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Effects Of Nickel-Aluminum-Beta Precipitates On Crack Growth Behavior In Inconel Alloy 783., Longzhou Ma Jan 2001

Effects Of Nickel-Aluminum-Beta Precipitates On Crack Growth Behavior In Inconel Alloy 783., Longzhou Ma

Graduate Theses, Dissertations, and Problem Reports (ETD)

Recently developed γ-γ′-β three phases governing INCONEL* alloy 783 is the result of an extensive superalloy development program aimed at improving environmental-induced intergranular cracking resistance. Formation of intermetallic nickel aluminide β phase in alloy 783 is essentially resistant for the general oxidation. In this study, commercial alloy 783 was subjected to various metallurgical processing including heat treatments with β aging/without β aging, addition of 3% Cr into alloy, and thermo-mechanical processing (TMP). The corresponding microstructures were evaluated by means of the optical microcopy, SEM and TEM. These processed materials were subjected to the fatigue crack growth and sustained loading crack …

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An Investigation Of The Relationship Between Saudi Teachers' Curriculum Perspectives And Their Preference Of Curriculum Development Models., Mansour A. Bin Salamah Jan 2001

An Investigation Of The Relationship Between Saudi Teachers' Curriculum Perspectives And Their Preference Of Curriculum Development Models., Mansour A. Bin Salamah

Graduate Theses, Dissertations, and Problem Reports (ETD)

The purpose of this study was to investigate the relationship between Saudi teachers' curriculum perspectives and their preference of curriculum development models. The sample of the study consisted of science, math, and social studies teachers who taught in elementary, middle, and secondary schools in the Riyadh District of Saudi Arabia. The data were randomly collected from 423 teachers by utilizing a questionnaire. The questionnaire was composed of three parts. The participants were asked to determine their preference of the three curriculum perspectives and the three curriculum development models that were based on: Essentialism-Behaviorism, Pragmatism-Cognitivism, and Existentialism-Humanism. Frequencies, percentages, and means …

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A Study Of The Relationship Between Characteristics Of Faculty Members In West Virginia Colleges And Their Level Of Implementation Of Information Technology., Andrew Neale Blackwood Jan 2001

A Study Of The Relationship Between Characteristics Of Faculty Members In West Virginia Colleges And Their Level Of Implementation Of Information Technology., Andrew Neale Blackwood

Graduate Theses, Dissertations, and Problem Reports (ETD)

This study examined the relationships between characteristics of faculty members in West Virginia colleges and their level of information technology (IT) implementation. A one-shot case study research design was used to investigate the connection between the faculty members' gender, age, years of experience, academic discipline, rank, amount of computer education, computer access, Internet access, job satisfaction, and their level of IT implementation. The specially designed Computer Usage Survey was mailed to a randomly selected sample of 95 faculty members; responses were received from 64 (67%) faculty members. Data analysis identified statistically significant relationships between the faculty members' gender, years of …

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Alternative Education In West Virginia: Perceptions Of Programs, Leadership And Success., Tammy Kay Brock-Fowler Jan 2001

Alternative Education In West Virginia: Perceptions Of Programs, Leadership And Success., Tammy Kay Brock-Fowler

Graduate Theses, Dissertations, and Problem Reports (ETD)

More and more students are being labeled at-risk in our educational system. These students are often behind academically, have dropped out of school, or have been suspended or expelled from conventional high schools. In West Virginia in 1995, 4,008 students did not complete high school (West Virginia University Survey Research Center, 1977). Alternative schools or programs are a direct result of a need to provide options to students who cannot be accommodated by conventional public schools. Alternative Education Program in West Virginia is defined as an authorized departure from the regular school program designed to provide educational and social development …

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Teachers' Conceptions Of The Nature Of Science: Analyzing The Impact Of A Teacher Enhancement Program In Changing Attitudes And Perceptions Of Science And Scientific Research., Aimee Lee Govett Jan 2001

Teachers' Conceptions Of The Nature Of Science: Analyzing The Impact Of A Teacher Enhancement Program In Changing Attitudes And Perceptions Of Science And Scientific Research., Aimee Lee Govett

Graduate Theses, Dissertations, and Problem Reports (ETD)

