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Development of Key Technologies for White Lighting Based on Light-Emitting Diodes (LEDs)

Description: This program was organized to focus on materials development issues critical to the acceleration of solid-state lighting, and was split into three major thrust areas: (1) study of dislocation density reduction for GaN grown on sapphire using 'cantilever epitaxy', and the impact of dislocation density on the performance of state-of-the-art high-power LEDs; (2) the evaluation of in situ techniques for monitoring gas phase chemistry and the properties of GaN-based layers during metal-organic vapor… more
Date: March 31, 2004
Creator: Goetz, Werner; Imler, Bill; Kim, James; Kobayashi, Junko; Kim, Andrew; Krames, Mike et al.
Partner: UNT Libraries Government Documents Department
open access

A robust, coupled approach for atomistic-continuum simulation.

Description: This report is a collection of documents written by the group members of the Engineering Sciences Research Foundation (ESRF), Laboratory Directed Research and Development (LDRD) project titled 'A Robust, Coupled Approach to Atomistic-Continuum Simulation'. Presented in this document is the development of a formulation for performing quasistatic, coupled, atomistic-continuum simulation that includes cross terms in the equilibrium equations that arise due to kinematic coupling and corrections use… more
Date: September 1, 2004
Creator: Aubry, Sylvie; Webb, Edmund Blackburn, III; Wagner, Gregory John; Klein, Patrick A.; Jones, Reese E.; Zimmerman, Jonathan A. et al.
Partner: UNT Libraries Government Documents Department
open access

In-situ scanning probe microscopy of electrodeposited nickel.

Description: The performance characteristics and material properties such as stress, microstructure, and composition of nickel coatings and electroformed components can be controlled over a wide range by the addition of small amounts of surface-active compounds to the electroplating bath. Saccharin is one compound that is widely utilized for its ability to reduce tensile stress and refine grain size in electrodeposited nickel. While the effects of saccharin on nickel electrodeposition have been studied by m… more
Date: October 1, 2004
Creator: Kelly, James J. & Dibble, Dean C.
Partner: UNT Libraries Government Documents Department
open access

Next generation spindles for micromilling.

Description: There exists a wide variety of important applications for micro- and meso-scale mechanical systems in the commercial and defense sectors, which require high-strength materials and complex geometries that cannot be produced using current MEMS fabrication technologies. Micromilling has great potential to fill this void in MEMS technology by adding the capability of free form machining of complex 3D shapes from a wide variety and combination of traditional, well-understood engineering alloys, glas… more
Date: December 1, 2004
Creator: Pathak, Jay P. (Machine Tool Research Center, University of Florida, Gainesville, FL); Payne, Scott W. T. (Machine Tool Research Center, University of Florida, Gainesville, FL); Gill, David Dennis; Ziegert, John C. (Machine Tool Research Center, University of Florida, Gainesville, FL) & Jokiel, Bernhard, Jr.
Partner: UNT Libraries Government Documents Department
open access

Some attributes of a language for property-based testing.

Description: Property-based testing is a testing technique that evaluates executions of a program. The method checks that specifications, called properties, hold throughout the execution of the program. TASpec is a language used to specify these properties. This paper compares some attributes of the language with the specification patterns used for model-checking languages, and then presents some descriptions of properties that can be used to detect common security flaws in programs. This report describes t… more
Date: November 1, 2004
Creator: Neagoe, Vicentiu (University of California, Davis, CA) & Bishop, Matt (University of California, Davis, CA)
Partner: UNT Libraries Government Documents Department
open access

Closure Report for Corrective Action Unit 210: Storage Areas and Contaminated Material, Nevada Test Site, Nevada

Description: Corrective Action Unit 210, Storage Areas and Contaminated Material, is identified in the Federal Facilities Agreement and Consent Order. This Corrective Action Unit consists of four Corrective Action Sites located in Areas 10, 12, and 15 of the Nevada Test Site. This report documents that the closure activities conducted meet the approved closure standards.
Date: June 1, 2004
Creator: United States. National Nuclear Security Administration. Nevada Site Office.
Partner: UNT Libraries Government Documents Department
open access

Potential application of microsensor technology in radioactive waste management with emphasis on headspace gas detection.

