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Articles 1 - 30 of 102
Full-Text Articles in Engineering
Electrophoretic Deposition Of Gallium With High Deposition Rate, Hanfei Zhang, Yiping Mao, Sunand Santhanagopalan, Dennis Desheng Meng
Electrophoretic Deposition Of Gallium With High Deposition Rate, Hanfei Zhang, Yiping Mao, Sunand Santhanagopalan, Dennis Desheng Meng
Michigan Tech Publications
In this work, electrophoretic deposition (EPD) is reported to form gallium thin film with high deposition rate and low cost while avoiding the highly toxic chemicals typically used in electroplating. A maximum deposition rate of ~0.6 μm/min, almost one order of magnitude higher than the typical value reported for electroplating, is obtained when employing a set of proper deposition parameters. The thickness of the film is shown to increase with deposition time when sequential deposition is employed. The concentration of Mg(NO3)2, the charging salt, is also found to be a critical factor to control the deposition …
Me-Em Enewsbrief, December 2014, Department Of Mechanical Engineering-Engineering Mechanics, Michigan Technological University
Me-Em Enewsbrief, December 2014, Department Of Mechanical Engineering-Engineering Mechanics, Michigan Technological University
Department of Mechanical Engineering-Engineering Mechanics eNewsBrief
No abstract provided.
Low Cost Infrared And Near Infrared Sensors For Uavs, Samuel T. Aden, James P. Bialas, Zachary Champion, Eugene Levin, Jessica L. Mccarty
Low Cost Infrared And Near Infrared Sensors For Uavs, Samuel T. Aden, James P. Bialas, Zachary Champion, Eugene Levin, Jessica L. Mccarty
Michigan Tech Research Institute Publications
Thermal remote sensing has a wide range of applications, though the extent of its use is inhibited by cost. Robotic and computer components are now widely available to consumers on a scale that makes thermal data a readily accessible resource. In this project, thermal imagery collected via a lightweight remote sensing Unmanned Aerial Vehicle (UAV) was used to create a surface temperature map for the purpose of providing wildland firefighting crews with a cost-effective and time-saving resource. The UAV system proved to be flexible, allowing for customized sensor packages to be designed that could include visible or infrared cameras, GPS, …
Recent Advances In The Field Of Bionanotechnology: An Insight Into Optoelectric Bacteriorhodopsin, Quantum Dots, And Noble Metal Nanoclusters, Christopher Knoblauch, Mark Griep, Craig Friedrich
Recent Advances In The Field Of Bionanotechnology: An Insight Into Optoelectric Bacteriorhodopsin, Quantum Dots, And Noble Metal Nanoclusters, Christopher Knoblauch, Mark Griep, Craig Friedrich
Michigan Tech Publications
Molecular sensors and molecular electronics are a major component of a recent research area known as bionanotechnology, which merges biology with nanotechnology. This new class of biosensors and bioelectronics has been a subject of intense research over the past decade and has found application in a wide variety of fields. The unique characteristics of these biomolecular transduction systems has been utilized in applications ranging from solar cells and single-electron transistors (SETs) to fluorescent sensors capable of sensitive and selective detection of a wide variety of targets, both organic and inorganic. This review will discuss three major systems in the area …
Open-Source Syringe Pump Library, Bas Wijnen, Emily J. Hunt, Gerald C. Anzalone, Joshua M. Pearce
Open-Source Syringe Pump Library, Bas Wijnen, Emily J. Hunt, Gerald C. Anzalone, Joshua M. Pearce
Department of Materials Science and Engineering Publications
This article explores a new open-source method for developing and manufacturing high-quality scientific equipment suitable for use in virtually any laboratory. A syringe pump was designed using freely available open-source computer aided design (CAD) software and manufactured using an open-source RepRap 3-D printer and readily available parts. The design, bill of materials and assembly instructions are globally available to anyone wishing to use them. Details are provided covering the use of the CAD software and the RepRap 3-D printer. The use of an open-source Rasberry Pi computer as a wireless control device is also illustrated. Performance of the syringe pump …
Me-Em Enewsbrief, September 2014, Department Of Mechanical Engineering-Engineering Mechanics, Michigan Technological University
Me-Em Enewsbrief, September 2014, Department Of Mechanical Engineering-Engineering Mechanics, Michigan Technological University
Department of Mechanical Engineering-Engineering Mechanics eNewsBrief
No abstract provided.