The purpose of this study was to determine the efficacy of a residential science research experience in changing participants' attitudes and understanding of the nature of science and their view of themselves as science researchers. Data from interviews, journal writings, classroom observations and two pre-post instruments were used in the evaluation plan. As participants of this study, 16 inservice teachers (K–16) attended a two-week residential institute at the National Radio Astronomy Observatory (NRAO) in Green Bank, West Virginia. The format of the institute featured a scientific research experience designed to arm its participants with the skills needed to model their …

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An Assessment Of The English-Language Needs Of Second-Year Thai Undergraduate Engineering Students In A Thai Public University In Thailand In Relation To The Second-Year Eap Program In Engineering., Patama Kittidhaworn Jan 2001

An Assessment Of The English-Language Needs Of Second-Year Thai Undergraduate Engineering Students In A Thai Public University In Thailand In Relation To The Second-Year Eap Program In Engineering., Patama Kittidhaworn

Graduate Theses, Dissertations, and Problem Reports (ETD)

This study was to investigate the English-language needs of 182 second-year Thai undergraduate engineering students in a Thai public university in Thailand for their study in their second-year English program in engineering. A two-part self-assessment questionnaire was constructed based upon the previous research on the English-language needs of English as a Second Language (ESL)/English as a Foreign Language (EFL) students, particularly in Science and Technology in relation to English for Academic Purposes (EAP). The first part of the questionnaire asks for their demographic variables: gender, specialty, years of studying English in the school(s), and self-reported English proficiency in Listening, Speaking, …

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Essential Oil Treatments To Control Varroa Destructor Anderson And Trueman 2000 (Formerly Varroa Jacobsoni Oudemans 1904) (Mesostigmata: Varroidae), Maria Mercedes Vargas-Sarmiento Dec 2000

Essential Oil Treatments To Control Varroa Destructor Anderson And Trueman 2000 (Formerly Varroa Jacobsoni Oudemans 1904) (Mesostigmata: Varroidae), Maria Mercedes Vargas-Sarmiento

Graduate Theses, Dissertations, and Problem Reports (ETD)

Varroa destructor Anderson and Trueman is the most serious pest of the honey bee Apis mellifera L. Varroa mites transmit several viruses, bacteria and fungi to the bees, which results in a condition called parasitic mite syndrome. There are no completely reliable treatments available to control the mite. Fifty-one beehives were artificially infested with varroa mites by using three different methods. Observations on mite population growth during three infestation attempts were made. All colonies were inspected for the presence of the small hive beetle, Aethina tumida Murray, no beetles were found. Thirty-five colonies were used to establish the efficacy of …

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Mapping Appalachia, Jennifer Hall Boggess Dec 2000

Mapping Appalachia, Jennifer Hall Boggess

Graduate Theses, Dissertations, and Problem Reports (ETD)

The complexities of natural and human events that make up the history of a place also create components of its image. Images, even those that are meant to describe limited, specific information, often reveal more than that which they were designed to tell. The maps that have been used in conjunction with traditional notions of landscape painting suggest that there is no single way to understand a place. They also hint of something ineffable but true emerging from their forms. The history of movement of people and natural forces, the arriving and leaving of individuals and cultures change the landscape. …

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Restimulation Candidate Selection Using Virtual Intelligence, Khalid Y. Mohamad Dec 2000

Restimulation Candidate Selection Using Virtual Intelligence, Khalid Y. Mohamad

Graduate Theses, Dissertations, and Problem Reports (ETD)

Due to the importance of well deliverability maintenance, a committee of specialists from Dominion East Ohio and other service companies meets every year to select the wells to be included in the deliverability maintenance plan. The application tool not only help in selecting the wells for deliverability maintenance plan but goes beyond that by designing the most optimum frac recipe.;The purpose of this study is to develop an engineering tool that will help petroleum engineers making a better decision for selecting well candidate and design well restimulation. The project focuses on a gas storage field and use data such as …

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Improving The Simulation Of A Waterflooding Recovery Process Using Artificial Neural Networks, Edison Gil Dec 2000

Improving The Simulation Of A Waterflooding Recovery Process Using Artificial Neural Networks, Edison Gil

Graduate Theses, Dissertations, and Problem Reports (ETD)

The waterflood performance of the dual five-spot pilot project in the Stringtown oil field, situated in West Virginia, has been studied. A numerical simulator, called BOAST98, was used for the simulation purposes, after developing a reservoir description.;The producing horizon in the field is the Upper Devonian Gordon sandstone, which is characterized by severe heterogeneity due to the depositional environment. Using available core and log data and geological analysis, a reservoir characterization study was done. A preliminary reservoir description based on log porosity-core permeability correlation was improved by developing Artificial Neural Networks (A.N.N.), which incorporates geophysical well log information. These A.N.N.'s …

