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Numerical Modeling Of Inertial Flows In Proppant-Reservoir Rock Interfaces, Abdulla Alkaabi
Numerical Modeling Of Inertial Flows In Proppant-Reservoir Rock Interfaces, Abdulla Alkaabi
Graduate Theses, Dissertations, and Problem Reports (ETD)
Predicting accurate pressure drops in the reservoirs is essential for estimating the ultimate hydrocarbons recoveries and production rates. In hydraulically fractured wells, inertial flows can cause excessive pressure drops, beyond the predicted values form the Darcy equation. Therefore, predicting these excessive pressure drops through defining non-Darcy factors is of particular significance.;Excessive pressure drops in inertial flows are caused by acceleration/deceleration of fluids, which usually occur when fluids are moving from constricted areas to larger pores and vice versa. In the interface between the propped fracture and the reservoir rock, the pores in the latter are in connection with the former …
Application Of Neural Network-Support Vector Technique To Forecast U.S. Unemployment Rate, Azadeh Ansari
Application Of Neural Network-Support Vector Technique To Forecast U.S. Unemployment Rate, Azadeh Ansari
Graduate Theses, Dissertations, and Problem Reports (ETD)
This research utilized five economic factors; 1) Consumer Price Index, 2) Return on Treasury Securities, 3) Total Nonfarm payroll, 4) Jobless Claims Filed, and 5) Stand & Poor 500 index to predict US unemployment rate. Historical time series data was obtained from the Economic Research web site of the Federal Reserve Bank of St. Louis and other finance web site.;Multiple Linear Regression, Back Propagation Algorithm, and Support Vector Regression techniques were utilized to predict US unemployment rate. Based on Mean Squared Error and adjusted R2 values, the Support Vector Regression technique provided superior results for the given dataset. Future US …
Refined Computational Modeling Of Sofcs Degradation Due To Trace Impurities In Coal Syngas, Hayri Sezer
Refined Computational Modeling Of Sofcs Degradation Due To Trace Impurities In Coal Syngas, Hayri Sezer
Graduate Theses, Dissertations, and Problem Reports (ETD)
The Solid Oxide Fuel Cell (SOFC) is a good alternative for clean and efficient power generation. These cells can be operated directly on a wide variety of fuels including biogas, hydrocarbon fuels and synthesized coal gas (syngas), which is a promising avenue for utilization of coal with much less environmental impact. One of the challenges in this technology is poisoning of SOFC anodes by trace impurities contained in coal syngas. One such impurity, phosphine is known to cause catastrophic failure of SOFC anode even at <10ppm concentrations. Fuel impurity degradation patterns can vary by different operating conditions such as humidity, applied current, temperature and anode thickness.;In the present study, more detailed models are developed to predict the typical degradation behaviors observed in SOFC anode due to phosphine by extension of an in-house one-dimensional computational code. This model is first used to predict the effect of steam concentration on phosphine induced degradation in anode supported SOFCs. The model is refined based on the experimental observation, which indicate that the phosphine degradation is less severe in the absence of steam. Simulations results showed good agreement with experimental data. Then, a sensitivity analysis, using dual numbers automatic differentiation (DNAD) is performed to investigate the influence of empirical model parameters on model outputs, electrical potential, ohmic and polarization losses. Further, the refined one-dimensional model is extended to a three-dimensional model to study the phosphine induced performance degradation in relatively large planar cells operating on hydrogen fuel. The empirical model parameters are calibrated using button cell experiments and sensitivity analysis as a guide. These parameters are then used in planar cell simulations. The results from the three dimensional model show that the contaminant coverage of nickel and fuel distribution inside the anode is highly non-uniform. These non-uniform distributions are caused by the geometrical alignment of gas channels and current collectors, as well as the variation of gas concentration along the flow direction. The non-uniform deactivation of anode gave rise to the altering of current distribution inside the planar cell such that the cell can still produce current even when some regions of the anode are partially inactive. In addition, to assess the overall cell performance at any given degradation stage, additional simulations are performed to evaluate the electrochemical behavior (polarization and impedance) of the cell. The simulation results are assessed in comparison to experimental observation whenever possible. Finally, a physics based transport model for nickel migration is formulated based on experimentally observed elemental redistribution in a SOFC anode and it is integrated into refined one-dimensional phosphine degradation code. Simulations show that the proposed mechanism of Ni diffusion driven by secondary phase formation, the electrical force, and humidity can explain the experimentally observed accumulation of Ni and secondary phases on the SOFC anode surface.;Keywords: Keywords: Solid Oxide Fuel Cells, Contaminant Degradation, Automatic differentiation, Sensitivity Analysis, Impedance, Polarization, Nickel migration, Electro-migration..
