Table of Contents
Laue Condition | X-Ray Scattering | Condensed Matter Physics
นอกจากการดูบทความนี้แล้ว คุณยังสามารถดูข้อมูลที่เป็นประโยชน์อื่นๆ อีกมากมายที่เราให้ไว้ที่นี่: ดูความรู้เพิ่มเติมที่นี่
In this video, we will explain the Laue condition, which is a more general form of the Bragg condition and describes how waves can scatter at a lattice.
References:
[1] Chaikin, Lubensky, \”Principles of Condensed Matter Physics\”, Cambridge University Press (1995).
[2] Hofmann, \”Solid State Physics\” WileyVCH, (2015).
Contents:
00:00 Introduction
00:10 Derivation
01:45 Connection to Bragg
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Drawing Lorenz Curve with Excel
Drawing Lorenz Curve with Excel
Excel: Lorenz Curve and Gini Coefficient – Full Tutorial
This video tutorial shows, how to draw the Lorenz Curve in Microsoft Excel and afterwards, it’s shown how to calculate the Gini Coefficient.
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0:12 Presenting the Lorenz/Gini Case
Our data set is 5 regions with population and income for each. If your data is in absolute numbers, you need to have them in %. We store the data in our Excel sheet.
0:45 Calculating the income to population share
We divide the percentage of income by the percentage of population. A high number means a high income per capita for that region and similarly a low number means a low income per capita for the region. Finally sort the data from the smallest to the biggest, giving us the poorest region first.
1:45 Calculating the cumulative population and income
Calculate the cumulative population and income.
2:29 Draw the Lorenz curve in Excel
Mark the data, click Scatter, click Scatter with Smooth Lines and Markers. This gives you the raw Lorenz curve.
2:41 Fine tuning our Lorenz curve
Fix the max of the axis. Have the units in 10% increments. Make a chart title. Give the Lorenz curve a name. Axis titles.
4:10 Make an equality curve
This is how the Lorenz curve looks like, if everyone had the same income (= the regions are all equal).
5:01 Calculating the Gini coefficient
The gini coefficient is a statistical measure, that represents the income inequality withing a group of people (e.g. a nation, a region etc.).
5:22 Calculating the area under the Lorenz curve
6:44 Calculating the area between the inequality curve and the Lorenz curve
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