Applications of the Weibull Method of Statistical Analysis of Strength Parameters of Dental Materials

1990 ◽  
pp. 141-147 ◽  
Author(s):  
W. G. de Rijk ◽  
J. A. Tesk ◽  
R. W. Penn ◽  
J. Marsh
Keyword(s):  
Statistical Analysis ◽  
Dental Materials ◽  
Strength Parameters

Calcul de la résistance pondérée en flexion des poutres à section mixte

1983 ◽  
Vol 10 (1) ◽  
pp. 69-77
Author(s):  
A. Picard ◽  
D. Beaulieu
Keyword(s):  
Statistical Analysis ◽  
Concrete Beams ◽  
Composite Beams ◽  
Reinforced Concrete Beams ◽  
English Version ◽  
Strength Parameters ◽  
Performance Factor ◽  
Global Performance ◽  
Ultimate Moment ◽  
The One

In this paper, two methods of analysis used to determine the factored moment resistance of composite beams are compared. The first method is the one recommended by Standard CAN3-S16.1-M78 (1980 revision). The second method gives the ultimate moment resistance which is multiplied by a "global" performance factor to obtain the factored moment resistance. An elaborate statistical analysis where the variability of the strength parameters has been taken into account was carried out to determine this "global" performance factor. The proposed value is based on the results of 12 420 computer analyses.The authors believe that the second method of analysis is more coherent. Moreover, that method is similar to the method used to determine the flexural strength of reinforced concrete beams. Since one of the objectives of code writing committees is to produce consistent standards, the second method seems more appropriate. (An English version of this paper is available upon request.)

Optimization of the structure of titanium scaffolds reproducing the concellous bone

2021 ◽  
Vol 25 (3-4) ◽  
pp. 5-12
Author(s):  
Konstanty Skalski ◽  
Ryszard Filipowski
Keyword(s):  
Statistical Analysis ◽  
Laser Beam ◽  
Porous Structure ◽  
Cancellous Bone ◽  
Strength Parameters ◽  
Geometrical Size ◽  
Independent Variables ◽  
3D Cad ◽  
Dependent Variables ◽  
Material Feature

The paper presents the scopes of examination of the cancellous bone, 3D CAD design of scaffolds of the cancellous bone and their creation with a laser beam in SLM incremental technology. The geometrical size of the scaffold and the material feature corresponding to the Young's modulus are the parameters describing the porous structure of the cancellous bone. In the statistical analysis, these values are defined as independent variables. The physical properties of the scaffold are defined by the strength parameters determined by hardness (e.g. HIT, HM, HV and are dependent variables). The REGMULT multiple regression program was used to develop the research results. However, to optimize the porous structure of the scaffold, the single-criteria optimization program SYEQL3 was used.

Spatial Variability Analysis of Soil Properties using Geostatistics

2016 ◽  
pp. 195-226 ◽  
Author(s):  
Anand J Puppala ◽  
Tejo V Bheemasetti ◽  
Haifeng Zou ◽  
Xinbao Yu ◽  
Aravind Pedarla ◽  
...  
Keyword(s):  
Statistical Analysis ◽  
Spatial Variability ◽  
Soil Properties ◽  
Test Data ◽  
Strength Parameters ◽  
Variability Analysis ◽  
Reliability Based Design ◽  
Piezocone Penetration Test ◽  
Infrastructure Design ◽  
Exploratory Stage

Spatial variability in soil properties is still in the exploratory stage and, despite of an increase in probabilistic and statistical analysis, many challenges remain in using spatial variability of soil properties in practical designs. This chapter addresses the problem of how to incorporate spatial variability of soil properties by using Geostatistics. Existing researches in variability analysis tend to focus on the distribution of the soil properties, reliability based design and simulation of random fields. However, there is limited evidence that researchers have approached the issue of spatial variability in soil properties. Consequently, the aim of this chapter is to develop a framework for incorporating spatial variability in soil properties in prediction analysis and how it could be applied to infrastructure design. The developed framework is validated by performing spatial variability analysis of soil strength parameters evaluated from the piezocone penetration test data.

scholarly journals Design Properties of Silicon Nitride for High Temperature Gas Turbine Application

1977 ◽  
Author(s):  
J. C. Uy ◽  
R. M. Williams ◽  
L. R. Swank
Keyword(s):  
Statistical Analysis ◽  
Silicon Nitride ◽  
Test Procedure ◽  
Strength Properties ◽  
Engineering Properties ◽  
Statistical Nature ◽  
Strength Parameters ◽  
Weibull Statistical Analysis ◽  
High Temperature Gas ◽  
Sintered Silicon

Engineering properties useful in design are presented for both hot pressed and reaction sintered silicon nitride. In particular, the statistical nature of strength properties is discussed from the standpoint of cause of strength scatter, effect of sample preparation and test procedure, Weibull statistical analysis, and the application of Weibull strength parameters.

scholarly journals Development of electrospun-based polyetherimide fibers and diameter analysis for potential use in dental materials

