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The Nature of Accelerating Modes in PBG Fibers

Description: Transverse magnetic (TM) modes with phase velocities at or just below the speed of light, c, are intended to accelerate relativistic particles in hollow-core, photonic band gap (PBG) fibers. These are so-called 'surface defect modes', being lattice modes perturbed by the defect to have their frequencies shifted into the band gap, and they can have any phase velocity. PBG fibers also support so-called 'core defect modes' which are characterized as having phase velocities always greater than c an… more
Date: May 19, 2011
Creator: Noble, TRobert J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Accurate estimation of the elastic properties of porous fibers

Description: A procedure is described to calculate polycrystalline anisotropic fiber elastic properties with cylindrical symmetry and porosity. It uses a preferred orientation model (Tome ellipsoidal self-consistent model) for the determination of anisotropic elastic properties for the case of highly oriented carbon fibers. The model predictions, corrected for porosity, are compared to back-calculated fiber elastic properties of an IM6/3501-6 unidirectional composite whose elastic properties have been deter… more
Date: May 1997
Creator: Thissell, W. R.; Zurek, A. K. & Addessio, F.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Quantum cryptography over underground optical fibers

Description: Quantum cryptography is an emerging technology in which two parties may simultaneously generated shared, secret cryptographic key material using the transmission of quantum states of light whose security is based on the inviolability of the laws of quantum mechanics. An adversary can neither successfully tap the key transmissions, nor evade detection, owing to Heisenberg`s uncertainty principle. In this paper the authors describe the theory of quantum cryptography, and the most recent results f… more
Date: May 1, 1996
Creator: Hughes, R. J.; Luther, G. G.; Morgan, G. L.; Peterson, C. G. & Simmons, C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Remote Synchrotron Light Instrumentation Using Optical Fibers

Description: By coupling the emitted synchrotron light into an optical fiber, it is possible to transmit the signal at substantial distances from the light port, without the need to use expensive beamlines. This would be especially beneficial in all those cases when the synchrotron is situated in areas not easily access because of their location, or due to high radiation levels. Furthermore, the fiber output can be easily switched, or even shared, between different diagnostic instruments. We present the lat… more
Date: May 4, 2009
Creator: De Santis, S. & Yin, Y.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Dielectric property measurement of zirconia fibers at high temperatures

Description: Using a self-heating, electronically tunable microwave dielectrometer, the complex dielectric constant of zirconia-based filaments was measured at 915 MHz from 350{degrees} to 1100{degrees}C. This fibrous material cools rapidly to near room temperature within several seconds due to a large surface area to volume ratio. Such rapid sample cooling necessitates the use of a self-heating technique to measure the complex dielectric constant at temperatures up to 1100{degrees}C. Sample temperature was… more
Date: May 1, 1995
Creator: Vogt, G.J.; Tinga, W.R. & Plovnick, R.H.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

SBIR Final Report. Liquid Core Optical Scintillating Fibers

Description: This Phase I SBIR project focused on developing flexible scintillating liquid core optical fibers, with potential uses in high-energy calorimetry, tracking, preradiators, active targets or other fast detectors. Progress on the six tasks of the project is summarized. The technical developments involve three technology components: (1) highly flexible capillaries or tubes of relatively low n (index of refraction) to serve as cladding and liquid core containment; (2) scintillator (and clear) fluids… more
Date: May 16, 2000
Creator: Beetz, C.P.; Steinbeck, J. & Buerstler, R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Effects of Birefringence and Nonlinearity on Optical Pulse Propagation in New Types of Optical Fibers

Description: The purpose of this grant was to allow us to complete work that we had already begun on spun optical fibers and to begin studies of holey and photonic crystal optical fibers. The work on spun optical fibers was completed with great success. It led to several publications in collaboration with our co-workers at the Universita di Padova, and the student who carried out this work received a major award from the Universita di Padova. The work on holey and photonic crystal fibers has proceeded more … more
Date: May 15, 2005
Creator: Menyuk, Curtis R. & Carter, Gary M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Determination of pulse broadening in optical fibers from numerical solutions of a wave equation

