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153
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Reflectance Infrared Spectroscopy on Operating Surface Acoustic Wave Chemical Sensors During Exposure to Gas-Phase Analytes
We have developed instrumentation to enable the combination of surface acoustic wave (SAW) sensor measurements with direct, in-situ molecular spectroscopic measurements to understand the response of the SAW sensors with respect to the interfacial chemistry of surface-confined sensing films interacting with gas-phase analytes. Specifically, the instrumentation and software was developed to perform in-situ Fourier-transform infrared external-reflectance spectroscopy (FTIR-ERS) on operating SAW devices during dosing of their chemically modified surfaces with analytes. By probing the surface with IR spectroscopy during gas exposure, it is possible to understand in unprecedented detail the interaction processes between the sorptive SAW coatings and the gaseous analyte molecules. In this report, we provide details of this measurement system, and also demonstrate the utility of these combined measurements by characterizing the SAW and FTIR-ERS responses of organic thin-film sensor coatings interacting with gas-phase analytes.
Date:
January 11, 1999
Creator:
Hierlemann, A.; Hill, M.; Ricco, A.J.; Staton, A.W. & Thomas, R.C.
Object Type:
Article
System:
The UNT Digital Library
Reliability and Lifetime Prediction for Ceramic Components
Ceramic materials are used extensively in non-nuclear components in the weapons stockpile including neutron tubes, stronglinks, weaklinks, batteries, and current/voltage stacks. Ceramics also perform critical functions in electronics, passively as insulators and actively as resistors and capacitors, Glass and ceramic seals also provide hermetic electrical feedthrus in connectors for many weapons components.
Date:
January 11, 1999
Creator:
Vedula, V. R.; Glass, S. J.; Monroe, S. L.; Neilsen, M. K. & Newton, C.
Object Type:
Article
System:
The UNT Digital Library
Sapulpa Daily Herald (Sapulpa, Okla.), Vol. 84, No. 102, Ed. 1 Monday, January 11, 1999
Daily newspaper from Sapulpa, Oklahoma that includes local, state, and national news along with advertising.
Date:
January 11, 1999
Creator:
Horn, Richard A.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Town Tattler (Electra, Tex.), Vol. 67, No. 2, Ed. 1 Monday, January 11, 1999
Weekly newspaper from Electra, Texas that includes local and regional news along with advertising.
Date:
January 11, 1999
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
Transport, Growth Mechanisms, and Material Quality in GaN Epitaxial Lateral Overgrowth
Growth kinetics, mechanisms, and material quality in GaN epitaxial lateral over-growth (ELO) were examined using a single mask of systematically varied patterns. A 2-D gas phase reaction/diffusion model describes how transport of the Ga precursor to the growth surface enhances the lateral rate in the early stages of growth. In agreement with SEM studies of truncated growth runs, the model also predicts the dramatic decrease in the lateral rate that occurs as GaN over-growth reduces the exposed area of the mask. At the point of convergence, a step-flow coalescence mechanism is observed to fill in the area between lateral growth-fronts. This alternative growth mode in which a secondary growth of GaN is nucleated along a single convergence line, may be responsible for producing smooth films observed to have uniform cathodoluminescence (CL) when using 1{micro}m nucleation zones. Although emission is comprised of both UV ({approximately}365nm) and yellow ({approximately}550nm) components, the spectra suggest these films have reduced concentrations of threading dislocations normally associated with non-radiative recombination centers and defects known to accompany growth-front convergence lines.
Date:
January 11, 1999
Creator:
Baca, Albert G.; Bartram, M. E.; Coltrin, M. E.; Crawford, M. H.; Han, J.; Missert, N. et al.
Object Type:
Article
System:
The UNT Digital Library
The Albany News (Albany, Tex.), Vol. 123, No. 37, Ed. 1 Thursday, February 11, 1999
Weekly newspaper from Albany, Texas that includes local, county, and state news along with extensive advertising.
Date:
February 11, 1999
Creator:
Lucas, Donnie A.
Object Type:
Newspaper
System:
The Portal to Texas History
Altus Times (Altus, Okla.), Vol. 99, No. 285, Ed. 1 Thursday, February 11, 1999
Daily newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.
