Open Access. Powered by Scholars. Published by Universities.®

Digital Commons Network

Open Access. Powered by Scholars. Published by Universities.®

PDF

University of Central Florida

Faculty Bibliography 2010s

2013

Keyword

Articles 1 - 30 of 254

Full-Text Articles in Entire DC Network

Development Of Inspection Robots For Bridge Cables, Hae-Bum Yun, Se-Hoon Kim, Liuliu Wu, Jong-Jae Lee Jan 2013

Development Of Inspection Robots For Bridge Cables, Hae-Bum Yun, Se-Hoon Kim, Liuliu Wu, Jong-Jae Lee

Faculty Bibliography 2010s

This paper presents the bridge cable inspection robot developed in Korea. Two types of the cable inspection robots were developed for cable-suspension bridges and cable-stayed bridge. The design of the robot system and performance of the NDT techniques associated with the cable inspection robot are discussed. A review on recent advances in emerging robot-based inspection technologies for bridge cables and current bridge cable inspection methods is also presented.


Efficient Alignment Of Rna Secondary Structures Using Sparse Dynamic Programming, Cuncong Zhong, Shaojie Zhang Jan 2013

Efficient Alignment Of Rna Secondary Structures Using Sparse Dynamic Programming, Cuncong Zhong, Shaojie Zhang

Faculty Bibliography 2010s

Background: Current advances of the next-generation sequencing technology have revealed a large number of un-annotated RNA transcripts. Comparative study of the RNA structurome is an important approach to assess their biological functionalities. Due to the large sizes and abundance of the RNA transcripts, an efficient and accurate RNA structure-structure alignment algorithm is in urgent need to facilitate the comparative study. Despite the importance of the RNA secondary structure alignment problem, there are no computational tools available that provide high computational efficiency and accuracy. In this case, designing and implementing such an efficient and accurate RNA secondary structure alignment algorithm is …


The Water Demand Of Energy: Implications For Sustainable Energy Policy Development, Saeed Hadian, Kaveh Madani Jan 2013

The Water Demand Of Energy: Implications For Sustainable Energy Policy Development, Saeed Hadian, Kaveh Madani

Faculty Bibliography 2010s

With energy security, climate change mitigation, and sustainable development as three main motives, global energy policies have evolved, now asking for higher shares of renewable energies, shale oil and gas resources in the global energy supply portfolios. Yet, concerns have recently been raised about the environmental impacts of the renewable energy development, supported by many governments around the world. For example, governmental ethanol subsidies and mandates in the U. S. are aimed to increase the biofuel supply while the water footprint of this type of energy might be 70-400 times higher than the water footprint of conventional fossil energy sources. …


Enhanced Detection Of Host Response Antibodies To Borrelia Burgdorferi Using Immuno-Pcr, Micah D. Halpern, Sunny Jain, Mollie W. Jewett Jan 2013

Enhanced Detection Of Host Response Antibodies To Borrelia Burgdorferi Using Immuno-Pcr, Micah D. Halpern, Sunny Jain, Mollie W. Jewett

Faculty Bibliography 2010s

Lyme disease is the fastest-growing zoonotic disease in North America. Current methods for detection of Borrelia burgdorferi infection are challenged by analysis subjectivity and standardization of antigen source. In the present study, we developed an immuno-PCR (iPCR)-based approach employing recombinant in vivo-expressed B. burgdorferi antigens for objective detection of a host immune response to B. burgdorferi infection. iPCR is a liquid-phase protein detection method that combines the sensitivity of PCR with the specificity and versatility of immunoassay-based protocols. Use of magnetic beads coated with intact spirochetes provided effective antigen presentation and allowed detection of host-generated antibodies in experimentally infected mice …


Synchrotron X-Ray Measurement Techniques For Thermal Barrier Coated Cylindrical Samples Under Thermal Gradients, Sanna F. Siddiqui, Kevin Knipe, Albert Manero, Carla Meid, Janine Wischek, John Okasinski, Jonathan Almer, Anette M. Karlsson, Marion Bartsch, Seetha Raghavan Jan 2013

Synchrotron X-Ray Measurement Techniques For Thermal Barrier Coated Cylindrical Samples Under Thermal Gradients, Sanna F. Siddiqui, Kevin Knipe, Albert Manero, Carla Meid, Janine Wischek, John Okasinski, Jonathan Almer, Anette M. Karlsson, Marion Bartsch, Seetha Raghavan

