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Articles 43831 - 43860 of 196454
Full-Text Articles in Engineering
Ulmus_Laevis, Viraj Kishorkumar Gajjar, Anand Nambisan, Kurt Louis Kosbar
Ulmus_Laevis, Viraj Kishorkumar Gajjar, Anand Nambisan, Kurt Louis Kosbar
Plant Identification in a Combined-Imbalanced Leaf Dataset -- Images
No abstract provided.
Acer Negundo, Viraj Kishorkumar Gajjar, Anand Nambisan, Kurt Louis Kosbar
Acer Negundo, Viraj Kishorkumar Gajjar, Anand Nambisan, Kurt Louis Kosbar
Plant Identification in a Combined-Imbalanced Leaf Dataset -- Images
No abstract provided.
Carya Cordiformis, Viraj Kishorkumar Gajjar, Anand Nambisan, Kurt Louis Kosbar
Carya Cordiformis, Viraj Kishorkumar Gajjar, Anand Nambisan, Kurt Louis Kosbar
Plant Identification in a Combined-Imbalanced Leaf Dataset -- Images
No abstract provided.
Fraxinus Nigra, Viraj Kishorkumar Gajjar, Anand Nambisan, Kurt Louis Kosbar
Fraxinus Nigra, Viraj Kishorkumar Gajjar, Anand Nambisan, Kurt Louis Kosbar
Plant Identification in a Combined-Imbalanced Leaf Dataset -- Images
No abstract provided.
Liriodendron Tulipifera, Viraj Kishorkumar Gajjar, Anand Nambisan, Kurt Louis Kosbar
Liriodendron Tulipifera, Viraj Kishorkumar Gajjar, Anand Nambisan, Kurt Louis Kosbar
Plant Identification in a Combined-Imbalanced Leaf Dataset -- Images
No abstract provided.
Magnolia Denudata, Viraj Kishorkumar Gajjar, Anand Nambisan, Kurt Louis Kosbar
Magnolia Denudata, Viraj Kishorkumar Gajjar, Anand Nambisan, Kurt Louis Kosbar
Plant Identification in a Combined-Imbalanced Leaf Dataset -- Images
No abstract provided.
Olea Oleaster, Viraj Kishorkumar Gajjar, Anand Nambisan, Kurt Louis Kosbar
Olea Oleaster, Viraj Kishorkumar Gajjar, Anand Nambisan, Kurt Louis Kosbar
Plant Identification in a Combined-Imbalanced Leaf Dataset -- Images
No abstract provided.
Salix Caroliniana, Viraj Kishorkumar Gajjar, Anand Nambisan, Kurt Louis Kosbar
Salix Caroliniana, Viraj Kishorkumar Gajjar, Anand Nambisan, Kurt Louis Kosbar
Plant Identification in a Combined-Imbalanced Leaf Dataset -- Images
No abstract provided.
Salix Purpurea, Viraj Kishorkumar Gajjar, Anand Nambisan, Kurt Louis Kosbar
Salix Purpurea, Viraj Kishorkumar Gajjar, Anand Nambisan, Kurt Louis Kosbar
Plant Identification in a Combined-Imbalanced Leaf Dataset -- Images
No abstract provided.