Date:
February 11, 1999
Creator:
Cole, Carol
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Appropriations Bills: What are "General Provisions"?
An annual appropriations act generally consists of two parts – paragraphs providing funding, and general provisions focusing on non-funding as well as funding issues. Discussed on this brief fact sheet are what is found in general provisions of appropriations bills.
Date:
February 11, 1999
Creator:
Streeter, Sandy
Object Type:
Report
System:
The UNT Digital Library
The Baytown Sun (Baytown, Tex.), Vol. 77, No. 89, Ed. 1 Thursday, February 11, 1999
Daily newspaper from Baytown, Texas that includes local, state, and national news along with advertising.
Date:
February 11, 1999
Creator:
Dobbs, Gary
Object Type:
Newspaper
System:
The Portal to Texas History
Bogata News (Bogata, Tex.), Vol. 88, No. 40, Ed. 1 Thursday, February 11, 1999
Weekly newspaper from Bogata, Texas that includes local, state, and national news along with advertising.
Date:
February 11, 1999
Creator:
Nichols, Nanalee & Nichols, Thomas
Object Type:
Newspaper
System:
The Portal to Texas History
The Canadian Record (Canadian, Tex.), Vol. 109, No. 57, Ed. 1 Thursday, February 11, 1999
Weekly newspaper from Canadian, Texas that includes local, state and national news along with extensive advertising.
Date:
February 11, 1999
Creator:
Ezzell, Nancy & Brown, Laurie Ezzell
Object Type:
Newspaper
System:
The Portal to Texas History
Cherokeean/Herald (Rusk, Tex.), Vol. 149, No. 51, Ed. 1 Thursday, February 11, 1999
Weekly newspaper from Rusk, Texas that includes local, state and national news along with extensive advertising.
Date:
February 11, 1999
Creator:
Whitehead, Marie
Object Type:
Newspaper
System:
The Portal to Texas History
Coast Guard: Key Budget Issues for Fiscal Years 1999 and 2000
Testimony issued by the General Accounting Office with an abstract that begins "Pursuant to a congressional request, GAO discussed the Coast Guard's budgets for fiscal years 1999 and 2000, focusing on the: (1) Coast Guard's progress in justifying the Deepwater Replacement Project and addressing GAO's concerns about its affordability; (2) Coast Guard's plans for spending its fiscal year (FY) 1999 emergency funds; and (3) budget strategies the agency may have to consider in the future to address continuing budget constraints."
Date:
February 11, 1999
Creator:
United States. General Accounting Office.
Object Type:
Text
System:
The UNT Digital Library
Cooper Review (Cooper, Tex.), Vol. 119, No. 6, Ed. 1 Thursday, February 11, 1999
Weekly newspaper from Cooper, Texas that includes local, state, and national news along with advertising.
Date:
February 11, 1999
Creator:
Kisic, Theresa
Object Type:
Newspaper
System:
The Portal to Texas History
Customs Service Modernization: Ineffective Software Development Processes Increase Customs System Development Risks
A chapter report issued by the General Accounting Office with an abstract that begins "Pursuant to a congressional request, GAO reviewed the Customs Service's software development maturity and improvement activities, focusing on: (1) the maturity of Customs' software development processes; and (2) whether Customs has an effective software process improvement program."
Date:
February 11, 1999
Creator:
United States. General Accounting Office.
Object Type:
Report
System:
The UNT Digital Library
Department of Energy: Status of Carryover Balances in the Energy Conservation Program
Testimony issued by the General Accounting Office with an abstract that begins "Pursuant to a congressional request, GAO discussed: (1) the level of carryover balances held by the Department of Energy's (DOE) Energy Conservation Program and the trend of these balances since fiscal year (FY) 1997; and (2) its methodology for determining the amount of carryover balances that may be available to reduce DOE's budget requests and how it differs from the methodology used by DOE."
Date:
February 11, 1999
Creator:
United States. General Accounting Office.