Faculty Bibliography 2010s

Measurement techniques to obtain accurate in situ synchrotron strain measurements of thermal barrier coating systems (TBCs) applied to hollow cylindrical specimens are presented in this work. The Electron Beam Physical Vapor Deposition coated specimens with internal cooling were designed to achieve realistic temperature gradients over the TBC coated material such as that occurring in the turbine blades of aeroengines. Effects of the circular cross section on the x-ray diffraction (XRD) measurements in the various layers, including the thermally grown oxide, are investigated using high-energy synchrotron x-rays. Multiple approaches for beam penetration including collection, tangential, and normal to the layers, along …


A Conserved Hydrolase Responsible For The Cleavage Of Aminoacylphosphatidylglycerol In The Membrane Of Enterococcus Faecium, Angela M. Smith, Jesse S. Harrison, Kevin M. Sprague, Hervé Roy Jan 2013

A Conserved Hydrolase Responsible For The Cleavage Of Aminoacylphosphatidylglycerol In The Membrane Of Enterococcus Faecium, Angela M. Smith, Jesse S. Harrison, Kevin M. Sprague, Hervé Roy

Faculty Bibliography 2010s

Aminoacylphosphatidylglycerol synthases (aaPGSs) are enzymes that transfer amino acids from aminoacyl-tRNAs (aa-tRNAs) to phosphatidylglycerol (PG) to form aa-PG in the cytoplasmic membrane of bacteria. aa-PGs provide bacteria with resistance to a range of antimicrobial compounds and stress conditions. Enterococcus faecium encodes a triple-specific aaPGS (RakPGS) that utilizes arginine, alanine, and lysine as substrates. Here we identify a novel hydrolase (AhyD), encoded immediately adjacent to rakPGS in E. faecium, which is responsible for the hydrolysis of aa-PG. The genetic synteny of aaPGS and ahyD is conserved in > 60 different bacterial species. Deletion of ahyD in E. faecium resulted in increased formation …


Microphysiological Systems And Low-Cost Microfluidic Platform With Analytics, Alec S.T. Smith, Christopher J. Long, Bonnie J. Berry, Christopher Mcaleer, Maria Stancescu, Peter Molnar, Paula G. Miller, Mandy B. Esch, Jean-Matthieu Prot, James J. Hickman, Michael L. Shuler Jan 2013

Microphysiological Systems And Low-Cost Microfluidic Platform With Analytics, Alec S.T. Smith, Christopher J. Long, Bonnie J. Berry, Christopher Mcaleer, Maria Stancescu, Peter Molnar, Paula G. Miller, Mandy B. Esch, Jean-Matthieu Prot, James J. Hickman, Michael L. Shuler

Faculty Bibliography 2010s

A multiorgan, functional, human in vitro assay system or 'Body-on-a-Chip' would be of tremendous benefit to the drug discovery and toxicology industries, as well as providing a more biologically accurate model for the study of disease as well as applied and basic biological research. Here, we describe the advances our team has made towards this goal, as well as the most pertinent issues facing further development of these systems. Description is given of individual organ models with appropriate cellular functionality, and our efforts to produce human iterations of each using primary and stem cell sources for eventual incorporation into this …


Impact Of Charge Impurities On Transport Properties Of Graphene Nanoribbons, Christian W. Smith, Jyoti Katoch, Masa Ishigami Jan 2013

Impact Of Charge Impurities On Transport Properties Of Graphene Nanoribbons, Christian W. Smith, Jyoti Katoch, Masa Ishigami

Faculty Bibliography 2010s

Previous experimental studies have shown qualitative dependence of transport property of graphene nanoribbons on external charged impurities. We have measured transport properties of a graphene nanoribbon at increasing coverage of charged impurities in an ultra high vacuum environment. We discovered an exact relationship between the source-drain and gate gaps at increasing charged impurity density. In addition, we found that graphene nanoribbons have different electronic screening as compared to bulk graphene. Our study paves the way for controlling transport property of nanoribbons using extrinsic impurities.