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Evaluation Of Opacity, Particulate Matter, And Carbon Monoxide From Heavy-Duty Diesel Transient Chassis Tests, Ronald Page Jarrett Dec 2000

Evaluation Of Opacity, Particulate Matter, And Carbon Monoxide From Heavy-Duty Diesel Transient Chassis Tests, Ronald Page Jarrett

Graduate Theses, Dissertations, and Problem Reports (ETD)

Opacity and emission data were collected from heavy-duty diesel engines exercised through snap-acceleration tests and transient chassis dynamometer tests. Emission data were gathered using the West Virginia University (WVU) Transportable Heavy Duty Vehicle Emission Testing Laboratories (THDVETL) and opacity data were collected from two opacity meters; the Wager 650CP full flow opacity meter and the Bosch RT 100 partial flow opacimeter. Results showed that the Bosch peak opacity readings were consistently higher than the Wager peak opacity readings, and both meters showed little correlation with filter-captured particulate matter (PM). It was also observed that the snap-acceleration test did not identify …

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Three-Dimensional Image Reconstruction Of Skeletal Tissue From Computed Tomography, Sundareswar Bangalore Jayashekar Dec 2000

Three-Dimensional Image Reconstruction Of Skeletal Tissue From Computed Tomography, Sundareswar Bangalore Jayashekar

Graduate Theses, Dissertations, and Problem Reports (ETD)

Edge Detection Techniques play a very important role in medical imaging. Pre-operative diagnosis of diseases such as cancer, tumors, bone fractures etc. depend on edge detection techniques to identify the malignant growths. In orthopedics, edge detection techniques are used in the reconstruction of the skeletal system from modalities such as MRI (magnetic resonance imaging) and CT (computed tomography).;In this thesis, we develop a simple process for the three dimensional image reconstruction of the human knee, starting from computed tomography scans. Designing a digital image processing technique which successfully separates the bone from the surrounding flesh and muscle tissue is the …

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Predicting A Detailed Permeability Profile From Minipermeameter Measurements And Well Log Data, Shawn D. Nines Dec 2000

Predicting A Detailed Permeability Profile From Minipermeameter Measurements And Well Log Data, Shawn D. Nines

Graduate Theses, Dissertations, and Problem Reports (ETD)

Permeability, along with the porosity, comprises one of the two most important properties in petroleum engineering with respect producing hydrocarbon fluids.;It is standard practice in the petroleum industry to determine permeability in one of two ways. These are pressure transient testing and core analysis. Both methods are expensive in their own ways. This research focuses on a way to minimize or limit the need for both of these testing procedures.;The purpose of this research was to utilize well log data, mainly gamma ray and density, Minipermeameter values, and basic information such as depth and spatial coordinates to predict permeability in …

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Computational Model Of Ductile Erosion By Single Particle Impact, Chandrakant Rai Dec 2000

Computational Model Of Ductile Erosion By Single Particle Impact, Chandrakant Rai

Graduate Theses, Dissertations, and Problem Reports (ETD)

Erosion by solid particle impact is a common problem in many industrial applications. It results due to mechanical contact between the particle and the metal surface, which in turn result in potential material losses. Erosion of machine parts by the small solid particle entrained in liquid or gaseous working environment is a serious problem in many industrial applications. Numerous experiments have been conducted to obtain empirical relations for predicting material loss due to these impacts and to arrive at an appropriate material for a particular working environment. But with so many new materials being used for different applications, and operating …

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Approaches To Creating Anonymous Patient Database, Shijun Shen Dec 2000

Approaches To Creating Anonymous Patient Database, Shijun Shen

Graduate Theses, Dissertations, and Problem Reports (ETD)

Health care providers, health plans and health care clearinghouses collect patient medical data derived from their normal operations every day. These patient data can greatly benefit the health care organization if data mining techniques are applied upon these data sets. However, individual identifiable patient information needs to be protected in accordance with Health Insurance Portability and Accountability Act (HIPAA), and the quality of patient data also needs to be ensured in order for data mining tasks achieve accurate results. This thesis describes a patient data transformation system which transforms patient data into high quality and anonymous patient records that is …

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Dynamic Property Evaluation Of Frother, Yunkai Xia Dec 2000

