scholarly journals Sample Elimination for Generating Poisson Disk Sample Sets

2015 ◽  
Vol 34 (2) ◽  
pp. 25-32 ◽  
Author(s):  
Cem Yuksel
Keyword(s):  
Disk Sample

DEVELOPING A TOOL FOR A QUALITATIVE MEASUREMENT OF PINNING FORCES USING ROTATIONAL MAGNETIZATION EXPERIMENTS

2009 ◽  
Vol 23 (05) ◽  
pp. 711-722
Author(s):  
I. M. OBAIDAT
Keyword(s):  
High Temperature Superconductors ◽  
Magnetization Vector ◽  
Sample Surface ◽  
Rate Of Change ◽  
Magnetic Flux Density ◽  
Zero Field ◽  
Average Strength ◽  
Rotational Angle ◽  
Sample Rotation ◽  
Disk Sample

We have investigated the behavior of vortices in a polycrystalline YBa 2 Cu 3 O 7-δ disk sample using rotational magnetization-vector (RMV) measurements. The measurements were conducted in the field-cooled (FC) and the zero-field cooled (ZFC) states for several values of applied magnetic field parallel to the sample surface at 4.2 K and for various angles of rotation (θ rot ) up to 360°. The total magnetic flux density, B, in the sample at any rotational angle was considered to be composed of two types of vortices: weakly pinned vortices that rotate frictionally in the opposite direction of sample rotation and strongly pinned vortices that rotate rigidly in the same direction of sample rotation. From the rate of change of these two types of vortices and the rate of change of B, we were able to develop a tool to qualitatively describe the average strength of pinning centers in high-temperature superconductors.

Glow Discharge Sputter Atomization for Atomic Absorption Analysis of Nonconducting Powder Samples

1988 ◽  
Vol 42 (6) ◽  
pp. 941-944 ◽  
Author(s):  
Michael R. Winchester ◽  
R. Kenneth Marcus
Keyword(s):  
Glow Discharge ◽  
Atomic Absorption ◽  
Matrix Material ◽  
Absorption Spectrometry ◽  
Copper Matrix ◽  
Oxide Powder ◽  
Absorption Analysis ◽  
Host Matrix ◽  
Powder Samples ◽  
Disk Sample

A methodology has been developed for the analysis of nonconducting (oxide) powder samples by glow discharge atomization-atomic absorption spectrometry (GDA-AAS). The mixing of an oxide powder with a copper host matrix (1:9) allows pressing of a disk sample for glow discharge sputtering. Sample-to-sample precisions are on the order of 3–4% for iron in a geological specimen. The ability to generate analytical working curves is demonstrated for the analysis of iron by mixing Fe (III) and Al (III) oxides in the copper matrix material. The possible utility of the methodology is illustrated by the analysis of iron in an NBS geological reference material. The ability to perform analyses of these sample types suggests its applicability to such matrices as ceramics, glasses, and refractory-based catalysts.

A Rotating-Disk Sample Holder for the Sparking of Flat-Metal-Disk Samples

1971 ◽  
Vol 25 (6) ◽  
pp. 678-680 ◽  
Author(s):  
P. E. Walters ◽  
T. Monaci
Keyword(s):  
Rotating Disk ◽  
Sample Holder ◽  
Metal Disk ◽  
Disk Sample

scholarly journals COMPARATIVE RADIOGRAPHIC ASSESSMENT OF A NEW BIOCERAMIC-BASED ROOT CANAL SEALER

2017 ◽  
Vol 90 (2) ◽  
pp. 226-230 ◽  
Author(s):  
Dana Hrab ◽  
Andrea Maria Chisnoiu ◽  
Mindra Eugenia Badea ◽  
Marioara Moldovan ◽  
Radu Marcel Chisnoiu
Keyword(s):  
Statistical Analysis ◽  
Computer Analysis ◽  
Root Canal ◽  
Filling Material ◽  
Root Canal Sealer ◽  
Radiographic Assessment ◽  
Equivalent Thickness ◽  
Analysis Of The Images ◽  
Root Canal Sealers ◽  
Disk Sample

Background and aims. The aim of this study was to assess the radiopacity of two bioceramic-based root canal sealers, the conventional TotalFill BC sealer (FKG Dentaire Switzerland) and a new experimental filling material developed in collaboration with 'Raluca Ripan' Institute for Research in Chemistry, Cluj-Napoca. Methods. Five disc samples were prepared using both materials (10 mm diameter x 1 mm thickness), being subjected to digital radiography together with aluminum step wedges (1 to 12 mm in thickness), in accordance with ISO 6876: 2012. Radiopacity was determined by the computer analysis of the images obtained. Four different areas were selected for each sample, corresponding to a disk-sample quadrant. Statistical analysis was performed using ANOVA.Results. Both materials showed a radiopacity that was 3 mm greater than the equivalent thickness of aluminum. Total Fill BC showed greater radiopacity than the experimental material, but the differences were not statistically significant. Conclusions. Both materials comply with ISO 6876: 2012 recommendations on minimum radiopacity.

Rotating-Disk-Sample Electrode Method

1963 ◽  
Vol 17 (3) ◽  
pp. 76-77 ◽  
Author(s):  
M. S. Wang
Keyword(s):  
Rotating Disk ◽  
Electrode Method ◽  
Disk Sample

Wear Resistance of Aluminized Steel Plates

2011 ◽  
Vol 56 (4) ◽  
pp. 871-882 ◽  
Author(s):  
K. Żaba
Keyword(s):  
Heat Treatment ◽  
Wear Resistance ◽  
Abrasion Resistance ◽  
Rotating Disk ◽  
Steel Plates ◽  
Steel Strips ◽  
Aluminized Steel ◽  
Before And After ◽  
Coating Mass ◽  
Disk Sample

Wear Resistance of Aluminized Steel Plates The results of the abrasion resistance measurements of aluminized steel strips are presented in the hereby paper. Steel strips of DX52D+AS120 grade, before and after a heat treatment at temperatures of 200-1000°C for 1 - 5760 minutes, were tested. Tests of the abrasion resistance were carried on in a specially built device: rotating disk - sample performing a plane-rotary motion, with an application of a lubricating medium. Examinations of the abrasion resistance were also performed by means of the block-on-ring tester. Estimations of a coating mass loss, roughness and thickness changes were carried on. The obtained results are illustrated by diagrams and macro- and micro-observations. Phase analysis investigations were also performed on samples selected after the abrasibility testing. The range of the heat treatment parameters - after which the Al-Si coating increased its abrasion resistance - was estimated.

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