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139
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2,354 Matching Results
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The C.A.M.S. 54 G.R. Transatlantic Seaplane (French)
Tested at the end of March, 1928, the C.A.M.S. 54 G.R. was built for the purpose of crossing the Atlantic from Europe by way of the azores. It has a biplane construction with wings mounted above the hull. It is powered by two new series 500 HP. geared Hispano Suiza V type engines.
Date:
September 1928
Creator:
Ide, John Jay
Object Type:
Report
System:
The UNT Digital Library
Lecture on Aerodynamics
This lecture deals with four main subjects: methods of studying air resistance, experimental aerodynamics, propellers and stability of airplanes.
Date:
September 1923
Creator:
Toussaint, A.
Object Type:
Report
System:
The UNT Digital Library
Drag Measurements on a Junkers Wing Section: Application of the Betz Method to the Results of Comparative Tests Made on a Model and on an Airplane in Flight
The comparison of model tests in flight can be based on the result of such measurements. They are very important from the aerodynamical point of view, as they lead to useful conclusions regarding the behavior of the wing, its best shape and the conformity of theoretical and actual flow. Although there still remains a certain prejudice against such measurements, I have still attempted to make these comparative tests in order to inspire confidence in their reliability.
Date:
September 1927
Creator:
Weidinger, Hanns
Object Type:
Report
System:
The UNT Digital Library
Recent Developments in the Construction and Operation of All-Metal Airplanes
Experiments on the effect of atmosphere and of sea water on the building materials employed by us have been carried on for years in the North Sea with the aid of the Hamburg Naval Observatory. Parallel experiments are being made at the Pisa Naval Observatory in the Mediterranean Sea. Metal sheets, sections, assemblies and experimental floats are being exposed to the action of the elements. Different construction techniques are discussed and a variety of specific airplanes are presented which incorporate some of the new thinking.
Date:
September 1926
Creator:
Dornier, C.
Object Type:
Report
System:
The UNT Digital Library
Atomization of Liquid Fuels Part 3: Critical Discussion of Experimental Reesults, Mixing the Atomized Fuel with Air
This report provides a critical discussion of the results of the experiments conducted in the previous NACA-TM's 329 and 330. The main object of this investigation was to determine the size of the drops in mechanical atomization.
Date:
September 1925
Creator:
Kuehn, R.
Object Type:
Report
System:
The UNT Digital Library
Motive Power Required to Operate a Wind Tunnel
The use of exit cones and different blade configurations to reduce the motive power required in wind tunnels is discussed in this report.
Date:
September 1924
Creator:
Ziembinski, S.
Object Type:
Report
System:
The UNT Digital Library
Experiments With Airplane Brakes
This report begins by examining the forces on the brake shoes. For the determination of the load distribution over the shoes it was assumed that the brake linings follow Hooke's law, are neatly fitted and bedded in by wear. The assumption of Hooke's law, that is, the proportionality between compression of the lining and the absorption of force, is fulfilled to a certain extent for the loading, as becomes apparent from the load tests described further on. But there is a material discrepancy at unloading.
Date:
September 1931
Creator:
Michael, Franz
Object Type:
Report
System:
The UNT Digital Library
The TRIO Experiment
The TRIO experiment is a test of in-situ tritium recovery and heat transfer performance of a miniaturized solid breeder blanket assembly. The assembly (capsule) was monitored for temperature and neutron flux profiles during irradiation and a sweep gas flowed through the capsule to an analytical train wherein the amounts of tritium in its various chemical forms were determined. The capsule was designed to operate at different temperatures and sweep gas conditions. At the end of the experiment the amount of tritium retained in the solid was at a concentration of less than 0.1 wppM. More than 99.9% of tritium generated during the experiment was successfully recovered. The results of the experiment showed that the tritium inventories at the beginning and at the end of the experiment follow a relationship which appears to be characteristic of intragranular diffusion.
Date:
September 1984
Creator:
Clemmer, Robert G.
Object Type:
Report
System:
The UNT Digital Library
DISPL1: a Software Package for One and Two Spatially Dimensioned Kinetics-Diffusion Problems
DISPL1 is a software package for solving some second order nonlinear systems of partial differential equations including parabolic, elliptic, hyperbolic, and some mixed types such as parabolic-elliptic equations. Fairly general nonlinear boundary conditions are allowed as well as interface conditions for problems in an inhomogeneous media. The spatial domain is one or two dimensional with Cartesian, cylindrical, or spherical (in one dimension only) geometry. The numerical method is based on the use of Galerkin's procedure combined with the use of B-splines in order to reduce the system of PDE's to a system of ODE's. The latter system is then solved with a sophisticated ODE software package. Software features include extensive dump/restart facilities, free format input, moderate printed output capability, dynamic storage allocation, and three graphics packages.