Separation Of Ash And Sulfur Dioxide During The 2011 Grímsvötn Eruption, E. D. Moxnes, N. I. Kristiansen, A. Stohl, L. Clarisse, A. J. Durant, K. Weber, A. Vogel
Separation Of Ash And Sulfur Dioxide During The 2011 Grímsvötn Eruption, E. D. Moxnes, N. I. Kristiansen, A. Stohl, L. Clarisse, A. J. Durant, K. Weber, A. Vogel
Michigan Tech Publications
Modeling the transport of volcanic ash and gases released during volcanic eruptions is crucially dependent on knowledge of the source term of the eruption, that is, the source strength as a function of altitude and time. For the first time, an inversion method is used to estimate the source terms of both volcanic sulfur dioxide (SO2) and ash. It was applied to the explosive volcanic eruption of Grímsvötn, Iceland, in May 2011. The method uses input from the particle dispersion model, FLEXPART (flexible particle dispersion model), a priori source estimates, and satellite observations of SO2 or ash total columns from …
Absorption And Fluorescence Properties Of Chromophoric Dissolved Organic Matter Of The Eastern Bering Sea In The Summer With Special Reference To The Influence Of A Cold Pool, E. J. D'Sa, J. I. Goes, H. Gomes, C. Mouw
Absorption And Fluorescence Properties Of Chromophoric Dissolved Organic Matter Of The Eastern Bering Sea In The Summer With Special Reference To The Influence Of A Cold Pool, E. J. D'Sa, J. I. Goes, H. Gomes, C. Mouw
Michigan Tech Publications
The absorption and fluorescence properties of chromophoric dissolved organic matter (CDOM) are reported for the inner shelf, slope waters and outer shelf regions of the eastern Bering Sea during the summer of 2008, when a warm, thermally stratified surface mixed layer lay over a cold pool ( < 2 °C) that occupied the entire middle shelf. CDOM absorption at 355 nm (ag355) and its spectral slope (S) in conjunction with excitation-emission matrix (EEM) fluorescence and parallel factor analysis (PARAFAC) revealed large variability in the characteristics of CDOM in different regions of the Bering Sea. PARAFAC analysis aided in the identification of three humic-like (components one, two and five) and two protein-like (a tyrosine-like component three, and a tryptophan-like component four) components. In the extensive shelf region, average absorption coefficients at 355 nm (ag355, mg-1) and DOC concentrations (μM) were highest in the inner shelf (0.342 ± 0.11 mg-1, 92.67 ± 14.60 μM) and lower in the middle (0.226 ± 0.05 mg-1, 78.38 ± 10.64 μM) and outer (0.185 ± 0.05 mg-1, 79.24 ± 18.01 μM) shelves, respectively. DOC concentrations, however were not significantly different, suggesting CDOM sources and sinks to be uncoupled from DOC. Mean spectral slopes S were elevated in the middle shelf (24.38 ± 2.25 μmg-1) especially in the surface waters (26.87 ± 2.39 μmg-1) indicating high rates of photodegradation in the highly stratified surface mixed layer, which intensified northwards in the northern middle shelf likely contributing to greater light penetration and to phytoplankton blooms at deeper depths. The fluorescent humic-like components one, two, and five were most elevated in the inner shelf most likely from riverine inputs. Along the productive "green belt" in the outer shelf/slope region, absorption and fluorescence properties indicated the presence of fresh and degraded autochthonous DOM. Near the Unimak Pass region of the Aleutian Islands, low DOC and ag355 (mean 66.99 ± 7.94 μM; 0.182 ± 0.05 mg-1) and a high S (mean 25.95 ± 1.58 μmg-1) suggested substantial photobleaching of the Alaska Coastal Water, but high intensities of humic-like and protein-like fluorescence suggested sources of fluorescent DOM from coastal runoff and glacier meltwaters during the summer. The spectral slope S vs. ag355 relationship revealed terrestrial and oceanic end members along with intermediate water masses that were modeled using nonlinear regression equations that could allow water mass differentiation based on CDOM optical properties. Spectral slope S was negatively correlated (r2 = 0.79) with apparent oxygen utilization (AOU) for waters extending from the middle shelf into the deep Bering Sea indicating increasing microbial alteration of CDOM with depth. Although our data show that the CDOM photochemical environment of the Bering Sea is complex, our current information on its optical properties will aid in better understanding of the biogeochemical role of CDOM in carbon budgets in relation to the annual sea ice and phytoplankton dynamics, and to improved algorithms of ocean color remote sensing for this region.
