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Design of Combustor for Long-Range Ram-Jet Engine and Performance of Rectangular Analog

Design of Combustor for Long-Range Ram-Jet Engine and Performance of Rectangular Analog

Date: January 29, 1954
Creator: Rayle, Warren D & Koch, Richard G
Description: The report describes the design of a piloted combustor intended for a ram-jet engine of long flight range. The unit comprises a large annular basket of V-type cross-section, the inner surface of which is slotted and bent into small V-gutters. At the trailing edge of the basket, eight V-gutters are used to propagate the flame into the main stream. A rectangular analog of this combustor was tested at air-flow conditions corresponding to those that might be obtained during cruise. At these conditions, combustion efficiencies of as much as 90 percent were calculated for the combustor at the design equivalence ratio of 0.52. The performance of the unit was relatively insensitive to mounting and flow variables; the greatest effect on efficiency was that of the manner and location of the fuel injection. A full-scale version of this combustor has been designed for a 48-inch-diameter engine.
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Design of combustor for long-range ram-jet engine and performance of rectangular analog

Design of combustor for long-range ram-jet engine and performance of rectangular analog

Date: January 29, 1954
Creator: Koch, R. G. & Rayle, W. D.
Description: None
Contributing Partner: UNT Libraries Government Documents Department
DESIGN OF COMPUTER EXPERIMENTS FOR IMPROVING AN IMPACT TEST SIMULATION

DESIGN OF COMPUTER EXPERIMENTS FOR IMPROVING AN IMPACT TEST SIMULATION

Date: October 1, 2000
Creator: Hemez, F.M.; Wilson, A.C. & Doebling, S.W.
Description: No abstract prepared.
Contributing Partner: UNT Libraries Government Documents Department
DESIGN OF CONDUCTIVITY CELLS FOR STRONG ELECTROLYTES

DESIGN OF CONDUCTIVITY CELLS FOR STRONG ELECTROLYTES

Date: June 1, 1964
Creator: Propst, R.C.
Description: None
Contributing Partner: UNT Libraries Government Documents Department
The design of cooling ducts with special reference to the boundary layer at the inlet

The design of cooling ducts with special reference to the boundary layer at the inlet

Date: December 1, 1940
Creator: Katzoff, S
Description: None
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Design of coupler for the NSLS-II storage ring superconducting RF cavity

Design of coupler for the NSLS-II storage ring superconducting RF cavity

Date: March 28, 2011
Creator: Yeddulla, M. & Rose, J.
Description: NSLS-II is a 3GeV, 500mA, high brightness, 1 MW beam power synchrotron facility that is designed with four superconducting cavities working at 499.68 MHz. To operate the cavities in over-damped coupling condition, an External Quality Factor (Qext) of {approx}65000 is required. We have modified the existing coupler for the CESR-B cavity which has a Qext of {approx}200,000 to meet the requirements of NSLS-II. CESR-B cavity has an aperture coupler with a coupler 'tongue' connecting the cavity to the waveguide. We have optimized the length, width and thickness of the 'tongue' as well as the width of the aperture to increase the coupling using the three dimensional electromagnetic field solver, HFSS. Several possible designs will be presented. We have modified the coupler of the CESR-B cavity to be used in the storage ring at the NSLS-II project using HFSS and verified using CST Microwave Studio. Using a combination of increasing the length and width of the coupler tongue and increasing the width of the aperture, the external Q of the cavity coupler was decreased to {approx}65000 as required for the design of the NSLS-II storage ring design.
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Design of dielectric accelerator using TE-TM mode converter.

Design of dielectric accelerator using TE-TM mode converter.

Date: August 29, 2002
Creator: Liu, W. & Gai, W.
Description: A new design for X band dielectric accelerator using a TE-TM mode converter has been proposed and studied. It first converts RF from TE to TM mode in a pure metal section, then a tapered transition section is used for high efficiency transmission to the dielectric accelerator section. Because there is no dielectrics near the RF coupler, this scheme has potential to overcome RF breakdown problems near the coupling holes in the dielectric based accelerators, as it happened in the older designs. A detailed design study shows that high conversion efficiency ({approx}100%) can be achieved for both single and dual coupling ports and it is less sensitive to machine errors than previous designs. Another advantage of this design is that it can be made to different modules thus greatly reduce the R&D cycles.
Contributing Partner: UNT Libraries Government Documents Department
Design of dynamic load-balancing tools for parallel applications

