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Results of landing tests of various airplanes

Description: Report presenting a study of the landing characteristics of various airplanes with special attention paid to problems with landing gear design. The planes ranged from 1000 to 50,000 pounds and in span from 28 to 149 feet. Results regarding the observed landing conditions, including attitude, vertical velocity, pitching velocity, rolling velocity, lateral velocity (or side drift), and landing gear loads measured during the tests are provided.
Date: September 1942
Creator: Hootman, J. A. & Jones, A. R.
Item Type: Refine your search to only Report
open access

Geology and Oil Resources Along the Southern Border of San Joaquin Valley, California

Description: From abstract: The region described in this report includes a foothill belt of the San Emigdio and Tehachapi Mountains along the southern border of San Joaquin Valley. The belt displays portions of the rugged granitic cores of the mountains and also rocks of Eocene, Oligocene, Miocene, Pliocene, and Pleistocene age. Although there is thus a complete representation of the geologic series from the Eocene to the Pleistocene, some portions of the different series are wanting because of major faults… more
Date: 1930
Creator: Hoots, H. W.
Item Type: Refine your search to only Report
open access

Geology of the Eastern Part of the Santa Monica Mountains, Los Angeles County, California

Description: From abstract: The Santa Monica Mountains lie only a few miles northwest of the city of Los Angeles and comprise one of the prominent structural features that adjoin the Los Angeles Basin, one of the most prolific oil-producing districts of California. Even though the eastern part of these mountains may yield no oil, information concerning the rock types, structural character, and detailed geologic history of this area should be of value to petroleum geologists. The area described in this repor… more
Date: 1930
Creator: Hoots, H. W.
Item Type: Refine your search to only Report
open access

Neutron and gamma dose and spectra measurements on the Little Boy replica

Description: The radiation-measurement team of the Weapons Engineering Division at Lawrence Livermore National Laboratory (LLNL) measured neutron and gamma dose and spectra on the Little Boy replica at Los Alamos National Laboratory (LANL) in April 1983. This assembly is a replica of the gun-type atomic bomb exploded over Hiroshima in 1945. These measurements support the National Academy of Sciences Program to reassess the radiation doses due to atomic bomb explosions in Japan. Specifically, the following t… more
Date: June 1, 1984
Creator: Hoots, S. & Wadsworth, D.
Item Type: Refine your search to only Article
open access

1963 revisited: should we set a precedent of recalculating old exposures

Description: This paper describes recent experience in re-evaluating the dose to an employee. This employee was plagued with skin disorders for years, but he questioned his recorded beta dose only after a recent LLNL cancer study began collecting data. He was concerned that his radiation dose recorded during the time he worked on a fission burst reactor experiment in 1963 did not represent the actual dose he received. About six months were spent gathering information, putting the information together, makin… more
Date: October 26, 1981
Creator: Hoots, S.S.
Item Type: Refine your search to only Article
open access

Evaluation of field enforced antiferroelectric to ferroelectric phase transition dielectrics and relaxor ferroelectrics for pulse discharge capacitors

Description: Discharge capacitors were designed based on materials with antiferroelectric (AFE) to ferroelectric (FE) field enforced transitions that had 10 times the capacitance of relaxor ferroelectric or state of the art BaTiO{sub 3} materials in the voltage range of interest. Nonlinear RLC circuit analysis was used to show that the AFE to FE materials have potentially more than 2 times the peak discharge current density capability of the BaTiO{sub 3} or lead magnesium niobate (PMN) based relaxor materia… more
Date: September 1, 1997
Creator: Hoover, B. D.; Tuttle, B. A.; Olson, W. R.; Goy, D. M.; Brooks, R. A. & King, C. F.
Item Type: Refine your search to only Report
open access

Lac du Flambeau Band of Lake Superior Chippewa Indians Strategic Energy Plan

Description: This plan discusses the current energy use on the Lac du Flambeau Reservation, the current status of the Tribe's energy program, as well as the issues and concerns with energy on the reservation. This plan also identifies and outlines energy opportunities, goals, and objectives for the Tribe to accomplish. The overall goal of this plan is to address the energy situation of the reservation in a holistic manner for the maximum benefit to the Tribe. This plan is an evolving document that will be r… more
Date: November 16, 2009
Creator: Hoover, Bryan
Item Type: Refine your search to only Report
open access

Paradyn a parallel nonlinear, explicit, three-dimensional finite-element code for solid and structural mechanics user manual

Description: ParaDyn is a parallel version of the DYNA3D computer program, a three-dimensional explicit finite-element program for analyzing the dynamic response of solids and structures. The ParaDyn program has been used as a production tool for over three years for analyzing problems which range in size from a few tens of thousands of elements to between one-million and ten-million elements. ParaDyn runs on parallel computers provided by the Department of Energy Accelerated Strategic Computing Initiative … more
Date: June 1, 2000
Creator: Hoover, C G; DeGroot, A J & Sherwood, R J
Item Type: Refine your search to only Report
open access

