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Articles 23941 - 23970 of 34331
Full-Text Articles in Entire DC Network
Evaluation Of Autonomous Robotic Milling Methodology For Natural Tooth-Shaped Implants Based On Sko Optimization, Yongki Yoon
Evaluation Of Autonomous Robotic Milling Methodology For Natural Tooth-Shaped Implants Based On Sko Optimization, Yongki Yoon
Mechanical & Aerospace Engineering Theses & Dissertations
Robotic surgery is one of the most demanding and challenging applications in the field of automatic control. One of the conventional surgeries, the dental implantation, is the standard methodology to place the artificial tooth root composed of titanium material into the upper or lower jawbone. During the dental implant surgery, mechanical removal of the bone material is the most critical procedure because it may affect the patient's safety including damage to the mandibular canal nerve and/or piercing the maxillary sinus. With this problem, even though short term survival rates are greater than 95%, long term success rate of the surgery …
Production And Characterization Of Biodegradable Nanofibers Via Forcespinning™ Technology, Zachary T. Mceachin
Production And Characterization Of Biodegradable Nanofibers Via Forcespinning™ Technology, Zachary T. Mceachin
Theses and Dissertations - UTB/UTPA
Among the myriad of methods for polymer nanofiber production, there are only a few methods that can produce submicron range fibers in bulk from melt or solution samples. The Forcespinning™ method allows a substantial increase in sample yield; this greatly reduces the time needed to produce bulk quantities of fibers which may be critical in many fields of research and industry, in particularly in fields relating to biopolymers. The aim of the first study was to utilize this method to form non-woven mats of polycaprolactone (PCL) nanofibers and to quantitatively analyze the production and characterization of the produced fibers. The …
Performance Optimization Over Wireless Links With Operating Constraints, Shiny Abraham
Performance Optimization Over Wireless Links With Operating Constraints, Shiny Abraham
Electrical & Computer Engineering Theses & Dissertations
Wireless communication is one of the most active areas of technological innovations and groundbreaking research ranging from simple cellular phones to highly complex military monitoring devices. The emergence of radios with cognitive capabilities like software defined radios has revolutionized modern communication systems by providing transceivers which can vary their output waveforms as well as their demodulation methods. This adaptability plays a pivotal role in efficient utilization of radio spectrum in an intelligent way while simultaneously not interfering with other radio devices operating on the same frequency band. Thus, it is safe to say that current and future wireless systems and …
Computational Modeling Of Functionalized Carbon Nanotubes, Nathaniel Lee Miller
Computational Modeling Of Functionalized Carbon Nanotubes, Nathaniel Lee Miller
Theses and Dissertations
Ab initio self-consistent field (SCF) molecular orbital calculations were performed employing various basis sets to computationally predict methods to functionalize and solubilize carbon nanotubes. The structure and Restricted Hartree-Fock (RHF) or “total” energies of functionalized nanotubes of various configurations were determined via theoretical calculations. Total energies were used to determine preferences for adsorption on nanotube sur-faces. Various diameter carbon nanotubes (CNTs) were tested to determine where a transition from a non-wrapping to a wrapping approach was found likely to occur as a function of diameter. Further refinements to this method could be used to explore additional interactions as nanotube diameter …
Towards Omni-Tomography -- Grand Fusion Of Multiple Modalities For Simultaneous Interior Tomography, Ge Wang, Jie Zhang, Hao Gao, Victor Weir, Hengyong Yu, Wenxiang Cong, Xiaochen Xu, Haiou Shen, James Bennett, Mark Furth, Yue Wang, Michael Vannier
Towards Omni-Tomography -- Grand Fusion Of Multiple Modalities For Simultaneous Interior Tomography, Ge Wang, Jie Zhang, Hao Gao, Victor Weir, Hengyong Yu, Wenxiang Cong, Xiaochen Xu, Haiou Shen, James Bennett, Mark Furth, Yue Wang, Michael Vannier
Radiology Faculty Publications
