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ZioLib: A parallel I/O library

Description: In a distributed memory parallel environment, many applications rely on a serial I/O strategy, where the global array is gathered on a single MPI process and then written out to a file. I/O performance with this approach is largely limited by single process I/O bandwidth. Even when parallel I/O is used, satisfactory parallel scaling is not always observed. It is because in many applications fields are not necessarily in a most favorable parallel decomposition for I/O. The best I/O rates are obt… more
Date: August 1, 2003
Creator: Yang, Woo-Sun & Ding, Chris
Item Type: Refine your search to only Report
open access

Ziptrack integrator

Description: This technical memo is a brief owner's manual describing the operation and design of the ziptrack integrator. This electronic circuit is part of a magnetic field mapping devices in use on the Tevatron I at Fermilab. 7 figs., 15 tabs. (DWL)
Date: August 15, 1986
Creator: Prabhakar, Ernest N.
Item Type: Refine your search to only Report
open access

Zircaloy-2 process tube activity, C Reactor

Description: This report presents the dose rates which were observed during the removal of a Zircaloy-2 process tube from C Reactor. The corresponding calculated activity is also presented for the purpose of correlation with the observed dose rate. The tube was removed on July 22, 1964, after having been irradiated by a neutron flux for 560 days (based on time operated efficiency). The tube activity was monitored with a super high range TP (0-5000 R/hr) by suspending a probe through an access port in the fl… more
Date: August 26, 1964
Creator: Essig, T. H.
Item Type: Refine your search to only Report
open access

Zircaloy fuel cladding collapse test plan

Description: This test plan outlines the experimental philosophy and procedures for investigating the deformation behavior of Zircaloy fuel cladding under normal and near-normal reactor operating conditions. Such conditions impose compressive hoop and axial stresses on the cladding at temperatures that encompass the time-dependent or creep-strain regime. The purpose of the outlined study is to understand the deformation behavior of cladding under in- and out-of-reactor conditions so that mechanical properti… more
Date: August 1, 1976
Creator: Hobson, D. O.
Item Type: Refine your search to only Report
open access

Zirconium and Niobium Transmission Data at Wavelengths from 11-16 nm and 200-1200 nm

Description: Transmission measurements of niobium and zirconium at both extreme-ultraviolet (EUV) and ultraviolet, visible, and near infrared (UV/Vis/NIR) wavelengths are presented. Thin foils of various thicknesses mounted on nickel mesh substrates were measured, and these data were used to calculate the optical constants {delta} and {beta} of the complex refractive index n = 1- {delta} +i{beta}. {beta} values were calculated directly from the measured transmittance of the foils after normalizing for the n… more
Date: August 30, 2004
Creator: Johnson, T; Soufli, R; Gulikson, E & Clift, M
Item Type: Refine your search to only Article
open access

Zirconium Hazards Research. Summary Report No. 3655 for September 1, 1956 to August 31, 1957

Description: The sensitivity characteristics of a variety of Zr samples such as sponge, scrap, powder and process materials were studicd. Of particular interest was the determination of the relative seasitivity of these materials to such stimuli as impact, friction, electrostatic discharge, and heat. A study of the zirconium--water reaction at relatively low temperature was initiated. In general, scrap and sponge were relatively insensitive to impact. Only one proeess material, the distillation residue, exh… more
Date: August 31, 1957
Creator: Herickes, J.A.; Richardson, P.A.; Weiss, M. & Gelernter, G.
Item Type: Refine your search to only Report
open access

Zirconium Highlights

Description: The effect of hot-worked thickness on the corrosion behavior of atmosphere-melted Zircaloy-2 is discussed. Hydrogen pickup upon etching Zircaloy- 2 Zircaloy-3, and properties of vacuum-cast Zircaloy-2 and the fabrication of special Zirccaloy shapes are presented. A hardness converison chart for annealed zirconium and zirconium alloys is included. (J.E.D.) The useful properties of the tungsten wires used in the incandescent lamp and ra dio tubes industry are ensured by adding about 1% of various… more
Date: August 1, 1958
Item Type: Refine your search to only Report
open access

Zone Refining of Plutonium Metal

Description: The zone refining process was applied to Pu metal containing known amounts of impurities. Rod specimens of plutonium metal were melted into and contained in tantalum boats, each of which was passed horizontally through a three-turn, high-frequency coil in such a manner as to cause a narrow molten zone to pass through the Pu metal rod 10 times. The impurity elements Co, Cr, Fe, Ni, Np, U were found to move in the same direction as the molten zone as predicted by binary phase diagrams. The elemen… more
Date: August 1, 1994
Creator: Blau, M. S.
Item Type: Refine your search to only Thesis or Dissertation
open access

Zoning for Distributed Wind Power - Breaking Down Barriers: Preprint

Description: Zoning regulations for the use of small wind turbines vary from state to state and from one local jurisdiction to the next. This paper examines the zoning experiences of small wind turbine owners, options for local actions, and examples of state and federal limited preemption of local zoning authority as a means of promoting the implementation of new technologies.
Date: August 1, 2005
Creator: Green, J. & Sagrillo, M.
Item Type: Refine your search to only Article
open access

Zooplankton data: Vertical distributions of zooplankton in the Norweigian and Greenland Seas during summer, 1989

Description: Recent studies of zooplankton populations in the Greenland Sea have focused on processes at the Marginal Ice Zone (MIZ) and the areas immediately adjacent to it under the ice and in open water. These studies have shown a relatively short period of intense secondary productivity which is closely linked temporally and spatially to phytoplankton blooms occurring near the ice edge in spring and early summer. During the summer of 1989 we participated in a project focusing on benthic and water column… more
Date: August 1, 1993
Creator: Lane, P. V. Z.; Smith, S. L. & Schwarting, E. M.
Item Type: Refine your search to only Report
open access

ZT-40 administrative plan

Description: An administrative plan for the ZT-40 project has been developed. It describes baselines and procedures that will be used for the remainder of the construction phase of the project.
Date: August 1, 1978
Creator: Thomas, K.S. (comp.)
Item Type: Refine your search to only Report
open access

ZX Pulsed-Power Design

Description: ZX is a new z-pinch accelerator planned as the next generation z-pinch driver at SNL, and as an intermediate step towards X-1. It is planned to drive either a single 50 MA z-pinch load, or two 25 to 30 MA z pinches. Three designs for the ZX accelerator are presented. All require 7 to 8 MV at the insulator stack to drive the z-pinch load to implosion in 100 to 120 ns. Two of the designs are based on the Z accelerator, and use water-line technology; a transit-time-isolated water adder, and a wate… more
Date: August 2, 1999
Creator: Corley, J. P.; Johnson, D. L.; McDaniel, D. H.; Spielman, R. B.; Struve, K. W. & Stygar, W. A.
Item Type: Refine your search to only Article
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