Me-Em Enewsbrief, June 2014, Department Of Mechanical Engineering-Engineering Mechanics, Michigan Technological University
Me-Em Enewsbrief, June 2014, Department Of Mechanical Engineering-Engineering Mechanics, Michigan Technological University
Department of Mechanical Engineering-Engineering Mechanics eNewsBrief
No abstract provided.
Seasonal Variability And Long-Term Evolution Of Tropospheric Composition In The Tropics And Southern Hemisphere, K. M. Wai, S. Wu, A. Kumar, H. Liao
Seasonal Variability And Long-Term Evolution Of Tropospheric Composition In The Tropics And Southern Hemisphere, K. M. Wai, S. Wu, A. Kumar, H. Liao
Michigan Tech Publications
Impacts on tropospheric composition in the tropics and the Southern Hemisphere from biomass burning and other emission sources are studied using a global chemical transport model, surface measurements and satellite retrievals. Seasonal variations in observed CO at remote island sites are examined. Easter Island (eastern Pacific Ocean) is impacted indirectly by the hemispheric zonal transport of CO due to the burning in southern Africa/South America, via the westerlies. An increasing trend in CO by 0.33 ppb yr-1 in the past decade at Ascension Island is attributed to the combined effects of South American/southern Africa burnings and the increases in CH4 …
Effects Of Stratospheric Ozone Recovery On Photochemistry And Ozone Air Quality In The Troposphere, H. Zhang, Shiliang Wu, Y. Huang, Y. Wang
Effects Of Stratospheric Ozone Recovery On Photochemistry And Ozone Air Quality In The Troposphere, H. Zhang, Shiliang Wu, Y. Huang, Y. Wang
Michigan Tech Publications
There has been significant stratospheric ozone depletion since the late 1970s due to ozone-depleting substances (ODSs). With the implementation of the Montreal Protocol and its amendments and adjustments, stratospheric ozone is expected to recover towards its pre-1980 level in the coming decades. In this study, we examine the implications of stratospheric ozone recovery for the tropospheric chemistry and ozone air quality with a global chemical transport model (GEOS-Chem). With a full recovery of the stratospheric ozone, the projected increases in ozone column range from 1% over the low latitudes to more than 10% over the polar regions. The sensitivity factor …
Summer 2014 Biomedical Engineering Newsletter, Department Of Biomedical Engineering, Michigan Technological University
Summer 2014 Biomedical Engineering Newsletter, Department Of Biomedical Engineering, Michigan Technological University
Department of Biomedical Engineering Newsletters
Table of Contents
- New IEEE, AIMBE and SPIE fellows
- Arteries on aisle 9
- Implants with sensors that shake off infection
- Mitch Kirby wins Whitaker International Fellowship
- Skin patch warns when it’s time to get out of the sun
The Circuit, Spring 2014, Department Of Electrical And Computer Engineering, Michigan Technological University
The Circuit, Spring 2014, Department Of Electrical And Computer Engineering, Michigan Technological University
Department of Electrical and Computer Engineering Newsletters
Table of Contents:
- Department News
- Research News
- Alumni Spotlight
- Faculty News
- 2013 Highlights
Application Of Sub-Micrometer Vibrations To Mitigate Bacterial Adhesion, Will R. Paces, Hal Holmes, Eli Vlaisavljevich, Katherine L. Snyder, Ee Lim Tan, Rupak Rajachar, Keat Ghee Ong
Application Of Sub-Micrometer Vibrations To Mitigate Bacterial Adhesion, Will R. Paces, Hal Holmes, Eli Vlaisavljevich, Katherine L. Snyder, Ee Lim Tan, Rupak Rajachar, Keat Ghee Ong
Michigan Tech Publications