Nano-Derived Sensors For High-Temperature Sensing Of H2, So2 And H2s, Engin Ciftyurek
Nano-Derived Sensors For High-Temperature Sensing Of H2, So2 And H2s, Engin Ciftyurek
Graduate Theses, Dissertations, and Problem Reports (ETD)
The emission of sulfur compounds from coal-fired power plants remains a significant concern for air quality. This environmental challenge must be overcome by controlling the emission of sulfur dioxide (SO2) and hydrogen sulfide (H2S) throughout the entire coal combustion process. One of the processes which could specifically benefit from robust, low cost, and high temperature compatible gas sensors is the coal gasification process which converts coal and/or biomass into syngas. Hydrogen (H2), carbon monoxide (CO) and sulfur compounds make up 33%, 43% and 2% of syngas, respectively. Therefore, development of a high temperature (>500°C) chemical sensor for in-situ monitoring …
Extent Of Hydraulic Fractures In A Multilayered Geologic Media, Carter L. Hulcher
Extent Of Hydraulic Fractures In A Multilayered Geologic Media, Carter L. Hulcher
Graduate Theses, Dissertations, and Problem Reports (ETD)
In this report, the vertical extent of hydraulic fractures in a layered geological formation was investigated. In reality, the geology of the earth is heterogeneous, and therefore fracture growth will be significantly different. Fracture growth was simulated by using numerical models with relevant geomechanical, fluid flow and proppant transport properties. Results show the horizontal stress gradient plays an important role in fracture propagation. Lower horizontal stress contrasts between layers allow for greater fracture propagation in the vertical direction. Higher fluid viscosities tend to increase the fracture height and width, while decreasing the fracture length. Several other geomechanical properties such as …
Influence Of Geochemical Processes On The Geomechanical Response Of The Overburden Due To Co2 Storage In Saline Aquifers, Sai Bharath Kumar Varre
Influence Of Geochemical Processes On The Geomechanical Response Of The Overburden Due To Co2 Storage In Saline Aquifers, Sai Bharath Kumar Varre
Graduate Theses, Dissertations, and Problem Reports (ETD)
Saline aquifers have been identified as desirable geologic formations, suitable for the storage of carbon dioxide (CO2) in large amounts. While the impermeable caprock layer(s) in the overburden provide(s) the primary trap for injected carbon dioxide, other trapping mechanisms, such as solubility, residual, ionic or mineral trapping, help contribute to CO2 storage. Geochemical reactions alter the petrophysical properties such as porosity in the target reservoir, and may have an influence on the reservoir storage capacity. When CO2 is injected for long periods of time, it changes the fluid pressures and the overburden geomechanical response. The geomechanical response associated with time-dependent …
On The Optimization Of Co2-Eor Process Using Surrogate Reservoir Model, Vida Gholami
On The Optimization Of Co2-Eor Process Using Surrogate Reservoir Model, Vida Gholami
Graduate Theses, Dissertations, and Problem Reports (ETD)
CO2-EOR projects are becoming increasingly popular. Since enhanced recovery processes are applied to the mature fields, it usually involves a large number of wells. While the large number of wells leads to a better geological model, it results in very large flow models that are hard to manage, history match, and use as an optimization base. Nevertheless, injection-production optimization remains the core of all modeling efforts in CO2-EOR projects.;The objective of this work is to investigate the feasibility of using state-of-the-art data-driven proxy models to facilitate injection-production optimization in a CO2-EOR process. The use of coupled grid-based---SRM G and well-based---SRMW …
The Political Economy Of Pork-Barrel Spending, J. Zachary Klingensmith
The Political Economy Of Pork-Barrel Spending, J. Zachary Klingensmith
Graduate Theses, Dissertations, and Problem Reports (ETD)