We recently elevated interior tomography from its origin in computed tomography (CT) to a general tomographic principle, and proved its validity for other tomographic modalities including SPECT, MRI, and others. Here we propose "omni-tomography", a novel concept for the grand fusion of multiple tomographic modalities for simultaneous data acquisition in a region of interest (ROI). Omni-tomography can be instrumental when physiological processes under investigation are multi-dimensional, multi-scale, multi-temporal and multi-parametric. Both preclinical and clinical studies now depend on in vivo tomography, often requiring separate evaluations by different imaging modalities. Over the past decade, two approaches have been used for multimodality …
Novel Soft Surfaces With Interesting Surface And Bulk Morphology, Souvik Chakrabarty
Novel Soft Surfaces With Interesting Surface And Bulk Morphology, Souvik Chakrabarty
Theses and Dissertations
The goal of this research is to cover a broad set of scientific investigations of elastomeric materials based on polydimethylsiloxane (PDMS) and poly((3,3,3-trifluoroethoxymethyl)methyloxetane) diol. The scope of study covers five areas, well correlated with each other. The first study investigates the near surface morphology of condensation cured PDMS as a function of increasing the amount of siliceous phase. The appearance, disappearance and reappearance of untreated fumed silica nanoparticles at the PDMS near surface and their correlation with the volume fraction of siliceous phase have been studied. This research with PDMS nanocomposites has led to the development of an alternative route …
The Structural Characterization Of Ga 2o 3-Na 2o-Cao-Zno-Sio 2 Bioactive Glasses, T. J. Keenan, A. W. Wren, A. Coughlan, M. M. Hall, Mark R. Towler
The Structural Characterization Of Ga 2o 3-Na 2o-Cao-Zno-Sio 2 Bioactive Glasses, T. J. Keenan, A. W. Wren, A. Coughlan, M. M. Hall, Mark R. Towler
Chemical and Biochemical Engineering Faculty Research & Creative Works
The characterization of bioactive glasses in which zinc (Zn) has been incrementally replaced by gallium (Ga). © 2012 IEEE.
Increasing The Quantity Of Silver In Zinc-Based Glass Polyalkenoate Cement: Is There An Improvement In Antibacterial Efficacy?, A. Coughlan, S. M. Breed, C. Ashraf, J. A. Cardinale, M. M. Hall, Mark R. Towler
Increasing The Quantity Of Silver In Zinc-Based Glass Polyalkenoate Cement: Is There An Improvement In Antibacterial Efficacy?, A. Coughlan, S. M. Breed, C. Ashraf, J. A. Cardinale, M. M. Hall, Mark R. Towler
Chemical and Biochemical Engineering Faculty Research & Creative Works
Bone cements should have the ability to chemically bond to both bone and surgical metals, exhibit no chemical or thermal necrosis, and have no significant shrinkage or exotherm upon setting. Taking these properties into consideration, glass polyalkenoate cements (GPCs) have potential as bone cements. GPCs are formed by the reaction between an ion-leachable glass and an aqueous solution of polyacrylic acid (PAA) [1] and have proven antibacterial and cariostatic properties [2], which are related to their ability to release beneficial amounts of ions over time [3, 4]. The GPCs can be formulated to release ions that can have a therapeutic …
Reconfigurable Antenna And Rf Circuits Using Multi-Layer Stretchable Conductors, Riaz Ahmed -. Liyakath
Reconfigurable Antenna And Rf Circuits Using Multi-Layer Stretchable Conductors, Riaz Ahmed -. Liyakath
USF Tampa Graduate Theses and Dissertations
The growth of flexible electronics industry has given rise to light-weight, flexible devices which have a wide range of applications such as wearable electronics, flexible sensors, conformal antennas, bio-medical applications, solar cells etc. Though several techniques exist to fabricate flexible devices, the limiting factors have been durability, cost and complexity of the approach. In this research, the focus has been on developing stretchable (flexible) conductors using a multi-layer structure of metal and conductive rubber. The stretchable conductors developed using this approach do not lose electrical connection when subjected to large strains up to 25%. Also, the conductivity of the conductive …
Preparation And Characterization Of Prussian Blue Modified Nanoelectrode, Wei Wang, Bao-Fa Su, Dong-Ping Zhan
Preparation And Characterization Of Prussian Blue Modified Nanoelectrode, Wei Wang, Bao-Fa Su, Dong-Ping Zhan
Journal of Electrochemistry
The Pt nanoelectrodes were fabricated by using a laser-based pipet puller and the recessed nanoelectrodes were prepared by etching of disk Pt nanoelectrodes wtih high frequency ac voltage. Prussian blue microcrystal was synthesized electrochemically on the both disk and recessed Pt nanoelectrodes. The strength of mechanical adhesion for the Prussian blue microcrystal on the nanoelectrode was enhanced. A novel method for the controllable synthesis of single particle is proposed, which has potential applications in modified electrodes and single particle electrocatalysis.
