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Adaptable Multivariate Calibration Models for Spectral Applications
Multivariate calibration techniques have been used in a wide variety of spectroscopic situations. In many of these situations spectral variation can be partitioned into meaningful classes. For example, suppose that multiple spectra are obtained from each of a number of different objects wherein the level of the analyte of interest varies within each object over time. In such situations the total spectral variation observed across all measurements has two distinct general sources of variation: intra-object and inter-object. One might want to develop a global multivariate calibration model that predicts the analyte of interest accurately both within and across objects, including new objects not involved in developing the calibration model. However, this goal might be hard to realize if the inter-object spectral variation is complex and difficult to model. If the intra-object spectral variation is consistent across objects, an effective alternative approach might be to develop a generic intra-object model that can be adapted to each object separately. This paper contains recommendations for experimental protocols and data analysis in such situations. The approach is illustrated with an example involving the noninvasive measurement of glucose using near-infrared reflectance spectroscopy. Extensions to calibration maintenance and calibration transfer are discussed.
Date:
December 20, 1999
Creator:
THOMAS,EDWARD V.
Object Type:
Article
System:
The UNT Digital Library
An advanced control system for fine coal flotation
None
Date:
December 20, 1999
Creator:
Adel, G. T. & Luttrell, G. H.
Object Type:
Report
System:
The UNT Digital Library
Altus Times (Altus, Okla.), Vol. 100, No. 235, Ed. 1 Monday, December 20, 1999
Daily newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.
Date:
December 20, 1999
Creator:
Bush, Michael
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Alvin Sun (Alvin, Tex.), Vol. 108, No. 141, Ed. 1 Monday, December 20, 1999
Weekly newspaper from Alvin, Texas that includes local, state, and national news along with advertising.
Date:
December 20, 1999
Creator:
Schwind, Jim & Holton, Kathleen
Object Type:
Newspaper
System:
The Portal to Texas History
Atmospheric Test Models and Numerical Experiments for the Simulation of the Global Distributions of Weather Data Transponders III. Horizontal Distributions
A network of small balloon-borne transponders which gather very high resolution wind and temperature data for use by modern numerical weather predication models has been proposed to improve the reliability of long-range weather forecasts. The global distribution of an array of such transponders is simulated using LLNL's atmospheric parcel transport model (GRANTOUR) with winds supplied by two different general circulation models. An initial study used winds from CCM3 with a horizontal resolution of about 3 degrees in latitude and longitude, and a second study used winds from NOGAPS with a 0.75 degree horizontal resolution. Results from both simulations show that reasonable global coverage can be attained by releasing balloons from an appropriate set of launch sites.
Date:
December 20, 1999
Creator:
Molenkamp, C.R. & Grossman, A.
Object Type:
Report
System:
The UNT Digital Library
The Baytown Sun (Baytown, Tex.), Vol. 78, No. 43, Ed. 1 Monday, December 20, 1999
Daily newspaper from Baytown, Texas that includes local, state, and national news along with advertising.
Date:
December 20, 1999
Creator:
Cash, Wanda Garner
Object Type:
Newspaper
System:
The Portal to Texas History
Defense Transportation: Process Reengineering Could Be Enhanced by Performance Measures
A letter report issued by the General Accounting Office with an abstract that begins "Pursuant to a congressional request, GAO provided information on defense transportation, focusing on the: (1) progress in reengineering defense transportation financial management processes; (2) challenges associated with implementing these reengineered processes agencywide; and (3) the extent to which the Department of Defense (DOD) is assessing the infrastructure required to support the reengineered processes."
Date:
December 20, 1999
Creator:
United States. General Accounting Office.
Object Type:
Report
System:
The UNT Digital Library
Environmental Protection Agency: National Pollutant Discharge Elimination System--Regulations for Revision of the Water Pollution Control Program Addressing Storm Water Discharge
Other written product issued by the General Accounting Office with an abstract that begins "Pursuant to a legislative requirement, GAO reviewed the Environmental Protection Agency's (EPA) new rule on National Pollutant Discharge Elimination System--regulations for revision of the Water Pollution Control Program addressing storm water discharges. GAO noted that: (1) the rule would expand the existing National Pollution Discharge Elimination System storm water program to address storm water discharges from small municipal separate storm sewer systems (those serving less than 100,000 persons) and construction sites that disturb one to five acres; and (2) EPA complied with the applicable requirements in promulgating the rule."
