scholarly journals Design of field tests and analysis of experimental results for L. S. E. 7 meter collector foundations, Shenandoah, Georgia

1979 ◽  
Author(s):  
H E Auld
Keyword(s):  
Field Tests ◽  
Experimental Results

Experimental results on the Japanese LCT coil in the IFSMTF: pulsed field tests and extended-condition tests

1988 ◽  
Vol 24 (2) ◽  
pp. 767-770 ◽  
Author(s):  
K. Okuno ◽  
T. Kato ◽  
Y. Takahashi ◽  
F. Iida ◽  
H. Tsuji ◽  
...  
Keyword(s):  
Field Tests ◽  
Experimental Results ◽  
Pulsed Field

scholarly journals ELASTOMERIC COMPOSITIONS FOR THE PRODUCTION OF RUBBER ARTIFACTS USED IN SHOE MANUFACTURING AND CIVIL CONSTRUCTION

1993 ◽  
Vol 1 (1) ◽  
pp. 23-28
Author(s):  
Jose Claudio Del Pino ◽  
Anildo Bristoti ◽  
Mario Pinheiro
Keyword(s):  
Sugar Cane ◽  
Field Tests ◽  
Sugar Cane Bagasse ◽  
Experimental Results ◽  
Practical Applications ◽  
Inert Filler ◽  
Shoe Manufacturing ◽  
Shoe Soles ◽  
Styrene Butadiene

Sugar cane bagasse is a common byproduct of the aZaohoZ and sugar industries. In the present work, we describe the preparation of elastomeric agglomerates containing SBR [poly(styrene-butadiene)] and bagasse or kaolin as inert filler. The experimental results and a series of laboratory and field tests show that the sugar cane bagasse agglomerate can be very appropriate and useful for practical applications, especially in the manufacture of shoe soles.

Analysis of polyethylene pipe behaviour in horizontal directional drilling field tests

2005 ◽  
Vol 32 (4) ◽  
pp. 665-677 ◽  
Author(s):  
Maria Anna Polak
Keyword(s):  
Drilling Fluid ◽  
Field Tests ◽  
Experimental Results ◽  
Pipe Material ◽  
Directional Drilling ◽  
Horizontal Directional Drilling ◽  
Polyethylene Pipe ◽  
Polyethylene Pipes ◽  
Pulling Force ◽  
The University

The paper presents results of both tests and analysis of polyethylene pipes installed using horizontal directional drilling (HDD). A total of seven full-scale HDD field installations were performed at the University of Waterloo. The test parameters were pull length, overcut ratio, quality of the drilling fluid, pipe diameter, and pipe material. The paper presents an overview of the testing methodology, instrumentation, and test specimens. The method for measuring strains along the length of the pipe is presented and discussed. Experimental results concentrate on pipe strains due to bending and axial deformations during HDD. Post-installation axial strains are also presented. A predictive model has been developed to analyze the pipe under various installation conditions. The model accounts for major mechanical contributions to the pulling force in HDD installations. The emphasis in this paper is on the comparison between theoretical and experimental results and the discussion of factors influencing pulling loads and strains in polyethylene pipes installed using HDD.Key words: horizontal directional drilling, polyethylene, pipe, analysis, tests, strain, pulling loads.

An Empirical Model of Ribbed Cylindrical Glass Reinforced Plastic Tanks

2012 ◽  
Vol 232 ◽  
pp. 51-56
Author(s):  
Siamak Noroozi ◽  
John Vinney ◽  
Philip Sewell ◽  
Rasoul Khandan
Keyword(s):  
Structural Integrity ◽  
Design Method ◽  
Field Tests ◽  
Experimental Results ◽  
Destructive Testing ◽  
Element Analysis ◽  
Cylindrical Glass ◽  
Reinforced Plastic ◽  
Wide Range ◽  
Tank Design

Ribbed cylindrical Glass Reinforced Plastic (GRP) tanks are currently designed using simplified theory the results of which are then verified by extensive destructive testing. This approach is expensive and can only generate non-optimal design solutions. In addition, there is often a high degree of discrepancy between theoretical and experimental results which necessitates the use of undesirably high factors of safety, which in turn results in the excessive use of material with the concomitant increase in cost, weight and manufacturing time. The primary aim of this investigative research was to develop a more deterministic and accurate design method of predicting the structural integrity and performance of underground cylindrical GRP tanks using non-destructive testing. Linear and non-linear Finite Element Analysis (FEA) techniques, validated against experimental results, were used to analyze a large number of underground ribbed cylindrical GRP tanks. The outcome of which was then expressed in the form of an empirical ‘Design Formula’ which provides a comprehensive solution to ribbed cylindrical GRP tank design for a wide range of tank sizes, laminate lay-ups and material properties. It is intended that the application of this method will eliminate the need for the expensive field tests that are currently required by design codes and standards.