Growth Of High Quality Zno Thin Films With A Homonucleation On Sapphire, Ming Wei, Ryan Casey Boutwell, Nikolai Faleev, Andrei Osinsky, Winston V. Schoenfeld Jan 2013

Growth Of High Quality Zno Thin Films With A Homonucleation On Sapphire, Ming Wei, Ryan Casey Boutwell, Nikolai Faleev, Andrei Osinsky, Winston V. Schoenfeld

Faculty Bibliography 2010s

ZnO thin films were epitaxially grown on c-plane sapphire substrates by plasma-assisted molecular beam epitaxy. A low temperature homonucleation ZnO layer was found crucial at the interfacial region to absorb the defects formed by the lattice mismatch between the sapphire and ZnO, resulting in a smooth surface that enables smooth 2D epitaxial growth. High quality ZnO films were achieved after careful optimization of critical growth conditions: the sequence of Zn and O source shutters, growth temperature for both the ZnO nucleation and growth layer, and Zn/O ratio. Oxygen plasma pretreatment was not applied prior to the growth, thus shortening the …


Droplet Deformation And Manipulation In An Electrified Microfluidic Channel, Jonathan D. Wehking, Larry Chew, Ranganathan Kumar Jan 2013

Droplet Deformation And Manipulation In An Electrified Microfluidic Channel, Jonathan D. Wehking, Larry Chew, Ranganathan Kumar

Faculty Bibliography 2010s

This letter studies electrically induced droplet deformation to predictably pin and route droplets in a T-junction microchannel. Droplets of various sizes are shown to deform differently and respond to steep electric potential gradients. The relative magnitudes of inertial and electric forces are responsible for droplet deceleration and pinning, and may be manipulated to route a droplet in either direction of a T-junction.


Local Pt Invariance And Supersymmetric Parametric Oscillators, Ramy El-Ganainy, Konstantinos G. Makris, Demetrios N. Christodoulides Jan 2013

Local Pt Invariance And Supersymmetric Parametric Oscillators, Ramy El-Ganainy, Konstantinos G. Makris, Demetrios N. Christodoulides

Faculty Bibliography 2010s

We introduce the concept of local parity-time symmetric (PT) invariance in optical waveguides (or cavity) structures. Starting from a Lagrangian formalism, we establish the connection between light dynamics in these configurations and the seemingly different physics of "supersymmetric" parametric oscillators. Using this powerful tool, we present analytical solutions for optical beam propagation in local PT-invariant coupled systems and we show that the intensity tunneling between the two channels critically depends on the initial conditions. For unbalanced inputs, symmetric as well as asymmetric power evolution can be observed depending on the excitation channel. On the other hand, under certain physical conditions, …


Adsorption Of Silicon On Au(110): An Ordered Two Dimensional Surface Alloy, Hanna Enriquez, Andrew Mayne, Abdelkader Kara, Sébastien Vizzini, Silvan Roth, Boubekeur Lalmi, Ari P. Seitsonen, Bernard Aufray, Thomas Greber, Rachid Belkhou, Gérald Dujardin, Hamid Oughaddou Jan 2013

Adsorption Of Silicon On Au(110): An Ordered Two Dimensional Surface Alloy, Hanna Enriquez, Andrew Mayne, Abdelkader Kara, Sébastien Vizzini, Silvan Roth, Boubekeur Lalmi, Ari P. Seitsonen, Bernard Aufray, Thomas Greber, Rachid Belkhou, Gérald Dujardin, Hamid Oughaddou

Faculty Bibliography 2010s

We report on experimental evidence for the formation of a two dimensional Si/Au(110) surface alloy. In this study, we have used a combination of scanning tunneling microscopy, low energy electron diffraction, Auger electron spectroscopy, and ab initio calculations based on density functional theory. A highly ordered and stable Si-Au surface alloy is observed subsequent to growth of a sub-monolayer of silicon on an Au(110) substrate kept above the eutectic temperature.


Dual-Arm Z-Scan Technique To Extract Dilute Solute Nonlinearities From Solution Measurements, Manual R. Ferdinandus, Matthew Reichert, Trenton R. Ensley, Honghua Hu, Dmitry A. Fishman, Scott Webster, David J. Hagan, Eric W. Van Stryland Jan 2013

Dual-Arm Z-Scan Technique To Extract Dilute Solute Nonlinearities From Solution Measurements, Manual R. Ferdinandus, Matthew Reichert, Trenton R. Ensley, Honghua Hu, Dmitry A. Fishman, Scott Webster, David J. Hagan, Eric W. Van Stryland

