Digital Commons Network^™

Laser Induced Breakdown Spectroscopy For Detection Of Organic Residues Impact Of Ambient Atmosphere And Laser Parameters, Christopher G. Brown

Electronic Theses and Dissertations

Laser Induced Breakdown Spectroscopy (LIBS) is showing great potential as an atomic analytical technique. With its ability to rapidly analyze all forms of matter, with little-to-no sample preparation, LIBS has many advantages over conventional atomic emission spectroscopy techniques. With the maturation of the technologies that make LIBS possible, there has been a growing movement to implement LIBS in portable analyzers for field applications. In particular, LIBS has long been considered the front-runner in the drive for stand-off detection of trace deposits of explosives. Thus there is a need for a better understanding of the relevant processes that are responsible for …

The Role Of Cognitive And Metacognitive Reading Comprehension Strategies In The Reading And Interpretation Of Mathematical Word Problem Texts Reading Clinicians' Perceptions Of Domain Relevance And Elementary Students' Cognitive Strategy Use, Taylar Brooke Clements

Electronic Theses and Dissertations

The intent of this concurrent mixed method study was to examine teacher perceptions and student applications of cognitive reading comprehension strategy use as applied to the reading and interpretation of a mathematics word problem. Teachers’ perceptions of the relevance and application of cognitive reading comprehension strategies to mathematics contexts were investigated through survey methods. Additionally, students’ cognitive strategy use was explored by eliciting verbalization of cognition using think aloud protocol and clinical interview probes with purposively selected first through sixth-grade students. An experimental component of this study involved the random assignment of teachers to a professional development book study focused …

A Comparison Of Eighth Grade Reading Proficiency On State Assessments With The National Assessment Of Educational Progress, Kathryn B. Dyer

Electronic Theses and Dissertations

The National Assessment of Educational Progress is a nationwide assessment administered every other year to eighth grade students in the United States in reading and mathematics. The purpose of this study was to compare the results of 2009 eighth grade state reading assessment proficiency percentages to NAEP proficiency percentages. Primarily, this study examined whether a predictive relationship existed between state and NAEP proficiency percentages. Subsequent research questions analyzed the extent to which a relationship existed for subgroups (race/ethnicity, English Language Learners, low socioeconomic status, and students with disabilities) and while controlling for census regions. It was found that a predictive …

Training Professional School Counseling Students To Facilitate A Classroom Guidance Lesson And Strengthen Classroom Management Skills Using A Mixed Reality Environment, Tiphanie Gonzalez

Electronic Theses and Dissertations

According to the ASCA National Model, school counselors are expected to deliver classroom guidance lessons; yet, there has been little emphasis on graduate coursework targeting the development and implementation of guidance curriculum lessons in PSC training. A national study conducted by Perusse, Goodnough and Noel (2001) was conducted looking at how counselor educators were training “entry level school counseling students” in the skills needed for them to be successful as PSCs. They found that of the 189 school counseling programs surveyed only 3% offered a guidance curriculum course and 13.2% offered a foundations in education course. Inferring that many of …

The Effects Of Delay Of Gratification On The Academic Achievement, Substance Abuse, And Violent Behavior Of Middle-School Students In Alternative Learning Settings, J S. Herndon

Electronic Theses and Dissertations

This study examined the effects of delay of gratification on academic success, substance abuse, and violent behavior. The participants in this study were chosen from an alternative learning school comprised of middle school students in Florida. The hypothesis for this study is as follows: Delay of gratification is negatively related to substance abuse and violent behavior, and positively related to academic achievement. The analysis of the data was conducted on the primary predictor variable (delay of gratification), alternate predictor variables (substance abuse & violent behavior) and the ultimate outcome variable (academic achievement) of this study. Initial statistical inquiry involved descriptive …

The Effectiveness Of Teaching Methods Designed To Improve Student Engagement And Retention Of Physics Subject Matter For Both Science And Non-Science Majors, Dan Maronde