This dissertation consists of five papers which examine the impact pork-barrel spending has on legislative decision-making. In chapter 1, I introduce the theory behind pork-barrel spending, legislative coalitions and other similar topics. In chapter 2, I determine if pork-barrel spending has any impact on state employment levels. I use both a spatial and non-spatial modeling methodology to answer the question. Chapter 3 examines the relationship between the amount of pork-barrel spending appropriated by the Senator and the amount of money the Senator is able to fundraise. Chapter 4 integrates the results from chapter 3 to develop two-stage and three-stage models …
Influence Of Annealing Temperature On The Mechanical Properties Of Sol-Gel Zno Films, Kyle J. Burrows
Influence Of Annealing Temperature On The Mechanical Properties Of Sol-Gel Zno Films, Kyle J. Burrows
Graduate Theses, Dissertations, and Problem Reports (ETD)
Transparent conducting oxides (TCO's) are widely adopted coatings applied to a wide range of applications including; optoelectronics, touch-screens, smart systems, organic light emitting diodes (OLED's), and solar panel technologies. During both fabrication and service, the mechanical reliability of these coatings, such as wear and scratch resistance, is of great importance. Zinc Oxide (ZnO) coatings have emerged as a highly desirable, and low cost alternative to the commonly adopted Indium Tin Oxide (ITO) since they offer; wide band gap energy (3.34eV), high optical transmission, and are both chemically and thermally stable.;In this work, the mechanical properties of sol-gel ZnO films deposited …
Advanced Doc-Dpf Model To Predict Soot Accumulation And Pressure Drop In Diesel Particulate Filters, Alessandro Cozzolini
Advanced Doc-Dpf Model To Predict Soot Accumulation And Pressure Drop In Diesel Particulate Filters, Alessandro Cozzolini
Graduate Theses, Dissertations, and Problem Reports (ETD)
Diesel Particulate Filters (DPFs) are regarded as the most effective technology to reduce particulate matter (PM) emissions from modern diesel engines. PM mass collected inside the filter needs to be periodically oxidized to clean the porous walls in order to avoid excessive backpressure that could negatively affect engine and turbocharger performances leading to higher fuel consumption. Diesel Oxidation Catalysts (DOCs), on the other hand, represent an effective means to reduce hydrocarbon (HC) emissions and set the proper chemical conditions at the inlet of the DPF to enhance soot oxidation during filter regeneration. Due to the impact that these devices have …
Transforming Traditional Classrooms Into Student-Centered 21 St Century Classrooms: A Developmental Process For Professional Development, Monica Mccartney
Transforming Traditional Classrooms Into Student-Centered 21 St Century Classrooms: A Developmental Process For Professional Development, Monica Mccartney
Graduate Theses, Dissertations, and Problem Reports (ETD)
This design-based action research study utilized a model of design, implementation, and evaluation across four school semesters to improve the professional development provided to teachers in a new one-to-one computing environment. Data sources collected across all semesters helped guide changes to the design and implementation phases of the professional development. This study had one guiding research question: What are the appropriate professional development sessions and process for designing professional development in order to meet the needs of teachers as they to transform traditional classrooms into student-centered 21 st century classrooms?
A Method Of Pricing European Style Equity Options, David Harris
A Method Of Pricing European Style Equity Options, David Harris
Graduate Theses, Dissertations, and Problem Reports (ETD)
The study of option pricing has a very short history, when compared with other elements of economics. Since the publication of a method to price European style equity options by Fischer Black and Myron Scholes in 1973 a vast amount of research on option pricing has occurred. Ultimately, the pricing of equity options depends upon the match of the model and reality. A new method to price option contracts is proposed. It is argued that the distributional assumptions of standard models are uncorrelated with nature. A new model is proposed as a start to a new class of models.
