scholarly journals An application of reflective holographic gratings for measurement of cylindrical curvature

2021 ◽  
Vol 2145 (1) ◽  
pp. 012054
Author(s):  
Chanikan Inneam ◽  
Keerayoot Srinuanjan ◽  
Witoon Yindeesuk
Keyword(s):  
Laser Beam ◽  
Linear Relationship ◽  
Diffraction Pattern ◽  
Holographic Grating ◽  
Holographic Gratings ◽  
The Relationship

Abstract This paper presented an application of reflective holographic gratings for the measurement of cylindrical curvature. The surface of the fabricated holographic grating was coated with gold by the sputtering method, where it became a reflective holographic grating. The grating was attached to the surface of various radius cylindrical objects. The diffraction pattern produced by the bent grating with different radius was observed by illuminating a laser beam normal to the grating surface. The gratings constant were calculated from the observed diffraction pattern. The relationship between the grating constants and the radius of cylindrical objects was obtained. The grating constant and the reciprocal of the radius of cylindrical objects was a linear relationship, with the least R-square between 0.85-0.97. Moreover, the y-intercept of the relationship between the grating constants and the reciprocal radius was consistent with the grating constant of the non-bended grating. As the radius of the grating approach is infinite, the reciprocal of the radius approaches zero, which is a non-bend grating. We can apply this method to measure the radius of cylindrical objects.

scholarly journals Holographic grating recording in azobenzene functionalized polymers

2006 ◽  
Vol 4 (2) ◽  
pp. 266-284 ◽  
Author(s):  
Anna Sobolewska ◽  
Andrzej Miniewicz ◽  
Eugenia Grabiec ◽  
Danuta Sek
Keyword(s):  
Refractive Index ◽  
Absorption Coefficient ◽  
Polymer Matrix ◽  
Holographic Grating ◽  
Functionalized Polymers ◽  
Wave Mixing ◽  
Holographic Gratings ◽  
Two Wave Mixing ◽  
The Relationship ◽  
Azobenzene Groups

AbstractA group of 22 polymers have been synthesized to test their suitability for recording holographic gratings. Polyamides, polyimides, polyesters and their combinations were functionalized with pendant azobenzene groups containing single or double N=N. The polymers were studied using a standard degenerate two-wave mixing technique, which enables measurement of light-induced periodic modification of polymer refractive index and absorption coefficient by analysis of the diffracted light. Two qualitatively different configurations of the holographic polarization recording were used, s-s and s-p. The relationship between structural properties of polymer matrix and azobenzene groups and the holographic grating recording kinetics and light diffraction efficiency was investigated.

Controlling of Microstructure Generation by Direct Holographic Etching of Semiconductor Substrates

1992 ◽  
Vol 285 ◽  
Author(s):  
K. Toyoda ◽  
H. Kumagai ◽  
M. Ezaki ◽  
M. Obara
Keyword(s):  
Laser Beam ◽  
Holographic Grating ◽  
Phase Distortion ◽  
Beam Irradiation ◽  
Laser Etching ◽  
Holographic Gratings ◽  
Average Spacing ◽  
Spatial Fluctuation ◽  
Single Beam ◽  
Semiconductor Substrates

ABSTRACTControlling of microstructure generation was investigated in laser etching of n-GaAs. For single-beam etching and holographic etching with high ratios of average spacing of holographic grating to average spacing of microstructures (Λh/Λr), ripple structures were fabricated. Especially in p-polarization, spatial fluctuation was greater than that in s-polarization. This might occur because phase distortion inherent in the laser beam cannot be eliminated by the p-polarization beam irradiation. For holographic etching with small Λh/Λr ratios, ripple structures were changed into grating structures because these grating structures might be generated in phase with holographic gratings.

The Structural Stability of the Concentration-Performance Relationship in Food Manufacturing

1982 ◽  
Vol 14 (2) ◽  
pp. 43-49
Author(s):  
Stephen E. Miller
Keyword(s):  
Industrial Organization ◽  
Linear Relationship ◽  
Structural Stability ◽  
Market Performance ◽  
Continuous Linear ◽  
Food Manufacturing ◽  
The Relationship

The literature of industrial organization is replete with analyses of the relationship between seller concentration and market performance. Most researchers have hypothesized a continuous linear relationship between profitability and concentration and have estimated that relationship accordingly.