Electronic Theses and Dissertations

The necessity of students’ engagement with the subject matter for successful learning is welldocumented in education research in general, and in physics education research in particular. This study examines the merits of two different programs designed to improve student learning through enhanced student engagement with the material. The target populations of the two programs are different: One is the group of students taking a physical science class as part of the general curriculum required of non-science, non-engineering majors; the other is the group of students, mostly in engineering disciplines, who must take the calculus-based introductory physics sequence as part of …

Design, Fabrication, And Testing Of High-Transparency Deep Ultra-Violet Contacts Using Surface Plasmon Coupling In Subwavelength Aluminum Meshes, Clarisse Mazuir

Electronic Theses and Dissertations

The present work aims at enhancing the external quantum efficiencies of ultra-violet (UV) sensitive photodetectors (PDs) and light emitting diodes (LEDs)for any light polarization. Deep UV solid state devices are made out of AlGaN or MgZnO and their performances suffer from the high resistivity of their p-doped regions. They require transparent p-contacts; yet the most commonly used transparent contacts have low transmission in the UV: indium tin oxide (ITO) and nickel-gold (Ni/Au 5/5 nms) transmit less than 50% and 30% respectively at 300 nm. Here we investigate the use of surface plasmons (SPs) to design transparent p-contacts for AlGaN devices …

Administrator Perspectives Of Post-Secondary Educational Opportunities For Michigan High School Students, Carl Wozniak

Dissertations

Administrator perspectives regarding current and potential increased participation in post-secondary educational opportunities by Michigan high school students were explored in this descriptive quantitative study. Targeted concerns included current institutional levels of involvement, personal knowledge concerning program rules and regulations, efficacy of existing programs, barriers to program expansion, and potential solutions to those barriers as perceived by the participants.

The study utilized an online researcher-created survey instrument and stakeholder and complexity/contingency theories to explore commonalities and differences between three administrator groups. These stakeholders included college dual enrollment officers, school district superintendents, and high school principals. Information gained from the exploration of …

An Analog Experiment Comparing Goal-Free Evaluation And Goal Achievement Evaluation Utility, Brandon W. Youker

Dissertations

Goal-free evaluation (GFE) is the process of determining the merit of an evaluand independent of the stated or implied goals and objectives, whereas goal achievement evaluation (GAE), as the most rudimentary form of goal-based evaluation, determines merit according to the evaluand’s level of accomplishment with regard to its goals. This study examines the utility of GAE and GFE from the perspective of the evaluation’s intended users. In the study, two evaluation teams, goal achievement and goal-free, independently and simultaneously evaluate the same human service program. Each team produced a final evaluation report, which was read by the evaluation’s users, who …

Advanced Placement Courses And College Student Success: Evidence From Bps: 96/01, Jinhai Zhang

Dissertations

The purpose of this study is, based on the application of Tinto's student persistence theory, to explore whether AP course taking, as one pre-collegiate student background characteristic, impacts college students' persistence, academic achievements, and college completion. This study used the national Beginning Postsecondary Study 96/01 longitudinal data set collected by the National Center of Education Statistics (NCES), which includes 12,100 first-time postsecondary beginners over a period of 6 academic years from 1995/96 to 2000/01.

In this study, students were categorized into three groups by their SAT scores. Logistical regression analysis indicated that overall students who took any AP course in …

Teaching Reading In The Secondary Content Area Classroom:Teacher Attitudes And Predictors, Sara L. Norton-Ejnik

Dissertations

Strategic teaching of reading occurs at the elementary level, and students are expected to "read to learn" once they enter high school. The majority of the nation's secondary students do not have all the requisite skills to read and learn from high school texts and materials, and even drop-out rates have been attributed to students' inability to keep pace with the literacy skills demanded by the secondary curriculum. No Child Left Behind legislation now mandates secondary school reading initiatives, from high stakes testing to remediation. Despite the national focus on secondary reading, teachers in America's secondary schools are not teaching …

Structural Characterization Of Water-Soluble Atmospheric Organic Matter By Ultrahigh-Resolution Mass Spectrometry, Jeffrey P. Leclair

