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5,238 Matching Results
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Activation of cobalt by neutrons from the Hiroshima bomb
A study has been completed of cobalt activation in samples from two new locations in Hiroshima. The samples consisted of a piece of steel from a bridge located at a distance of about 1300 m from the hypocenter and pieces of both steel and concrete from a building located at approximately 700 m. The concrete was analyzed to obtain information needed to calculate the cobalt activation in the two steel samples. Close agreement was found between calculated and measured values for cobalt activation of the steel sample from the building at 700 m. It was found, however, that the measured values for the bridge sample at 1300 m were approximately twice the calculated values. Thus, the new results confirm the existence of a systematic error in the transport calculations for neutrons from the Hiroshima bomb. 52 refs., 32 figs., 16 tabs.
Date:
February 1, 1990
Creator:
Kerr, G. D.; Dyer, F. F.; Emery, J. F.; Pace, J. V. III; Brodzinski, R. L. & Marcum, J.
Object Type:
Report
System:
The UNT Digital Library
The Albany News (Albany, Tex.), Vol. 114, No. 34, Ed. 1 Thursday, February 1, 1990
Weekly newspaper from Albany, Texas that includes local, county, and state news along with extensive advertising.
Date:
February 1, 1990
Creator:
Lucas, Donnie A.
Object Type:
Newspaper
System:
The Portal to Texas History
Altus Times (Altus, Okla.), Vol. 68, No. 28, Ed. 1 Thursday, February 1, 1990
Daily newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.
Date:
February 1, 1990
Creator:
Lomenick, Rick
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Application of neural nets to system identification and bifurcation analysis of real world experimental data
We report results on the use of neural nets, and the closely related radial basis nets'', to analyze experimental time series from electro-chemical systems. We show how the nets may be used to derive a map that describes the nonlinear system, and how reserving an extra input line'' of the network allows one to learn the system behavior dependent on a control variable. Pruning'' of the network after training appears to result in elimination of spurious connection weights and enhanced predictive accuracy. Subsequent analysis of the learned map using techniques of bifurcation theory allows both nonlinear system identification and accurate and efficient predictions of long-term system behavior. The electrochemical system that was used involved the electrodissolution of copper in phosphoric acid. This system exhibits interesting low dimensional dynamics such transitions from steady state to oscillatory behavior and from period-one to period-two oscillations. This analysis provides an example of methodology that can be fruitful in understanding systems for which no adequate phenomenological model exists, or for which predictions of system behavior given a large scale, complicated model is inherently impractical. 17 refs., 2 figs.
Date:
February 1, 1990
Creator:
Adomaitis, R.A.; Kevrekidis, I.G. (Princeton Univ., NJ (USA). Dept. of Chemical Engineering); Farber, R.M.; Lapedes, A.S. (Los Alamos National Lab., NM (USA)); Hudson, J.L. & Kube, M. (Virginia Univ., Charlottesville, VA (USA). Dept. of Chemical Engineering)
Object Type:
Article
System:
The UNT Digital Library
Archer County News (Archer City, Tex.), No. 5, Ed. 1 Thursday, February 1, 1990
Weekly newspaper from Archer City, Texas that includes local, state, and national news along with advertising.
Date:
February 1, 1990
Creator:
Lobpries, F. Mike & Lobpries, Fran
Object Type:
Newspaper
System:
The Portal to Texas History
Argon Test Cell (ATC) Cryostat Engineering Note
None
Date:
February 1, 1990
Creator:
Dixon, K.
Object Type:
Report
System:
The UNT Digital Library
An Assessment of Freeze Brand and PIT Tag Recovery Data for Juvenile Salmonids at McNary Dam, 1988 Annual Report.
This study evaluated mark recovery data from PIT-tagged and freeze-branded river-run yearling and subyearling chinook salmon (Oncorhynchus tshawytscha), sockeye salmon (Q. nerka), and steelhead (0. mykiss) at McNary Dam in 1988. Double-marked (PIT-tagged and freeze-branded) juvenile salmonids were released within the McNary Dam collection system upstream from the PIT-tag detectors and brand sampling system. Results indicate that brands were recovered in smaller proportions than PIT tags and the variability of brand data was considerable. Most of the error associated with brands was attributable to human error inherent in brand detection and interpretation.
Date:
February 1, 1990
Creator:
McCutcheon, Clinton Scott
Object Type:
Report
System:
The UNT Digital Library
The Bastrop Advertiser (Bastrop, Tex.), Vol. 136, No. 95, Ed. 1 Thursday, February 1, 1990
Semi-weekly newspaper from Bastrop, Texas that includes local, state, and national news along with extensive advertising.