On The Molecular Mechanism Of Electron Transfer Of Cytochrome C Modulated By Gold Nanoparticles In Nano-Sandwich Architecture, Shou-Rui Lin, Li-Xu Wang, Xiu-E Jiang, Li-Ping Guo
On The Molecular Mechanism Of Electron Transfer Of Cytochrome C Modulated By Gold Nanoparticles In Nano-Sandwich Architecture, Shou-Rui Lin, Li-Xu Wang, Xiu-E Jiang, Li-Ping Guo
Journal of Electrochemistry
The effects of adsorbed gold nanoparticles on the surface-enhanced infrared absorption (SEIRA) difference spectra of redox-induced cytochrome (Cyt) c in AuNPs/Cyt c/Au sandwich architecture were monitored by SEIRA spectroscopy. The results indicated that the intensity of SEIRA difference spectrum for the vibration of the heme was significantly increased due to the adsorption of gold nanoparticles on the Cyt c. This was induced by the electron transfer between the heme and the gold nanoparticles, which also promoted electron transfer of adsorbed protein. This study suggested a new technique for optimizing the electrochemical property of adsorbed protein.
Protonization Of Amino Functional Groups Confined In Nanochannels, Hong-Li Gao, Kai-Lin Zhou, Chen Wang, Su-Juan Li, Hui Zhang, Xing-Hua Xia
Protonization Of Amino Functional Groups Confined In Nanochannels, Hong-Li Gao, Kai-Lin Zhou, Chen Wang, Su-Juan Li, Hui Zhang, Xing-Hua Xia
Journal of Electrochemistry
Protonization process is the key step of acid-base reaction and occurs in many biological processes. Study of the protonization process of molecules and/or functional groups in confined conditions would assist understanding in the acid-base theory and confinement effect of biomolecules. In this paper, we developed a novel approach to study protonization of functional groups in porous anodic alumina array nanochannels by measuring the flux of electrochemical active probes using an Au film electrochemical detector sputtered at the end of the nanochannels. The protonization status of the surface functional groups in nanochannels can change the surface charges and further modulate the …
An Overview Of Electrode Materials In Microbial Fuel Cells, Su-Qin Ci, Na Wu, Zhen-Hai Wen, Jing-Hong Li
An Overview Of Electrode Materials In Microbial Fuel Cells, Su-Qin Ci, Na Wu, Zhen-Hai Wen, Jing-Hong Li
Journal of Electrochemistry
Microbial fuel cells (MFCs) are devices that can directly convert organic chemical energy into electrical energy with microbial as catalysts. MFCs are a promising bio-electrochemical system with the potential to degrade organic sewage and produce electricity. This article supplies a critical and comprehensive review for the electrode materials concerning about anode and cathode in MFCs, including the fabrications, functional modifications and surface constructions of electrode materials, as well as their applications in MFCs. Additionally, the existing problems of electrode materials in current MFCs have been demonstrated in order to provide the guideline for exploring the next-generation electrode materials for MFCs.