Dissertations, Master's Theses and Master's Reports - Open

Isolated water-soluble analytes extracted from fog water collected during a radiation fog event near Fresno, CA were analyzed using collision induced dissociation and ultrahigh-resolution mass spectrometry. Tandem mass analysis was performed on scan ranges between 100-400 u to characterize the structures of nitrogen and/or sulfur containing species. CHNO, CHOS, and CHNOS compounds were targeted specifically because of the high number of oxygen atoms contained in their molecular formulas. The presence of 22 neutral losses corresponding to fragment ions was evaluated for each of the 1308 precursors. Priority neutral losses represent specific polar functional groups (H2O, CO2, CH3OH, HNO3, SO3, etc., …

Synthesis Of Chiral Ferrosalen Ligands And Their Applications In Asymmetric Catalysis, Xiang Zhang

Dissertations, Master's Theses and Master's Reports - Open

A new series of chiral ferrosalen ligands was designed and synthesized. The special feature of the ferrosalen ligands is that the chirality originated from the planar chiral ferrocenyl structure. For most known salen ligands, chirality comes from central and axial chiral centers. The key building block for the construction of these ferrosalen ligands was synthesized stereoselectively by a chiral auxiliary approach. This approach does not consume any chiral material, and does not require chiral HPLC resolution. Using this method, nine ligands were prepared using ferrocene as the starting material. In addition, the steric hindrance was modulated by changing the cyclopentadienyl …

Time-Domain Modeling Of High-Frequency Electromagnetic Wave Propagation, Overhead Wires, And Earth, Nils Markus Stenvig

Dissertations, Master's Theses and Master's Reports - Open

Prediction of radiated fields from transmission lines has not previously been studied from a panoptical power system perspective. The application of BPL technologies to overhead transmission lines would benefit greatly from an ability to simulate real power system environments, not limited to the transmission lines themselves. Presently circuitbased transmission line models used by EMTP-type programs utilize Carson’s formula for a waveguide parallel to an interface. This formula is not valid for calculations at high frequencies, considering effects of earth return currents.

This thesis explains the challenges of developing such improved models, explores an approach to combining circuit-based and electromagnetics modeling …

Multi-Software Modeling Technique For Field Distribution Propagation Through An Optical Vertical Interconnect Assembly, Matthew D. Howard

Dissertations, Master's Theses and Master's Reports - Open

Embedded siloxane polymer waveguides have shown promising results for use in optical backplanes. They exhibit high temperature stability, low optical absorption, and require common processing techniques. A challenging aspect of this technology is out-of-plane coupling of the waveguides. A multi-software approach to modeling an optical vertical interconnect (via) is proposed. This approach utilizes the beam propagation method to generate varied modal field distribution structures which are then propagated through a via model using the angular spectrum propagation technique. Simulation results show average losses between 2.5 and 4.5 dB for different initial input conditions. Certain configurations show losses of less than …

Compressed Sensing Approach To Ultra-Wideband Receiver Design, Jodhbir Singh

Dissertations, Master's Theses and Master's Reports - Open

One of the scarcest resources in the wireless communication system is the limited frequency spectrum. Many wireless communication systems are hindered by the bandwidth limitation and are not able to provide high speed communication. However, Ultra-wideband (UWB) communication promises a high speed communication because of its very wide bandwidth of 7.5GHz (3.1GHz-10.6GHz). The unprecedented bandwidth promises many advantages for the 21st century wireless communication system.

However, UWB has many hardware challenges, such as a very high speed sampling rate requirement for analog to digital conversion, channel estimation, and implementation challenges. In this thesis, a new method is proposed using compressed …

Fading Pdf Of Free-Space Optical Communication System With Pointing Error, Rui Liao

Dissertations, Master's Theses and Master's Reports - Open

A free-space optical (FSO) laser communication system with perfect fast-tracking experiences random power fading due to atmospheric turbulence. For a FSO communication system without fast-tracking or with imperfect fast-tracking, the fading probability density function (pdf) is also affected by the pointing error. In this thesis, the overall fading pdfs of FSO communication system with pointing errors are calculated using an analytical method based on the fast-tracked on-axis and off-axis fading pdfs and the fast-tracked beam profile of a turbulence channel. The overall fading pdf is firstly studied for the FSO communication system with collimated laser beam. Large-scale numerical wave-optics simulations …

