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in creator/contributor: "Baker, J. E."

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Anisotropy of oxygen tracer diffusion in YBa sub 2 Cu sub 3 O sub 7-. delta. single crystals

The crystal structure of YBa{sub 2}Cu{sub 3}O{sub 7-{delta}} strongly suggests that the diffusion of oxygen in this material will be highly anisotropic, with diffusion in the ab plane being much faster than diffusion parallel to the c axis, and this has been assumed in most analyses of diffusion in YBa{sub 2}Cu{sub 3}O{sub 7-{delta}}. The present data confirm this hypothesis; the diffusion coefficient in the ab plane is several orders of magnitude greater than the diffusion coefficient along th… more

Date: September 1, 1989

Creator: Rothman, S. J.; Routbort, J. L.; Liu, J.-Z.; Downey, J. W.; Thompson, L. J.; Fang, Y. et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Land use and energy

This report provides estimates of the amount of land required by past and future energy development in the United States and examines major federal legislation that regulates the impact of energy facilities on land use. An example of one land use issue associated with energy development - the potential conflict between surface mining and agriculture - is illustrated by describing the actual and projected changes in land use caused by coal mining in western Indiana. Energy activities addressed i… more

Date: July 1, 1980

Creator: Robeck, K. E.; Ballou, S. W.; South, D. W.; Davis, M. J.; Chiu, S. Y.; Baker, J. E. et al.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Adaptive learning of Multi-Sensor Integration techniques with genetic algorithms

This research focuses on automating the time-consuming process of developing and optimizing multi-sensor integration techniques. Our approach is currently based on adaptively learning how to exploit low-level image detail. Although this system is specifically designed to be both sensor and application domain independent, an empirical validation with actual multi-modal sensor data is presented.

Date: June 1, 1994

Creator: Baker, J. E.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Automatic calibration of laser range cameras using arbitrary planar surfaces

Laser Range Cameras (LRCs) are powerful tools for many robotic/computer perception activities. They can provide accurate range images and perfectly registered reflectance images of the target scene, useful for constructing reliably detailed 3-D world maps and target characterizations. An LRC`s output is an array of distances obtained by scanning a laser over the scene. To accurately interpret this data, the angular definition of each pixel, i.e., the 3-D direction corresponding to each distance… more

Date: June 1, 1994

Creator: Baker, J. E.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Image accuracy and representational enhancement through low-level, multi-sensor integration techniques

Multi-Sensor Integration (MSI) is the combining of data and information from more than one source in order to generate a more reliable and consistent representation of the environment. The need for MSI derives largely from basic ambiguities inherent in our current sensor imaging technologies. These ambiguities exist as long as the mapping from reality to image is not 1-to-1. That is, if different 44 realities'' lead to identical images, a single image cannot reveal the particular reality which … more

Date: May 1, 1993

Creator: Baker, J. E.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Image accuracy and representational enhancement through low-level, multi-sensor integration techniques

Multi-Sensor Integration (MSI) is the combining of data and information from more than one source in order to generate a more reliable and consistent representation of the environment. The need for MSI derives largely from basic ambiguities inherent in our current sensor imaging technologies. These ambiguities exist as long as the mapping from reality to image is not 1-to-1. That is, if different 44 realities`` lead to identical images, a single image cannot reveal the particular reality which … more

Date: May 1993

Creator: Baker, J. E.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Experimental investigations of sensor-based surface following performed by a mobile manipulator

We discuss a series of surface following experiments using a range finder mounted on the end of an arm that is mounted on a vehicle. The goal is to keep the range finder at a fixed distance from an unknown surface and to keep the orientation of the range finder perpendicular to the surface. During the experiments, the vehicle moves along a predefined trajectory while planning software determines the position and orientation of the arm. To keep the range finder perpendicular to the surface, the … more

Date: October 1994

Creator: Reister, D. B.; Unseren, M. A.; Baker, J. E. & Pin, F. G.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Image accuracy and representational enhancement through low-level, multi-sensor integration techniques