Tender Evaluation For The Telecommunication Industry Using The Analytic Network Process, Ali Kalanaki
Tender Evaluation For The Telecommunication Industry Using The Analytic Network Process, Ali Kalanaki
Graduate Theses, Dissertations, and Problem Reports (ETD)
In the past few decades, tender evaluation has consistently dominated most of organizations' top strategic priorities. Additionally, the field of tender evaluation has generated a vast amount of research efforts, wherein most of these efforts center on methods enabling consideration of all affecting criteria together to make an appropriate decision. Despite the great deal of advances in the methods of tender evaluation based on technical view, there still lacks comprehensive and organizational-driven decision making tools to support organizations during the crucial task of choosing a suitable tender that best meets their business and technical needs.;Tender evaluation has a strategic role …
Liquid Chromatography -- Tandem Mass Spectrometry Techniques For Drugs Of Abuse As Applied To Bacterial And Forensic Toxicology, Stephanie Marie Martindale
Liquid Chromatography -- Tandem Mass Spectrometry Techniques For Drugs Of Abuse As Applied To Bacterial And Forensic Toxicology, Stephanie Marie Martindale
Graduate Theses, Dissertations, and Problem Reports (ETD)
The ability of bacterial species to transform complex chemical substances has been well documented. Some of these species are native to the human gastrointestinal tract and play an active role in the postmortem decomposition process. These species have potential to cause biotransformations that affect compound-to-metabolite ratios within the human body, especially after death. Postmortem changes such as these have rarely been evaluated or taken into consideration but they have potential to supply valuable information, especially concerning compound identification and confirmation.;The purpose of this research was to investigate the effects of Escherichia coli, Bacteroides fragilis, and Clostridium perfringens on drugs of …
Science Teaching Efficacy Beliefs And The Lived Experience Of Preservice Elementary Teachers, Karen A. Kettler
Science Teaching Efficacy Beliefs And The Lived Experience Of Preservice Elementary Teachers, Karen A. Kettler
Graduate Theses, Dissertations, and Problem Reports (ETD)
The current study utilized a mixed methods approach to examine the science teaching efficacy beliefs (STEB) of preservice elementary teachers as they participated in a Science Methods course. The following questions were addressed using quantitative survey data and qualitative interviews: What are the STEB of preservice elementary teachers as they progress through a Science Methods course?; How do the STEB of preservice elementary teachers with higher and lower personal science teaching efficacy (PSTE) beliefs change as they progress through a Science Methods course?; What is the nature of the lived experiences of preservice elementary teachers with higher and lower PSTE …
The Impact Of Service Learning On Leadership Skills Of Students Who Are Gifted And Talented In The Middle School, Patricia Anne Coon
The Impact Of Service Learning On Leadership Skills Of Students Who Are Gifted And Talented In The Middle School, Patricia Anne Coon
Graduate Theses, Dissertations, and Problem Reports (ETD)
This investigation relates to the impact of service learning on leadership skills of students who are gifted in the middle school while the students plan the project in-school and execute their goals out-of-school for their yearlong service learning project called Community Problem-Solving, or CmPS. Based on surveys, observations, and interviews from 25 students identified as gifted in the middle school, this study describes the student responses and observations from the researcher and teacher of the gifted. Findings show that most of the students in the study felt that their yearlong service learning project positively impacted their leadership skills. The data …
Continuities On Subspaces, Timothy James Glatzer
Continuities On Subspaces, Timothy James Glatzer
Graduate Theses, Dissertations, and Problem Reports (ETD)
We define a generalized continuity by declaring that for any family S of subsets of a topological space X, a function f : X → Y is S -continuous if for each S∈ S , the function f ↾ S : S → Y is continuous. This is easily seen to generalize such well known concepts as separate continuity and linear continuity. Using this definition as a way to unify several disparate results, we attempt to create a theory of S -continuity. As a part of this program, we give constructions for S -continuous functions for several natural classes S …
A Versatile Method Of Resolution Enhancement For Tactile Sensor Array Used As Synthetic Skin: Modeling And Implementation, Karen Flores De Jesus
A Versatile Method Of Resolution Enhancement For Tactile Sensor Array Used As Synthetic Skin: Modeling And Implementation, Karen Flores De Jesus
Graduate Theses, Dissertations, and Problem Reports (ETD)
Tactile sensors are one of the major devices that enable robotic systems to interact with the surrounding environment. In particular, modern assistive robotic systems need to carry out many human-like activities. Thus, it is desired to have sensor arrays that can acquire different environmental information just like human skin. In the past two decades, various types of tactile sensor arrays have been developed to acquire different physical properties, such as temperature, force, and geometric shapes. However, though the measurement of a single sensor can be accurate, the planar resolution is limited due to fabrication difficulties. This research aims to propose …