Direction Finding In The Presence Of A More Realistic Environment Model, Irfan Ahmed

Dissertations, Master's Theses and Master's Reports - Open

Direction-of-arrival (DOA) estimation is susceptible to errors introduced by the presence of real-ground and resonant size scatterers in the vicinity of the antenna array. To compensate for these errors pre-calibration and auto-calibration techniques are presented. The effects of real-ground constituent parameters on the mutual coupling (MC) of wire type antenna arrays for DOA estimation are investigated. This is accomplished by pre-calibration of the antenna array over the real-ground using the finite element method (FEM). The mutual impedance matrix is pre-estimated and used to remove the perturbations in the received terminal voltage. The unperturbed terminal voltage is incorporated in MUSIC algorithm …

Quantum Transport In A Single Molecular Junction, Partha Pratim Pal

Dissertations, Master's Theses and Master's Reports - Open

The craze for faster and smaller electronic devices has never gone down and this has always kept researchers on their toes. Following Moore’s law, which states that the number of transistors in a single chip will double in every 18 months, today “30 million transistors can fit into the head of a 1.5 mm diameter pin”. But this miniaturization cannot continue indefinitely due to the ‘quantum leakage’ limit in the thickness of the insulating layer between the gate electrode and the current carrying channel. To bypass this limitation, scientists came up with the idea of using vastly available organic molecules …

Planar Magneto-Photonic And Gradient-Photonic Structures : Crystals And Metamaterials., Zhuoyuan Wu

Dissertations, Master's Theses and Master's Reports - Open

In the field of photonics, two new types of material structures, photonic crystals and metamaterials, are presently of great interest. Both are studied in the present work, which focus on planar magnetic materials in the former and planar gradient metamaterials in the latter. These planar periodic structures are easy to handle and integrate into optical systems. The applications are promising field for future optical telecommunication systems and give rise to new optical, microwave and radio technologies.

The photonic crystal part emphasizes the utilization of magnetic material based photonic crystals due to its remarkable magneto-optical characteristics. Bandgaps tuning by magnetic field …

Warming Alters Photosynthetic Rates Of Sub-Boreal Peatland Vegetation, Arvo Aljaste

Dissertations, Master's Theses and Master's Reports - Open

Boreal peatlands are important in the global carbon cycle. Despite covering only 3% of the global land area, peatlands store approximately one third of all soil carbon. Temperature is one of the major drivers in peatland carbon cycling as it affects both plant production and CO₂ fluxes from soils. However, it is relatively unknown how boreal peatland plant photosynthesis is affected by higher temperatures. Therefore, we measured plant photosynthetic rates under two different warming treatments in a poor fen in Northern Michigan. Eighteen plots were established that were divided into three treatments: control, open-top chamber (OTC) warming and infrared …

Study Of Accelerometer Assisted Single Key Positioning User Input Systems, Chunming Gao

Dissertations, Master's Theses and Master's Reports - Open

New designs of user input systems have resulted from the developing technologies and specialized user demands. Conventional keyboard and mouse input devices still dominate the input speed, but other input mechanisms are demanded in special application scenarios. Touch screen and stylus input methods have been widely adopted by PDAs and smartphones. Reduced keypads are necessary for mobile phones. A new design trend is exploring the design space in applications requiring single-handed input, even with eyes-free on small mobile devices. This requires as few keys on the input device to make it feasible to operate. But representing many characters with fewer …

Applications Of Finite Geometries To Designs And Codes, David C. Clark

Dissertations, Master's Theses and Master's Reports - Open

This dissertation concerns the intersection of three areas of discrete mathematics: finite geometries, design theory, and coding theory. The central theme is the power of finite geometry designs, which are constructed from the points and t-dimensional subspaces of a projective or affine geometry. We use these designs to construct and analyze combinatorial objects which inherit their best properties from these geometric structures.