Date:
February 1, 1990
Creator:
McAuley, Davis
Object Type:
Newspaper
System:
The Portal to Texas History
The Baytown Sun (Baytown, Tex.), Vol. 68, No. 80, Ed. 1 Thursday, February 1, 1990
Daily newspaper from Baytown, Texas that includes local, state, and national news along with advertising.
Date:
February 1, 1990
Creator:
Brown, Leon
Object Type:
Newspaper
System:
The Portal to Texas History
The Big Lake Wildcat (Big Lake, Tex.), Vol. SIXTY-FIFTH YEAR, No. 5, Ed. 1 Thursday, February 1, 1990
Weekly newspaper from Big Lake, Texas that includes local, state and national news along with advertising.
Date:
February 1, 1990
Creator:
Werst, David
Object Type:
Newspaper
System:
The Portal to Texas History
Biological Manipulation of Migration Rate: The Use of Advanced Photoperiod to Accelerate Smoltification in Yearling Chinook Salmon, Annual Report 1988.
Research was conducted to assess the feasibility of biologically manipulating physiological development and migratory behavior of yearling spring chinook salmon, Oncorhynchus tshawytscha. At Dworshak National Fish Hatchery a treatment group was exposed to a 3-month advanced photoperiod cycle for 14 weeks preceding release. Physiological development and migratory performance of this group was compared to a control group. Changes in physiological indices indicated that exposing fish to an advanced photoperiod treatment increased the rate of smolt development. Photoperiod treatment also altered passage patterns and timing at Lower Granite Dam. 26 refs., 6 figs., 7 tabs.
Date:
February 1, 1990
Creator:
Giorgi, Albert E.; Muir, William D. & Zaugg, Waldo S.
Object Type:
Report
System:
The UNT Digital Library
Bogata News (Bogata, Tex.), Vol. 79, No. 17, Ed. 1 Thursday, February 1, 1990
Weekly newspaper from Bogata, Texas that includes local, state, and national news along with advertising.
Date:
February 1, 1990
Creator:
Nichols, Nanalee & Nichols, Thomas
Object Type:
Newspaper
System:
The Portal to Texas History
The Bosque County Record Tribune (Clifton, Tex.), Vol. 95, No. 5, Ed. 1 Thursday, February 1, 1990
Weekly newspaper from Clifton, Texas that includes local, state, and national news along with advertising.
Date:
February 1, 1990
Creator:
Smith, W. Leon
Object Type:
Newspaper
System:
The Portal to Texas History
Bunch lengthening in the SLC (Stanford Linear Collider) damping rings
A high level of current dependent bunch lengthening has been observed on the North damping ring of the Stanford Linear Collider (SLC). At currents of 3 {times} 10{sup 10} this behavior does not appear to degrade the machine's performance significantly. However, at the higher currents that are envisioned for the future one fears that its performance could be greatly degraded due to the phenomenon of bunch lengthening. This was the motivation for the work described in this paper. In this paper we calculate the longitudinal impedance of the damping ring vacuum chamber. More specifically, in this paper we find the response function of the ring to a short Gaussian bunch, which we call the Green function wake. In addition, we try to estimate the relative importance of the different vacuum chamber objects, in order to see how we might reduce the ring impedance. This paper also describes bunch length measurements performed on the North damping ring. We use the Green function wake, discussed above, to compute the bunch lengthening. Then we compare these results with those obtained from the measurements. In addition, we calculate the current dependence of the tune distribution.
Date:
February 1, 1990
Creator:
Bane, Karl L. F.
Object Type:
Article
System:
The UNT Digital Library
The Canadian Record (Canadian, Tex.), Vol. 100, No. 5, Ed. 1 Thursday, February 1, 1990
Weekly newspaper from Canadian, Texas that includes local, state and national news along with extensive advertising.
Date:
February 1, 1990
Creator:
Ezzell, Ben & Ezzell, Nancy
Object Type:
Newspaper
System:
The Portal to Texas History
Castroville News Bulletin (Castroville, Tex.), Vol. 31, No. 5, Ed. 1 Thursday, February 1, 1990
Weekly newspaper from Castroville, Texas that includes local, state, and national news along with extensive advertising.
Date:
February 1, 1990
Creator:
Buckner, Luana
Object Type:
Newspaper
System:
The Portal to Texas History
Causes of failing the draft ANSI Standard N13. 30 radiobioassay performance criterion for minimum detectable amount
The test methods used for PNL bioassay performance tests were evaluated by comparing the MDA based on performance tests results with MDA calculated by PNL using the bioassay laboratory's own quality control (QC) data. Two in vitro laboratories and two in vivo laboratories were studied and a correlation between the performance test MDA estimates and QC data was demonstrated. However, it was often necessary to examine the QC data to identify important characteristics of the blank distribution that affect the MDA calculation. Since the MDA equation must be based on the specific analysis and calculational methods of the procedure evaluated. Even when the correct MDA equation is applied, the MDA calculated will have a relatively large confidence interval when only a few replicates are used to estimate the standard deviation. For this reason, a relatively precise estimate of the MDA is generally only available when Poisson statistics may be applied. It was concluded that performance testing alone cannot provide all the information necessary to make an accurate estimate of the measurement process MDA. Review of the laboratory's QC data and the entire measurement procedure will be necessary. Specific recommendations for changes to draft ANSI N13.30 Performance Criteria for Radiobioassay'' are …
Date:
February 1, 1990
Creator:
MacLellan, J.A.