Description: Waste characterization is probably the most costly part of radioactive waste management. An important part of this characterization is the measurements of headspace gas in waste containers in order to demonstrate the compliance with Resource Conservation and Recovery Act (RCRA) or transportation requirements. The traditional chemical analysis methods, which include all steps of gas sampling, sample shipment and laboratory analysis, are expensive and time-consuming as well as increasing worker's… more
Date: September 1, 2004
Creator: Davis, Chad Edward; Thomas, Michael Loren; Wright, Jerome L.; Pohl, Phillip Isabio; Hughes, Robert Clark; Wang, Yifeng et al.
Partner: UNT Libraries Government Documents Department
open access

Analysis and control of distributed cooperative systems.

Description: As part of DARPA Information Processing Technology Office (IPTO) Software for Distributed Robotics (SDR) Program, Sandia National Laboratories has developed analysis and control software for coordinating tens to thousands of autonomous cooperative robotic agents (primarily unmanned ground vehicles) performing military operations such as reconnaissance, surveillance and target acquisition; countermine and explosive ordnance disposal; force protection and physical security; and logistics support.… more
Date: September 1, 2004
Creator: Feddema, John Todd; Parker, Eric Paul; Wagner, John S. & Schoenwald, David Alan
Partner: UNT Libraries Government Documents Department
open access

Medical waste management plan.

Description: This plan describes the process for managing research generated medical waste at Sandia National Laboratories/California. It applies to operations at the Chemical and Radiation Detection Laboratory (CRDL), Building 968, and other biosafety level 1 or 2 activities at the site. It addresses the accumulation, storage, treatment and disposal of medical waste and sharps waste. It also describes the procedures to comply with regulatory requirements and SNL policies applicable to medical waste.
Date: December 1, 2004
Creator: Lane, Todd W. & VanderNoot, Victoria A.
Partner: UNT Libraries Government Documents Department
open access

Temperature rise of the mask-resist assembly during LIGA exposure.

Description: Deep X-ray lithography on PMMA resist is used in the LIGA process. The resist is exposed to synchrotron X-rays through a patterned mask and then is developed in a liquid developer to make high aspect ratio microstructures. The limitations in dimensional accuracies of the LIGA generated microstructure originate from many sources, including synchrotron and X-ray physics, thermal and mechanical properties of mask and resist, and from the kinetics of the developer. This work addresses the thermal a… more
Date: November 1, 2004
Creator: Ting, Aili
Partner: UNT Libraries Government Documents Department
open access

Estimation of the parameter covariance matrix for aone-compartment cardiac perfusion model estimated from a dynamic sequencereconstructed using map iterative reconstruction algorithms

Description: In dynamic cardiac SPECT estimates of kinetic parameters ofa one-compartment perfusion model are usually obtained in a two stepprocess: 1) first a MAP iterative algorithm, which properly models thePoisson statistics and the physics of the data acquisition, reconstructsa sequence of dynamic reconstructions, 2) then kinetic parameters areestimated from time activity curves generated from the dynamicreconstructions. This paper provides a method for calculating thecovariance matrix of the kinetic p… more
Date: January 1, 2004
Creator: Gullberg, Grant T.; Huesman, Ronald H.; Reutter, Bryan W.; Qi,Jinyi & Ghosh Roy, Dilip N.
Partner: UNT Libraries Government Documents Department
open access

Tropical Warm Pool International Cloud Experiment (TWP-ICE): Cloud and Rain Characteristics in the Australian Monsoon

Description: The impact of oceanic convection on its environment and the relationship between the characteristics of the convection and the resulting cirrus characteristics is still not understood. An intense airborne measurement campaign combined with an extensive network of ground-based observations is being planned for the region near Darwin, Northern Australia, during January-February, 2006, to address these questions. The Tropical Warm Pool – International Cloud Experiment (TWP-ICE) will be the first f… more
Date: May 30, 2004
Creator: May, P. T.; Jakob, C. & Mather, J. H.
Partner: UNT Libraries Government Documents Department
open access