A Systems Engineering Approach To The Design And Integration Of Microstrip Antennas With Wearable Wireless Devices, Daniel Gilbert Rucker
A Systems Engineering Approach To The Design And Integration Of Microstrip Antennas With Wearable Wireless Devices, Daniel Gilbert Rucker
Theses and Dissertations
Modern wireless systems for implantable and wearable Body Area Network (BAN) applications have reached an advanced stage of design and development not possible in previous generations. Systems engineering techniques allow for modern wireless devices to be developed in a top-down approach to meet the necessary design requirements while utilizing modular architectures. A modular systems architecture is developed to form a platform for BAN systems design. The BAN systems architecture defines the requirements, physical architecture, and operational architecture. The antenna component of the system is researched in detail and prototypes are developed to meet the requirements of implantable and wearable BAN …
Multiple Molecule Effects On The Cooperativity Of Protein Folding Transitions In Simulations, Jacob I. Lewis, Devin J. Moss, Thomas A. Knotts Iv
Multiple Molecule Effects On The Cooperativity Of Protein Folding Transitions In Simulations, Jacob I. Lewis, Devin J. Moss, Thomas A. Knotts Iv
Faculty Publications
Though molecular simulation of proteins has made notable contributions to the study of protein folding and kinetics, disagreement between simulation and experiment still exists. One of the criticisms levied against simulation is its failure to reproduce cooperative protein folding transitions. This weakness has been attributed to many factors such as a lack of polarizability and adequate capturing of solvent effects. This work, however, investigates how increasing the number of proteins simulated simultaneously can affect the cooperativity of folding transitions — a topic that has received little attention previously. Two proteins are studied in this work: phage T4 lysozyme (Protein Data …
Comprehensive Solution To Scattering By Bianisotropic Objects Of Arbitrary Shape, Chong Mei, Moamer Hasanovic, Jay K. Lee, Ercument Arvas
Comprehensive Solution To Scattering By Bianisotropic Objects Of Arbitrary Shape, Chong Mei, Moamer Hasanovic, Jay K. Lee, Ercument Arvas
Electrical Engineering and Computer Science - All Scholarship
This paper presents a method of moments (MoM) solution for the problems of electromagnetic scattering by inhomogeneous three- dimensional bianisotropic scatterers of any shape. The electromagnetic response of bianisotropy has been described by the constitutive relations of the most general form composed of four 3 X 3 matrices or tensors. The volume equivalence principle is used to obtain a set of mixed potential formulations for a proper description of the original scattering problem. Here, the total fields are separated into the incident fields and the scattered fields. The scattered fields are related to the electric and magnetic potentials which are …
Automated Tongue Feature Extraction For Zheng Classification In Traditional Chinese Medicine, Ratchadaporn Kanawong, Tayo Obafemi-Ajayi, Tao Ma, Dong Xu, Shao Li, Ye Duan
Automated Tongue Feature Extraction For Zheng Classification In Traditional Chinese Medicine, Ratchadaporn Kanawong, Tayo Obafemi-Ajayi, Tao Ma, Dong Xu, Shao Li, Ye Duan
Electrical and Computer Engineering Faculty Research & Creative Works
ZHENG, Traditional Chinese Medicine syndrome, is an integral and essential part of Traditional Chinese Medicine theory. It defines the theoretical abstraction of the symptom profiles of individual patients and thus, used as a guideline in disease classification in Chinese medicine. For example, patients suffering from gastritis may be classified as Cold or Hot ZHENG, whereas patients with different diseases may be classified under the same ZHENG. Tongue appearance is a valuable diagnostic tool for determining ZHENG in patients. In this paper, we explore new modalities for the clinical characterization of ZHENG using various supervised machine learning algorithms. We propose a …
Hierarchy Of Supramolecular Synthons In The Of Design Multi-Component Crystals, Padmini Kavuru
Hierarchy Of Supramolecular Synthons In The Of Design Multi-Component Crystals, Padmini Kavuru
USF Tampa Graduate Theses and Dissertations
Most of the biological systems in nature are sustained by molecular self-assemblies which are the finest examples of supramolecular architectures. Non-covalent interactions are key concepts which govern these molecular assemblies. Inspired by these examples crystal engineering emerged as an important tool in supramolecular chemistry which aids in the invention of new molecular structures with desired properties. Understanding of how the molecules interact at the molecular levels enables one to rationally design novel solid forms with modulated physicochemical properties. This feature of crystal engineering has heightened its position in materials chemistry and is currently one of the most well studied fields …
International Junior Researcher And Engineer Workshop On Hydraulic Structures Session 5, Mohanad Khodier, Adam Witt, Maria Trujillo, Iordanis Moustakidis, Francois Rulot
International Junior Researcher And Engineer Workshop On Hydraulic Structures Session 5, Mohanad Khodier, Adam Witt, Maria Trujillo, Iordanis Moustakidis, Francois Rulot
International Junior Researcher and Engineer Workshop on Hydraulic Structures
No abstract provided.