Date:
December 20, 1999
Creator:
United States. General Accounting Office.
Object Type:
Text
System:
The UNT Digital Library
The Express-Star (Chickasha, Okla.), Ed. 1 Monday, December 20, 1999
Daily newspaper from Chickasha, Oklahoma that includes local, state, and national news along with advertising.
Date:
December 20, 1999
Creator:
Bush, Kent
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Extracellular iron-sulfur precipitates from growth of Desulfovibrio desulfuricans
The authors have examined extracellular iron-bearing precipitates resulting from the growth of Desulfovibrio desulfuricans in a basal medium with lactate as the carbon source and ferrous sulfate. Black precipitates were obtained when D. desulfuricans was grown with an excess of FeSO{sub 4}. When D. desulfuricans was grown under conditions with low amounts of FeSO{sub 4}, brown precipitates were obtained. The precipitates were characterized by iron K-edge XAFS (X-ray absorption fine structure), {sup 57}Fe Moessbauer-effect spectroscopy, and powder X-ray diffraction. Both were noncrystalline and nonmagnetic (at room temperature) solids containing high-spin Fe(III). The spectroscopic data for the black precipitates indicate the formation of an iron-sulfur phase with 6 nearest S neighbors about Fe at an average distance of 2.24(1) {angstrom}, whereas the brown precipitates are an iron-oxygen-sulfur phase with 6 nearest O neighbors about Fe at an average distance of 1.95(1) {angstrom}.
Date:
December 20, 1999
Creator:
Antonio, M. R.; Tischler, M. L. & Witzcak, D.
Object Type:
Article
System:
The UNT Digital Library
Glass, Plastic and Semiconductors: Packaging Techniques for Miniature Optoelectric Components
At Lawrence Livermore National Laboratory, they have extensive experience with the design and development of miniature photonic systems which require novel packaging schemes. Over the years they have developed silicon micro-optical benches to serve as a stable platform for precision mounting of optical and electronic components. They have developed glass ball lenses that can be fabricated in-situ on the microbench substrate. They have modified commercially available molded plastic fiber ribbon connectors (MT) and added thin film multilayer semiconductor coatings to create potentially low-cost wavelength combiners and wavelength selective filters. They have fabricated both vertical-cavity and in-plane semiconductor lasers and amplifiers, and have packaged these and other components into several miniature photonics systems. For example, they have combined the silicon optical bench with standard electronic packaging techniques and the custom-made wavelength-selective filters to develop a four-wavelength wavelength-division-multiplexing transmitter module mounted in a standard 120-pin ceramic PGA package that couples light from several vertical-cavity-surface-emitting-laser arrays into one multimode fiber-ribbon array. The coupling loss can be as low as 2dB, and the transmitters can be operated at over 1.25 GHz. While these systems were not designed for biomedical or environmental applications, the concepts and techniques are general and widely applicable.
Date:
December 20, 1999
Creator:
Pocha, M. D.; Garrett, H. E.; Patel, R. R.; Jones, L. M., II; Larson, M. C.; Emanuel, M. A. et al.
Object Type:
Article
System:
The UNT Digital Library
[Harnessing Guidelines and Planners - A Glimpse within an Email Frame]
A document about the crucial dance of guidelines and unit planners orchestrating event efficiency, illuminating the path to flawless execution.
Date:
December 20, 1999, 4:48 p.m.
Creator:
unknown
Object Type:
Letter
System:
The UNT Digital Library
The influence of desulfovibrio desulfuricans on neptunium chemistry.