Future algorithm research needs for partitioning in solid mechanics and coupled mechanical models

Description: Exceptional progress has been made in mathematical algorithm research leading to optimized mesh partitions for the highly unstructured grids occurring in finite element applications in solid mechanics. Today another research challenge presents itself. Research is needed to include boundary conditions into the algorithms for partitioning meshes. We describe below two methods we use currently to accomplish this and propose a more general approach be developed which would apply to our problems tod… more
Date: October 6, 1997
Creator: Hoover, C. G.; DeGroot, A. J. & Sherwood, R. J.
Item Type: Refine your search to only Article
open access

Evaluation of intrusion sensors and video assessment in areas of restricted passage

Description: This report discusses an evaluation of intrusion sensors and video assessment in areas of restricted passage. The discussion focuses on applications of sensors and video assessment in suspended ceilings and air ducts. It also includes current and proposed requirements for intrusion detection and assessment. Detection and nuisance alarm characteristics of selected sensors as well as assessment capabilities of low-cost board cameras were included in the evaluation.
Date: April 1, 1996
Creator: Hoover, Chris E. & Ringler, Charles E.
Item Type: Refine your search to only Report
open access

Cell and stack design alternatives. Second quarterly report, November 1, 1978-January 31, 1979

Description: Work on the design of an on-site fuel cell total energy system for an apartment building is described. A mass and energy balance was completed for one operating point of a selected power generation sub-system with a power output of 119 kW. Potentially, 87 percent of the LHV of the input fuel is available as bus bar electricity or useful heat. A 2 kW stack of conventional design and a 0.5 kW DIGAS cooled stack have been constructed and are on test at ERC. Renovation of a space for the Westinghou… more
Date: February 14, 1979
Creator: Hoover, D. Q.
Item Type: Refine your search to only Report
open access

Development and evaluation of an automated reflectance microscope system for the petrographic characterization of bituminous coals

Description: The development of automated coal petrographic techniques will lessen the demands on skilled personnel to do routine work. This project is concerned with the development and successful testing of an instrument which will meet these needs. The fundamental differences in reflectance of the three primary maceral groups should enable their differentiation in an automated-reflectance frequency histogram (reflectogram). Consequently, reflected light photometry was chosen as the method for automating … more
Date: October 1, 1980
Creator: Hoover, D. S. & Davis, A.
Item Type: Refine your search to only Report
open access

Cell and stack design alternatives. First quarterly report, August 1, 1978-October 31, 1978

Description: An apartment house in Albany, New York with HUD minimum insulation was selected as the application to be used in evaluating various system configurations of on-site fuel cell total energy systems. Methods for calculating the static and dynamic thermal loads for a simulated season were developed. Computer models of some major subsystems are now being developed. Finite element models of the electrochemistry, thermodynamics and heat transfer relationships for fuel cells were developed and have bee… more
Date: January 1, 1979
Creator: Hoover, D.Q.
Item Type: Refine your search to only Report
open access

Preliminary Analysis of Two Aspects of Magma-Powered Electric-Generation Plants

Description: Two aspects critical to the development of magma electric generation plants using closed heat exchanger systems are addressed. The heat transfer between the cold fluid in the downcomer and the hot fluid in the upcomer is analyzed using an NTU-effectiveness technique. The results indicate the hot fluid must be thermally insulated from the colder fluid in order to yield a useful temperature difference at the surface. A preliminary system analysis is conducted to determine the well cost requiremen… more
Date: September 1980
Creator: Hoover, E. R.
Item Type: Refine your search to only Report
open access

Failure mechanisms of polycrystalline diamond compact drill bits in geothermal environments

Description: Over the past few years the interest in polycrystalline diamond compact (PDC) drill bits has grown proportionately with their successful use in drilling oil and gas wells in the North Sea and the United States. This keen interest led to a research program at Sandia to develop PDC drill bits suitable for the severe drilling conditions encountered in geothermal fields. Recently, three different PDC drill bits were tested using either air or mud drilling fluids: one in the laboratory with hot air,… more
Date: September 1, 1981
Creator: Hoover, E. R. & Pope, L. E.
Item Type: Refine your search to only Report
open access

Comparative analysis of combined flat-plate PV/T collectors with separate photovoltaic and thermal collectors

Description: The conditions under which a combined photovoltaic/thermal (PV/T) collector is more cost effective than separate flat-plate photovoltaic and thermal collectors are determined. The annual performance of the separate PV/T system and four different combined PV/T systems are simulated. Based on the equivalent electrical and thermal outputs and the 1986 DOE cost goal for PV modules (70 cents/Wp), the maximum allowable incremental cost to upgrade the conventional thermal collector to a combined PV/T … more
Date: January 1, 1981
Creator: Hoover, E.R.
Item Type: Refine your search to only Article
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