Single-Molecule Tools Elucidate H2a.Z Nucleosome Composition, Jiji Chen, Andrew Miller, Ann L. Kirchmaier, Joseph M.K. Irudayaraj
Single-Molecule Tools Elucidate H2a.Z Nucleosome Composition, Jiji Chen, Andrew Miller, Ann L. Kirchmaier, Joseph M.K. Irudayaraj
Birck and NCN Publications
Although distinct epigenetic marks correlate with different chromatin states, how they are integrated within single nucleosomes to generate combinatorial signals remains largely unknown. We report the successful implementation of single molecule tools constituting fluorescence correlation spectroscopy (FCS), pulse interleave excitation-based Forster resonance energy transfer (PIE-FRET) and fluorescence lifetime imaging-based FRET (FLIM-FRET) to elucidate the composition of single nucleosomes containing histone variant H2A.Z (Htz1p in yeast) in vitro and in vivo. We demonstrate that yeast nucleosomes containing Htz1p are primarily composed of H4 K12ac and H3 K4me3 but not H3 K36me3 and that these patterns are conserved in mammalian cells. Quantification …
Ethanol And Anaerobic Conditions Reversibly Inhibit Commercial Cellulase Activity In Thermophilic Simultaneous Saccharification And Fermentation (Tssf), Kara K. Podkaminer, William R. Kenealy, Christopher D. Herring, David A. Hogsett, Lee R. Lynd
Ethanol And Anaerobic Conditions Reversibly Inhibit Commercial Cellulase Activity In Thermophilic Simultaneous Saccharification And Fermentation (Tssf), Kara K. Podkaminer, William R. Kenealy, Christopher D. Herring, David A. Hogsett, Lee R. Lynd
Dartmouth Scholarship
A previously developed mathematical model of low solids thermophilic simultaneous saccharification and fermentation (tSSF) with Avicel was unable to predict performance at high solids using a commercial cellulase preparation (Spezyme CP) and the high ethanol yield Thermoanaerobacterium saccharolyticum strain ALK2. The observed hydrolysis proceeded more slowly than predicted at solids concentrations greater than 50 g/L Avicel. Factors responsible for this inaccuracy were investigated in this study.
Clay Minerals For Nanocomposites And Biotechnology: Surface Modification, Dynamics And Responses To Stimuli, Hendrik Heinz
Clay Minerals For Nanocomposites And Biotechnology: Surface Modification, Dynamics And Responses To Stimuli, Hendrik Heinz
College of Polymer Science and Polymer Engineering
Clay minerals find a wide range of application in composites, paints, drilling liquids, cosmetics, and medicine. This article reviews chemical and physical properties of natural and organically modified clay minerals to understand the nanometre-scale structure, surface characteristics, and application in functional materials. The relation between fundamental properties and materials design is emphasized and illustrated by examples. The discussion comprises the following: an overview; surface structure and cation density; solubility and solubility reversal by surface modification; the degree of covalent and ionic bonding represented by atomic charges; the distribution of metal substitution sites; measurements and simulations of interfacial properties at the …
The Challenges And Implications For Energy Education, Patrick A. Tebbe
The Challenges And Implications For Energy Education, Patrick A. Tebbe
Mechanical and Civil Engineering Department Publications
In March 2011, the Fukushima Daiichi Nuclear Power Station in Japan was hit by twin natural disasters of a 9.0 earthquake and a tsunami more than 10 meters high. The combination forced a shut down of the reactor and severed externally provided power. Backup generators and batteries, which at first functioned normally, were swamped and disabled by the tsunami waters. The subsequent loss of reactor core cooling led to rising temperatures that ultimately resulted in a partial melting of the fuel rods and several hydrogen explosions (produced by a steam-zirconium reaction). Eventually, the situation was brought under control, but not …
Novel Platform Development Using Assembly Of Carbon Nanotube, Nanogold And Immobilized Rna Capture Element For Rapid, Selective Sensing Of Bacteria, Elizabeth I. Maurer, Kristen K. Comfort, Saber M. Hussain, John J. Schlager, Sharmila M. Mukhopadhyay
Novel Platform Development Using Assembly Of Carbon Nanotube, Nanogold And Immobilized Rna Capture Element For Rapid, Selective Sensing Of Bacteria, Elizabeth I. Maurer, Kristen K. Comfort, Saber M. Hussain, John J. Schlager, Sharmila M. Mukhopadhyay