Dynamic Property Evaluation Of Frother, Yunkai Xia

Graduate Theses, Dissertations, and Problem Reports (ETD)

Fourteen solvents were evaluated through frothing test and laboratory flotation batch tests. A new frothing parameter, initial dynamic froth index (IDFI), is proposed to compare the frothability of solvent. IDFI is derived from initial retention time of froth instead of retention time. IDFI is defined as the limiting slope of the initial retention time versus concentration curves while the concentration approaches zero. IDFI value depends on chemical structure and molecular weight of the solvent. Combined with normalized frothability index (NFI), normalized collapse rate constant (NKc), hydrophilic-lipophilic balance (HLB) and dynamic froth index (DFI), IDFI can be a useful index in …

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Factors Influencing Brook Trout (Salvelinus Fontinalis ) Abundance In Forested Headwater Streams With Emphasis On Fine Sediment, James Philip Hakala Dec 2000

Factors Influencing Brook Trout (Salvelinus Fontinalis ) Abundance In Forested Headwater Streams With Emphasis On Fine Sediment, James Philip Hakala

Graduate Theses, Dissertations, and Problem Reports (ETD)

The influence and relative importance of fine sediment on wild brook trout (Salvelinus fontinalis) population size was assessed. Brook trout production in headwater streams was inversely proportional to substrate permeability in one of two years, suggesting substrate composition influenced production. Results suggest the critical fine sediment size for brook trout in this study, is between 0.063 mm and 1.0 mm. Further, fine sediment (<0.063 mm) should not exceed 0.6--1.0% of spawning substrate, or negative population effects may be incurred. Under normal flow conditions, fine sediment was a principal determinant of juvenile trout abundance relative to other physical and biological factors. Adult trout abundance was principally a function of stream discharge, and is potentially further influenced by fine sediment impacts on juvenile recruitment. Spatially restricted food resources, created by drought-induced low flows in year 2 of the study, are believed to have over-powered mechanisms influencing trout abundance under normal flows.

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Mycorrhizal Roles In Broomsedge Plants Under Phosphorus Limitation And Aluminum Toxicity, Jianchang Ning Dec 2000

Mycorrhizal Roles In Broomsedge Plants Under Phosphorus Limitation And Aluminum Toxicity, Jianchang Ning

Graduate Theses, Dissertations, and Problem Reports (ETD)

This dissertation examined roles of arbuscular mycorrhizal fungi, of which Glomus clarum is the primary species, in broomsedge (Andropogon virginicus) plants under limited Pi and elevated Al conditions in four studies. The inoculum originated from an acidic coal-mining site in Morgantown, WV. The inoculum of Glomus clarum from INVAM collection, which originated from an alkaline coal-mining site in WV, was also used in two of the studies. Plants were grown in an acid-washed sand culture system with a modified Hoagland's nutrient solution in a growth chamber.;Mycorrhizal fungal colonization pronouncedly enhanced growth of broomsedge plants under limited Pi and/or elevated Al …

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Coupled Nonlinear Dynamical Systems, Hongyan Sun Dec 2000

Coupled Nonlinear Dynamical Systems, Hongyan Sun

Graduate Theses, Dissertations, and Problem Reports (ETD)

In this dissertation, we study coupled nonlinear dynamical systems that exhibit new types of complex behavior. We numerically and analytically examine a variety of dynamical models, ranging from systems of ordinary differential equations (ODE) with novel elements of feedback to systems of partial differential equations (PDE) that model chemical pattern formation. Chaos, dynamical uncertainty, synchronization, and spatiotemporal pattern formation constitute the primary topics of the dissertation. Following the introduction in Chapter 1, we study chaos and dynamical uncertainty in Chapter 2 with coupled Lorenz systems and demonstrate the existence of extreme complexity in high-dimensional ODE systems. In Chapter 3, we …

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On The Feasibility Of Integrated Optical Waveguide-Based In Situ Monitoring Of Microelectromechanical Systems (Mems), Kolin Shay Brown Dec 2000

On The Feasibility Of Integrated Optical Waveguide-Based In Situ Monitoring Of Microelectromechanical Systems (Mems), Kolin Shay Brown

Graduate Theses, Dissertations, and Problem Reports (ETD)