The role of biotic Np(V) reduction is studied in light of its potential role in the environmental immobilization of this hazardous radionuclide. The speciation of Np in Desulfovibrio desulfuricans cultures is compared with Np speciation in the spent medium and in the uninoculated medium. Precipitates formed in all three samples. Optical spectroscopy and X-ray absorption near edge structure (XANES) were used to determine that Np(V) is almost quantitatively reduced in all three samples and that the precipitate is an amorphous Np(IV) species. These results demonstrate that the reduction of Np is independent of Desulfovibrio desulfuricans. The underlying chemistry associated with these results is discussed.
Date:
December 20, 1999
Creator:
Soderholm, L.; Williams, C.; Antonio, M. R.; Tischler, M. L. & Markos, M.
Object Type:
Article
System:
The UNT Digital Library
Influence of Processing Method on the Grain Boundary Character Distribution and Network Connectivity
There exists a growing body of literature that correlates the fraction of ''special'' boundaries in a microstructure, as described by the Coincident Site Lattice Model, to properties such as corrosion resistance, intergranular stress corrosion cracking, creep, etc. Several studies suggest that the grain boundary character distribution (GBCD), which is defined in terms of the relative fractions of ''special'' and ''random'' grain boundaries, can be manipulated through thermomechanical processing. This investigation evaluates the influence of specific thermomechanical processing methods on the resulting GBCD in FCC materials such as oxygen-free electronic (ofe) copper and Inconel 600. We also demonstrate that the primary effect of thermomechanical processing is to reduce or break the connectivity of the random grain boundary network. Samples of ofe Cu were subjected to a minimum of three different deformation paths to evaluate the influence of deformation path on the resulting GBCD. These include: rolling to 82% reduction in thickness, compression to 82% strain, repeated compression to 20% strain followed by annealing. In addition, the influence of annealing temperature was probed by applying, for each of the processes, three different annealing temperatures of 400, 560, and 800 C. The observations obtained from automated electron backscatter diffraction (EBSD) characterization of the …
Date:
December 20, 1999
Creator:
Kumar, M & King, W.E.
Object Type:
Article
System:
The UNT Digital Library
Military Base Closures: Lack of Data Inhibits Cost-Effectiveness of Analyses of Privatization-in Place Initiatives
A letter report issued by the General Accounting Office with an abstract that begins "Pursuant to a congressional request concerning the privatization in place of select Department of Defense industrial facilities, GAO focused on: (1) determining how contractors are responding to decreasing workloads at these privatized facilities; (2) comparing the cost-effectiveness of the privatization-in-place operations to the former government-run operations; and (3) identifying the impact of privatization on excess capacity in the Department's industrial infrastructure."
Date:
December 20, 1999
Creator:
United States. General Accounting Office.
Object Type:
Report
System:
The UNT Digital Library
[Notes: Interview with Andrea Hilderbrand GLAD]
A document with an interview of Andrea Hilderbrand, director of the GLBTQ Legal Advocates & Defenders (GLAD) in Boston.
Date:
December 20, 1999
Creator:
unknown
Object Type:
Text
System:
The UNT Digital Library
Nuclear structure of the Cd and Te nuclei: Akin to tin or a breed apart?
Many of the {sub 48}Cd nuclei are good examples of U(5) or vibrational nuclei. Like the {sub 50}Sn nuclei and others in the region, states exist which are interpreted in terms of the excitation of a pair of protons across the shell gap (intruders). The features of the comparatively well-understood Cd nuclei will be considered and compared with the{sub 52}Te nuclei where intruders have not been identified experimentally and problems exist with the U(5) interpretation.
Date:
December 20, 1999
Creator:
Garrett, P E; Warr, N & Hicks, S F
Object Type:
Article
System:
The UNT Digital Library
Performance of a high-resolution x-ray microprobe at the Advanced Photon Source.