Mechanical and Materials Engineering Faculty Publications
This study examines the creation of a nano-featured biosensor platform designed for the rapid and selective detection of the bacterium Escherichia coli. The foundation of this sensor is carbon nanotubes decorated with gold nanoparticles that are modified with a specific, surface adherent ribonucleiuc acid (RNA) sequence element. The multi-step sensor assembly was accomplished by growing carbon nanotubes on a graphite substrate, the direct synthesis of gold nanoparticles on the nanotube surface, and the attachment of thiolated RNA to the bound nanoparticles. The application of the compounded nano-materials for sensor development has the distinct advantage of retaining the electrical behavior …
Common-Path Endoscopic Optical Coherence Tomography Application To Human Internal Organs Detection, Yanjun Li, Yinan Zhang, Xinwei Lan, Hai Xiao
Common-Path Endoscopic Optical Coherence Tomography Application To Human Internal Organs Detection, Yanjun Li, Yinan Zhang, Xinwei Lan, Hai Xiao
Electrical and Computer Engineering Faculty Research & Creative Works
Due to the small volume of incipient Pathological Cells, the conventional imaging methods cannot effectively diagnose early-stage cytopathic effect. Since the spatial resolution of optical coherence tomography (OCT) can reach the magnitude of micron, and if OCT probe possesses the characteristic of small fabric and nice flexibility in order to easily enter human body, OCT probe can detect the cytopathic effect in a very early-stage. So, this article first introduces some existent common-path OCT system and then compares the advantages and the disadvantages of each CP-EOCT. Finally, this article mainly researches on a new common-path Endoscopic OCT (CP-EOCT) which possesses …
Traffic Signal Optimization Using Ant Colony Algorithm, David Renfrew, Xiao-Hua Yu
Traffic Signal Optimization Using Ant Colony Algorithm, David Renfrew, Xiao-Hua Yu
Electrical Engineering
Traffic signal control is an effective way to improve the efficiency of traffic networks and reduce users’ delays. Ant Colony Optimization (ACO) is a meta-heuristic algorithm based on the behavior of ant colonies searching for food. ACO has successfully been employed to solve many complicated combinatorial optimization problems and its stochastic and decentralized nature fits well with traffic networks. This research investigates the application of the ant colony algorithm to minimize user delay at traffic intersections. Various ACO algorithms are discussed and a rolling horizon approach is also employed to achieve real-time adaptive control. Computer simulation results show that this …
Laser-Based Spectroscopy And Spectrometry, Xiangnan He
Laser-Based Spectroscopy And Spectrometry, Xiangnan He
Department of Electrical and Computer Engineering: Dissertations, Theses, and Student Research
Laser-based spectroscopy and spectrometry were extensively investigated in nanoscience, materials science, biomedical science, and etc. Different lasers with wavelengths from ultraviolet to infrared, and with duration from continuous-wave (CW) to femtoseconds have been employed in various spectroscopic techniques to investigate the properties of materials and nanostructures. However, the sensitivity, spectral resolution, and spatial resolution of these techniques still need to be improved to better serve the purposes of detecting and analyzing various materials. The objective of the research in this dissertation is to improve the sensitivity, spectral resolution, and spatial resolution of different laser-based spectroscopy and spectrometry techniques, such as …
In-Cell Enzymatic Glycosylation: A Way To Improve Productivity Of Heterologous Biosynthesis Pathways In Micro-Organism, Esben Hansen
In-Cell Enzymatic Glycosylation: A Way To Improve Productivity Of Heterologous Biosynthesis Pathways In Micro-Organism, Esben Hansen
Metabolic Engineering IX
No abstract provided.
Structure-Based Metabolic Engineering And Synthetic Biology For Efficient Strain Development, An Ping Zeng
Structure-Based Metabolic Engineering And Synthetic Biology For Efficient Strain Development, An Ping Zeng
Metabolic Engineering IX
No abstract provided.
Sustainable Production Of Industrial Chemicals Using Microbial Biocatalysts: 1,4-Butanediol, Mark Burk
Sustainable Production Of Industrial Chemicals Using Microbial Biocatalysts: 1,4-Butanediol, Mark Burk
Metabolic Engineering IX
No abstract provided.