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121	Gluing Kerfing Hemphill, Bill 28 October 2021 (has links) https://dc.etsu.edu/oer-guitars-images-complete/1009/thumbnail.jpg Acoustics, Dynamics, and Controls Algebra Algebraic Geometry Appalachian Studies Applied Mathematics Biology Computer-Aided Engineering and Design Engineering Education Engineering Science and Materials Forest Sciences Industrial and Product Design Manufacturing Music Other Engineering Physics Polymer and Organic Materials Polymer Science Science and Mathematics Education
122	Screenshot 3D Pen BBT Side Mold Assy M02D with Spreader Hemphill, Bill 01 January 2022 (has links) https://dc.etsu.edu/oer-guitars-images-complete/1010/thumbnail.jpg Acoustics, Dynamics, and Controls Algebra Algebraic Geometry Appalachian Studies Applied Mathematics Biology Computer-Aided Engineering and Design Engineering Education Engineering Science and Materials Forest Sciences Industrial and Product Design Manufacturing Music Other Engineering Physics Polymer and Organic Materials Polymer Science Science and Mathematics Education
123	Screenshot BBT Side Mold Assy M02D RC02 Hemphill, Bill 07 June 2022 (has links) https://dc.etsu.edu/oer-guitars-images-complete/1011/thumbnail.jpg Acoustics, Dynamics, and Controls Algebra Algebraic Geometry Appalachian Studies Applied Mathematics Biology Computer-Aided Engineering and Design Engineering Education Engineering Science and Materials Forest Sciences Industrial and Product Design Manufacturing Music Other Engineering Physics Polymer and Organic Materials Polymer Science Science and Mathematics Education
124	Screenshot CNC Toolpaths BBT Side Mold Assy M02D RC02 Hemphill, Bill 07 June 2022 (has links) https://dc.etsu.edu/oer-guitars-images-complete/1012/thumbnail.jpg Acoustics, Dynamics, and Controls Algebra Algebraic Geometry Appalachian Studies Applied Mathematics Biology Computer-Aided Engineering and Design Engineering Education Engineering Science and Materials Forest Sciences Industrial and Product Design Manufacturing Music Other Engineering Physics Polymer and Organic Materials Polymer Science Science and Mathematics Education
125	Screenshot Dimensions BBT Side Mold Assy M02D RC02 Hemphill, Bill 07 June 2022 (has links) https://dc.etsu.edu/oer-guitars-images-complete/1013/thumbnail.jpg Acoustics, Dynamics, and Controls Algebra Algebraic Geometry Appalachian Studies Applied Mathematics Biology Computer-Aided Engineering and Design Engineering Education Engineering Science and Materials Forest Sciences Industrial and Product Design Manufacturing Music Other Engineering Physics Polymer and Organic Materials Polymer Science Science and Mathematics Education
126	Screenshot Drill Template BBT Side Mold Assy M02D RC02 Hemphill, Bill 07 June 2022 (has links) https://dc.etsu.edu/oer-guitars-images-complete/1014/thumbnail.jpg Acoustics, Dynamics, and Controls Algebra Algebraic Geometry Appalachian Studies Applied Mathematics Biology Computer-Aided Engineering and Design Engineering Education Engineering Science and Materials Forest Sciences Industrial and Product Design Manufacturing Music Other Engineering Physics Polymer and Organic Materials Polymer Science Science and Mathematics Education
127	A Single-Stage Passive Vibration Isolation System for Scanning Tunneling Microscopy Le, Toan T 01 February 2021 (has links) (PDF) Scanning Tunneling Microscopy (STM) uses quantum tunneling effect to study the surfaces of materials on an atomic scale. Since the probe of the microscope is on the order of nanometers away from the surface, the device is prone to noises due to vibrations from the surroundings. To minimize the random noises and floor vibrations, passive vibration isolation is a commonly used technique due to its low cost and simpler design compared to active vibration isolation, especially when the entire vibration isolation system (VIS) stays inside an Ultra High Vacuum (UHV) environment. This research aims to analyze and build a single-stage passive VIS for an STM. The VIS consists of a mass-spring system staying inside an aluminum hollow tube. The mass-spring system is comprised of a circular copper stage suspended by a combination of six extension springs, and the STM stays on top of the copper stage. Magnetic damping with neodymium magnets, which induces eddy currents in the copper conductor, is the primary damping method to reduce the vibrations transferred to the mass-spring system. FEMM and MATLAB® are used to model magnetic flux density and damping coefficients from eddy current effect, which will help determine the necessary damping ratios for the VIS. Viton, which demonstrates a high compatibility with vacuum environments, will also serve as a great damping material between joints and contacts for the housing tube. Viton will be modeled as a Mooney-Rivlin hyperelastic material whose material parameters are previous studied, and Abaqus will be used as a Finite Element Analysis software to study the Viton gaskets’ natural frequencies. The natural frequencies of the aluminum hollow tube will also be investigated through Abaqus. Dynamics Vibrations Scanning Tunneling Microscope Viton Viscoelastic Viscohyperelastic Eddy Current Magnetic Damping FEA MATLAB® Abaqus FEMM Acoustics, Dynamics, and Controls Applied Mechanics Computational Engineering Computer-Aided Engineering and Design Dynamics and Dynamical Systems Engineering Mechanics Engineering Science and Materials Mechanical Engineering Mechanics of Materials Other Mechanical Engineering