Object Type:
Report
System:
The UNT Digital Library
Characterization of Plasma Flow Through Magnetic Nozzles
None
Date:
February 1, 1990
Creator:
Gerwin, R. A.; Marklin, G. J.; Sgro, A. G. & Glasser, A. H.
Object Type:
Report
System:
The UNT Digital Library
Cherokeean/Herald (Rusk, Tex.), Vol. 141, No. 52, Ed. 1 Thursday, February 1, 1990
Weekly newspaper from Rusk, Texas that includes local, state and national news along with extensive advertising.
Date:
February 1, 1990
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
Chickasha Daily Express (Chickasha, Okla.), Vol. 98, No. 277, Ed. 1 Thursday, February 1, 1990
Daily newspaper from Chickasha, Oklahoma that includes local, state, and national news along with advertising.
Date:
February 1, 1990
Creator:
Drew, Charles C.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Chickasha Star (Chickasha, Okla.), Vol. 88, No. 47, Ed. 1 Thursday, February 1, 1990
Weekly newspaper from Chickasha, Oklahoma that includes local, state, and national news along with advertising.
Date:
February 1, 1990
Creator:
unknown
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Cle Elum Lake Sockeye Salmon Restoration Feasibility Study, 1987-1989 Progress Report.
This report summarizes research activities conducted by the National Marine Fisheries Service (NMFS) from July 1988 through March 1989 relating to the Cle Elum Lake sockeye salmon restoration feasibility study. During this period, efforts focused on collection and spawning of adult sockeye salmon from the Wenatchee River, incubation of eggs from the 1988-brood, and the rearing of juveniles from the 1987-brood. In late July and early August 1988, 520 adult sockeye salmon were captured at fishways on the Wenatchee River and transferred to net-pens in Lake Wenatchee. Fish were held to maturity in late September and early October, spawned, and eggs incubated at a quarantine hatchery in Seattle, WA. The 336 sockeye salmon successfully spawned from the net-pens at Lake Wenatchee were surveyed for the presence of infectious hematopoietic necrosis (IHN) and other replicating viruses. In addition, 13 and 5 sockeye salmon spawners were surveyed from spawning grounds on the White and Little Wenatchee Rivers, respectively, from within the Lake Wenatchee system. 12 refs., 4 figs., 6 tabs.
Date:
February 1, 1990
Creator:
Flagg, Thomas A.
Object Type:
Report
System:
The UNT Digital Library
A comparison of two- and three-dimensional S809 airfoil properties for rough and smooth HAWT (horizontal-axis wind turbine) rotor operation
At the Solar Energy Research Institute (SERI), we carried out tests to measure the effects of leading-edge roughness on an S809 airfoil using a 10-m, three-bladed, horizontal-axis wind turbine (HAWT). The rotor employed a constant-chord (.457 m) blade geometry with zero twist. Blade structural loads were measured with strain gages mounted at 9 spanwise locations. Airfoil pressure measurements were taken at the 80% spanwise station using 32 pressure taps distributed around the airfoil surface. Detailed inflow measurements were taken using nine R.M. Young Model 8002 propvane anemometers on a vertical plane array (VPA) located 10 m upwind of the test turbine in the prevailing wind direction. The major objective of this test was to determine the sensitivity of the S809 airfoil to roughness on a rotating wind turbine blade. We examined this effect by comparing several parameters. We compared power curves to show the sensitivity of whole rotor performance to roughness. We used pressure measurements to generate pressure distributions at the 80% span which operates at a Reynolds number (Re) of 800,000. We then integrated these distributions to determine the effect of roughness on the section's lift and pressure-drag coefficients. We also used the shapes of these distributions to understand …
Date:
February 1, 1990
Creator:
Musial, W. D.; Butterfield, C. P. & Jenks, M. D.
Object Type:
Article
System:
The UNT Digital Library
Confined Vortex Scrubber
The program objective is to demonstrate efficient removal of fine particulates to sufficiently low levels to meet proposed small scale coal combustor emission standards. This is to be accomplished using a novel particulate removal device, the Confined Vortex Scrubber. This is the first quarterly technical progress report under this contract. Accordingly, a summary of the cleanup concept and the structure of the program is given here.
Date:
February 1, 1990
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library