Object Type:
Text
System:
The UNT Digital Library
The Dublin Citizen (Dublin, Tex.), Vol. 9, No. 23, Ed. 1 Thursday, February 11, 1999
Weekly newspaper from Dublin, Texas that includes local, state, and national news along with advertising.
Date:
February 11, 1999
Creator:
Wright, Karen
Object Type:
Newspaper
System:
The Portal to Texas History
Earmarks and Limitations in Appropriations Bills
An annual appropriations act is generally made up of separate paragraphs, each of which provides funding for specific agencies and programs. Generally, each paragraph corresponds to a unique account and provides appropriations for multiple projects and purposes as a single lump sum. Earmarks and limitations are two devices regularly used in annual appropriations acts to restrict, or more precisely direct, the availability of funds for specific projects or purposes of an account. Sometimes an earmark or a limitation may generate more interest or controversy than the total appropriation.
Date:
February 11, 1999
Creator:
Streeter, Sandy
Object Type:
Report
System:
The UNT Digital Library
Electra Star-News (Electra, Tex.), Vol. 94, No. 26, Ed. 1 Thursday, February 11, 1999
Weekly newspaper from Electra, Texas that includes local, state, and national news along with advertising.
Date:
February 11, 1999
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
Environmental Assessment and Finding of No Significant Impact: Widening Trench 36 of the 218-E-12B Low-Level Burial Ground, Hanford Site, Richland, Washington
This environmental assessment was prepared to assess potential environmental impacts associated with the proposed action to widen and operate unused Trench 36 in the 218-E-12B Low-Level Burial Ground for disposal of low-level waste. Information contained herein will be used by the Manager, U.S. Department of Energy, Richland Operations Office, to determine if the Proposed Action is a major federal action significantly affecting the quality of the human environment. If the Proposed Action is determined to be major and significant, an environmental impact statement will be prepared. If the Proposed Action is determined not to be major and significant, a Finding of No Significant Impact will be issued and the action may proceed. Criteria used to evaluate significance can be found in Title 40, Code of Federal Regulations 1508.27. This environmental assessment was prepared in compliance with the ''National Environmental Policy Act of1969'', as amended, the Council on Environmental Quality Regulations for Implementing the Procedural Provisions of ''National Environmental Policy Act'' (Title 40, Code of Federal Regulations 1500-1508), and the U.S. Department of Energy Implementing Procedures for ''National Environmental Polio Act'' (Title 10, Code of Federal Regulations 1021). The following is a description of each section of this environmental assessment. (1) …
Date:
February 11, 1999
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
The Express-Star (Chickasha, Okla.), Ed. 1 Thursday, February 11, 1999
Daily newspaper from Chickasha, Oklahoma that includes local, state, and national news along with advertising.
Date:
February 11, 1999
Creator:
Bush, Kent
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Federal Communications Commission: Direct Broadcast Satellite Public Interest Obligations
Other written product issued by the General Accounting Office with an abstract that begins "Pursuant to a legislative requirement, GAO reviewed the Federal Communications Commission (FCC) new rule on direct broadcast satellite public interest obligations. GAO noted that: (1) the rule would impose requirements on direct broadcast satellite service (DBS) providers to comply with the political broadcast rules of the Communications Act of 1934, as amended, and mandates that the DBS providers reserve between 4 percent and 7 percent of their channel capacity exclusively for noncommercial programming of an educational or informational nature; and (2) FCC complied with applicable requirements in promulgating the rule."
Date:
February 11, 1999
Creator:
United States. General Accounting Office.
Object Type:
Text
System:
The UNT Digital Library
Garber Billings News (Garber, Okla.), Vol. 99, No. 18, Ed. 1 Thursday, February 11, 1999
Weekly newspaper from Garber, Oklahoma that includes local, state, and national news along with advertising.
Date:
February 11, 1999
Creator:
Hogan, Vickie Lee
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Giddings Times & News (Giddings, Tex.), Vol. 109, No. 35, Ed. 1 Thursday, February 11, 1999
Weekly newspaper from Giddings, Texas that includes local, state, and national news along with advertising.
Date:
February 11, 1999
Creator:
Preuss, L. M., III & True, David G.
Object Type:
Newspaper
System:
The Portal to Texas History