Design of dynamic load-balancing tools for parallel applications

Date: January 3, 2000
Creator: Devine, K.D.; Hendrickson, B.A.; Boman, E.G.; St. John, M. & Vaughan, C.T.
Description: The design of general-purpose dynamic load-balancing tools for parallel applications is more challenging than the design of static partitioning tools. Both algorithmic and software engineering issues arise. The authors have addressed many of these issues in the design of the Zoltan dynamic load-balancing library. Zoltan has an object-oriented interface that makes it easy to use and provides separation between the application and the load-balancing algorithms. It contains a suite of dynamic load-balancing algorithms, including both geometric and graph-based algorithms. Its design makes it valuable both as a partitioning tool for a variety of applications and as a research test-bed for new algorithmic development. In this paper, the authors describe Zoltan's design and demonstrate its use in an unstructured-mesh finite element application.
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Design of Electric Drive Vehicle Batteries for Long Life and Low Cost: Robustness to Geographic and Consumer-Usage Variation (Presentation)

Design of Electric Drive Vehicle Batteries for Long Life and Low Cost: Robustness to Geographic and Consumer-Usage Variation (Presentation)

Date: October 1, 2010
Creator: Smith, K.; Markel, T.; Kim, G. H. & Pesaran, A.
Description: This presentation describes a battery optimization and trade-off analysis for Li-ion batteries used in EVs and PHEVs to extend their life and/or reduce cost.
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Design of electrochemical processes for treatment of unusual waste streams

Design of electrochemical processes for treatment of unusual waste streams

Date: January 1, 1998
Creator: Farmer, J.C.
Description: UCRL- JC- 129438 PREPRINT This document was prepared as an account of work sponsored by an agency of the United States Government. Neither the United States Government nor the University of California nor any of their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. Reference herein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise, does not necessarily constitute or imply its endorsement, recommendation, or favoring by the United States Government or the University of California. The views and opinions of authors expressed herein do not necessarily state or reflect those of the United States Government or the University of California, and shall not be used for advertising or product endorsement purposes. Introduction. An overview of work done on the development of three electrochemical processes that meet the specific needs of low- level waste treatment is presented. These technologies include: mediated electrochemical oxidation [I- 4]; bipolar membrane electrodialysis [5]; and electrosorption of carbon aerogel electrodes [6- 9]. Design strategies are presented to assess ...
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Design of Electron and Ion Crabbing Cavities for an Electron-Ion Collider

Design of Electron and Ion Crabbing Cavities for an Electron-Ion Collider

Date: July 1, 2012
Creator: Alejandro Castilla Loeza, Geoffrey Krafft, Jean Delayen
Description: Beyond the 12 GeV upgrade at the Jefferson Lab a Medium Energy Electron-Ion Collider (MEIC) has been considered. In order to achieve the desired high luminosities at the Interaction Points (IP), the use of crabbing cavities is under study. In this work, we will present to-date designs of superconducting cavities, considered for crabbing both ion and electron bunches. A discussion of properties such as peak surface fields and higher-order mode separation will be presented. Keywords: super conducting, deflecting cavity, crab cavity.
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Design of end magnetic structures for the Advanced Light Source wigglers

Design of end magnetic structures for the Advanced Light Source wigglers

Date: April 1, 1995
Creator: Humphries, D.; Akre, J.; Hoyer, E.; Marks, S.; Minamihara, Y.; Pipersky, P. et al.
Description: The vertical magnetic structures for the Advanced Light planar wiggler and 20 cm period elliptical hybrid permanent magnet design. The ends of these structures are characterized by diminishing scalar potential distributions the poles which control beam trajectories. They incorporate electromagnetic correction coils to dynamically correct for variations in the first integral of the field as a function of gap. A permanent magnet trim mechanism is incorporated to minimize the transverse integrated error field distribution. The ends were designed using analytic and computer modeling techniques. The design and modeling results are presented.
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Design of equipment used for high-level waste vitrification at the West Valley Demonstration Project

Design of equipment used for high-level waste vitrification at the West Valley Demonstration Project

Date: June 1, 1997
Creator: Vance, R.F.; Brill, B.A. & Carl, D.E.
Description: The equipment as designed, started, and operated for high-level radioactive waste vitrification at the West Valley Demonstration Project in western New York State is described. Equipment for the processes of melter feed make-up, vitrification, canister handling, and off-gas treatment are included. For each item of equipment the functional requirements, process description, and hardware descriptions are presented.
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Design of Experiments Results for the Feedthru Insulator

Design of Experiments Results for the Feedthru Insulator

Date: December 1, 1999
Creator: BENAVIDES,GILBERT L.; VAN ORNUM,DAVID J.; BACA,MAUREEN R. & APPEL,PATRICIA E.
Description: A design of experiments (DoE) was performed at Ceramtec to improve the yield of a cermet part known as the feedthru insulator. The factors chosen to be varied in this DoE were syringe orifice size, fill condition, solvent, and surfactant. These factors were chosen because of their anticipated effect on the cermet slurry and its consequences to the feedthru insulator in succeeding fabrication operations. Response variables to the DoE were chosen to be indirect indicators of production yield for the feedthru insulator. The solvent amount used to mix the cermet slurry had the greatest overall effect on the response variables. Based upon this DoE, there is the potential to improve the yield not only for the feedthru insulator but for other cermet parts as well. This report thoroughly documents the DoE and contains additional information regarding the feedthru insulator.
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Design of Experiments to Estimate Temperature Dependent Thermal Properties