This dissertation explores the feasibility of using integrated optical waveguides to measure the motion of microelectromechanical structures (MEMS). MEMS are a class of silicon devices which are being developed as sensors and actuators. Because these free moving structures are fabricated using processes similar to microfabrication, MEMS devices and traditional electronics can be integrated on the same substrate. This merging of the technologies will allow the miniaturization of large scale mechanical systems. A difficulty with MEMS devices is determining the submicron motion. One method of noninvasive measurement is optical measurement. Research focused on the characterization of one particular MEMS device, a …

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Electrospray Ionization Mass Spectrometry For The Analysis Of Proteins And Small Molecules, Gregg A. Pratt Dec 2000

Electrospray Ionization Mass Spectrometry For The Analysis Of Proteins And Small Molecules, Gregg A. Pratt

Graduate Theses, Dissertations, and Problem Reports (ETD)

In this document methods for the analysis of proteins and small molecules by Electrospray Ionization Mass Spectrometry (ESI-MS) are discussed. Section I contains an introduction to ESI-MS, including a brief history of mass spectrometry, a discussion of the current theories developed to explain the mechanisms at work during the electrospray process, and an explanation of Ion Trap Mass Spectrometry (IT-MS), the type of mass analyzer used for the studies outlined in subsequent chapters.;Section II is devoted to the analysis of proteins by ESI-MS. Chapter 2 gives an overview of protein structure and reviews previous work in the area of protein …

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Process Control Of Applied Laser System For Enhanced Glass Production, Liyun Zheng Dec 2000

Process Control Of Applied Laser System For Enhanced Glass Production, Liyun Zheng

Graduate Theses, Dissertations, and Problem Reports (ETD)

Existing glass crack-off methods often result in considerable loss of glassware and require subsequent edge finishing that is labor intensive. The main objective of this dissertation is to contribute to the development of a laser-enhanced cutting and finishing method that will decrease waste and improve productivity in the manufacturing of handblown glass.;The main objectives of this dissertation were to perform modeling and simulation of the laser glass interaction, to contribute to the lab prototype machine construction, to participate in experiments to investigate the process parameters governing successful glass cutting, and to pursue the design and validation of controls for the …

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Teacher Videotaping As A Method Of Self -Assessing Questioning Skills In Secondary Public Schools, Stephen Alan Alberts Ii Dec 2000

Teacher Videotaping As A Method Of Self -Assessing Questioning Skills In Secondary Public Schools, Stephen Alan Alberts Ii

Graduate Theses, Dissertations, and Problem Reports (ETD)

Primarily this action research project was designed to hone my ability to Socratically question students by reflecting on my teaching through the lens of a videocamera---while reconciling my own paradigm with as many outside assessment devices as possible. The paramount consideration of my questioning/framing references was to incite students to think critically (see Pedagogical Skills Honed in chapter seven). The higher priorities of the outside assessors, on the other hand, were more political than instructional in nature (see Reconciling Multiple Assessments in chapter seven).;Scrutinizing and improving my questioning skills (the focus of the research) led to the epiphany that the …

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Formal Specification Of Requirements For Analytical Redundancy-Based Fault -Tolerant Flight Control Systems, Diego Del Gobbo Dec 2000

Formal Specification Of Requirements For Analytical Redundancy-Based Fault -Tolerant Flight Control Systems, Diego Del Gobbo

Graduate Theses, Dissertations, and Problem Reports (ETD)

Flight control systems are undergoing a rapid process of automation. The use of Fly-By-Wire digital flight control systems in commercial aviation (Airbus 320 and Boeing FBW-B777) is a clear sign of this trend. The increased automation goes in parallel with an increased complexity of flight control systems with obvious consequences on reliability and safety. Flight control systems must meet strict fault-tolerance requirements. The standard solution to achieving fault tolerance capability relies on multi-string architectures. On the other hand, multi-string architectures further increase the complexity of the system inducing a reduction of overall reliability.;In the past two decades a variety of …

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Coloring Clique Hypergraphs, Hoifung Poon Aug 2000

Coloring Clique Hypergraphs, Hoifung Poon

Graduate Theses, Dissertations, and Problem Reports (ETD)

Let G = (V, E) be a simple graph. The clique hypergraph of G, denoted as CH( G), has V as its set of vertices, and the maximal cliques as its hyperedges. Let Sk be a set of k colors. A map c : V Sk is a proper k-coloring for CH(G) if any maximal clique of G with at least two vertices receives at least two distinct colors. Let W ⊂ V, and let s ≥ 1. We say that G is (W, s)-extendible if any assignment on W with at most s colors can be extended to a …