128	Moisture effects on visible near-infrared and mid-infrared soil spectra and strategies to mitigate the impact for predictive modeling Silva, Francis Hettige Chamika Anuradha 08 December 2023 (has links) (PDF) Instrumental disparities and soil moisture are two of the key limitations in implementing spectroscopic techniques in the field. This study sought to address these challenges through two objectives. The first objective was to assess Visible-near infrared (VisNIR) and mid-infrared (MIR) spectroscopic approaches and explore the feasibility of transferring calibration models between laboratory and portable spectrometers. The second objective addressed the challenge of soil moisture and its impact on spectra. The portable spectrometers demonstrated comparable performance to their laboratory-based counterparts in both regions. Spiking with extra-weight, was the most effective calibration transfer method eliminating disparities between instruments. The samples were rewetted under nine controlled conditions for the moisture study. Results showed that spiking with extra weights significantly outperformed other techniques and model enhancement was insensitive to the moisture contents. Findings of this study will be helpful for development and deployment of in situ sensors to enable field implementation of spectroscopy. Soil Spectroscopy Extra-weighted Spiking Partial least square regression Machine learning Moisture impact Moisture correction Soil chemical properties Mid infrared spectroscopy Agricultural Science Agriculture Biology and Biomimetic Materials Chemical Engineering Engineering Engineering Science and Materials Life Sciences Materials Science and Engineering Research Methods in Life Sciences
129	Open Guitar Building Project Hemphill, Bill 01 January 2022 (has links) The ETSU Guitar Project’s Open Education Resource (OER) site is a repository of shareable files developed and used in the design & fabrication of electric and acoustic guitars. Begun in 2010, the ETSU Guitar Building Program is affiliated with the NSF-sponsored, national STEM Guitar Project to increase student engagement in the STEM disciplines from K-12 to Higher Ed. Guitar design, prototyping & build activities in the ENTC 3600 Manufacturing Technologies course use a hands-on mix of 2D CADD, 3D modeling, traditional woodworking, CNC routing and laser etching operations in a custom shop-type environment to create unique electric solid body and semi-hollow body electric guitars. Beginning in 2019, the Engineering Technology program faculty began partnering with faculty in ETSU’s groundbreaking Department of Bluegrass, Old Time, and Roots Music Studies program in building acoustic instruments. Designs of common and specialty acoustic instrument building including luthiers’ tooling, molds, templates, jigs and fixtures as well as alternative bracing are available from this repository. / https://dc.etsu.edu/etsu-oer/1009/thumbnail.jpg OER guitars electric guitars acoustic guitars engineering Acoustics, Dynamics, and Controls Algebra Algebraic Geometry Appalachian Studies Applied Mathematics Biology Computer-Aided Engineering and Design Engineering Education Engineering Science and Materials Forest Sciences Industrial and Product Design Manufacturing Music Other Engineering Physics Polymer and Organic Materials Polymer Chemistry Science and Mathematics Education
130	BBT Side Mold Assy Hemphill, Bill 07 June 2022 (has links) This electronic document file set covers the design and fabrication information of the ETSU Guitar Building Project’s BBT (OM-sized) Side Mold Assy for use with the STEM Guitar Project’s standard acoustic guitar kit. The extended 'as built' data set contains an overview file and companion video, the 'parent' CADD drawing, CADD data for laser etching and cutting a drill &/or layout template, CADD drawings in AutoCAD .DWG and .DXF R12 formats of the centerline tool paths for creating the mold assembly pieces on an AXYZ CNC router, and support documentation for CAM applications including router bit specifications, feeds, speed, multi-pass data, and layer names (formatted for AXYZ's ToolPath CAM software). BBT acoustic guitar mold side assembly CAD CADD DWG CNC router luthier ETSU OM orchestra model STEM kit storefront plywood MDF edges centerline toolpaths laser template Acoustics, Dynamics, and Controls Algebra Algebraic Geometry Appalachian Studies Applied Mathematics Biology Computer-Aided Engineering and Design Engineering Education Engineering Science and Materials Forest Sciences Industrial and Product Design Manufacturing Music Other Engineering Physics Polymer and Organic Materials Polymer Chemistry Science and Mathematics Education

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