Multi-Sensor Integration (MSI) is the combining of data and information from more than one source in order to generate a more reliable and consistent representation of the environment. The need for MSI derives largely from basic ambiguities inherent in our current sensor imaging technologies. These ambiguities exist as long as the mapping from reality to image is not 1-to-1. That is, if different {open_quotes}realities{close_quotes} lead to identical images, a single image cannot reveal the par… more

Date: September 1, 1994

Creator: Baker, J. E.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Experimental investigations of sensor-based surface following tasks by a mobile manipulator

This paper discusses experimental investigations of the feasibility and requirements of simultaneous external-sensor-based-control of the wheeled platform and the manipulator of a mobile robot. The experiments involve 3-D arbitrary surface following by the manipulator while the platform moves along a predefined trajectory. A variety of concave and convex surfaces were used in the experiments, during which target and measured values of the platform and arm positions and orientations, together wi… more

Date: October 1, 1993

Creator: Reister, D. B.; Unseren, M. A.; Baker, J. E. & Pin, F. G.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

HRP Radiation Corrosion Studies

A fifth in-pile loop experiment, L-4-8, was completed. The loop operated in-pile for a total of 1637 hr, during which time the LITR energy output was 4377 Mwhr. The average fission power in the loop based o cesium analyses was 622 w when the LITR was at full power (3 Mw). Based on oxygen data, the generalized corrosion rate for the first 300 hr was 4.0 mpy; the rate for the remaining 1357 hr was 0.7 mpy. The nickel data gave parallel results. The corrosion of the type 347 stainless steel, Zirca… more

Date: August 21, 1956

Creator: Baker, J. E.; Bradley, N. C.; Jenks, G. H.; Olsen, A. R.; Savage, H. C. & Walter, F. J.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Determination of the Effect of High Excess H2SO4 Concentrations on the Radiation-Induced Corrosion of Zirconium and Titanium Alloys in 0.17 m UO2SO4

Study of the effects on Zircaloy-2 radiation corrosion of a high concentration of excess H2SO4 in a uranyl sulfate test solution using an in-pile loop experiment.

Date: May 1, 1962

Creator: Jenks, G. H.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

In-Pile Loop Investigations of Corrosion of Zircaloy-2 and Other Possible Reactor Materials in 0.04 m UO2SO4 AT 280°C

One of a series of experiments to test the radiation corrosion of Zircaloy-2 and other possible reactor construction materials in UO2SO4 solutions under various radiation intensities, temperatures, solution compositions, and velocities of flow past specimens.

Date: May 5, 1962

Creator: Jenks, G. H.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

In-Pile Radiation Corrosion Experiments with Zirconium, Titanium, and Steel Alloys in 0.17 m UO2SO4 Solutions at 280°C

In-pile loop experiments L-2-15 and L-4-16 were two of a series designed to test the radiation corrosion of Zircaloy-2 and other possible reactor construction materials in UO2SO4 solutions under various conditions of radiation intensities, temperatures, solution compositions, and velocity flow past specimens.

Date: June 10, 1963

Creator: Jenks, G. H.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

In-Pile Loop Corrosion Experiments with Uranyl Sulfate Solutions at 235 and 250 C

Report presenting in-pile loop experiments DD, EE, FF, GG, L-412, L-413, and L-418, which were seven of a series designed to test the radiation corrosion of zirconium, titanium, and stainless steel alloys in solutions under various conditions of radiation intensity, temperature, solution composition, and velocity of flow. Steel specimens exposed in the loop cores showed increases in corrosive attack over that expected out-of-radiation.

Date: August 15, 1963

Creator: Jenks, G. H. & Baker, J. E.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

HRP Radiation Corrosion Studies: In-Pile Loop L-4-11

Report issued by the Oak Ridge National Laboratory discussing radiation corrosion studies. As stated in the introduction, "the purpose of this experiment was to compare the performance of a large number of materials under similar irradiation and exposure conditions" (p. 1). This report includes tables, illustrations, and photographs.