Faculty Bibliography 2010s

We present a technique in which small solute nonlinearities may be extracted from large solvent signals by performing simultaneous Z-scans on two samples (solvent and solution). By using a dual-arm Z-scan apparatus with identical arms, fitting error in determining the solute nonlinearity is reduced because the irradiance fluctuations are correlated for both the solvent and solution measurements. To verify the sensitivity of this technique, the dispersion of nonlinear refraction of a squaraine molecule is measured. Utilizing this technique allows for the effects of the solvent n(2) to be effectively eliminated, thus overcoming a longstanding problem in nonlinear optical characterization of …


Phase-Unlocked Hong-Ou-Mandel Interferometry, Ayman F. Abouraddy, Timothy M. Yarnall, Giovanni Di Giuseppe Jan 2013

Phase-Unlocked Hong-Ou-Mandel Interferometry, Ayman F. Abouraddy, Timothy M. Yarnall, Giovanni Di Giuseppe

Faculty Bibliography 2010s

There is a fundamental dimensional mismatch between the Hong-Ou-Mandel (HOM) interferometer and two-photon (2P) states: while the latter are represented using two temporal (or spectral) dimensions, the HOM interferometer allows access to only one temporal dimension. We introduce a linear 2P interferometer containing two independent delays spanning the 2P state. By "unlocking" the fixed phase relationship between the interfering 2P probability amplitudes in a HOM interferometer, one of these probability amplitudes now serves as a delay-free 2P reference against which the other beats, thereby resolving ambiguities in 2P state identification typical of HOM interferometry and extending its utility to a …


Laplace Deconvolution With Noisy Observations, Felix Abramovich, Marianna Pensky, Yves Rozenholc Jan 2013

Laplace Deconvolution With Noisy Observations, Felix Abramovich, Marianna Pensky, Yves Rozenholc

Faculty Bibliography 2010s

In the present paper we consider Laplace deconvolution for discrete noisy data observed on the interval whose length T-n may increase with a sample size. Although this problem arises in a variety of applications, to the best of our knowledge, it has been given very little attention by the statistical community. Our objective is to fill this gap and provide statistical treatment of Laplace deconvolution problem with noisy discrete data. The main contribution of the paper is explicit construction of an asymptotically rate-optimal (in the minimax sense) Laplace deconvolution estimator which is adaptive to the regularity of the unknown function. …


Driven Translocation Of A Semi-Flexible Chain Through A Nanopore: A Brownian Dynamics Simulation Study In Two Dimensions, Ramesh Adhikari, Aniket Bhattacharya Jan 2013

Driven Translocation Of A Semi-Flexible Chain Through A Nanopore: A Brownian Dynamics Simulation Study In Two Dimensions, Ramesh Adhikari, Aniket Bhattacharya

Faculty Bibliography 2010s

We study translocation dynamics of a semi-flexible polymer chain through a nanoscopic pore in two dimensions using Langevin dynamics simulation in presence of an external bias F inside the pore. For chain length N and stiffness parameter kappa(b) considered in this paper, we observe that the mean first passage time < tau > increases as < tau(kappa(b)) > similar to < tau(kappa(b) = 0) > l(p)(aN), where kappa(b) and l(p) are the stiffness parameter and persistence length, respectively, and a(N) is a constant that has a weak N dependence. We monitor the time dependence of the last monomer x(N)(t) at the cis compartment and calculate the tension propagation time (TP) t(tp) …


Formation Of An Amorphous Phase And Its Crystallization In The Immiscible Nb-Zr System By Mechanical Alloying, N. Al-Aqeeli, C. Suryananrayana, M. A. Hussein Jan 2013

Formation Of An Amorphous Phase And Its Crystallization In The Immiscible Nb-Zr System By Mechanical Alloying, N. Al-Aqeeli, C. Suryananrayana, M. A. Hussein

Faculty Bibliography 2010s

Mechanical alloying of binary Nb-Zr powder mixtures was carried out to evaluate the formation of metastable phases in this immiscible system. The milled powders were characterized for their constitution and structure by X-ray diffraction and transmission electron microscopy methods. It was shown that an amorphous phase had formed on milling the binary powder mixture for about 10 h and that it had crystallized on subsequent milling up to 50-70 h, referred to as mechanical crystallization. Thermodynamic and structural arguments have been presented to explain the formation of the amorphous phase and its subsequent crystallization.