A Correlational Study To Evaluate The Effectiveness Of Behavior-Based Safety In An Offshore Oil Production Facility, Zinga Martine Branco
A Correlational Study To Evaluate The Effectiveness Of Behavior-Based Safety In An Offshore Oil Production Facility, Zinga Martine Branco
Graduate Theses, Dissertations, and Problem Reports (ETD)
For many countries, oil production constitutes a large part of their economic resources. It is also one of the most hazardous activities with high incident rates. Workplace safety has remained a challenge for these industries which strive to operate injury free. Behavior-Based Safety (BBS) is used as a safety intervention approach to minimize the frequency and severity of workplace incidents and injuries. Many companies assume BBS is effective in reducing injuries and losses. However, only anecdotal evidence is usually presented to support the effectiveness of BBS in decreasing incident rates.;This study explores the relationship between Behavior-Based Safety (BBS) outcomes and …
Using A Three-Dimensional Model To Understand Age Differences In The Framing Effect, Tara E. Karns
Using A Three-Dimensional Model To Understand Age Differences In The Framing Effect, Tara E. Karns
Graduate Theses, Dissertations, and Problem Reports (ETD)
The present study used a between-subjects design with three instruction conditions to investigate susceptibility to the framing effect among younger, middle-aged, and older adults. Participants were instructed to pay attention to the facts and numbers, to use their gut feelings, or to use their previous experiences to respond to two decision-making scenarios pertaining to treatment for lung cancer and a vaccination for a flu virus. Results revealed that, overall, the framing effect was present in the lung cancer scenario, but not the flu scenario. Instruction condition and age did not affect susceptibility to the framing effect; however, a frame by …
Aerodynamic Parameter Identification Of A Venus Lander, Robert A. Sykes
Aerodynamic Parameter Identification Of A Venus Lander, Robert A. Sykes
Graduate Theses, Dissertations, and Problem Reports (ETD)
An analysis was conducted to identify the parameters of an aerodynamic model for a Venus lander based on experimental free-flight data. The experimental free-flight data were collected in the NASA Langley 20-ft Vertical Spin Tunnel with a 25-percent Froude-scaled model. The experimental data were classified based on the wind tunnel run type: runs where the lander model was unperturbed over the course of the run, and runs were the model was perturbed (principally in pitch, yaw, and roll) by the wind tunnel operator. The perturbations allow for data to be obtained at higher wind angles and rotation rates than those …
Techniques For Ocular Biometric Recognition Under Non-Ideal Conditions, Raghavender Reddy Jillela
Techniques For Ocular Biometric Recognition Under Non-Ideal Conditions, Raghavender Reddy Jillela
Graduate Theses, Dissertations, and Problem Reports (ETD)
The use of the ocular region as a biometric cue has gained considerable traction due to recent advances in automated iris recognition. However, a multitude of factors can negatively impact ocular recognition performance under unconstrained conditions (e.g., non-uniform illumination, occlusions, motion blur, image resolution, etc.). This dissertation develops techniques to perform iris and ocular recognition under challenging conditions. The first contribution is an image-level fusion scheme to improve iris recognition performance in low-resolution videos. Information fusion is facilitated by the use of Principal Components Transform (PCT), thereby requiring modest computational efforts. The proposed approach provides improved recognition accuracy when low-resolution …
Analyzing The Impact Of Wireless Multi-Hop Networking On Vehicular Safety, Rudhir Upretee
Analyzing The Impact Of Wireless Multi-Hop Networking On Vehicular Safety, Rudhir Upretee
Graduate Theses, Dissertations, and Problem Reports (ETD)
One of the core challenges of Intelligent Transportation System is the dissemination of timely and accurate vehicle information (e.g. speed, position) to geographically large distances without compromising data supply rates from immediate neighbors. This feature is critical for the design of vehicle safety and navigation applications. Single hop broadcasting is often inadequate to ensure vehicle safety when the platoon size is arbitrarily large due to its upper bound on rate and range of wireless message transmission. Existing wireless multi-hop protocols do not ensure reliable message delivery while avoiding network congestion in the shared channel. In this thesis, we make two …
Calibrating The Lamodel Program For Shallow Cover Multiple-Seam Mines, Morgan M. Sears
Calibrating The Lamodel Program For Shallow Cover Multiple-Seam Mines, Morgan M. Sears
Graduate Theses, Dissertations, and Problem Reports (ETD)
Stable underground mine openings are fundamental to ensuring the safety of miners and providing a safe work environment. During the past decade, approximately 40% of underground mining fatalities were caused by roof falls, rib collapses, or bumps/bursts, 19% of which occurred during retreat mining (Pappas and Mark, 2012). In addition, approximately 600 miners are non-fatally injured (often severely) every year by rock falls in coal mines (Pappas and Mark, 2012).;To help with designing stable mine pillars in deep-cover situations, a new calibration method for deep-cover pillar retreat mining was developed and implemented into the LaModel 3.0 program a few years …