As a prominent concern regarding implantable devices, eliminating the threat of opportunistic bacterial infection represents a significant benefit to both patient health and device function. Current treatment options focus on chemical approaches to negate bacterial adhesion, however, these methods are in some ways limited. The scope of this study was to assess the efficacy of a novel means of modulating bacterial adhesion through the application of vibrations using magnetoelastic materials. Magnetoelastic materials possess unique magnetostrictive property that can convert a magnetic field stimulus into a mechanical deformation. In vitro experiments demonstrated that vibrational loads generated by the magnetoelastic materials significantly …
Rotational Torque Measurement Device, Paul A. Lavigne, Daniel R. Kemppainen, Glen L. Barna
Rotational Torque Measurement Device, Paul A. Lavigne, Daniel R. Kemppainen, Glen L. Barna
Michigan Tech Patents
A device for measuring torque applied through a rotating member. A first torsion reference member is fixedly coupled to the rotating member at a first axial position and a second torsion reference member is fixedly coupled to the rotating member at a second axial position. A first detector detects the passage of the first torsion reference member past the first detector upon each full rotation of the rotating member and to generate a first signal upon each passage of the first torsion reference member. A second detector detects the passage of the second torsion reference member past the second detector …
Me-Em Enewsbrief, March 2014, Department Of Mechanical Engineering-Engineering Mechanics, Michigan Technological University
Me-Em Enewsbrief, March 2014, Department Of Mechanical Engineering-Engineering Mechanics, Michigan Technological University
Department of Mechanical Engineering-Engineering Mechanics eNewsBrief
No abstract provided.
Mechanical Properties Of Components Fabricated With Open-Source 3-D Printers Under Realistic Environmental Conditions, B. M. Tymrak, M Kreiger, Joshua M. Pearce
Mechanical Properties Of Components Fabricated With Open-Source 3-D Printers Under Realistic Environmental Conditions, B. M. Tymrak, M Kreiger, Joshua M. Pearce
Department of Materials Science and Engineering Publications
he recent development of the RepRap, an open-source self-replicating rapid prototyper, has made 3-D polymer-based printers readily available to the public at low costs ( < $500). The resultant uptake of 3-D printing technology enables for the first time mass-scale distributed digital manufacturing. RepRap variants currently fabricate objects primarily from acrylonitrile butadiene styrene (ABS) and polylactic acid (PLA), which have melting temperatures low enough to use in melt extrusion outside of a dedicated facility, while high enough for prints to retain their shape at average use temperatures. In order for RepRap printed parts to be useful for engineering applications the mechanical properties of printed parts must be known. This study quantifies the basic tensile strength and elastic modulus of printed components using realistic environmental conditions for standard users of a selection of open-source 3-D printers. The results find average tensile strengths of 28.5 MPa for ABS and 56.6 MPa for PLA with average elastic moduli of 1807 MPa for ABS and 3368 MPa for PLA. It is clear from these results that parts printed from tuned, low-cost, open-source RepRap 3-D printers can be considered as mechanically functional in tensile applications as those from commercial vendors.