Physical Properties Of B-Type Asteroids From Wise Data, V. Alí-Lagoa, J. De León, J. Licandro, M. Delbó, H. Campins, N. Pinilla-Alonso, M. S. Kelley Jan 2013

Physical Properties Of B-Type Asteroids From Wise Data, V. Alí-Lagoa, J. De León, J. Licandro, M. Delbó, H. Campins, N. Pinilla-Alonso, M. S. Kelley

Faculty Bibliography 2010s

Aims. Our aim is to obtain more information about the physical nature of B-type asteroids and extend previous work by studying their physical properties as derived from fitting an asteroid thermal model to their NASA's Wide-field Infrared Survey Explorer (WISE) data. We also examine the Pallas collisional family, a B-type family with a moderately high albedo in contrast to the large majority of B-types. Methods. We applied a combination of the near-Earth asteroid thermal model and a model of the reflected sunlight to WISE asteroid data in order to derive up to four parameters: effective diameter (D), the so-called infrared …


The Bis(Indolyl)Imidazole Alkaloid Nortopsentin A Exhibits Antiplasmodial Activity, Stephenie Alvardo, Bracken F. Roberts, Amy E. Wright, Debopam Chakrabarti Jan 2013

The Bis(Indolyl)Imidazole Alkaloid Nortopsentin A Exhibits Antiplasmodial Activity, Stephenie Alvardo, Bracken F. Roberts, Amy E. Wright, Debopam Chakrabarti

Faculty Bibliography 2010s

A library of enriched marine natural product fractions was screened for their antiplasmodial activity using a SYBR green I fluorescence-based assay. Fractions derived from a sponge of the genus Spongosorites exhibited potent inhibition of Plasmodium falciparum growth. This genus of sponge has been reported to contain the nortopsentin and topsentin class of bis-indole imidazole alkaloids. This is the first report of nortopsentin A inhibiting parasite growth at the trophozoite stage at submicromolar 50% inhibitory concentrations (IC50).


Thermal Emission At 3.6-8 Mu M From Wasp-19b: A Hot Jupiter Without A Stratosphere Orbiting An Active Star, D. R. Anderson, A. M. S. Smith, N. Madhusudhan, P. J. Wheatley, A. Collier Cameron, C. Hellier, C. Campo, M. Gillon, Joseph Harrington, P. F. L. Maxted, D. Pollacco, D. Queloz, B. Smalley, A. H. M. J. Triaud, R. G. West Jan 2013

Thermal Emission At 3.6-8 Mu M From Wasp-19b: A Hot Jupiter Without A Stratosphere Orbiting An Active Star, D. R. Anderson, A. M. S. Smith, N. Madhusudhan, P. J. Wheatley, A. Collier Cameron, C. Hellier, C. Campo, M. Gillon, Joseph Harrington, P. F. L. Maxted, D. Pollacco, D. Queloz, B. Smalley, A. H. M. J. Triaud, R. G. West

Faculty Bibliography 2010s

We report detection of thermal emission from the exoplanet WASP-19b at 3.6, 4.5, 5.8 and 8.0 mu m. We used the InfraRed Array Camera on the Spitzer Space Telescope to observe two occultations of WASP-19b by its host star. We combine our new detections with previous measurements of WASP-19b's emission at 1.6 and 2.09 mu m to construct a spectral energy distribution of the planet's dayside atmosphere. By comparing this with model-atmosphere spectra, we find that the dayside atmosphere of WASP-19b lacks a strong temperature inversion. As WASP-19 is an active star (log R'(HK) = -4.50 +/- 0.03), this finding …


Aqueous Route For The Synthesis Of Platinum, Ruthenium And Ceria Nanoparticles On Multi-Walled Carbon Nanotubes For The Electrooxidation Of Methanol And Ethanol, Jordan M. Anderson, Matthew D. Mcinnis, Astha Malhotra, Lei Zhai Jan 2013

Aqueous Route For The Synthesis Of Platinum, Ruthenium And Ceria Nanoparticles On Multi-Walled Carbon Nanotubes For The Electrooxidation Of Methanol And Ethanol, Jordan M. Anderson, Matthew D. Mcinnis, Astha Malhotra, Lei Zhai

Faculty Bibliography 2010s

The electrochemical oxidation of methanol and ethanol in acidic media was studied using electrodes composed of multi-walled carbon nanotubes (MWCNTs) decorated with Pt, Ru and ceria nanoparticles. Polystyrene sulfonate (PSS) was used to disperse the MWCNTs in water and provide nucleation sites for the growth of catalyst nanoparticles. Composite electrodes were characterized for structural and electrochemical properties and all electrodes modified with Ru displayed greater catalytic ability for alcohol oxidation than those without Ru. In addition, the inclusion of ceria seemed to increase the catalytic ability in every sample suggesting a synergistic effect between Pt, Ru and ceria for the …


Deploying Real-Life Wsn Applications: Challenges, Solutions, And Future Directions, Regina B. Araujo, Carlos H. Ribeiro, Damla Turgut, Jo Ueyama, Torsten Braun Jan 2013

Deploying Real-Life Wsn Applications: Challenges, Solutions, And Future Directions, Regina B. Araujo, Carlos H. Ribeiro, Damla Turgut, Jo Ueyama, Torsten Braun

Faculty Bibliography 2010s

No abstract provided.