Measuring Strains for Hematite Phase in Sinter Ore by Electron Backscattering Diffraction Method

2006 ◽  
Vol 326-328 ◽  
pp. 237-240 ◽  
Author(s):  
Yasushi Sasaki ◽  
Manabu Iguchi ◽  
Mitsutaka Hino
Keyword(s):  
Linear Relationship ◽  
Strain Gauge ◽  
Diffraction Method ◽  
Local Strain ◽  
Electron Backscattering ◽  
Hematite Phase ◽  
Compression Strain ◽  
Electron Backscattering Diffraction ◽  
Ebsd Technique ◽  
The Relationship

Based on the relationship between quantified blurring degree of Kikuchi bands obtained by an electron backscattering diffraction (EBSD) technique and macroscopic strains measured by a strain gauge, the local compression strain SEBSD in sinter ore has been evaluated under various conditions. There is a good linear relationship between the SEBSD and the strains measured by a strain gauge. The local strain SEBSD evaluated by EBSD patterns can be used as an index of local strains.

LA MESURE DE L’INTERFÉRENCE DU CHIENDENT DANS L’ORGE

1982 ◽  
Vol 62 (1) ◽  
pp. 183-188 ◽  
Author(s):  
R. RIOUX
Keyword(s):  
Regression Analysis ◽  
Hordeum Vulgare ◽  
Linear Relationship ◽  
Linear Relation ◽  
Shoot Density ◽  
Yield Variability ◽  
Hordeum Vulgare L ◽  
The Mean ◽  
The Relationship ◽  
Agropyron Repens

Barley (Hordeum vulgare L. ’Champlain’) was grown with quackgrass (Agropyron repens (L.) Beauv.) at various densities for 3 yr. According to the regression analysis, a linear relation is appropriate to describe the relationship between yield of barley and biomass or density of quackgrass. A greater proportion of yield variability was explained by density (64%) than by biomass (40%). Density is then a better criterion than biomass to predict yield lost in barley. The linear relationship between barley yield and the shoot density of quackgrass is estimated by the following equation: yield barley = 345.3–0.5682 dens, quackgrass. An increase of 10 shoots/m2 in the mean density of quackgrass resulted in a mean loss of 6 g/m2 in the yield of barley.

scholarly journals Methods of Controlling Lift - off in Conductivity Invariance Phenomenon for Eddy Current Testing

2020 ◽  
Author(s):  
Zhongwen Jin ◽  
Yuwei Meng ◽  
Rongdong Yu ◽  
Ruochen Huang ◽  
Mingyang Lu ◽  
...  
Keyword(s):  
Linear Relationship ◽  
Eddy Current ◽  
Coating Thickness ◽  
Test Sample ◽  
Common Point ◽  
Coil Design ◽  
Current Testing ◽  
Lift Off ◽  
Two Parameters ◽  
The Relationship

<p>Previously, a conductivity invariance phenomena (CIP) has been discovered – at a certain lift-off, the inductance change of the sensor due to a test sample is immune to conductivity variations, i.e. the inductance – lift-off curve passes through a common point at a certain lift-off, termed as conductivity invariance lift-off. However, this conductivity invariance lift-off is fixed for a particular sensor setup, which is not convenient for various sample conditions. In this paper, we propose using two parameters in the coil design – the horizontal and vertical distances between the transmitter and the receiver to control the conductivity invariance lift-off. The relationship between these two parameters and the conductivity invariance lift-off is investigated by simulation and experiments and it has been found that there is an approximate linear relationship between these two parameters and the conductivity invariance lift-off. This is useful for applications where the measurements have restrictions on lift-off, e.g. uneven coating thickness which limits the range of the lift-off of probe during the measurements. Therefore, based on this relationship, it can be easier to adjust the configuration of the probe for a better inspection of the test samples.</p>

scholarly journals Hubungan Kepercayaan Diri Siswa dengan Pemahaman Konsep Matematis Siswa Kelas XI MIA 1 SMAN 3 Lubuk Basung Kabupaten Agam

Horizon ◽  
2021 ◽  
Vol 1 (4) ◽  
pp. 698-711
Author(s):  
Vuve Ona Rahma Suci ◽  
Melisa .Melisa ◽  
Hamdunah .Hamdunah
Keyword(s):  
Data Analysis ◽  
Linear Relationship ◽  
Regression Coefficient ◽  
Linear Regression Analysis ◽  
Positive Influence ◽  
Mathematical Concepts ◽  
Self Confidence ◽  
Analysis Technique ◽  
The Relationship ◽  
Positive Effect