A central question in the study of finite geometry designs is Hamada’s conjecture, which proposes that finite geometry designs are the unique designs with minimum p-rank among all designs with the same parameters. In this dissertation, we will …

Preserving And Interpreting The Mining Company Office : Landscape, Space And Technological Change In The Management Of The Copper Industry, Renee M. Blackburn

Dissertations, Master's Theses and Master's Reports - Open

The purpose of this research is to examine the role of the mining company office in the management of the copper industry in Michigan’s Keweenaw Peninsula between 1901 and 1946. Two of the largest and most influential companies were examined – the Calumet & Hecla Mining Company and the Quincy Mining Company. Both companies operated for more than forty years under general managers who were arguably the most influential people in the management of each company. James MacNaughton, general manager at Calumet and Hecla, worked from 1901 through 1941; Charles Lawton, general manager at Quincy Mining Company, worked from 1905 …

Using Water Balance Models To Approximate The Effects Of Climate Change On Spring Catchment Discharge : Mt. Hanang, Tanzania , Randall E. Fish

Dissertations, Master's Theses and Master's Reports - Open

This project addresses the potential impacts of changing climate on dry-season water storage and discharge from a small, mountain catchment in Tanzania. Villagers and water managers around the catchment have experienced worsening water scarcity and attribute it to increasing population and demand, but very little has been done to understand the physical characteristics and hydrological behavior of the spring catchment. The physical nature of the aquifer was characterized and water balance models were calibrated to discharge observations so as to be able to explore relative changes in aquifer storage resulting from climate changes.

To characterize the shallow aquifer supplying water …

"The Need Obliged Us" : Culture As Capacity During The Hurricane Stan Emergency Response. A Case Study From Tectitan, Huehuetenango, Guatemala , Jesse Silverman

Dissertations, Master's Theses and Master's Reports - Open

A major deficiency in disaster management plans is the assumption that pre-disaster civil-society does not have the capacity to respond effectively during crises. Following from this assumption a dominant emergency management strategy is to replace weak civil-society organizations with specialized disaster organizations that are often either military or Para-military and seek to centralize decision-making. Many criticisms have been made of this approach, but few specifically addresses disasters in the developing world. Disasters in the developing world present unique problems not seen in the developed world because they often occur in the context of compromised governments, and marginalized populations. In this …

Probe Studies Of A Hall Thruster At Low Voltages, Jerry L. Ross

Dissertations, Master's Theses and Master's Reports - Open

No abstract provided.

Post Processing Of Multiple Gps Receivers To Enhance Baseline Accuracy, Eddy H. Trinklein

Dissertations, Master's Theses and Master's Reports - Open

Inexpensive, commercial available off-the-shelf (COTS) Global Positioning Receivers (GPS) have typical accuracy of ±3 meters when augmented by the Wide Areas Augmentation System (WAAS). There exist applications that require position measurements between two moving targets. The focus of this work is to explore the viability of using clusters of COTS GPS receivers for relative position measurements to improve their accuracy. An experimental study was performed using two clusters, each with five GPS receivers, with a fixed distance of 4.5 m between the clusters. Although the relative position was fixed, the entire system of ten GPS receivers was on a mobile …

Incorporating Environmental Engineering And Science Topics Into Elementary Education , Jessica G. Billings

Dissertations, Master's Theses and Master's Reports - Open

No abstract provided.

Comparison Of The Effects Of Inquiry-Based Cooperative Learning And Demonstrations In Science Education , John Asiala

Dissertations, Master's Theses and Master's Reports - Open

The reported research project involved studying how teaching science using demonstrations, inquiry-based cooperative learning groups, or a combination of the two methods affected sixth grade students’ understanding of air pressure and density. Three different groups of students were each taught the two units using different teaching methods. Group one learned about the topics through both demonstrations and inquirybased cooperative learning, whereas group two only viewed demonstrations, and group three only participated in inquiry-based learning in cooperative learning groups.

The study was designed to answer the following two questions:

1. Which teaching strategy works best for supporting student understanding of air …