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Articles 1771 - 1800 of 2359
Full-Text Articles in Engineering
Listen, Allison Marsh
Spotlight On Usc: Mechanical Engineering, Allison Marsh
Spotlight On Usc: Mechanical Engineering, Allison Marsh
Section 3: Imaging the Fast Moving
No abstract provided.
Photographic Evidence, Allison Marsh
Photographic Evidence, Allison Marsh
Section 3: Imaging the Fast Moving
No abstract provided.
Spotlight On Usc: South Carolina Institute For Anthropology And Archaeology, Allison Marsh
Spotlight On Usc: South Carolina Institute For Anthropology And Archaeology, Allison Marsh
Section 4: Imaging the Concealed
No abstract provided.
Influencing Art, Allison Marsh
Influencing Art, Allison Marsh
Section 3: Imaging the Fast Moving
No abstract provided.
Mapping The Ocean Frontier, Allison Marsh
Mapping The Ocean Frontier, Allison Marsh
Section 4: Imaging the Concealed
No abstract provided.
Seeing With Sound, Allison Marsh
Seeing With Sound, Allison Marsh
Section 4: Imaging the Concealed
No abstract provided.
Fact Or Fiction?, Allison Marsh
Fact Or Fiction?, Allison Marsh
Section 5: Imaging at the Nano Scale
No abstract provided.
World Ocean Floor, Courtesy Of The Library Of Congress, Allison Marsh
World Ocean Floor, Courtesy Of The Library Of Congress, Allison Marsh
Section 4: Imaging the Concealed
No abstract provided.
Spotlight On Usc: Department Of Art, Allison Marsh
Spotlight On Usc: Department Of Art, Allison Marsh
Section 5: Imaging at the Nano Scale
No abstract provided.
Usc's Nanocenter, Allison Marsh
Usc's Nanocenter, Allison Marsh
Section 5: Imaging at the Nano Scale
No abstract provided.
Art Versus Image, Allison Marsh
Art Versus Image, Allison Marsh
Section 5: Imaging at the Nano Scale
No abstract provided.
Marie Tharp At Her Drafting Table, Courtesy Of The Lamont-Doherty Earth Observatory, Earth Institute, Columbia University, Allison Marsh
Marie Tharp At Her Drafting Table, Courtesy Of The Lamont-Doherty Earth Observatory, Earth Institute, Columbia University, Allison Marsh
Section 4: Imaging the Concealed
No abstract provided.
Nano Imaging, Allison Marsh
Nano Imaging, Allison Marsh
Section 5: Imaging at the Nano Scale
No abstract provided.
What Is Nanotechnology?, Allison Marsh
What Is Nanotechnology?, Allison Marsh
Section 5: Imaging at the Nano Scale
No abstract provided.
Nanotechnology In Everyday Life, Allison Marsh
Nanotechnology In Everyday Life, Allison Marsh
Section 5: Imaging at the Nano Scale
No abstract provided.
Choosing An Instrument, Allison Marsh
Choosing An Instrument, Allison Marsh
Section 5: Imaging at the Nano Scale
No abstract provided.
Conclusion Panel, Allison Marsh
Quantifying Cell-To-Cell Variations In Lithium Ion Batteries, Shriram Santhanagopalan, Ralph E. White
Quantifying Cell-To-Cell Variations In Lithium Ion Batteries, Shriram Santhanagopalan, Ralph E. White
Faculty Publications
Lithium ion batteries have conventionally been manufactured in small capacities but large volumes for consumer electronics applications. More recently, the industry has seen a surge in the individual cell capacities, as well as the number of cells used to build modules and packs. Reducing cell-to-cell and lot-to-lot variations has been identified as one of the major means to reduce the rejection rate when building the packs as well as to improve pack durability. The tight quality control measures have been passed on from the pack manufactures to the companies building the individual cells and in turn to the components. This …
Capturing Motion, Allison Marsh
Capturing Motion, Allison Marsh
Section 3: Imaging the Fast Moving
No abstract provided.
Leaving The Lecture Hall: Conducting Hf/E Outside The Classroom, C. B. Fausset, K. R. Bujak, K. A. Kline, Jenay Beer, C.-A. Smarr, A. E. Adams, S. E. Mcbride, J. S. Burnett
Leaving The Lecture Hall: Conducting Hf/E Outside The Classroom, C. B. Fausset, K. R. Bujak, K. A. Kline, Jenay Beer, C.-A. Smarr, A. E. Adams, S. E. Mcbride, J. S. Burnett
Faculty Publications
Georgia Tech HF/E students initiated and managed a multisemester project to experience the nuances of conducting HF/E outside the classroom setting. This article focuses on the lessons learned beyond the classroom: project management, team coordination, communication with non-HF/E team members, application of research methods, and integration of data to prioritize and guide design changes. The goal of this article is to help guide other HF/E students and educators when implementing similar projects by providing the lessons we learned from this experience.