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Effects Of Plant Flavonoids On The Fate Of Polynuclear Aromatic Hydrocarbons In Rhizosphere Soil, Xiujin Qui Aug 2000

Effects Of Plant Flavonoids On The Fate Of Polynuclear Aromatic Hydrocarbons In Rhizosphere Soil, Xiujin Qui

Graduate Theses, Dissertations, and Problem Reports (ETD)

High-molecular-weight polynuclear aromatic hydrocarbons (PAHs) are persistent in the environment although a wide variety of microorganisms can metabolize PAHs. In the past decades, laboratory and filed studies have shown that PAH degradation in soil is often limited by poor bioavailability and oxygen availability. Bound residue formation of PAHs with macromolecules of soil organic matter is an important fate mechanism. More recently, phytoremediation for PAH-contaminated soils is being explored. It is believed that PAH degradation may be enhanced in rhizosphere soil due to the improved aeration condition and the active soil microbial community sustained by root exudates. Whether certain root exudates …

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Fine-Scale Modeling Of Failure In An Adhesive Layer, Pulkit V. D. Mathur Aug 2000

Fine-Scale Modeling Of Failure In An Adhesive Layer, Pulkit V. D. Mathur

Graduate Theses, Dissertations, and Problem Reports (ETD)

Rigid ceramic filter media are used for removing particulate matter from gas streams at high temperatures. As the particulate matter (dust cake) collects on the surface of the filter, the filtration pressure increases; to maintain an economical operation the dust cake must be removed periodically by back-pulse cleaning. Often the dust cake is not removed completely by the back-pulse pressure and the resulting patchy cleaning affects operation.;The thesis presents the results from a fine scale modeling of the removal of a layer of filter cake by a time dependent pressure pulse. In this model the filter cake is grid in …

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Assessment Of A Space Shuttle Trajectory Evaluation System (Dolilu Ii), Diwakar Chakravarthy Aug 2000

Assessment Of A Space Shuttle Trajectory Evaluation System (Dolilu Ii), Diwakar Chakravarthy

Graduate Theses, Dissertations, and Problem Reports (ETD)

DOLILU II is a ground control system that generates space shuttle's launch trajectories, first stage guidance commands and verifies whether the generated trajectories are safe for the flight. It is a safety critical system and a high degree of confidence in its safety and reliability must be gained through assessment. We addressed three issues related to its safety and reliability assessment. We developed a reliability assessment framework for DOLILU II system. We proposed techniques to speed up test case execution and designed methodologies for the generation of input conditions needed to test the system.;We used a Bayesian statistical framework for …

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Detection Of Subsurface Anomalies In Composite Bridge Decks Using Infrared Thermography, Hasan Moh'd Alqennah Aug 2000

Detection Of Subsurface Anomalies In Composite Bridge Decks Using Infrared Thermography, Hasan Moh'd Alqennah

Graduate Theses, Dissertations, and Problem Reports (ETD)

This document presents the findings of an experimental study on the use of Infrared Thermography for nondestructive evaluation of subsurface anomalies in composite bridge decks.;Composite bridge deck specimens were constructed in the laboratory with varying subsurface delamination conditions such as sizes, thicknesses and filler materials. These simulated delaminations were placed between the 3/8&inches; thick wearing surface and the top of the fiber reinforced polymer (FRP) deck. The laboratory specimens were tested using the infrared imaging system. The infrared images from the delaminated specimens were compared with solid (undamaged) specimens to study the effect of subsurface anomalies (delaminations) on the infrared …

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Relationship Between Cutting Parameters And Bit Geometry In Rotary Cutting, Srikanth Addala Aug 2000

Relationship Between Cutting Parameters And Bit Geometry In Rotary Cutting, Srikanth Addala

Graduate Theses, Dissertations, and Problem Reports (ETD)

The main objective of this research was to investigate the relationship between cutting parameters (cutting force, penetration force, specific energy, specific respirable dust) and the bit geometry parameters (angle of the bit tip, bit tip size and shape of the bit) in order to reduce the amount of specific respirable dust generated and the specific energy consumed in rotary cutting. In the cutting process when two grooves are made in the rock at certain spacing, a land/ridge is formed between the two adjacent grooves. If that land/ridge can be removed in a cutting cycle, then a clean surface will be …

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