The ability to understand concepts is one of the goals of mathematical ability. One of the factors for the lack of ability to understand concepts is self-confidence. This study aims to determine the relationship between students' self-confidence and understanding of mathematical concepts in class XI MIA SMAN 3 Lubuk Basung Kabupaten Agam.This study uses inferential research where inferential research is a study that tests a hypothesis, and relates one variable to another with quantitative analysis. The subjects of this study were students of class XI MIA 1 SMAN 3 Lubuk Basung. The research instrument used was a self-confidence questionnaire and a test for understanding mathematical concepts. The data analysis technique used is simple linear regression analysis and product moment correlation.Based on data analysis, the regression coefficient of the questionnaire score (b) is with a significant level of 0.05 because the regression coefficient (b) is positive, so there is a positive effect of X on Y. It means that the bigger X, the bigger Y on average. The close linear relationship between X and Y can be seen from the correlation coefficient r = where r approaches 1, then a positive linear relationship between X and Y so that it can be concluded that the bigger X, the greater Y and self-confidence has a positive influence on the ability to understand concepts of class XI students. MIA 1 SMAN 3 Lubuk Basung Kabupaten Agam.

scholarly journals Welfare and the depth of informality: Evidence from five African countries

2021 ◽  
Author(s):  
Eva-Maria Egger ◽  
Cecilia Poggi ◽  
Héctor Rufrancos
Keyword(s):  
Panel Data ◽  
Linear Relationship ◽  
Social Insurance ◽  
Household Head ◽  
African Countries ◽  
Cross Sectional ◽  
Hours Worked ◽  
Household Level ◽  
Sub Saharan ◽  
The Relationship

This study explores the relationship between household poverty and depth of informality by proposing a new measure of informality at the household level. It is defined as the share of activities (hours worked or income earned) without social insurance for wage workers in the household. We apply cross-sectional regressions to five urban sub-Saharan African countries, showing that a household head informality dummy obscures a non-linear relationship between the depth of household informality and welfare outcomes. In some countries, a small share of income from formal jobs is associated with at least the same welfare as a fully formal portfolio. By assessing transitions between household portfolios with panel data for urban Nigeria, we also show that most welfare differences are explained by selection and that movements in and out of formality cannot sufficiently change welfare trajectories. The results call for better inclusion of informal profiles to social insurance programmes.

scholarly journals Weather Prediction using Advanced Machine Learning Techniques

2021 ◽  
Vol 2089 (1) ◽  
pp. 012059
Author(s):  
G. Hemalatha ◽  
K. Srinivasa Rao ◽  
D. Arun Kumar
Keyword(s):  
Linear Relationship ◽  
Weather Prediction ◽  
Weather Condition ◽  
Weather Conditions ◽  
Machine Learning Techniques ◽  
Weather Data ◽  
Learning Techniques ◽  
Proposed Model ◽  
Non Linear ◽  
The Relationship

Abstract Prediction of weather condition is important to take efficient decisions. In general, the relationship between the input weather parameters and the output weather condition is non linear and predicting the weather conditions in non linear relationship posses challenging task. The traditional methods of weather prediction sometimes deviate in predicting the weather conditions due to non linear relationship between the input features and output condition. Motivated with this factor, we propose a neural networks based model for weather prediction. The superiority of the proposed model is tested with the weather data collected from Indian metrological Department (IMD). The performance of model is tested with various metrics..

scholarly journals Government Size and Corruption: A Non-linear Analysis in the Case of EMCCA

2021 ◽  
Vol 12 (4) ◽  
pp. 17
Author(s):  
Assoumou Ondo ◽  
Beau Jency Owono Ondo
Keyword(s):  
Linear Relationship ◽  
Central Government ◽  
Central Africa ◽  
Linear Analysis ◽  
Government Size ◽  
Economic Community ◽  
Non Linear ◽  
The Government ◽  
The Impact ◽  
The Relationship

This article analyzes the relationship between Government size and corruption. Unlike the works in the way which suppose a linear relationship between the two variables, we estimate a panel with change of the modes to characterize the impact of the size of the Central Government on corruption, in the countries of the economic community and monetary of Central Africa (EMCCA). The results show that there is a non-linear relationship between these two variables. Indeed, a strong involvement of the Government in economic activity results in a significant increase in corruption when the Government exceeds a size of 13.5508% of the GDP.

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