Ultra Low-Cycle Fatigue Behavior Comparison Between Additively Manufactured And Rolled 17-4 Ph (Aisi 630) Stainless Steels, David Gonzalez-Nino, Timothy Strasser, Gary S. Prinz
Ultra Low-Cycle Fatigue Behavior Comparison Between Additively Manufactured And Rolled 17-4 Ph (Aisi 630) Stainless Steels, David Gonzalez-Nino, Timothy Strasser, Gary S. Prinz
Civil Engineering Faculty Publications and Presentations
This study investigates the mechanical behavior of additively manufactured (AM) 17-4 PH (AISI 630) stainless steels and compares their behavior to traditionally produced wrought counterparts. The goal of this study is to understand the key parameters influencing AM 17-4 PH steel fatigue life under ULCF conditions and to develop simple predictive models for fatigue-life estimation in AM 17-4 steel components. In this study, both AM and traditionally produced (wrought) material samples are fatigue tested under fully reversed (R = −1) strain controlled (2–4% strain) loading and characterized using micro-hardness, x-ray diffraction, and fractography methods. Results indicate decreased fatigue life for …
The Primarily Undergraduate Nanomaterials Cooperative: A New Model For Supporting Collaborative Research At Small Institutions On A National Scale, Steven M. Huges, Mark P. Hendricks, Katherine M. Mullaugh, Mary E. Anderson, Anne K. Bently, Justin G. Clar, Clyde A. Daly Jr., Mark D. Ellison, Z. Vivian Feng, Natalia I. Gonzalex-Pech, Leslie S. Hamachi, Christine L. Heinecke, Joseph D. Keene, Adam M. Maley, Andrea M. Munro, Peter N. Njoki, Jacob H. Olshansky, Katherine E. Plass, Kathryn R. Riley, Matthew D. Sonntag, Sarah K. St. Angelo, Lucas B. Thompson, Emily J. Tollefson, Lauren E. Toote, Korin E. Wheeler
The Primarily Undergraduate Nanomaterials Cooperative: A New Model For Supporting Collaborative Research At Small Institutions On A National Scale, Steven M. Huges, Mark P. Hendricks, Katherine M. Mullaugh, Mary E. Anderson, Anne K. Bently, Justin G. Clar, Clyde A. Daly Jr., Mark D. Ellison, Z. Vivian Feng, Natalia I. Gonzalex-Pech, Leslie S. Hamachi, Christine L. Heinecke, Joseph D. Keene, Adam M. Maley, Andrea M. Munro, Peter N. Njoki, Jacob H. Olshansky, Katherine E. Plass, Kathryn R. Riley, Matthew D. Sonntag, Sarah K. St. Angelo, Lucas B. Thompson, Emily J. Tollefson, Lauren E. Toote, Korin E. Wheeler
Chemistry Faculty Publications
The Primarily Undergraduate Nanomaterials Cooperative (PUNC) is an organization for research-active faculty studying nanomaterials at Primarily Undergraduate Institutions (PUIs), where undergraduate teaching and research go hand-in-hand. In this perspective, we outline the differences in maintaining an active research group at a PUI compared to an R1 institution. We also discuss the work of PUNC, which focuses on community building, instrument sharing, and facilitating new collaborations. Currently consisting of 37 members from across the United States, PUNC has created an online community consisting of its Web site (nanocooperative.org), a weekly online summer group meeting program for faculty and students, …
Experimental Heat Transfer Investigations Of A Double Pipe U-Tube Heat Exchanger Equipped With Twisted Tape And Cut Twisted Tape Internals, Raj Kumar Nayak Maloth, Glen Cletus Dsouza, Swarna Mayee Patra
Experimental Heat Transfer Investigations Of A Double Pipe U-Tube Heat Exchanger Equipped With Twisted Tape And Cut Twisted Tape Internals, Raj Kumar Nayak Maloth, Glen Cletus Dsouza, Swarna Mayee Patra
Mechanical and Materials Engineering Publications
For several decades, the use of heat exchangers for both heating and cooling applications has been established in industries ranging from process to space heating. Out of the various types of heat exchangers, U-tube heat exchangers are preferred owing to their abilities to handle larger flowrates and their simplicity in construction. U-tube exchangers are often equipped with innards of various forms which facilitate higher heat transfer rates and thermal efficiencies. Although higher heat transfer rates have been established with the addition of internals, there is a lack of coherence on the underlying complex physical phenomena such as heat transfer boundary …