Design of Experiments to Estimate Temperature Dependent Thermal Properties

Date: July 22, 1999
Creator: Blackwell, B.F. & Dowding, K.J.
Description: Experimental conditions are studied to optimize transient experiments for estimating temperature dependent thermal conductivity and volumetric heat capacity. Thermal properties are assumed to vary linearly with temperature; a total of four parameters describe linearly varying thermal conductivity and volumetric heat capacity. A numerical model of experimental configurations is studied to determine the optimum conditions to conduct the experiment. The criterion D-optimality is used to study the sensor locations, heating duration and magnitude, and experiment duration for finite and semi-infinite configurations. Results indicate that D-optimality is an order of magnitude larger for the finite configuration and hence will provide estimates with a smaller confidence region.
Contributing Partner: UNT Libraries Government Documents Department
Design of fast tuning elements for the ITER ICH system

Design of fast tuning elements for the ITER ICH system

Date: May 1, 1996
Creator: Swain, D.W. & Goulding, R.H.
Description: The coupling between the ion cyclotron (IC) antenna and the ITER plasma (as expressed by the load resistance the antenna sees) will experience relatively fast variations due to plasma edge profile modifications. If uncompensated, these will cause an increase in the amount of power reflected back to the transmitter and ultimately a decrease in the amount of radio frequency (rf) power to the plasma caused by protective suppression of the amount of rf power generated by the transmitter. The goals of this task were to study several alternate designs for a tuning and matching (T&M) system and to recommend some research and development (R&D) tasks that could be carried out to test some of the most promising concepts. Analyses of five different T&M configurations are presented in this report. They each have different advantages and disadvantages, and the choice among them must be made depending on the requirements for the IC system. Several general conclusions emerge from our study: The use of a hybrid splitter as a passive reflected-power dump [``edge localized mode (ELM)-dump``] appears very promising; this configuration will protect the rf power sources from reflected power during changes in plasma loading due to plasma motion or profile changes ...
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Design of FastQuery: How to Generalize Indexing and Querying System for Scientific Data

Design of FastQuery: How to Generalize Indexing and Querying System for Scientific Data

Date: April 18, 2011
Creator: Wu, Jerry & Wu, Kesheng
Description: Modern scientific datasets present numerous data management and analysis challenges. State-of-the-art index and query technologies such as FastBit are critical for facilitating interactive exploration of large datasets. These technologies rely on adding auxiliary information to existing datasets to accelerate query processing. To use these indices, we need to match the relational data model used by the indexing systems with the array data model used by most scientific data, and to provide an efficient input and output layer for reading and writing the indices. In this work, we present a flexible design that can be easily applied to most scientific data formats. We demonstrate this flexibility by applying it to two of the most commonly used scientific data formats, HDF5 and NetCDF. We present two case studies using simulation data from the particle accelerator and climate simulation communities. To demonstrate the effectiveness of the new design, we also present a detailed performance study using both synthetic and real scientific workloads.
Contributing Partner: UNT Libraries Government Documents Department
The design of fins for air-cooled cylinders

The design of fins for air-cooled cylinders

Date: January 1, 1941
Creator: Biermann, Arnold E & Ellerbrock, Herman H , Jr
Description: An analysis was made to determine the proportions of fins made of aluminum, copper, magnesium, and steel necessary to dissipate maximum quantities of heat for different fin widths, fin weights, and air-flow conditions. The analysis also concerns the determination of the optimum fin proportions when specified limits are placed on the fin dimensions. The calculation of the heat flow in the fins is based on experimentally verified, theoretical equations. The surface heat-transfer coefficients used with this equation were taken from previously reported experiments. In addition to the presentation of fin-design information, this investigation shows that optimum fin dimensions are inappreciably affected by the differences in air flow that are obtained with different air-flow arrangements or by small changes in the length of the air-flow path.
Contributing Partner: UNT Libraries Government Documents Department
Design of Flexure-based Precision Transmission Mechanisms using Screw Theory

