Modal Analysis of Closed Banded Structures by Radial Point Counting

1970 ◽  
Vol 78 (5) ◽  
pp. 589-596
Author(s):  
Bradford B. Van Diver ◽  
Gustave Rabson
Keyword(s):  
Modal Analysis ◽  
Point Counting

A chart for designing modal analysis by point counting

1966 ◽  
Vol 55 (3) ◽  
pp. 844-848 ◽  
Author(s):  
M. Solomon ◽  
R. Green
Keyword(s):  
Modal Analysis ◽  
Point Counting

scholarly journals Modal Analysis of Rock Forming Minerals: Contribution of XRD/Rietveld Analysis Compared to the Classic Point Counting Method

2021 ◽  
Vol 19 (5) ◽  
pp. 395-413
Author(s):  
Hamza Samouh ◽  
Shoji Nishimoto ◽  
Hidekazu Yoshida ◽  
Shohei Sawada ◽  
Osamu Kontani ◽  
...  
Keyword(s):  
Modal Analysis ◽  
Rietveld Analysis ◽  
Point Counting ◽  
Counting Method

DENSITY-FRACTION X-RAY ANALYSIS: A NEW TECHNIQUE OF MODAL ANALYSIS OF ROCKS

1967 ◽  
Vol 4 (6) ◽  
pp. 1093-1117 ◽  
Author(s):  
George Erdosh
Keyword(s):  
Modal Analysis ◽  
Instrumental Method ◽  
Point Counting ◽  
Rock Powder ◽  
X Ray ◽  
Density Fractions ◽  
Rock Types ◽  
Unreliable Method ◽  
A New Technique ◽  
Analytical Time

Point counting, the present and often unreliable method of modal analysis of rocks, is unsatisfactory for many rock types. An instrumental technique that could be routinely performed by a technician is highly desirable. X-ray powder diffraction has been critically evaluated for this purpose and was found to be a suitable instrumental method when combined with density separation. A practical technique is thus proposed in which the rock powder is split into three density fractions by heavy-liquid separations and each fraction is quantitatively analyzed for its major constituents by X-ray diffraction. Altogether 28 minerals are considered, which are constituents of most igneous and many metamorphic rocks, and calibration curves are given for ten of these. With one exception, the precision was found to be reasonably good for the minerals determined. The accuracy of the technique could not be tested satisfactorily. The analytical time varies from 2 to 4 man-hours per sample depending on the rock type. Although the study is somewhat preliminary and the proposed technique is incomplete, it already shows some obvious advantages over point counting for many rock types.

A New System For Optomanual Semiautomatic Quantitative Image Analysis

1977 ◽  
Vol 35 ◽  
pp. 210-211
Author(s):  
H.P. Rohr
Keyword(s):  
Image Analysis ◽  
Volume Density ◽  
List Type ◽  
Distribution Analysis ◽  
Type Number ◽  
Point Counting ◽  
Human Eye ◽  
Quantitative Image ◽  
Point Density ◽  
Electronic Counting

Today, in image analysis the broadest possible rationalization and economization have become desirable. Basically, there are two approaches for image analysis: The image analysis through the so-called scanning methods which are usually performed without the human eye and the systems of optical semiautomatic analysis completely relying on the human eye.The new MOP AM 01 opto-manual system (fig.) represents one of the very promising approaches in this field. The instrument consists of an electronic counting and storing unit, which incorporates a microprocessor and a keyboard for choice of measuring parameters, well designed for easy use.Using the MOP AM 01 there are three possibilities of image analysis:the manual point counting,the opto-manual point counting andthe measurement of absolute areas and/or length (size distribution analysis included).To determine a point density for the calculation of the corresponding volume density the intercepts lying within the structure are scanned with the light pen.

A Comparison Between Sterological Point Counting and Digitizing Tablets

1985 ◽  
Vol 43 ◽  
pp. 666-667
Author(s):  
John M. Basgen ◽  
Eileen N. Ellis ◽  
S. Michael Mauer ◽  
Michael W. Steffes
Keyword(s):  
Electron Microscopy ◽  
Kidney Tissue ◽  
Volume Density ◽  
Diabetic Patients ◽  
Normal Kidney ◽  
Point Counting ◽  
Normal Kidney Tissue ◽  
Biopsy Specimens ◽  
Mitochondrial Volume ◽  
Kidney Lesions

To determine the efficiency of methods of quantitation of the volume density of components within kidney biopsies, techniques involving a semi-automatic digitizing tablet and stereological point counting were compared.Volume density (Vv) is a parameter reflecting the volume of a component to the volume that contains the component, e.g., the fraction of cell volume that is made up of mitochondrial volume. The units of Vv are μm3 /μm3.Kidney biopsies from 15 patients were used. Five were donor biopsies performed at the time of kidney transplantation (patients 1-5, TABLE 1) and were considered normal kidney tissue. The remaining biopsies were obtained from diabetic patients with a spectrum of diabetic kidney lesions. The biopsy specimens were fixed and embedded according to routine electron microscogy protocols. Three glomeruli from each patient were selected randomly for electron microscopy. An average of 12 unbiased and systematic micrographs were obtained from each glomerulus and printed at a final magnification of x18,000.

Modal Analysis of Turbulent Flow near an Inclined Bank–Longitudinal Structure Junction

2021 ◽  
Vol 147 (3) ◽  
pp. 04020100
Author(s):  
Nasser Heydari ◽  
Panayiotis Diplas ◽  
J. Nathan Kutz ◽  
Soheil Sadeghi Eshkevari
Keyword(s):  
Turbulent Flow ◽  
Modal Analysis ◽  
Longitudinal Structure

Effect of Bass Bar Tension on Modal Parameters of a Violin's Top Plate

2015 ◽  
Vol 39 (1) ◽  
pp. 145-149 ◽  
Author(s):  
Ewa B. Skrodzka ◽  
Bogumił B.J. Linde ◽  
Antoni Krupa
Keyword(s):  
Modal Analysis ◽  
Experimental Modal Analysis ◽  
Mode Shapes ◽  
Modal Parameters ◽  
Normal Value ◽  
Modal Damping

Abstract Experimental modal analysis of a violin with three different tensions of a bass bar has been performed. The bass bar tension is the only intentionally introduced modification of the instrument. The aim of the study was to find differences and similarities between top plate modal parameters determined by a bass bar perfectly fitting the shape of the top plate, the bass bar with a tension usually applied by luthiers (normal), and the tension higher than the normal value. In the modal analysis four signature modes are taken into account. Bass bar tension does not change the sequence of mode shapes. Changes in modal damping are insignificant. An increase in bass bar tension causes an increase in modal frequencies A0 and B(1+) and does not change the frequencies of modes CBR and B(1-).

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