Reliability Models For Smartphone Applications, Sonia Meskini, Ali Bou Nassif, Luiz Fernando Capretz
Reliability Models For Smartphone Applications, Sonia Meskini, Ali Bou Nassif, Luiz Fernando Capretz
Electrical and Computer Engineering Publications
Smartphones have become the most used electronic devices. They carry out most of the functionalities of desktops, offering various useful applications that suit the user’s needs. Therefore, instead of the operator, the user has been the main controller of the device and its applications, therefore its reliability has become an emergent requirement. As a first step, based on collected smartphone applications failure data, we investigated and evaluated the efficacy of Software Reliability Growth Models (SRGMs) when applied to these smartphone data in order to check whether they achieve the same accuracy as in the desktop/laptop area. None of the selected …
Polar Ice As An Unconventional Water Resource: Opportunities And Challenges, Zahra Karimidastenaei, Björn Klöve, Mojtaba Sadegh, Ali Torabi Haghighi
Polar Ice As An Unconventional Water Resource: Opportunities And Challenges, Zahra Karimidastenaei, Björn Klöve, Mojtaba Sadegh, Ali Torabi Haghighi
Civil Engineering Faculty Publications and Presentations
Global water resources are under pressure due to increasing population and diminishing conventional water resources caused by global warming. Water scarcity is a daunting global problem which has prompted efforts to find unconventional resources as an appealing substitute for conventional water, particularly in arid and semiarid regions. Ice is one such unconventional water resource, which is available mainly in the Arctic and Antarctic. In this study, opportunities and challenges in iceberg utilization as a source of freshwater were investigated on the basis of a systematic literature review (SLR). A search in three databases (Scopus, Web of Science, and ProQuest) yielded …
Correlations Between Mechanical And Index Properties Of Sandstone From The Central Salt Range, M. Z. Emad, M. U. Khan, S. A. Saki, M. A. Raza, M. U. Tahir
Correlations Between Mechanical And Index Properties Of Sandstone From The Central Salt Range, M. Z. Emad, M. U. Khan, S. A. Saki, M. A. Raza, M. U. Tahir
Mining Engineering Faculty Research & Creative Works
Abstract: A study was conducted to uncover the possible correlations among mechanical and index properties of sandstones from formations of Salt Range area, Punjab, Pakistan. For this purpose, sandstone block samples were collected from seven formations of the Salt Range. The samples were prepared for rock testing according to the guidelines set by International Society of Rock Mechanics (ISRM). Defective samples were discarded and those meeting the ISRM specifications were tested for sonic velocities, dry density, porosity, uniaxial compressive strength, tensile strength and elastic constants. Results obtained were then statistically analyzed to find the predictive relationships. The analysis revealed that …
Protection Of Patient Privacy On Mobile Device Machine Learning, Matthew Nguyen
Protection Of Patient Privacy On Mobile Device Machine Learning, Matthew Nguyen
Cybersecurity Undergraduate Research Showcase
An existing StudentLife Study mobile dataset was evaluated and organized to be applied to different machine learning methods. Different variables like user activity, exercise, sleep, study space, social, and stress levels are optimized to train a model that could predict user stress level. The different machine learning methods would test if both patient data privacy and training efficiency can be ensured.