Near- And Far-Field Spectroscopic Imaging Investigation Of Resonant Square-Loop Infrared Metasurfaces, Jeffrey D' Archangel, Eric Tucker, Ed Kinzel, Eric A. Muller, Hans A. Bechtel, Michael C. Martin, Markus D. Raschke, Glenn Boreman Jan 2013

Near- And Far-Field Spectroscopic Imaging Investigation Of Resonant Square-Loop Infrared Metasurfaces, Jeffrey D' Archangel, Eric Tucker, Ed Kinzel, Eric A. Muller, Hans A. Bechtel, Michael C. Martin, Markus D. Raschke, Glenn Boreman

Faculty Bibliography 2010s

Optical metamaterials have unique properties which result from geometric confinement of the optical conductivity. We developed a series of infrared metasurfaces based on an array of metallic square loop antennas. The far-field absorption spectrum can be designed with resonances across the infrared by scaling the geometric dimensions. We measure the amplitude and phase of the resonant mode as standing wave patterns within the square loops using scattering-scanning near-field optical microscopy (s-SNOM). Further, using a broad-band synchrotron-based FTIR microscope and s-SNOM at the Advanced Light Source, we are able to correlate far-field spectra to near-field modes of the metasurface as the …


Well-Posed And Ill-Posed Boundary Value Problems For Pde 2013, Allaberen Ashyralyev, Sergey Piskarev, Valery Covachev, Ravshan Ashurov, Hasan Ali Yurtsever, Abdullah Said Erdogan Jan 2013

Well-Posed And Ill-Posed Boundary Value Problems For Pde 2013, Allaberen Ashyralyev, Sergey Piskarev, Valery Covachev, Ravshan Ashurov, Hasan Ali Yurtsever, Abdullah Said Erdogan

Faculty Bibliography 2010s

No abstract provided.


Meter-Sized Moonlet Population In Saturn's C Ring And Cassini Division, Kévin Baillié, Joshua E. Colwell, Larry W. Esposito, Mark C. Lewis Jan 2013

Meter-Sized Moonlet Population In Saturn's C Ring And Cassini Division, Kévin Baillié, Joshua E. Colwell, Larry W. Esposito, Mark C. Lewis

Faculty Bibliography 2010s

Stellar occultations observed by the Cassini Ultraviolet Imaging Spectrograph reveal the presence of transparent holes a few meters to a few tens of meters in radial extent in otherwise optically thick regions of the C ring and the Cassini Division. We attribute the holes to gravitational disturbances generated by a population of similar to 10 m boulders in the rings that is intermediate in size between the background ring particle size distribution and the previously observed similar to 100 m propeller moonlets in the A ring. The size distribution of these boulders is described by a shallower power-law than the …


Imaging Of Benign Soft Tissue Tumors, Laura W. Bancroft, Christopher Pettis, Christopher Wasyliw Jan 2013

Imaging Of Benign Soft Tissue Tumors, Laura W. Bancroft, Christopher Pettis, Christopher Wasyliw

Faculty Bibliography 2010s

The evaluation of soft tissue tumors should be approached systematically, with careful assessment of the patient's age, clinical presentation, anatomical location of the mass, and MRI characteristics. The imaging evaluation of a suspected soft tissue mass begins with conventional radiography to exclude an underlying osseous lesion and assess for any lesional calcification. MRI is particularly useful in evaluating the signal intensity, enhancement pattern, and extent of soft tissue masses that can expand beyond fascial planes and involve the neurovascular bundle, joint, or bone. Among the common benign soft tissue tumors, a fairly definitive imaging diagnosis can be made in cases …


Nonlinearity Mitigation For High-Speed Optical Ofdm Transmitters Using Digital Pre-Distortion, Yuan Bao, Zhaohui Li, Jianping Li, Xinhuan Feng, Bai-Ou Guan, Guifang Li Jan 2013