2021 ◽  
Vol 24 (2) ◽  
pp. 5
Author(s):  
Elisa Camargo Kukulka ◽  
Tabata Prado Sato ◽  
Karen Cristina Archangelo ◽  
Jéssica Dias Santos ◽  
Joyce Rodrigues De Souza ◽  
...  
Keyword(s):  
Statistical Analysis ◽  
Dental Materials ◽  
Electrospun Fibers ◽  
Diameter Measurement ◽  
Sem Images ◽  
Electrospinning Technique ◽  
Significant Difference ◽  
Processing Program ◽  
Post Hoc ◽  
Potential Use

Objetives: this study aimed to fabricate electrospun-based polyetherimide (PEI) fibers, under controlled parameters, and to perform a diameter analysis for potential mechanical improvement of dental materials. Material and Methods: PEI pallets (0.75 g) were dissolved in 2 mL of chloroform and then processed by electrospinning, under a flow rate of 1mLh1 , three different electrical voltages (10kV, 15kV and 20kV) and three distances (10 cm, 15 cm and 18 cm) between the needle tip and collector. These parameter combinations resulted in nine experimental groups that were analyzed using scanning electron microscopy (SEM) and image processing program for diameter measurement. Statistical analysis was performed using two-way ANOVA with post-hoc Tukey (5% significance). Results: from SEM images it was possible to observe formation of solid, misaligned and flawless defect-free fibers. And from the statistical analysis, distance (p = 0,0026) and the electric tension (p = 0,0012) showed a significant difference, but not for interaction between then (p = 0,4486). Conclusion: thus, it can be concluded that there is a possibility of the morphology control of PEI electrospun fibers, such as diameter, that can be used for a variety of applications such as incorporation in dental materials in order to improve its properties. Keywords Electrospinning technique; Fibers; Polyetherimide; Polymer.

Statistical analysis of classification

1966 ◽  
Vol 24 ◽  
pp. 188-189
Author(s):  
T. J. Deeming
Keyword(s):  
Multivariate Analysis ◽  
Statistical Analysis ◽  
Classification Scheme ◽  
Analytical Procedure ◽  
Narrow Band ◽  
Scientific Research ◽  
Maximum Amount ◽  
Amount Of Information

If we make a set of measurements, such as narrow-band or multicolour photo-electric measurements, which are designed to improve a scheme of classification, and in particular if they are designed to extend the number of dimensions of classification, i.e. the number of classification parameters, then some important problems of analytical procedure arise. First, it is important not to reproduce the errors of the classification scheme which we are trying to improve. Second, when trying to extend the number of dimensions of classification we have little or nothing with which to test the validity of the new parameters.Problems similar to these have occurred in other areas of scientific research (notably psychology and education) and the branch of Statistics called Multivariate Analysis has been developed to deal with them. The techniques of this subject are largely unknown to astronomers, but, if carefully applied, they should at the very least ensure that the astronomer gets the maximum amount of information out of his data and does not waste his time looking for information which is not there. More optimistically, these techniques are potentially capable of indicating the number of classification parameters necessary and giving specific formulas for computing them, as well as pinpointing those particular measurements which are most crucial for determining the classification parameters.

Quantitative parallel EELS spectrum imaging developed as a new tool in AEM

1992 ◽  
Vol 50 (2) ◽  
pp. 1202-1203
Author(s):  
Gianluigi Botton ◽  
Gilles L'espérance
Keyword(s):  
Statistical Analysis ◽  
Spatial Resolution ◽  
Personal Computer ◽  
Systematic Study ◽  
Present Author ◽  
Chemical Elements ◽  
Detection Limits ◽  
Research Groups ◽  
Quantitative Performance ◽  
Spectrum Imaging

As interest for parallel EELS spectrum imaging grows in laboratories equipped with commercial spectrometers, different approaches were used in recent years by a few research groups in the development of the technique of spectrum imaging as reported in the literature. Either by controlling, with a personal computer both the microsope and the spectrometer or using more powerful workstations interfaced to conventional multichannel analysers with commercially available programs to control the microscope and the spectrometer, spectrum images can now be obtained. Work on the limits of the technique, in terms of the quantitative performance was reported, however, by the present author where a systematic study of artifacts detection limits, statistical errors as a function of desired spatial resolution and range of chemical elements to be studied in a map was carried out The aim of the present paper is to show an application of quantitative parallel EELS spectrum imaging where statistical analysis is performed at each pixel and interpretation is carried out using criteria established from the statistical analysis and variations in composition are analyzed with the help of information retreived from t/γ maps so that artifacts are avoided.

Intensive course in dental materials for teachers of dental auxiliaries

1973 ◽  
Vol 37 (2) ◽  
pp. 39-42
Author(s):  
JB Moser ◽  
EP Lautenschlager ◽  
BK Moore ◽  
EH Greener
Keyword(s):  
Dental Materials ◽  
Intensive Course ◽  
Dental Auxiliaries
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