Cybersecurity Maturity Model Certification (Cmmc) Compliance For Dod Contractors, Sierra Burnett
Cybersecurity Maturity Model Certification (Cmmc) Compliance For Dod Contractors, Sierra Burnett
Cybersecurity Undergraduate Research Showcase
The DoD is currently taking a supply-chain risk management strategy to foster cybersecurity. This unique strategy is often referred to as CMMC which stands for “Cybersecurity Maturity Model Certification”. The approach requires that all the 300,000 DoD contractors acquire third-party authentication that may attain the requirements for the CMMC maturity level suitable to the work they desire to do for the DoD. CMMC typically examines the organization's capability to safeguard Federal Contract Information as well as CUI. It integrates various cybersecurity standards already in place and plots the best practices alongside processes to five maturity levels that range from the …
Risk Management And Biases In How Drivers Respond To Nuisance Flooding, Saige Hill, Juita-Elena (Wie) Yusuf, Burton St. John Iii, Pragati Rawat, Carol Considine
Risk Management And Biases In How Drivers Respond To Nuisance Flooding, Saige Hill, Juita-Elena (Wie) Yusuf, Burton St. John Iii, Pragati Rawat, Carol Considine
School of Public Service Faculty Publications
Nuisance flooding, or recurrent flooding, occurs during high tide and may be exacerbated when combined with other events such as heavy precipitation, strong winds, or storm surge. Sea level rise has contributed to increased frequency and duration of nuisance flooding in low-lying coastal areas and is causing community-specific impacts such as transportation disruption, road closures, compromises to life and property, overwhelmed storm water systems, and infrastructure damage. This chapter focuses on how drivers respond during nuisance flooding events. Specifically, we discuss how drivers in the Hampton Roads region of southeastern coastal Virginia obtain information about road flooding, how they respond, …
Strengthening Of Concrete Deep Beams Using Carbon Fabric Reinforced Cementitious/Geopolymeric Matrix, Nour Mohamed Muhsen Khir Allah
Strengthening Of Concrete Deep Beams Using Carbon Fabric Reinforced Cementitious/Geopolymeric Matrix, Nour Mohamed Muhsen Khir Allah
Theses
This research aimed to examine the effectiveness of using carbon fabric-reinforced matrix (C-FRM) composites to improve the shear response of reinforced concrete (RC) deep beams. Ten RC deep beams with a/h of 1.6 were tested, where a is the shear span and his is the beam depth. Test parameters included the presence of internal shear reinforcement (no shear reinforcement and minimum shear reinforcement), number of C-FRM composite layers (one and two layers), angle of inclination of the second layer of CFRM (90o and 0o with respect to the longitudinal direction of the beam), and type of matrix (cementitious and geopolymer). …
Flutter Suppression By Active Controller Of A Two-Dimensional Wing With A Flap, Abdallah Muhammed Tarabulsi
Flutter Suppression By Active Controller Of A Two-Dimensional Wing With A Flap, Abdallah Muhammed Tarabulsi
Theses
Flutter is a divergent oscillation of an aeroelastic structure, and one of a family of aeroelastic instability phenomena, that results from the interaction of elastic and inertial forces of the structure with the surrounding aerodynamic forces. Airfoil Flutter is important due to its catastrophic effect on the durability and operational safety of the structure. Traditionally, flutter is prevented within an aircraft's flight envelope using passive approaches such as optimizing stiffness distribution, mass balancing, or modifying geometry during the design phase. Although these methods are effective but they led to heavier airfoil designs. On the other hand, active control methods allow …
Material Characterization For Microwave Absorbing And Shielding Applications, Muhammed Shafeeque Kallumottakkal
Material Characterization For Microwave Absorbing And Shielding Applications, Muhammed Shafeeque Kallumottakkal
Theses
The rapid advancement and widespread of microwave and RF-communication systems have contributed to an abundant rise in electromagnetic energy radiation in our living environment. Such an increase in microwave sources is due to the development and advancement in communication techniques (mobile phones, laptops, and antennas for aeronautics or automobile) and electronic warfare in the military field (radar and satellite). To address these concerns, EM absorbing materials are used to ensure public safety and the safety of military operations. Various types of EM absorbing materials made up of composite materials have been produced and studied. This thesis discusses the microwave properties …