Date:
September 1984
Creator:
Leaf, Gary K. & Minkoff, Michael
Object Type:
Report
System:
The UNT Digital Library
Ionic Equilibria and Anion Exchange of Uranyl Sulfate Solutions
Theoretical investigation on the nature of ion exchange of acidified uranyl sulfate solutions with Dowex 21K, a strong base ion exchange resin.
Date:
September 28, 1962
Creator:
Stein, P. E.
Object Type:
Report
System:
The UNT Digital Library
Accidental Radiation Excursion at the Y-12 Plant, June 16, 1958: Final Report
This report describes the circumstances leading to the accident, attempts to reconstruct the nuclear reactivity conditions, and reviews the dosimetric means and results which were used to help determine the exposure of affected employees.
Date:
September 12, 1958
Creator:
Patton, F. S.; Bailey, J. C.; Callihan, A. D.; Googin, J. M.; Jasny, G. R.; McAlduff, H. J. et al.
Object Type:
Report
System:
The UNT Digital Library
Uranium Concentration Meter
From abstract; "Two basic instruments were developed for determining the concentration of uranium in solutions. Both instruments detect the gamma activity present in a sample solution, and interpret this analysis into direct presentation as parts per million."
Date:
September 24, 1956
Creator:
Arnett, Orville
Object Type:
Report
System:
The UNT Digital Library
Fast Critical Assembly Safeguards. Summary Report, October 1978 - September 1979, Volume 2
PART 1: The effectiveness of a neutron well correlation counter (NWCC) and a random driver (RD) for plutonium-containing item assay and loss detection has been studied. The items were 4 in. x 2 in. x 1/4 in. stainless steel-clad metal plates and 6 in. x 3/8 in. stainless steel-clad oxide rods, each in two types of containment. PART 2: A neutron-counting/fuel-weighting system has been developed to provide the capability to assay the ZPR-6 and -9 plutonium fuel canisters rapidly and accurately. This system makes feasible the inline monitoring of fuel transfer from the storage vault to the fuel loading hoods and vice-versa. To exploit fully the system's potential, the equipment is intended to be used in conjunction with an on-line computer having a fuel and fuel-canister data base.
Date:
September 1980
Creator:
Winslow, G. H.; Bellinger, F. O.; Scharping, R. A.; Rusch, G. K. & Groh, E. F.
Object Type:
Report
System:
The UNT Digital Library
Statistical Identification of Effective Input Variables
This report provides background and procedural information for the use of a general-purpose Stirling-engine analysis code developed at Argonne National Laboratory and available through the National Energy Software Center. Different engine configurations are easily specified, or the user may make use of provided data for existing engines, both kinematic and free piston. The code models heat transfer and fluid mechanics throughout the engine and accounts for system energy flows and losses. Good agreement is shown between code predictions and experimental measurements. The present analysis method was chosen for fast execution and useful information on energy flows in the system. A description is provided of the code structure that is intended to accept different analysis modules that can provide improved system modeling or optimization capability.
Date:
September 1982
Creator:
Vaurio, J. K.
Object Type:
Report
System:
The UNT Digital Library
Proceedings of the 1982 Symposium on Instrumentation and Control for Fossil Energy Processes : June 7-9, 1982 Adam's Mark Hotel, Houston, Texas
This sixth symposium covers process control processes and issues involved in the conversion of fossil fuels into synthetic fuels.
Date:
September 1982
Creator:
Argonne National Laboratory
Object Type:
Report
System:
The UNT Digital Library
Fuel-Motion Diagnostics and Cineradiography
Nuclear and non-nuclear applications of cineradiography are reviewed, with emphasis on diagnostic instrumentation for in-pile transient-reactor safety testing of nuclear fuel motion. The primary instrument for this purpose has been the fast-neutron hodoscope, which has achieved quantitative monitoring of time, location, mass, and velocity of fuel movement under the difficult conditions associated with transient-reactor experiments. Alternative diagnostic devices that have been developed have not matched the capabilities of the hodoscope. Other applications for the fuel-motion diagnostic apparatus are also evolving, including time-integrated radiography and direct time- and space-resolved fuel-pin power monitoring. Although only two reactors are now actively equipped with high-resolution fuel-motion diagnostic systems, studies and tests have been carried out in and for many other reactors.
Date:
September 1982
Creator:
DeVolpi, A.
Object Type:
Report
System:
The UNT Digital Library
DYNAPCON: A Computer Code for Dynamic Analysis of Prestressed Concrete Structures
A finite element computer code for the transient analysis of prestressed concrete reactor vessels (PCRVs) for LMFBR containment is described. The method assumes rotational symmetry of the structure. Time integration is by an explicit method. The quasistatic prestressing operation of the PCRV model is performed by a dynamic relaxation technique. The material model accounts for the crushing and tensile cracking in arbitrary direction in concrete and the elastic-plastic behavior of reinforcing steel. The variation of the concrete tensile cracking and compressive crushing limits with strain rate is taken into account. Relative slip is permitted between the concrete and tendons. Several example solutions are presented and compared with experimental results. These sample problems range from simply supported beams to small scale models of PCRV's. It is shown that the analytical methods correlate quite well with experimental results, although in the vicinity of the failure load the response of the models tend to be quite sensitive to input parameters.