Investigation Of Carbon Corrosion Resistance Of Cnt Containing Electrode, Diana Larrabee, William A. Rigdon, Eli Mcpherson, Joshua Sightler, Xinyu Huang
Investigation Of Carbon Corrosion Resistance Of Cnt Containing Electrode, Diana Larrabee, William A. Rigdon, Eli Mcpherson, Joshua Sightler, Xinyu Huang
Faculty Publications
Carbon support corrosion is one of the major degradation mechanisms of polymer electrolyte membrane (PEM) fuel cell. Carbon oxidation occurs in PEM electrode and is accelerated at high potential created by adverse operating conditions and improper distribution of reactants and products [1, 2, 3]. Carbon corrosion can lead to the thinning of the electrode layer and severe performance degradation. The detailed mechanisms of carbon support corrosion induced performance loss are still not fully understood; it is believed that the following events contribute to the decay: (1) structural collapse of the porous electrode due to the loss of carbon; (2) carbon …
Characterization Of Deep Levels In N-Type And Semi-Insulating 4h-Sic Epitaxial Layers By Thermally Stimulated Current Spectroscopy, P. G. Muzykov, Ramesh Madhu Krishna, K. C. Mandal
Characterization Of Deep Levels In N-Type And Semi-Insulating 4h-Sic Epitaxial Layers By Thermally Stimulated Current Spectroscopy, P. G. Muzykov, Ramesh Madhu Krishna, K. C. Mandal
Faculty Publications
No abstract provided.
Application Of Electrospinning Technique In The Fabrication Of A Composite Electrode For Pemfc, Joshua Sightler, Eli Mcpherson, William A. Rigdon, Xinyu Huang
Application Of Electrospinning Technique In The Fabrication Of A Composite Electrode For Pemfc, Joshua Sightler, Eli Mcpherson, William A. Rigdon, Xinyu Huang
Faculty Publications
The Pt/C catalysts were mixed with carbon nanotube (CNT), Nafion™ dispersion and a fiber former, polymer poly-acrylic acid (PAA), to form an ink. The ink was deposited onto aluminum foil attached to a rotating collector via an electrospinning process. The ink composition, mixing procedure, and the E-spin parameters were studied for producing a uniform nanofiber mat on the aluminum substrate. The fiber-mat containing active catalyst ingredients was heat treated and decal transferred onto a Nafion membrane to form a membrane electrode assembly (MEA).
Dual Mode Sensing With Low-Profile Piezoelectric Thin Wafer Sensors For Steel Bridge Crack Detection And Diagnosis, Lingyu Yu, S. Momeni, V. Godinez, Victor Giurgiutiu, Paul Ziehl, J. Yu
Dual Mode Sensing With Low-Profile Piezoelectric Thin Wafer Sensors For Steel Bridge Crack Detection And Diagnosis, Lingyu Yu, S. Momeni, V. Godinez, Victor Giurgiutiu, Paul Ziehl, J. Yu
Faculty Publications
Monitoring of fatigue cracking in steel bridges is of high interest to many bridge owners and agencies. Due to the variety of deterioration sources and locations of bridge defects, there is currently no single method that can detect and address the potential sources globally. In this paper, we presented a dual mode sensing methodology integrating acoustic emission and ultrasonic wave inspection based on the use of low-profile piezoelectric wafer active sensors (PWAS). After introducing the research background and piezoelectric sensing principles, PWAS crack detection in passive acoustic emission mode is first presented. Their acoustic emission detection capability has been validated …
A Multiagent Energy Management Control System For Commercial & Industrial Applications, Tyler Wayne Price
A Multiagent Energy Management Control System For Commercial & Industrial Applications, Tyler Wayne Price
Theses and Dissertations
Commercial and industrial customers have increasingly adopted fully-automated demand response (auto-DR) as part of their energy management control strategy to mitigate the effects of rising electricity costs. Some of these customers have also contracted with their power provider to permit voluntary curtailment of power consumption to be negotiated by a human operator. Even still, at the customer-side there are needs to maximize cost savings and automate decision making, and at the provider-side there are needs to reduce peaking demand and demand volatility. This thesis describes a centralized multiagent approach that automatically negotiates demand curtailment with a power provider while making …
Aerosol-Assisted Synthesis Of Monodisperse Single-Crystalline Α-Cristobalite Nanospheres, Xingmao Jiang, Lihong Bao, Yung-Sung Cheng, Darren R. Dunphy, Xiaodong Li, C. Jeffrey Brinker
Aerosol-Assisted Synthesis Of Monodisperse Single-Crystalline Α-Cristobalite Nanospheres, Xingmao Jiang, Lihong Bao, Yung-Sung Cheng, Darren R. Dunphy, Xiaodong Li, C. Jeffrey Brinker
Faculty Publications
Monodisperse single-crystalline α-cristobalite nanospheres have been synthesized by hydrocarbon-pyrolysis-induced carbon deposition on amorphous silica aerosol nanoparticles, devitrification of the coated silica at high temperature, and subsequent carbon removal by oxidation. The nanosphere size can be well controlled by tuning the size of the colloidal silica precursor. Uniform, high-purity nanocrystalline α-cristobalite is important for catalysis, nanocomposites, advanced polishing, and understanding silica nanotoxicology.