Date: June 27, 1958

Creator: McWherter, J. R. & Baker, J. E.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Adaptive multi-sensor integration for mine detection

State-of-the-art in multi-sensor integration (MSI) application involves extensive research and development time to understand and characterize the application domain; to determine and define the appropriate sensor suite; to analyze, characterize, and calibrate the individual sensor systems; to recognize and accommodate the various sensor interactions; and to develop and optimize robust merging code. Much of this process can benefit from adaptive learning, i.e., an output-based system can take r… more

Date: May 1997

Creator: Baker, J. E.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Terrain following of arbitrary surfaces using a high intensity LED proximity sensor

Many robotic operations, e.g., mapping, scanning, feature following, etc., require accurate surface following of arbitrary targets. This paper presents a versatile surface following and mapping system designed to promote hardware, software and application independence, modular development, and upward expandability. These goals are met by: a full, a priori specification of the hardware and software interfaces; a modular system architecture; and a hierarchical surface-data analysis method, permit… more

Date: January 1992

Creator: Baker, J. E.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Thermal-Neutron Flux at the HRE-2 Core Wall, Determined from Zircaloy-2 Induced-Activity Measurements During Runs 13, 14, 16, 17, 18, 19, 20 and 21.

The thermal-neutron flux prevailing near the upper hole in the HRE-2 core wall was determined from measurements of the induced activity in a specimen cut from the edge of the hole. The specimen was removed following run 21 and was thus exposed to reactor neutrons during runs 13, 14, 16,17, 18. 19, 20, and 21. The neutron flux, calculated for an average core power level of 2 Mw, was 2.8 x10^13 neutrons/cm^2 sec. the core wall area from which the specimen was removed was located approximately 16-… more

Date: December 20, 1960

Creator: Baker, J. E.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

HRT Corrosion Samples -- Additional Data on Specimens Removed Prior to Run No. 20.

Results of the examinations of corrosion specimens exposed in the HRT are presented. Specimens examined included (1) core screen samples, (2) core specimen array No. 1, (3) blanket specimen array No. 2, (4) core solution line specimen arrays No. 103 and 103A, (5) blanket solution line specimen array No. 203. Complete information is still not available on all the specimens removed from the reactor, however, those data which have been accumulated are presented. These include corrosion rates, com… more

Date: February 2, 1961

Creator: Baker, J. E.; Silverman, M. D.; Jenks, G. H. & Olsen, A. R.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Thermal Neutron Fluxes in HRE-2 Determined From Zircaloy-2 Induced ActivityMeasurements, Runs 16 and 17

Thermal neutron fluxes prevailing near some Zircaloy-2 specimens exposed during HRT run 17, and near others exposed during runs 17, 16, 14 and 13 have been determined from measurements of the induced activity in the specimens. The neutron fluxes were calculated for an average core power level of 2 Mv.

Date: December 18, 1959

Creator: Baker, J. E.; Jenks, G. H. (Glenn Herbert), 1916- & Olsen, A. R.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Apparent Copper Rate Constants Determined In In-Pile Loop Experiment L-2-22

The results of radiolytic gas pressure measurements in the pressurizer of in-pile loop experiment L-2-22 were used to calculate the copper rate constants in the several different test solutions. Values for the copper concentration obtained from solution analyses were combined with the solution rate constants to determine the apparent molar rate constant for each solution at 280'C.

Date: March 23, 1960

Creator: Jenks, G. H. (Glenn Herbert), 1916- & Baker, J. E.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

A Pilot Plant for the Reduction of Uranium Hexafluoride to Uranium Tetrafluoride with Trichloroethylene

Pilot plant experiments are described in which trichloroethylene was used for the reduction of uranium hexafluoride to uranium tetrafluoride. After unsatisfactory preliminary results with liquid phase reduction, satisfactory results were obtained with a vapor phase reduction system. It was found that vapor phase reduction at approximately 450 deg F, produced a low density product which contained only small quantities of uranium(VI); sintering the uranium tetrafluoride in a hydrogen fluoride atm… more

Date: May 31, 1956

Creator: Baker, J. E.; Klaus, H. V.; Schmidt, R. A. & Smiley, S. H.

Item Type: Report

Partner: UNT Libraries Government Documents Department