cognition. This study drew upon visual processing theory and theory-based graphic design principles to develop the Evaluation Report Layout Checklist intended to guide report development and support cognition in the readers of evaluation reports. It was then reviewed by an expert panel and applied by a group of raters to a set of evaluation reports obtained from the Informal Science Education evaluation website with maximum variability sampling. Results showed fairly high exact percent agreement and strong to very strong correlation with the author’s ratings. …
Summative Confidence, Paul Cristian Gugiu
Summative Confidence, Paul Cristian Gugiu
Dissertations
Often the singular goal of an evaluation is to render a summative conclusion of merit, worth or feasibility that is based on multiple streams of multidimensional data. Exacerbating this difficulty, conducting evaluations in real-world settings often necessitates implementation of less than ideal study designs. This reality gets further complicated by the standard method for estimating the precision of results via the confidence interval (CI). Traditional CIs offer a limited approach for understanding the precision of a summative conclusion. This dissertation develops and presents a unified approach for the construction of a CI for a summative conclusion (SC).
This study derived …
Relativistic R-Matrix Theory, Janina Grineviciute
Relativistic R-Matrix Theory, Janina Grineviciute
Dissertations
We have developed a relativistic coupled{channel reaction theory in which binary break-up channels satisfy a relative Dirac equation. This theory is developed by extending the R-matrix formalism of Lane and Thomas to the relativistic case and implementing the Dirac oscillator basis. The motivation for this project is testing po- tentials for the dense matter calculations and generating relativistic wave functions for the nal states in the knockout reactions. As an example of the formalism we have calculated observables for the proton scattering on light-to-medium weight nuclei in the relativistic impulse approximation using the relativistic Love-Franey amplitudes of Horowitz. The R-matrix …
Modular And Graceful Edge Colorings Of Graphs, Ryan Jones
Modular And Graceful Edge Colorings Of Graphs, Ryan Jones
Dissertations
Abstract attached as separate file.
Hamiltonicity And Connectivity In Distance-Colored Graphs, Kyle C. Kolasinski
Hamiltonicity And Connectivity In Distance-Colored Graphs, Kyle C. Kolasinski
Dissertations
Abstract attached as separate file.
Robust Adaptive Scheme For Linear Mixed Models, Gabriel Asare Okyere
Robust Adaptive Scheme For Linear Mixed Models, Gabriel Asare Okyere
Dissertations
If the underlying distribution of a statistical model is known then a procedure which maximizes power and efficiency can be selected. For example, if the distribution of errors is known to be normal in a linear model then inference based on least squares maximizes power and efficiency. More generally, if this distribution is known then a ranked based inference based on the appropriate rank score function has maximum efficiency. In practice, though, this distribution is not known. Adaptive schemes are procedures which hopefully select appropriate methods to optimize the analysis.
Hogg (1974) presented an adaptive rank-based scheme for testing in …
Glucosamine-Induced Insulin Resistance In Primary Rat Hepatocytes And The Role Of Selenium As An Insulin Mimetic, Sandhya N. Adiyodi Veetil
Glucosamine-Induced Insulin Resistance In Primary Rat Hepatocytes And The Role Of Selenium As An Insulin Mimetic, Sandhya N. Adiyodi Veetil
Dissertations
Type 2 diabetes is mediated by insulin resistance, the inability of insulin to elicit a normal biological response in insulin responsive tissues. Several cellular models have been utilized to determine the mechanism of induction of insulin resistance but questions remain unanswered. One model, implicates the products of the Hexosamine Biosynthetic Pathway (HBP) in the induction of insulin resistance under hyperglycemia. The major end product of HBP, UDP-GlcNAc, is the substrate for O-GlcNAc transferase, an enzyme that catalyzes the O-GlcNAcylation of numerous proteins. This modification may play a role in induction of insulin resistance and thus needs to be evaluated in …
Spectroscopic Study Of New Sensors For Organophosphates, Metals, And Cyanide Based On Rhodamine And Cholic Acid Derivatives, Arambe Gedara Aruna Weerasinghe
Spectroscopic Study Of New Sensors For Organophosphates, Metals, And Cyanide Based On Rhodamine And Cholic Acid Derivatives, Arambe Gedara Aruna Weerasinghe
Dissertations
Despite the increasing interest in developing sensors for nerve gas agents, efficient detection remains challenging. Among the various sensors developed so far, fluorescence sensors play an important role due to their simplicity. We developed six new rhodamine-based compounds that can be used as fluorescent turn-on sensors. Compound 1 and 3 gave high fluorescent enhancement with diethyl chlorophosphate (DCP) compared to the other compounds. Very high selectivity and sensitivity were observed as these compounds did not show significant fluorescent enhancement with dimethyl methylphosphonate (DMMP), HC1 and transition metal ions. The potential sensor can be used in solution as well as on …