Alignment of the MINOS FD

Description: The results and procedure of the alignment of the MINOS Far Detector are presented. The far detector has independent alignments of SM1 and SM2. The misalignments have an estimated uncertainty of {approx}850 {micro}m for SM1 and {approx}750 {micro}m for SM2. The alignment has as inputs the average rotations of U and V as determined by optical survey and strip positions within modules measured from the module mapper. The output of this is a module-module correction for transverse mis-alignments. … more
Date: November 1, 2004
Creator: Becker, B. & Boehnlein, D.
Partner: UNT Libraries Government Documents Department
open access

Scalable fault tolerant algorithms for linear-scaling coupled-cluster electronic structure methods.

Description: By means of coupled-cluster theory, molecular properties can be computed with an accuracy often exceeding that of experiment. The high-degree polynomial scaling of the coupled-cluster method, however, remains a major obstacle in the accurate theoretical treatment of mainstream chemical problems, despite tremendous progress in computer architectures. Although it has long been recognized that this super-linear scaling is non-physical, the development of efficient reduced-scaling algorithms for ma… more
Date: October 1, 2004
Creator: Leininger, Matthew L.; Nielsen, Ida Marie B. & Janssen, Curtis L.
Partner: UNT Libraries Government Documents Department
open access

Validation data for models of contaminant dispersal : scaling laws and data needs.

Description: Contaminant dispersal models for use at scales ranging from meters to miles are widely used for planning sensor locations, first-responder actions for release scenarios, etc. and are constantly being improved. Applications range from urban contaminant dispersal to locating buried targets from an exhaust signature. However, these models need detailed data for model improvement and validation. A small Sandia National Laboratories Laboratory Directed Research and Development (LDRD) program was fun… more
Date: September 1, 2004
Creator: O'Hern, Timothy John & Ceccio, Steven Louis (University of Michigan, Ann Arbor, MI)
Partner: UNT Libraries Government Documents Department
open access

Solution Verification Linked to Model Validation, Reliability, and Confidence

Description: The concepts of Verification and Validation (V&V) can be oversimplified in a succinct manner by saying that 'verification is doing things right' and 'validation is doing the right thing'. In the world of the Finite Element Method (FEM) and computational analysis, it is sometimes said that 'verification means solving the equations right' and 'validation means solving the right equations'. In other words, if one intends to give an answer to the equation '2+2=', then one must run the resulting… more
Date: June 16, 2004
Creator: Logan, R W & Nitta, C K
Partner: UNT Libraries Government Documents Department
open access

P3 microengine development at Washington State University.

Description: There is a pressing need for miniaturized power systems for a variety of applications requiring a long life in the field of operations. Such power systems are required to be capable of providing power for months to years of operation, which all but eliminates battery technologies and technologies that bring their own fuel systems (except for nuclear fuel systems, which have their own drawbacks) due to constraints of having the all of the chemical fuel necessary for the entire life of the operat… more
Date: December 1, 2004
Creator: Whalen, Scott (Washington State University, Pullman, WA) & Apblett, Christopher Alan
Partner: UNT Libraries Government Documents Department
open access

Matrixed business support comparison study.

Description: The Matrixed Business Support Comparison Study reviewed the current matrixed Chief Financial Officer (CFO) division staff models at Sandia National Laboratories. There were two primary drivers of this analysis: (1) the increasing number of financial staff matrixed to mission customers and (2) the desire to further understand the matrix process and the opportunities and challenges it creates.
Date: November 1, 2004
Creator: Parsons, Josh D.
Partner: UNT Libraries Government Documents Department
open access

Final report : compliant thermo-mechanical MEMS actuators, LDRD #52553.

