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[News Clip: Child watch]

Description: Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.
Date: February 27, 1996, 10:00 p.m.
Duration: 1 minute 27 seconds
Creator: KXAS-TV (Television station : Fort Worth, Tex.)
Partner: UNT Libraries Special Collections
open access

Chaotic behavior control in fluidized bed systems using artificial neural network. Quarterly progress report, October 1, 1996--December 31, 1996

Description: Pressurized fluidized-bed combustors (FBC) are becoming very popular, efficient, and environmentally acceptable replica for conventional boilers in Coal-fired and chemical plants. In this paper, we present neural network-based methods for chaotic behavior monitoring and control in FBC systems, in addition to chaos analysis of FBC data, in order to localize chaotic modes in them. Both of the normal and abnormal mixing processes in FBC systems are known to undergo chaotic behavior. Even though, t… more
Date: February 27, 1996
Creator: Bodruzzaman, M. & Essawy, M.A.
Partner: UNT Libraries Government Documents Department
open access

TCP performance in ATM networks: ABR parameter tuning and ABR/UBR comparisons

Description: This paper explores two issues on TOP performance over ATM networks: ABR parameter tuning and performance comparison of binary mode ABR with enhanced UBR services. Of the fifteen parameters defined for ABR, two parameters dominate binary mode ABR performance: Rate Increase Factor (RIF) and Rate Decrease Factor (RDF). Using simulations, we study the effects of these two parameters on TOP over ABR performance. We compare TOP performance with different ABR parameter settings in terms of through-pu… more
Date: February 27, 1996
Creator: Chien Fang & Lin, A.
Partner: UNT Libraries Government Documents Department
open access

Remote nuclear screening system for hostile environments

Description: A remote measurement system has been constructed for in situ gamma and beta isotopic characterization of highly radioactive nuclear material in hostile environments. A small collimated, planar CdZnTe detector is used for gamma-ray spectroscopy. Spectral resolution of 2% full width at half maximum at 662 kiloelectronvolts has been obtained remotely using rise time compensation and limited pulse shape discrimination, Isotopc measurement of high-energy beta emitters was accomplished with a ruggedi… more
Date: February 27, 1996
Creator: Addleman, R. S.; Beck, M. A.; Blewett, G. R.; Selle, E. R.; McClellan, C. S.; Dodd, D. A. et al.
Partner: UNT Libraries Government Documents Department
open access

Degradation kinetics of polymers in solution: Time-dependence of molecular weight distributions. [Quarterly report, January--March 1996]

Description: Polymer degradation occurs when polymer chains are broken under the influence of thermal, mechanical, or chemical energy. Chain-end depolymerization and random- and midpoint-chain scission are mechanisms that have been observed in liquid-phase polymer degradation. Here we develop mathematical models, unified by continuous-mixture kinetics, to show how these different mechanisms affect polymer degradation in solution. Rate expressions for the fragmentation of molecular-weight distributions (MWDs… more
Date: February 27, 1996
Creator: McCoy, B.J. & Madras, G.
Partner: UNT Libraries Government Documents Department
open access

Reverse VSP and crosswell seismic imaging at the Savannah River Site

Description: Analysis of crosswell and three-component seismic data integrated with well logs have produced information on the distribution of subsurface heterogeneities below the In-Tank Precipitation facility at the Savannah River Site (SRS). The travel time P-wave tomogram and reflection imaging delineate lateral and vertical structural details of the formations. In particular, the high-resolution P-wave tomogram captures a low-velocity zone within the carbonates. This zone is surrounded by reflection ev… more
Date: February 27, 1996
Creator: Cumbest, R.J.; Parra, J.O.; Zook, B.J.; Addington, C. & Price, V.
Partner: UNT Libraries Government Documents Department
open access

Special properties of optical parametric oscillators

Description: Optical parametric oscillators (OPOS) are useful devices to generate tunable radiation. The tuning characteristics of OPOs can lead to their utility in remote sensing applications. We have investigated injection-seeded OPOs to generate narrow-band Mid-JR radiation for this purpose. OPOs exhibit a resonance structure similar to that of a laser`s cavity limiting the frequency choices available. Also, the coupling of the electric fields of the three interacting waves can generate cavity resonances… more
Date: February 27, 1996
Creator: Neuman, W.A. & Velski, S.P.
Partner: UNT Libraries Government Documents Department
open access

Low sample volume part-per billion level ion chromatographic analysis

Description: ADS has developed an ion chromatographic method which enables low part-per-billion levels of analysis while minimizing liquid waste generation. This method incorporates several recent technical improvements in ion chromatographic instrumentation to achieve a ten- fold increase in sensitivity over existing ion chromatographic methods without additional analysis time or sample pre-concentration. This report outlines the method, establishes the precision and accuracy levels, and discusses the appl… more
Date: February 27, 1996
Creator: Ekechukwu, A.A.
Partner: UNT Libraries Government Documents Department
open access

Evaluating the importance of innovative heterogeneous chemistry to explain observed stratospheric ozone depletion

Description: Currently, there is a widespread search for additional heterogeneous reactions or combination of heterogeneous and homogeneous (gas-phase) reactions that could catalytically reduce ozone to observed levels. In 1992, Burley and Johnston proposed that nitrosyl sulfuric acid (NSA) NOHSO{sub 4}, is a promising heterogeneous reactant for activating HCl in sulfuric acid particles. They list several sources for producing it in the stratosphere and they carried out thermodynamic and chemical kinetic ca… more
Date: February 27, 1996
Creator: Kinnison, D. E. & Connell, P. S.
Partner: UNT Libraries Government Documents Department
open access

Mutual reciprocal inspections: Issues regarding next steps

Description: Pressures are mounting for a regime to verify the dismantlement of US and Russian warheads, as well as a system of international control over the weapons` fissile materials to assure irreversibility. There are at least four motivating factors for these measures: (1) as the United States and Russia lower their numbers of nuclear weapons, each side seeks assurance that the warheads are actually being dismantled; (2) by accounting for the fissile materials and placing them under effective controls… more
Date: February 27, 1996
Creator: Bailey, K. C.
Partner: UNT Libraries Government Documents Department
open access

Development of design basis capacity for SNF project systems

Description: An estimate of the design capacity for Spent Nuclear Fuel Project systems producing Multi-Canister Overpacks is developed based on completing fuel processing in a two year period. The design basis capacity for systems relates the desired annual processing rate to potential operating inefficiencies which may be actually experienced to project a design capacity for systems. The basis for estimating operating efficiency factors is described. Estimates of the design basis capacity were limited to s… more
Date: February 27, 1996
Creator: Pajunen, A.L.
Partner: UNT Libraries Government Documents Department
open access

Electrical test structures replicated in silicon-on-insulator material

Description: Measurements of the linewidths of submicrometer features made by different metrology techniques have frequently been characterized by differences of up to 90 nm. The purpose of the work reported here is to address the special difficulties that this phenomenon presents to the certification of reference materials for the calibration of linewidth-measurement instruments. Accordingly, a new test structure has been designed, fabricated, and undergone preliminary tests. Its distinguishing characteris… more
Date: February 27, 1996
Creator: Cresswell, M. W.; Ghoshtagore, R. N.; Allen, R. A.; Linholm, L. W.; Villarrubia, J. S. & Sniegowski, J. J.
Partner: UNT Libraries Government Documents Department
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