One-Step Infiltration Of Mixed Conducting Electrocatalysts For Reducing Cathode Polarization Of A Commercial Cathode-Supported Sofc, Nansheng Xu, Xue Li, Xuan Zhao, Hailei Zhao, Kevin Huang
One-Step Infiltration Of Mixed Conducting Electrocatalysts For Reducing Cathode Polarization Of A Commercial Cathode-Supported Sofc, Nansheng Xu, Xue Li, Xuan Zhao, Hailei Zhao, Kevin Huang
Faculty Publications
Infiltrating fine-grained electrocatalyst particles of either ion conducting or mixed electron and ion conducting (MEIC) material into a ceramic porous electrode scaffold has proven a very effective way to improve electrode performance for low to intermediate temperature solid oxide fuel cells (SOFCs). We report here one-step infiltration of MEIC fine particles, La0.6Sr0.4CoO3-δ (LSCo) and SrCo0.8Fe0.2O3-δ (SCF), into a commercial cathode substrate. A comparative study shows that the cathode polarization can be considerably reduced by a factor of 17 to 28 and 28 to 49 from 1000 to 700 ³C by …
Giant Magnetostriction In Annealed Co1-XFeX Thin-Films, Dwight Hunter, Will Osborn, Ke Wang, Nataliya Kazantseva, Jason R. Hattrick-Simpers, Richard Suchoski, Ryota Takahashi, Marcus L. Young, Apurva Mehta, Leonid A. Bendersky, Same E. Lofland, Manfred Wuttig, Ichiro Takeuchi
Giant Magnetostriction In Annealed Co1-XFeX Thin-Films, Dwight Hunter, Will Osborn, Ke Wang, Nataliya Kazantseva, Jason R. Hattrick-Simpers, Richard Suchoski, Ryota Takahashi, Marcus L. Young, Apurva Mehta, Leonid A. Bendersky, Same E. Lofland, Manfred Wuttig, Ichiro Takeuchi
Faculty Publications
Chemical and structural heterogeneity and the resulting interaction of coexisting phases can lead to extraordinary behaviours in oxides, as observed in piezoelectric materials at morphotropic phase boundaries and relaxor ferroelectrics. However, such phenomena are rare in metallic alloys. Here we show that, by tuning the presence of structural heterogeneity in textured Co1−xFex thin films, effective magnetostriction λeff as large as 260 p.p.m. can be achieved at low-saturation field of ~10 mT. Assuming λ100 is the dominant component, this number translates to an upper limit of magnetostriction ofλ100≈5λeff >1,000 p.p.m. Microstructural analyses …
A Novel Solid Oxide Redox Flow Battery For Grid Energy Storage, Nansheng Xu, Xue Li, Xuan Zhao, John B. Goodenough, Kevin Huang
A Novel Solid Oxide Redox Flow Battery For Grid Energy Storage, Nansheng Xu, Xue Li, Xuan Zhao, John B. Goodenough, Kevin Huang
Faculty Publications
In this work we report proof-of-concept of a novel redox flow battery consisting of a solid oxide electrochemical cell (SOEC) integrated with a redox-cycle unit. The charge/discharge characteristics were explicitly observed by operating between fuel cell and electrolysis modes of the SOEC along with “in-battery” generation and storage of H2 realized by an in situ closed-loop reversible steam-metal reaction in the redox-cycle unit. With Fe/FeO as the redox materials, the new storage battery can produce an energy capacity of 348 Wh/kg-Fe and round-trip efficiency of 91.5% over twenty stable charge/discharge cycles. This excellent performance combined with robustness, environmental friendliness …