RADIO INTERFEROMETRY DEPTH SOUNDING: PART II—EXPERIMENTAL RESULTS

Geophysics ◽  
1973 ◽  
Vol 38 (3) ◽  
pp. 581-599 ◽  
Author(s):  
James R. Rossiter ◽  
Gerald A. LaTorraca ◽  
A. Peter Annan ◽  
David W. Strangway ◽  
Gene Simmons
Keyword(s):  
Loss Tangent ◽  
Field Tests ◽  
Thin Layers ◽  
Experimental Results ◽  
Scale Model ◽  
Radio Waves ◽  
Depth Sounding ◽  
Transmitting Antenna ◽  
Crude Estimate

In such highly resistive geologic environments as ice sheets, salt layers, and the moon’s surface, radio waves penetrate with little attenuation. The field strengths about a transmitting antenna placed on the surface of such an environment exhibit interference maxima and minima which are indicative of the in‐situ electrical properties and the presence of subsurface layering. Experimental results from an analog scale model and from field tests on two glaciers are interpreted on the basis of the theoretical results of Part I. If the upper layer is thick, the pattern is very simple and the dielectric constant of the layer can be easily determined. An upper bound on the loss tangent can be estimated. For thin layers, the depth can be determined if the loss tangent is less than about 0.10, and a crude estimate of scattering can be made.

scholarly journals Prototyping, Testing, and Redesign of a Three-Wheel Trekking Wheelchair for Accessible Tourism Applications

2021 ◽  
Vol 11 (20) ◽  
pp. 9641
Author(s):  
Gabriele Baronio ◽  
Ileana Bodini ◽  
Barbara Motyl ◽  
Stefano Uberti
Keyword(s):  
Initial Phase ◽  
Field Tests ◽  
Experimental Results ◽  
Kinematics And Dynamics ◽  
Physical Effort ◽  
Passenger Comfort ◽  
Impaired Mobility ◽  
Testing Phase ◽  
Experimental Field

This work is part of the project called “Gölem project”, started in 2017, about special devices developed to enable the so-called Accessible Tourism. This project aims to design and develop a trekking wheelchair for people with impaired mobility. After an initial phase of design and prototyping, the testing phase has now begun. The objective is to validate several aspects of the design, concerning basic kinematics and dynamics, passenger comfort and physical effort of the carriers. This paper describes the development of qualitative tests for drivability and balance validation of this first prototype. At this stage, a list of features to be investigated was made, suitable trekking paths were chosen, and qualitative experimental field tests were performed. Then, the design of the prototype was modified according to these first experimental results, to improve the wheelchair characteristics. The prototype is now undergoing the modification phase, then further testing will be performed with the use of specific instrumental devices to evaluate the wheelchair itself and to perform the kinematic, dynamical, and comfort characterization.

Diagnostics of Gold Laser Plasmas

1988 ◽  
Vol 102 ◽  
pp. 357-360
Author(s):  
J.C. Gauthier ◽  
J.P. Geindre ◽  
P. Monier ◽  
C. Chenais-Popovics ◽  
N. Tragin ◽  
...  
Keyword(s):  
Experimental Results ◽  
Pure Gold ◽  
Electronic Temperature ◽  
X Ray ◽  
Laser Plasmas ◽  
Collisional Radiative Model ◽  
Radiative Model

AbstractIn order to achieve a nickel-like X ray laser scheme we need a tool to determine the parameters which characterise the high-Z plasma. The aim of this work is to study gold laser plasmas and to compare experimental results to a collisional-radiative model which describes nickel-like ions. The electronic temperature and density are measured by the emission of an aluminium tracer. They are compared to the predictions of the nickel-like model for pure gold. The results show that the density and temperature can be estimated in a pure gold plasma.

Observation of Phase Contrast Images in STEM and CTEM Modes by Using 100 kV Field Emission Electron Gun

1974 ◽  
Vol 32 ◽  
pp. 390-391
Author(s):  
Y. Harada ◽  
T. Goto ◽  
H. Koike ◽  
T. Someya
Keyword(s):  
Field Emission ◽  
Phase Contrast ◽  
Image Formation ◽  
Fresnel Diffraction ◽  
Experimental Results ◽  
Electron Gun ◽  
Scanning Microscopy ◽  
Emission Electron ◽  
Lattice Images

Since phase contrasts of STEM images, that is, Fresnel diffraction fringes or lattice images, manifest themselves in field emission scanning microscopy, the mechanism for image formation in the STEM mode has been investigated and compared with that in CTEM mode, resulting in the theory of reciprocity. It reveals that contrast in STEM images exhibits the same properties as contrast in CTEM images. However, it appears that the validity of the reciprocity theory, especially on the details of phase contrast, has not yet been fully proven by the experiments. In this work, we shall investigate the phase contrast images obtained in both the STEM and CTEM modes of a field emission microscope (100kV), and evaluate the validity of the reciprocity theory by comparing the experimental results.

A new dissociation mode for dislocations in silicon

1978 ◽  
Vol 36 (1) ◽  
pp. 346-347
Author(s):  
A. Ourmazd ◽  
G.R. Booker ◽  
C.J. Humphreys
Keyword(s):  
Detailed Examination ◽  
Experimental Results ◽  
Dislocation Network ◽  
Weak Beam ◽  
Phosphorus Doped

A (111) phosphorus-doped Si specimen, thinned to give a TEM foil of thickness ∼ 150nm, contained a dislocation network lying on the (111) plane. The dislocation lines were along the three <211> directions and their total Burgers vectors,ḇt, were of the type , each dislocation being of edge character. TEM examination under proper weak-beam conditions seemed initially to show the standard contrast behaviour for such dislocations, indicating some dislocation segments were undissociated (contrast A), while other segments were dissociated to give two Shockley partials separated by approximately 6nm (contrast B) . A more detailed examination, however, revealed that some segments exhibited a third and anomalous contrast behaviour (contrast C), interpreted here as being due to a new dissociation not previously reported. Experimental results obtained for a dislocation along [211] with for the six <220> type reflections using (g,5g) weak-beam conditions are summarised in the table below, together with the relevant values.

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