Nonlinearity Mitigation For High-Speed Optical Ofdm Transmitters Using Digital Pre-Distortion, Yuan Bao, Zhaohui Li, Jianping Li, Xinhuan Feng, Bai-Ou Guan, Guifang Li

Faculty Bibliography 2010s

Optical orthogonal frequency-division multiplexing (OOFDM) signal is sensitive to nonlinear distortions induced by optical modulators. We propose and experimentally demonstrate a digital pre-distortion (DPD) algorithm to linearize the optical modulators including electro-absorption modulated lasers (EML) and Mach-Zehnder modulators (MZM) used in high-speed OOFDM transmitters. By using an adaptive DPD algorithm with a learning structure, the inverse transfer function of a modulator, which is based on a polynomial model, has been obtained. In the experiment, the performance improvements with and without considering the memory effects of the DPD model are illustrated. The two typical kinds of high-speed OOFDM signals with a …


Response To "Comment On 'Confined Propagation And Near Single-Mode Laser Oscillation In A Gain-Guided, Index Antiguided Optical Fiber'" Appl. Phys. Lett. 102, 026101 (2013), Michael Bass, Martin C. Richardson, John Ballato Jan 2013

Response To "Comment On 'Confined Propagation And Near Single-Mode Laser Oscillation In A Gain-Guided, Index Antiguided Optical Fiber'" Appl. Phys. Lett. 102, 026101 (2013), Michael Bass, Martin C. Richardson, John Ballato

Faculty Bibliography 2010s

No abstract provided.


Insight Into Morphology Changes Of Nanoparticle Laden Droplets In Acoustic Field, Saptarshi Basu, Erick Tijerino, Ranganathan Kumar Jan 2013

Insight Into Morphology Changes Of Nanoparticle Laden Droplets In Acoustic Field, Saptarshi Basu, Erick Tijerino, Ranganathan Kumar

Faculty Bibliography 2010s

Hollow structures with unique morphologies form due to particle agglomeration in acoustically levitated nanofluid functional droplets when subjected to external heating. The final diameter of the structure depends only on the ratio of agglomeration to evaporation time scales for various nanoparticle laden droplets, and not on the type of the suspended particles. These time scales depend only on nanoparticle concentration. This valuable information may be exploited to form microstructures with desired properties from ceramic compounds. Phase diagrams for alumina and silica droplets indicate the transition from a bowl to ring structure depending on concentration.


Centaurs And Scattered Disk Objects In The Thermal Infrared: Analysis Of Wise-Neowise Observations, James M. Bauer, Tommy Grav, Erin Blauvelt, A. K. Mainzer, Joseph R. Masiero, Rachel Stevenson, Emily Kramer, Yan R. Fernández, C. M. Lisse, Roc M. Cutri, Paul R. Weissman, John W. Dailey, Frank J. Masci, Russel Walker, Adam Waszczak, Carrie R. Nugent, Karen J. Meech, Andrew Lucas, George Pearman, Ashlee Wilkins, Jessica Watkins, Shrinivas Kulkarni, Edward L. Wright Jan 2013

Centaurs And Scattered Disk Objects In The Thermal Infrared: Analysis Of Wise-Neowise Observations, James M. Bauer, Tommy Grav, Erin Blauvelt, A. K. Mainzer, Joseph R. Masiero, Rachel Stevenson, Emily Kramer, Yan R. Fernández, C. M. Lisse, Roc M. Cutri, Paul R. Weissman, John W. Dailey, Frank J. Masci, Russel Walker, Adam Waszczak, Carrie R. Nugent, Karen J. Meech, Andrew Lucas, George Pearman, Ashlee Wilkins, Jessica Watkins, Shrinivas Kulkarni, Edward L. Wright

Faculty Bibliography 2010s

The Wide-field Infrared Survey Explorer (WISE) observed 52 Centaurs and scattered disk objects (SDOs) in the thermal infrared, including 15 new discoveries. We present analyses of these observations to estimate sizes and mean optical albedos. We find mean albedos of 0.08 +/- 0.04 for the entire data set. Thermal fits yield average beaming parameters of 0.9 +/- 0.2 that are similar for both SDO and Centaur sub-classes. Biased cumulative size distributions yield size-frequency distribution power law indices of similar to-1.7 +/- 0.3. The data also reveal a relation between albedo and color at the 3 sigma level. No significant relation …