Biosensor Devices Based On Graphene And 2d Materials, Suhada Aidrous Poovathy
Biosensor Devices Based On Graphene And 2d Materials, Suhada Aidrous Poovathy
Theses
Nanomaterials offered new improvements and developments to the bio-sensing field due to their unique physical and chemical properties. Unique and exceptional electronic properties, such as the ultrahigh surface-to-volume ratio and the excellent electrical properties of the 2D materials like in graphene, making these materials promising for future smaller and faster electronics, but an extensive amount of research is still needed. This thesis is concerned with the study of the integration of 2D material graphene in the development of sensitive and rapid biosensors. The main objective of this thesis is to understand the features and characteristics of graphene, evaluate the scope …
Numerical Study Of Graphene/Au/Sic Waveguide-Based Surface Plasmon Resonance Sensor, Wei Du, Lucas Miller, Feng Zhao
Numerical Study Of Graphene/Au/Sic Waveguide-Based Surface Plasmon Resonance Sensor, Wei Du, Lucas Miller, Feng Zhao
Electrical and Computer Engineering Faculty Research & Creative Works
A new waveguide-based surface plasmon resonance (SPR) sensor was proposed and investigated by numerical simulation. The sensor consists of a graphene cover layer, a gold (Au) thin film, and a silicon carbide (SiC) waveguide layer on a silicon dioxide/silicon (SiO2 /Si) substrate. The large bandgap energy of SiC allows the sensor to operate in the visible and near-infrared wavelength ranges, which effectively reduces the light absorption in water to improve the sensitivity. The sensor was characterized by comparing the shift of the resonance wavelength peak with change of the refractive index (RI), which mimics the change of analyte concentration …
Extracellular Matrix-Mimetic Hydrogels For Treating Neural Tissue Injury: A Focus On Fibrin, Hyaluronic Acid, And Elastin-Like Polypeptide Hydrogels, Derek W. Nelson, Ryan J. Gilbert
Extracellular Matrix-Mimetic Hydrogels For Treating Neural Tissue Injury: A Focus On Fibrin, Hyaluronic Acid, And Elastin-Like Polypeptide Hydrogels, Derek W. Nelson, Ryan J. Gilbert
Chemical and Biochemical Engineering Faculty Research & Creative Works
Neurological and functional recovery is limited following central nervous system injury and severe injury to the peripheral nervous system. Extracellular matrix (ECM)-mimetic hydrogels are of particular interest as regenerative scaffolds for the injured nervous system as they provide 3D bioactive interfaces that modulate cellular response to the injury environment and provide naturally degradable scaffolding for effective tissue remodeling. In this review, three unique ECM-mimetic hydrogels used in models of neural injury are reviewed: fibrin hydrogels, which rely on a naturally occurring enzymatic gelation, hyaluronic acid hydrogels, which require chemical modification prior to chemical crosslinking, and elastin-like polypeptide (ELP) hydrogels, which …
Experimental Investigation Of Additive Manufacturing Of Continuous Carbon Fiber Composites With Multifunctional Electro-Tensile Properties, Ritesh Ghimire, Frank W. Liou
Experimental Investigation Of Additive Manufacturing Of Continuous Carbon Fiber Composites With Multifunctional Electro-Tensile Properties, Ritesh Ghimire, Frank W. Liou
Mechanical and Aerospace Engineering Faculty Research & Creative Works
Manufacturing processes for monofunctional and multifunctional materials vary depending on the design optimization. Multifunctional continuous carbon fiber composites provide great potential in achieving coupled structural and electrical properties for their applications in aircraft, unmanned aircraft systems, and spacecraft. Proper optimization of tensile and electrical properties offers benefits early in the design and continuous operational safety phases to obtain coupled multifunctional properties. In this paper, fused filament fabrication additive manufacturing (AM) technique was used to fabricate continuous carbon fiber solid laminated composites test coupons. The proposed new method characterizes the electrical conductivity's coupled effects on the tensile properties, including the failure …
Dc Bus Voltage Selection For A Grid-Connected Low-Voltage Dc Residential Nanogrid Using Real Data With Modified Load Profiles, Saeed Habibi, Ramin Rahimi, Mehdi Ferdowsi, Pourya Shamsi
Dc Bus Voltage Selection For A Grid-Connected Low-Voltage Dc Residential Nanogrid Using Real Data With Modified Load Profiles, Saeed Habibi, Ramin Rahimi, Mehdi Ferdowsi, Pourya Shamsi