Stressors And Coping Behaviors Of Female Peer Leaders Participating In College Club Sports, Leigh A. Bryant
Stressors And Coping Behaviors Of Female Peer Leaders Participating In College Club Sports, Leigh A. Bryant
Graduate Theses, Dissertations, and Problem Reports (ETD)
Peer leadership positions on collegiate club sport teams can be valuable opportunities for students to develop leadership skills, maintain healthy habits, create friendships, and foster organizational and personal connections across the university setting. Nevertheless, involvement in club sports can create stress over and above the many stressors that college students may encounter during their undergraduate experience. This study focused on exploring female leaders' perceived stressors inside and outside of the sport setting, and the ways in which they coped with them. Participants ( N = 7) were interviewed based on nominations from their respective teammates. Interviews were conducted using a …
Robust Cross-Dock Location Model Accounting For Demand Uncertainty, Stephanie Spangler
Robust Cross-Dock Location Model Accounting For Demand Uncertainty, Stephanie Spangler
Graduate Theses, Dissertations, and Problem Reports (ETD)
The objective of this thesis was to develop optimization models to locate cross-docks in supply chain networks. Cross-docks are a type of intermediate facility which aid in the consolidation of shipments, in which the goods spend little or no time in storage. Instead, the goods are quickly and efficiently moved from the inbound trucks to the outbound docks. Two deterministic facility location models were developed. One followed the p-median facility problem type, where only p facilities were opened in order to minimize total network costs. In the second model, as many cross-docks as necessary were opened and facility location costs …
Using Bio-Chars As Potential Catalysts For Upgrading Wood Pyrolysis Vapors, Wenjia Jin
Using Bio-Chars As Potential Catalysts For Upgrading Wood Pyrolysis Vapors, Wenjia Jin
Graduate Theses, Dissertations, and Problem Reports (ETD)
Pyrolysis is a promising thermochemical conversion method to process lignocellulosic biomass to produce bio-oil that can be further refined into chemicals and fuels compatible with current petrochemical fuels. However, bio-oils are highly reactive and unstable and therefore must be refined immediately, thereby reducing process sustainability. Catalytic modifications of pyrolysis vapors have been researched to improve bio-oil stability. However, using traditional highly active petroleum refining cracking catalysts for catalytic pyrolysis has shown some negative results, for example, increasing bio-oil moisture content and reducing its calorific value. Therefore, this project aims at understanding decomposition behavior of wood components, its chemical constituent polymers …
The Political Economy Of U.S. Public Pension Plans And Their Unfunded Liabilities, Dashle Gunn Kelley
The Political Economy Of U.S. Public Pension Plans And Their Unfunded Liabilities, Dashle Gunn Kelley
Graduate Theses, Dissertations, and Problem Reports (ETD)
Chapter 1 applies a public choice approach to the problem of unfunded pension liabilities and adopts the methodology of Congleton and Shughart (1990) to model underfunding of state-level public pension plans using the median voter theorem, along with the theory of "capture" by special interest groups, and a combined model of the two. With panel data from 2001 to 2009, the paper finds that the combined model provides the strongest explanation for the current levels of unfunded liabilities; hence, both median voter preferences and special interest group influence are affecting political outcomes. The special interest group model slightly outperforms the …
Response To Intervention Implementation: The Successes And Challenges In The Mid Appalachian Counties, Tammy J. Samples
Response To Intervention Implementation: The Successes And Challenges In The Mid Appalachian Counties, Tammy J. Samples
Graduate Theses, Dissertations, and Problem Reports (ETD)
Education reform has been on a new path over the last 15 years; a path that leads to more accountability, more choice for students and parents, highly qualified teachers, as well as, best practices in instruction. In an effort to move along the path of reform and as a result of previous reform, the 2004 reauthorization of IDEA reviewed the field of literacy instruction and disability determination.;They found that the Intelligence Quotient (IQ) discrepancy model was problematic and often put students in a position of waiting to fail due to the fact that placement often did not occur until students …
Quantification Of Acid Loads And Delineation Of Hydrochemical Facies At A Phreatic Mine Spoil Aquifer, Mitchell A. Mcadoo
Quantification Of Acid Loads And Delineation Of Hydrochemical Facies At A Phreatic Mine Spoil Aquifer, Mitchell A. Mcadoo
Graduate Theses, Dissertations, and Problem Reports (ETD)
Acid mine drainage geochemistry and in situ alkaline injection were investigated at the DLM coal mine, Alton West Virginia. These included spatial and temporal investigations into hydrochemical controls that were initiated with reclamation efforts. Approaches included the delineation of hydrochemical facies and analysis of time series data to develop a methodology for estimating acid loads.;Results of agglomerative hierarchical clustering were mapped to demonstrate spatial variations in response to reclamation efforts over time. Spatial patterns were determined and indicate that aquifer chemistry continued to evolve during the study period. Results confirmed that injection of alkalinity into the aquifer effected acid producing …