The authors have developed a x-ray microprobe in the energy region from 6 to 20 keV using undulator radiation and zone-plate optics for microfocusing-based techniques and applications at a beamline at the Advanced Photon Source (APS). The performance of the beamline was shown to meet the design objectives, including preservation of the source brilliance and coherence, selectable transverse coherence length and energy bandwidth, high angular stability, and harmonic suppression of the beam. These objectives were achieved by careful thermal management and use of a novel mirror and crystal monochromator cooling geometry. All beamline optical components are water cooled, and the x-ray beam in the experiment station is stable in beam intensity, energy, and position over many days with no active feedback. Using a double-crystal Si(111) monochromator, they have obtained a focal spot size (FWHM) of 0.15 {micro}m (v) x 1.0 {micro}m (h), and a photon flux of 4 x 10{sup 9} photons/sec at the focal spot, and thus a photon flux density gain of 15,000. A circular beam spot of 0.15 {micro}m in diameter can be achieved by reducing the horizontal source size using a white beam slit located 43.5 meters upstream of the zone plate, with an order of …
Date:
December 20, 1999
Creator:
Cai, Z.; Lai, B.; Yun, W.; McNulty, I.; Khounsary, A.; Maser, J. et al.
Object Type:
Article
System:
The UNT Digital Library
Performance of hard X-ray zone plates at the Advanced Photon Source
Fresnel zone plates have been highly successful as focusing and imaging optics for soft x-ray microscopes and microprobe. More recently, with the advent of third-generation high-energy storage rings, zone plates for the hard x-ray regime have been put to use as well. The performance of zone plates manufactured using a combination of electron-beam lithography and x-ray lithography is described.
Date:
December 20, 1999
Creator:
Maser, J.; Lai, B.; Cai, Z.; Rodrigues, W.; Legnini, D.; Ilinski, P. et al.
Object Type:
Article
System:
The UNT Digital Library
Perry Daily Journal (Perry, Okla.), Vol. 106, No. 247, Ed. 1 Monday, December 20, 1999
Daily newspaper from Perry, Oklahoma that includes local, state, and national news along with advertising.
Date:
December 20, 1999
Creator:
Brown, Gloria
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Prediction of Gas Injection Performance for Heterogeneous Reservoirs
This report describes research carried out in the Department of Petroleum Engineering at Stanford University from September 1998 - September 1998 under the third year of a three-year Department of Energy (DOE) grant on the ''Prediction of Gas Injection Performance for Heterogeneous Reservoirs''. The research effort is an integrated study of the factors affecting gas injection, from the pore scale to the field scale, and involves theoretical analysis, laboratory experiments and numerical simulation. The research is divided into four main areas: (1) Pore scale modeling of three-phase flow in porous media; (2) Laboratory experiments and analysis of factors influencing gas injection performance at the core scale with an emphasis on the fundamentals of three-phase flow; (3) Benchmark simulations of gas injection at the field scale; and (4) Development of streamline-based reservoir simulator.
Date:
December 20, 1999
Creator:
Blunt, Martin J. & Franklin M. Orr Jr.
Object Type:
Report
System:
The UNT Digital Library
[Press Release: Courts grants equal benefits and protections of marriage to same-sex couples]
A press release from the Gay and Lesbian Advocates and Defenders of Boston announcing Vermont Supreme Court's ruling in same-sex marriage having equal protection as opposite-sex marriage.
Date:
December 20, 1999
Creator:
unknown
Object Type:
Text
System:
The UNT Digital Library
[Press Release: Huge Victory in Vermont - State Supreme Court rules same-sex couples entitled to equal benefits and protections]
A press release from the Human Rights Campaign Foundation announcing the Vermont Supreme Court granting same-sex couples equal benefits and protections as opposite-sex couples living in Vermont. The document also urges the Vermont Legislature to legalize same-sex marriage.
Date:
December 20, 1999
Creator:
unknown
Object Type:
Text
System:
The UNT Digital Library
[Press Release: In dramatic first, Vermont High Court orders State to treat gay and non-gay couples equally]
A press release from the Lambda Legal Defense and Education Fund, Inc. announcing the Vermont Supreme Court ruling same-sex couples to have benefits and protections as opposite-sex couples living in Vermont. The document summarizes the court case and its significance towards the LGBT movement.
Date:
December 20, 1999
Creator:
unknown
Object Type:
Text
System:
The UNT Digital Library