Description: Dispersion is one of the most important properties of optical fibers, since it determines their information carrying capacity. In the past, estimates of fiber dispersion have been based on a highly approximate modal analysis. A new method based on accurate numerical solutions of Maxwell's wave equation for calculating pulse dispersion in graded index fibers is described. The methods discussed should also be useful for studying many properties of fiber optic transmission. 6 figures.
Date: May 1, 1977
Creator: Feit, M. D. & Fleck, J. A., Jr.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

The Cotton Kinesin-Like Calmodulin-Binding Protein Associates with Cortical Microtubles in cotton Fibers

Description: Microtubules in interphase plant cells form a cortical array, which is critical for plant cell morphogenesis. Genetic studies imply that the minus end-directed microtubule motor kinesin-like calmodulin-binding protein (KCBP) plays a role in trichome morphogenesis in Arabidopsis. However, it was not clear whether this motor interacted with interphase microtubules. In cotton (Gossypium hirsutum) fibers, cortical microtubules undergo dramatic reorganization during fiber development. In this study,… more
Date: May 1, 2003
Creator: L., Preuss M.; Delmar, D.P. & Liu, Bo
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Dimensional stability and tensile strength of irradiated Nicalon-CG and Hi-Nicalon SiC fibers

Description: Nicalon-CG and Hi-Nicalon fibers were characterized by measuring their length, density, and tensile strength in the unirradiated, thermal annealed, and irradiated conditions. The irradiation was conducted in the EBR-II to a dose of 43 dpa-SiC at a nominal irradiation temperature of 1,000 C. The annealed specimens were held at 1,010 C for 165 days to approximately duplicate the thermal exposure of the irradiated specimens. The results indicate the fibers that perform best in an irradiation envir… more
Date: May 1, 1997
Creator: Youngblood, G. E.; Henager, C. H., Jr.; Senor, D. J.; Newsome, G. A. & Woods, J. J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Wear resistant composite structure of vitreous carbon containing convoluted fibers. Final report

Description: Energy Related Inventions Program Number 613 was a two year program to commercialize a unique new wear material, Metal Reinforced Carbon Composite, MRCC. The program was designed to manufacture sample components of MRCC for evaluation by potential users and manufacturers. As a result of the program Burton Technologies Inc. and Rotary Power International are forming a joint company to manufacture, market and license MRCC materials to a wide range of industries.
Date: May 28, 1996
Creator: Burton, R. G. & Burton, R. A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department

[Group of fibers students and a coverlet woven]

Description: Photograph of UNT Fibers visiting Assistant Professor Gabe Duggan standing next to a group of fibers students and a coverlet woven collaboratively by those and other students. The coverlet was donated to the Texas Fashion Collection and is seen here in a TFC workspace in Welch Street Complex 1.
Date: May 16, 2019
Item Type: Refine your search to only Photograph
Partner: UNT Libraries Special Collections
open access

Effect of Retting on Surface Chemistry and Mechanical Performance Interactions in Natural Fibers for High Performance Polymer Composites

Description: Sustainability through replacement of non-renewable fibers with renewable fibers is an ecological need. Impact of transportation costs from South-east Asia on the life cycle analysis of the composite is detrimental. Kenaf is an easily grown crop in America. Farm based processing involves placing the harvested crop in rivers and ponds, where retting of the fibers from the plant (separation into fibers) can take 2 weeks or more. The objective of this thesis is to analyze industrially viable proce… more
Date: May 2013
Creator: Ramesh, Dinesh
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
open access

Identification and quantification of lipid metabolites in cotton fibers: Reconciliation with metabolic pathway predictions from DNA databases.

Description: The lipid composition of cotton (Gossypium hirsutum, L) fibers was determined. Fatty acid profiles revealed that linolenate and palmitate were the most abundant fatty acids present in fiber cells. Phosphatidylcholine was the predominant lipid class in fiber cells, while phosphatidylethanolamine, phosphatidylinositol and digalactosyldiacylglycerol were also prevalent. An unusually high amount of phosphatidic acid was observed in frozen cotton fibers. Phospholipase D activity assays revealed that… more
Date: May 2004
Creator: Wanjie, Sylvia W.
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
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