Design of Flexure-based Precision Transmission Mechanisms using Screw Theory

Date: February 7, 2011
Creator: Hopkins, J B & Panas, R M
Description: This paper enables the synthesis of flexure-based transmission mechanisms that possess multiple decoupled inputs and outputs of any type (e.g. rotations, translations, and/or screw motions), which are linked by designer-specified transmission ratios. A comprehensive library of geometric shapes is utilized from which every feasible concept that possesses the desired transmission characteristics may be rapidly conceptualized and compared before an optimal concept is selected. These geometric shapes represent the rigorous mathematics of screw theory and uniquely link a body's desired motions to the flexible constraints that enable those motions. This paper's impact is most significant to the design of nano-positioners, microscopy stages, optical mounts, and sensors. A flexure-based microscopy stage was designed, fabricated, and tested to demonstrate the utility of the theory.
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The design of floats

The design of floats

Date: April 1, 1938
Creator: Sottorf, W
Description: Following a summary of the multiplicity of domestic and foreign floats and a brief enumeration of the requirements of floats, the essential form parameters and their effect on the qualities of floats are detailed. On this basis a standard float design is developed which in model families with varying length/beam ratio and angle of dead rise is analyzed by an experimental method which permits its best utilization on any airplane.
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[Design of gas and electric rotary furnaces for the glass industry]. Quarterly progress report, September 20--December 20, 1997

[Design of gas and electric rotary furnaces for the glass industry]. Quarterly progress report, September 20--December 20, 1997

Date: December 31, 1997
Creator: Pochan, D.
Description: The authors have continually stressed that the two most critical material parameters for the success of the rotary furnace are the hearth plate and the molding release powder. Both of these issues have been solidly addressed in this quarter. They have tested the three best candidates for hearth plate material this quarter. Although they had to use the in-house gas furnaces for the testing, one of the materials combines the best heating efficiency with the least sticking tendency. This material will be used for the electric prototype. The molding release powder is mainly used for preventing the glass from adhering to the hearth plate while the glass is softening for pressing. They recently visited several companies in Japan who also repress glass. The release agent that they use is Boron Nitride. They have identified a supplier within New York state, but their concern is the very high price of this material. They are bringing in samples of different grades for experimentation, but the focus continues to be to eliminate the need for any powder. An additional area for material testing was addressed during this quarter. Once the glass is in the tool (mold) for pressing, the glass has the potential ...
Contributing Partner: UNT Libraries Government Documents Department
Design of Genomic Signatures of Pathogen Identification & Characterization

Design of Genomic Signatures of Pathogen Identification & Characterization

Date: February 9, 2010
Creator: Slezak, T.; Gardner, S.; Allen, J.; Vitalis, E. & Jaing, C.
Description: This chapter will address some of the many issues associated with the identification of signatures based on genomic DNA/RNA, which can be used to identify and characterize pathogens for biodefense and microbial forensic goals. For the purposes of this chapter, we define a signature as one or more strings of contiguous genomic DNA or RNA bases that are sufficient to identify a pathogenic target of interest at the desired resolution and which could be instantiated with particular detection chemistry on a particular platform. The target may be a whole organism, an individual functional mechanism (e.g., a toxin gene), or simply a nucleic acid indicative of the organism. The desired resolution will vary with each program's goals but could easily range from family to genus to species to strain to isolate. The resolution may not be taxonomically based but rather pan-mechanistic in nature: detecting virulence or antibiotic-resistance genes shared by multiple microbes. Entire industries exist around different detection chemistries and instrument platforms for identification of pathogens, and we will only briefly mention a few of the techniques that we have used at Lawrence Livermore National Laboratory (LLNL) to support our biosecurity-related work since 2000. Most nucleic acid based detection chemistries involve ...
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The Design of Halbach Arrays for Inductrack Maglev Systems

The Design of Halbach Arrays for Inductrack Maglev Systems

Date: August 28, 2008
Creator: Post, R F & Ngyuen, L
Description: Abstract not provided
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Design of Hanford Site 4th Generation Multi Function Corrosion Monitoring System

Design of Hanford Site 4th Generation Multi Function Corrosion Monitoring System

Date: August 30, 2000
Creator: NORMAN, E.C.
Description: This document describes the design of the fourth-generation corrosion monitoring system scheduled to be installed in DST 241-AN-104 early in fiscal year 2001. A fourth-generation multi-function corrosion monitoring system has been designed for installation into a DST in the 241-AN farm at the Hanford Site in FY 2001. Improvements and upgrades from the third-generation system (installed in 241-AN-105) that have been incorporated into the fourth-generation system include: Addition of a built-in water lance to assist installation of probe into tanks with a hard crust layer at the surface of the waste; and Improvement of the electrode mounting apparatus used to attach the corrosion monitoring electrodes to the stainless steel probe body (new design simplifies probe assembly/wiring). These new features improve on the third-generation design and yield a system that is easier to fabricate and install, provides for a better understanding of the relationship between corrosion and other tank operating parameters, and optimizes the use of the riser that houses the probe in the tank.
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