Dynamical Instability And Fermi Surface Topology In Ni2Fega From First Principles, Satyananda Chabungbam, Gowtham S, Munima Sahariah
Dynamical Instability And Fermi Surface Topology In Ni2Fega From First Principles, Satyananda Chabungbam, Gowtham S, Munima Sahariah
Data Science Publications
The phonon spectrum of stoichiometric Heusler alloy Ni2FeGa is calculated for the high-temperature cubic austenite phase by using first-principles density functional perturbation theory. We also compute the elastic constants of the alloy from the initial slopes of the acoustic phonon branch. The TA2 phonon branch along [110] direction shows softening with a minimum dip at ζ=0.58 which indicates the possibility of modulated phases prior to martensitic transformation. We also map the Fermi surface of this alloy both in 3D and 2D to check the presence of any nesting vectors. The observed nesting parameter is in good agreement …
Anti-Icing Coatings And Methods, Russell G. Alger
Anti-Icing Coatings And Methods, Russell G. Alger
Michigan Tech Patents
A method of inhibiting or preventing bonding between snow or ice and a substrate. The method includes applying an adhesive to the substrate, broadcasting an aggregate onto the adhesive, the aggregate having the capacity to receive an anti-icing chemical into the aggregate, and applying the antiicing chemical onto the aggregate so that at least a portion of the anti-icing chemical is received into at least a portion of the aggregate.
Synthesis Of Carbon Nitrides From Carbon Dioxide, Yun Hang Hu
Synthesis Of Carbon Nitrides From Carbon Dioxide, Yun Hang Hu
Michigan Tech Patents
Provided are methods of converting carbon dioxide to carbon nitrides. In a first reaction, carbon dioxide may be reacted with metal nitrides, such as Li.sub.3N, to form carbon nitrides in a fast and exothermic reaction. Also provided are methods of using product metal cyanamides from the first reaction to subsequently generate additional carbon nitrides.
2013-2014 Che Newsletter, Department Of Chemical Engineering, Michigan Technological University
2013-2014 Che Newsletter, Department Of Chemical Engineering, Michigan Technological University
Department of Chemical Engineering Newsletters
Table of Contents
- Department
- Research
- Student News
- Faculty News
- Alumni & Friends
2014 Civil And Environmental Engineering Department News, Department Of Civil And Environmental Engineering, Michigan Technological University
2014 Civil And Environmental Engineering Department News, Department Of Civil And Environmental Engineering, Michigan Technological University
Department of Civil, Environmental, and Geospatial Engineering Newsletters
Table of Contents
- Student Awards
- Research Awards
- Faculty News
- Alumni News
- Department News
- Academy of Civil and Environmental Engineers
- CEE Donor Recognition
Me-Em 2013-14 Annual Report, Department Of Mechanical Engineering-Engineering Mechanics, Michigan Technological University
Me-Em 2013-14 Annual Report, Department Of Mechanical Engineering-Engineering Mechanics, Michigan Technological University
Department of Mechanical Engineering-Engineering Mechanics Annual Reports
Table of Contents
- Human-Centered Engineering
- Enrollment & Degrees
- Graduates
- Faculty & Staff
- Alumni
- Donors
- Contracts & Grants
- Patents & Publications
Mse Annual Report 2014, Department Of Materials Science And Engineering, Michigan Technological University
Mse Annual Report 2014, Department Of Materials Science And Engineering, Michigan Technological University
Department of Materials Science and Engineering Annual Reports
Table of Contents
- Department Legends
- Wonder Material
- Student News
- Faculty and Staff News
- Alumni News
- Endowed Scholarships
Development Of Confocal Imaging Techniques For Probing Interfacial Dynamics In Microscale, Gas-Liquid, Two-Phase Flow, Joseph E. Hernandez
Development Of Confocal Imaging Techniques For Probing Interfacial Dynamics In Microscale, Gas-Liquid, Two-Phase Flow, Joseph E. Hernandez
Dissertations, Master's Theses and Master's Reports - Open
Micro-scale, two-phase flow is found in a variety of devices such as Lab-on-a-chip, bio-chips, micro-heat exchangers, and fuel cells. Knowledge of the fluid behavior near the dynamic gas-liquid interface is required for developing accurate predictive models. Light is distorted near a curved gas-liquid interface preventing accurate measurement of interfacial shape and internal liquid velocities. This research focused on the development of experimental methods designed to isolate and probe dynamic liquid films and measure velocity fields near a moving gas-liquid interface. A high-speed, reflectance, swept-field confocal (RSFC) imaging system was developed for imaging near curved surfaces.