Description: Thermal actuators have proven to be a robust actuation method in surface-micromachined MEMS processes. Their higher output force and lower input voltage make them an attractive alternative to more traditional electrostatic actuation methods. A predictive model of thermal actuator behavior has been developed and validated that can be used as a design tool to customize the performance of an actuator to a specific application. This tool has also been used to better understand thermal actuator reli… more
Date: December 1, 2004
Creator: Walraven, Jeremy Allen; Baker, Michael Sean; Headley, Thomas Jeffrey & Plass, Richard Anton
Partner: UNT Libraries Government Documents Department
open access

A Novel Treatment for Acid Mine Drainage Utilizing Reclaimed Limestone Residual

Description: The viability of utilizing Reclaimed Limestone Residual (RLR) to remediate Acid Mine Drainage (AMD) was investigated. Physical and chemical characterization of RLR showed that it is composed of various minerals that contain significant quantities of limestone or calcium bearing compounds that can be exploited for acid neutralization. Acid Neutralization Potential (ANP) test results showed that RLR has a neutralization potential of approximately 83% as calcium carbonate (CaCO{sub 3}). Neutraliza… more
Date: August 31, 2004
Creator: Moo-Young, Horace K. & Ochola, Charles E.
Partner: UNT Libraries Government Documents Department
open access

Advance Abrasion Resistant Materials for Mining

Description: The high-density infrared (HDI) transient-liquid coating (TLC) process was successfully developed and demonstrated excellent, enhanced (5 times higher than the current material and process) wear performance for the selected functionally graded material (FGM) coatings under laboratory simulated, in-service conditions. The mating steel component exhibited a wear rate improvement of approximately one and a half (1.5) times. After 8000 cycles of. wear testing, the full-scale component testing demon… more
Date: June 1, 2004
Creator: Mackiewicz-Ludtka, G.
Partner: UNT Libraries Government Documents Department
open access

Meso-scale controlled motion for a microfluidic drop ejector.

Description: The objective of this LDRD was to develop a uniquely capable, novel droplet solution based manufacturing system built around a new MEMS drop ejector. The development all the working subsystems required was completed, leaving the integration of these subsystems into a working prototype still left to accomplish. This LDRD report will focus on the three main subsystems: (1) MEMS drop ejector--the MEMS ''sideshooter'' effectively ejected 0.25 pl drops at 10 m/s, (2) packaging--a compact ejector pac… more
Date: December 1, 2004
Creator: Galambos, Paul C.; Givler, Richard C.; Pohl, Kenneth Roy; Czaplewski, David A.; Luck, David L.; Braithwaite, Mark J. et al.
Partner: UNT Libraries Government Documents Department
open access

Delaware Basin Monitoring Annual Report

Description: The Delaware Basin Drilling Surveillance Program (DBDSP) is designed to monitor drilling activities in the vicinity of the Waste Isolation Pilot Plant (WIPP). This program is based on Environmental Protection Agency (EPA) requirements. The EPA environmental standards for the management and disposal of transuranic (TRU) radioactive waste are codified in 40 CFR Part 191 (EPA 1993). Subparts B and C of the standard address the disposal of radioactive waste. The standard requires the Department of … more
Date: September 30, 2004
Creator: Washington Regulatory and Environmental Services
Partner: UNT Libraries Government Documents Department
open access

Red River Wildlife Management Area HEP Report, Habitat Evaluation Procedures, Technical Report 2004.

Description: A habitat evaluation procedures (HEP) analysis conducted on the 314-acre Red River Wildlife Management Area (RRWMA) managed by the Idaho Department of Fish and Game resulted in 401.38 habitat units (HUs). Habitat variables from six habitat suitability index (HSI) models, comprised of mink (Mustela vison), mallard (Anas platyrhynchos), common snipe (Capella gallinago), black-capped chickadee (Parus altricapillus), yellow warbler (Dendroica petechia), and white-tailed deer (Odocoileus virginianus… more
Date: November 1, 2004
Creator: Ashley, Paul
Partner: UNT Libraries Government Documents Department
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