Date:
September 1982
Creator:
Marchertas, A. H.
Object Type:
Report
System:
The UNT Digital Library
Radiological and Environmental Research Division Annual Report: Part 4, Atmospheric Physics, January-December 1981
Annual report of the Argonne National Laboratory Radiological and Environmental Research Division regarding activities related to atmospheric physics. This report discusses the section's participation in the Atmospheric Studies in COmplex Terrain (ASCOT) experiment.
Date:
September 1982
Creator:
Stehney, A. F. & Wesely, M. L.
Object Type:
Report
System:
The UNT Digital Library
Fuel Cycle Programs, Quarterly Progress Report: April-June 1979
Quarterly report of the Argonne National Laboratory Chemical Engineering Division regarding activities related to properties and handling of radioactive materials, operation of nuclear reactors, and other relevant research.
Date:
September 1980
Creator:
Steindler, M. J.; Ader, M.; Barletta, R. E.; Bates, J. K.; Bean, C. H.; Couture, R. A. et al.
Object Type:
Report
System:
The UNT Digital Library
Advanced Fuel Cell Development Progress Report: April-June 1982
Quarterly report discussing fuel cell research and development work at Argonne National Laboratory (ANL). This report describes efforts directed toward seeking alternative cathode materials to NiO for molten carbonate fuel cells.
Date:
September 1983
Creator:
Pierce, Robert Dean & Arons, R. M.
Object Type:
Report
System:
The UNT Digital Library
An Experimental Method for Reactor-Noise Measurements of Effective Beta
A variance-to-mean noise technique, modified to eliminate systematic errors from drifting of reactor power, has been used to infer integral values of effective beta for uranium and plutonium fueled fast reactor modk-ups. The measurement technique, including corrections for a finite detector-electrometer time response, is described together with preliminary beta measurement results.
Date:
September 1981
Creator:
Bennett, E. F.
Object Type:
Report
System:
The UNT Digital Library
Guidelines for Using the AMDLIB, IMSL, and NAG Mathematical Software Libraries at ANL
This manual summarizes the numerical software contained in the Applied Mathematics Division Subroutine Library (AMDLIB), the International Mathematical and Statistical Libraries, Inc. (IMSL), and the Numerical Algorithms Group, Ltd. (NAG) mathematical libraries. Seventeen numerical analysis subjects are discussed, and the appropriate subroutines available in the three libraries for solving each type of problem are listed, with our recommendations for particular types of applications.
Date:
September 1981
Creator:
Wang, Jesse Y.; Garbow, Burton S. & Cekis, Margaret M.
Object Type:
Report
System:
The UNT Digital Library
Thermal-Performance Study of Liquid Metal Fast Breeder Reactor Insulation
Three types of metallic thermal insulation were investigated analytically and experimentally: multilayer reflective plates, multilayer honeycomb composite, and multilayer screens. Each type was subjected to evacuated and non-evacuated conditions, where thermal measurements were made to determine thermal-physical characteristics. A variation of the separation distance between adjacent reflective plates of multilayer reflective plates and multilayer screen insulation was also experimentally studied to reveal its significance. One configuration of the multilayer screen insulation was further selected to be examined in sodium and sodium oxide environments. The emissivity of Type 304 stainless steel used in comprising the insulation was measured by employing infrared technology. A comprehensive model was developed to describe the different proposed types of thermal insulation. Various modes of heat transfer inherent in each type of insulation were addressed and their relative importance compared. Provision was also made in the model to allow accurate simulation of possible sodium and sodium oxide contamination of the insulation. The thermal-radiation contribution to heat transfer in the temperature range of interest for LMFBR's was found to be moderate, and the suppression of natural convection within the insulation was vital in preserving its insulating properties. Experimental data were compared with the model and other published results. …
Date:
September 1980
Creator:
Shiu, Kelvin Kwok-Kay
Object Type:
Report
System:
The UNT Digital Library
Newton's Method with a Model Trust-Region Modification
A modified Newton method for unconstrained minimization is presented and analyzed. The modification is based upon the model trust region approach. This report contains a thorough analysis of the locally constrained quadratic minimizations that arise as sub-problems in the modified Newton iteration. Several promising alternatives are presented for solving these sub-problems in ways that overcome certain theoretical difficulties exposed by this analysis. Very strong convergence results are presented concerning the minimization algorithm. In particular, the explicit use of second-order information is justified by demonstrating that the iterates converge to a point that satisfies the second-order necessary conditions for minimization. With the exception of very pathological cases this convergence occurs whenever the algorithm is applied to problems with continuous second partial derivatives.
Date:
September 1980
Creator:
Sorensen, D. C.
Object Type:
Report
System:
The UNT Digital Library