Experimental studies of dynamic gas-liquid …
Factors Influencing Material Loss During Iron Ore Pellet Handling, Joseph A. Halt
Factors Influencing Material Loss During Iron Ore Pellet Handling, Joseph A. Halt
Dissertations, Master's Theses and Master's Reports - Open
Iron ore concentrate pellets have the potential to fracture and abrade during transportation and handling, which produces unwanted fine particulates and dust. Consequently, pellet producers characterize the abrasion resistance of their pellets, using an Abrasion Index (AI), to indicate whether their products will produce unacceptable levels of fines. However, no one has ever investigated whether the AI correlates to pellet dustiness.
During the course of this research, we investigated the relationship between AI and iron ore concentrate pellet dustiness using a wide range of industrial and laboratory pellet samples. The results showed that, in general, AI can be used to …
Comparison Of Computer-Based And Optical Face Recognition Paradigms, Abdulaziz A. Alorf
Comparison Of Computer-Based And Optical Face Recognition Paradigms, Abdulaziz A. Alorf
Dissertations, Master's Theses and Master's Reports - Open
The main objectives of this thesis are to validate an improved principal components analysis (IPCA) algorithm on images; designing and simulating a digital model for image compression, face recognition and image detection by using a principal components analysis (PCA) algorithm and the IPCA algorithm; designing and simulating an optical model for face recognition and object detection by using the joint transform correlator (JTC); establishing detection and recognition thresholds for each model; comparing between the performance of the PCA algorithm and the performance of the IPCA algorithm in compression, recognition and, detection; and comparing between the performance of the digital model …
Use Of An Electrical Impedance Tomography Method To Detect And Track Fractures In A Gelatin Medium, Evan G. Lucas
Use Of An Electrical Impedance Tomography Method To Detect And Track Fractures In A Gelatin Medium, Evan G. Lucas
Dissertations, Master's Theses and Master's Reports - Open
Electrical impedance tomography is applied to the problem of detecting, locating, and tracking fractures in ballistics gelatin. The hardware developed is intended to be physically robust and based on off-the-shelf hardware. Fractures were created in two separate ways: by shooting a .22 caliber bullet into the gelatin and by injecting saline solution into the gelatin. The .22 caliber bullet created an air gap, which was seen as an increase in resistivity. The saline solution created a fluid filled gap, which was seen as a decrease in resistivity. A double linear array was used to take data for each of the …
Assessment Of Flood Risk Under Future Climate Conditions, Kaye M. Lafond
Assessment Of Flood Risk Under Future Climate Conditions, Kaye M. Lafond
Dissertations, Master's Theses and Master's Reports - Open
Global climate change is predicted to have impacts on the frequency and severity of flood events. In this study, output from Global Circulation Models (GCMs) for a range of possible future climate scenarios was used to force hydrologic models for four case study watersheds built using the Soil and Water Assessment Tool (SWAT). GCM output was applied with either the "delta change" method or a bias correction. Potential changes in flood risk are assessed based on modeling results and possible relationships to watershed characteristics. Differences in model outputs when using the two different methods of adjusting GCM output are also …
Using Probabilistic Graphical Models To Draw Inferences In Sensor Networks With Tracking Applications, Lufeng Shi
Using Probabilistic Graphical Models To Draw Inferences In Sensor Networks With Tracking Applications, Lufeng Shi
Dissertations, Master's Theses and Master's Reports - Open
Sensor networks have been an active research area in the past decade due to the variety of their applications. Many research studies have been conducted to solve the problems underlying the middleware services of sensor networks, such as self-deployment, self-localization, and synchronization. With the provided middleware services, sensor networks have grown into a mature technology to be used as a detection and surveillance paradigm for many real-world applications.
The individual sensors are small in size. Thus, they can be deployed in areas with limited space to make unobstructed measurements in locations where the traditional centralized systems would have trouble to …