Electrical and Computer Engineering Faculty Research & Creative Works
This study examines various low voltage levels applied to a direct current residential nanogrid (DC-RNG) with respect to the efficiency and component cost of the system. Due to the significant increase in DC-compatible loads, on-site Photovoltaic (PV) generation, and local battery storage, DC distribution has gained considerable attention in buildings. To provide an accurate evaluation of the DC-RNG's efficiency and component cost, a one-year load profile of a conventional AC-powered house is considered, and AC appliances' load profiles are scaled to their equivalent available DC appliances. Based on the modified load profiles, proper wiring schemes, converters, and protection devices are …
A Review Of Kentucky’S Extended-Weight Hauling Programs, P. Gayle Marks, Jon Wilcoxson, Bryan Gibson, Chris Van Dyke, Andrew Martin, Jennifer Walton, Doug Kreis
A Review Of Kentucky’S Extended-Weight Hauling Programs, P. Gayle Marks, Jon Wilcoxson, Bryan Gibson, Chris Van Dyke, Andrew Martin, Jennifer Walton, Doug Kreis
Kentucky Transportation Center Research Report
Kentucky established its Extended Weight Coal or Coal By-products Haul Road System (EWCHRS) to increase the state’s competitiveness within the coal industry and reduce financial burdens on coal haulers. A new extended-weight haul system for unrefined petroleum products will come online in 2022. To facilitate enforcement of weight limits throughout Kentucky, this report surveys literature on how overweight vehicles affect roads and bridges, describes statutes and regulations governing weight limits in the state, discusses policies and strategies used throughout the US to handle overweight vehicles, and makes recommendations for improving extended-weight policies in Kentucky. It is apparent that pavements and …
Durability Of Concrete Produced With Alternative Supplementary Cementitious Material, Craig Newtson, Brad Weldon, Judit Garcia, Seyedsaleh Mousavinezhad, William Toledo
Durability Of Concrete Produced With Alternative Supplementary Cementitious Material, Craig Newtson, Brad Weldon, Judit Garcia, Seyedsaleh Mousavinezhad, William Toledo
Data
Historically, Class F fly ash has been chosen as a supplementary cementitious material (SCM) in concrete for its ability to mitigate alkali-silica reaction (ASR). However, future availability of fly ash is uncertain because the energy industry has been investing in renewable energy production and removing coal burning generating stations from operation. Consequently, there is a growing need to find new, cost effective and environmentally friendly alternatives to fly ash. This study investigated a locally available natural pozzolan mined from a pumicite deposit near Espanola, NM for its ability to mediate ASR. Concrete and mortar mixtures included SCM contents ranging from …
Standardized 1x6u Cubesat Structure Design, Maximilian H. Brummel
Standardized 1x6u Cubesat Structure Design, Maximilian H. Brummel
Masters Theses
A CubeSat is a small satellite composed of one or more 10cm x 10cm x ~10cm cubes. Sometimes referred to as a “U” as in unit, the cubes can be combined in configurations of 2U, 3U, 6U, and more. CubeSats provide many advantages that larger satellites cannot offer. They are relatively inexpensive and can be fabricated much faster. Small-scale projects that require a fast timeline from conception up to completion are perfect for CubeSats. Furthermore, educational programs use CubeSat projects to teach and prepare students for the satellite industry. Popular configurations for CubeSat are 1U, 3U and 6U where the …
Assessment Of Deteriorated Structural Concrete To Provide Durable Repairs, Theodore Hopwood, Christopher Goff, Sudhir Palle
Assessment Of Deteriorated Structural Concrete To Provide Durable Repairs, Theodore Hopwood, Christopher Goff, Sudhir Palle
Kentucky Transportation Center Research Report
Most of the structural elements on Kentucky bridges are made of reinforced concrete. Many of these elements deteriorate as a result of corrosion of the reinforcing steel caused by carbonation and — primarily — applications of chlorides by the Kentucky Transportation Cabinet (KYTC). Corrosion of reinforcing steel is reviewed along with assessment procedures that leverage nondestructive evaluation (NDE) methods and related laboratory and field tests. Several maintenance procedures are discussed, including the application of sealers and coatings, patch and major concrete repairs, and electrochemical methods. Incorporating NDE and test results into maintenance procedure selection is discussed. Recommendations are provided on …