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Articles 1 - 6 of 6
Full-Text Articles in Mechanical Engineering
Mechano-Magnetic Telemetry For Urban Infrastructure Monitoring, Daniel Jerome Orfeo
Mechano-Magnetic Telemetry For Urban Infrastructure Monitoring, Daniel Jerome Orfeo
Graduate College Dissertations and Theses
Many cities seek utilities monitoring with centrally managed Internet of Things (IoT) systems. This requires the development of numerous reliable low-cost wireless sensors, such as water temperature and flow meters, that can transmit information from subterranean pipes to surface-mounted receivers. Traditional radio communication systems are either unable to penetrate through multiple feet of earthen and manmade material, or have impractically large energy requirements which necessitate either frequent replacement of batteries, or a complex (and expensive) built-in energy harvesting system. Magnetic signaling systems do not suffer from this drawback: low-frequency electromagnetic waves have been shown to penetrate well through several feet …
Rotating Magnetometry For Terrestrial And Extraterrestrial Subsurface Explorations, Robert Farrell
Rotating Magnetometry For Terrestrial And Extraterrestrial Subsurface Explorations, Robert Farrell
Graduate College Dissertations and Theses
Signaling and sensing with rotating magnet sources have both Terrestrial and Extraterrestrial applications. The dual spinning magnet unit presented in this paper is a simple, lightweight solution to help understand soil densities and locate water and ice pockets, for example, on Mars. Traditional magnetic telemetry systems that use energy-inefficient large induction coils and antennas as sources and receivers are not practical for extraterrestrial and remote field sensing applications. The recent proliferation of strong rare-earth permanent magnets and high-sensitivity magnetometers enables alternative magnetic telemetry system concepts with significantly more compact formats and lower energy consumption. There are also terrestrial applications, for …
Design And Evaluation Of A Tactile Texture Production System, Samuel Benjamin Fertel Shuster
Design And Evaluation Of A Tactile Texture Production System, Samuel Benjamin Fertel Shuster
Graduate College Dissertations and Theses
Students who are blind or have low-vision (BLV) do not have the same access to graphical curricular content as their sighted peers. This significantly affects their education, particularly in STEM subjects. Introduction of interactive tactile graphics is one of the only ways for BLV students to access graphical content, and is uniquely suited to teaching drawing skills. The goal of this engineering design project was to expand the capacity of printing technology that produces interactive raised-line graphics by creating a system to print textures that meet specific criteria for usefulness. The addition of textures to tactile graphics is essential for …
Novelty Detection Of Machinery Using A Non-Parametric Machine Learning Approach, Enrique Angola
Novelty Detection Of Machinery Using A Non-Parametric Machine Learning Approach, Enrique Angola
Graduate College Dissertations and Theses
A novelty detection algorithm inspired by human audio pattern recognition is conceptualized and experimentally tested. This anomaly detection technique can be used to monitor the health of a machine or could also be coupled with a current state of the art system to enhance its fault detection capabilities. Time-domain data obtained from a microphone is processed by applying a short-time FFT, which returns time-frequency patterns. Such patterns are fed to a machine learning algorithm, which is designed to detect novel signals and identify windows in the frequency domain where such novelties occur. The algorithm presented in this paper uses one-dimensional …
Large Eddy Simulation Of Oscillatory Flow Over A Mobile Rippled Bed Using An Euler-Lagrange Approach, Daniel S. Hagan
Large Eddy Simulation Of Oscillatory Flow Over A Mobile Rippled Bed Using An Euler-Lagrange Approach, Daniel S. Hagan
Graduate College Dissertations and Theses
A volume-filtered Large-Eddy Simulation (LES) of oscillatory flow over a rippled mobile bed is conducted using an Euler-Lagrange approach. As in unsteady marine flows over sedimentary beds, the experimental data, referenced in this work for validation, shows quasi-steady state ripples in the sand bed under oscillatory flow. This work approximately reproduces this configuration with a sinusoidal pressure gradient driven flow and a sinusoidally rippled bed of particles. The LES equations, which are volume-filtered to account for the effect of the particles, are solved on an Eulerian grid, and the particles are tracked in a Lagrangian framework. In the Discrete Particle …
Numerical Modeling Of Collision And Agglomeration Of Adhesive Particles In Turbulent Flows, Farzad Farajidizaji
Numerical Modeling Of Collision And Agglomeration Of Adhesive Particles In Turbulent Flows, Farzad Farajidizaji
Graduate College Dissertations and Theses
Particle motion, clustering and agglomeration play an important role in natural phenomena and industrial processes. In classical computational fluid dynamics (CFD), there are three major methods which can be used to predict the flow field and consequently the behavior of particles in flow-fields: 1) direct numerical simulation (DNS) which is very expensive and time consuming, 2) large eddy simulation (LES) which resolves the large scale but not the small scale fluctuations, and 3) Reynolds-Averaged Navier-Stokes (RANS) which can only predict the mean flow. In order to make LES and RANS usable for studying the behavior of small suspended particles, we …