Nirmal Raj Joshi
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Monte Carlo simulation to find value of PI
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in MathematicsInception While reading “Fooled by Randomness” by Nassim Nicholas Taleb, I came across a chapter discussing Monte Carlo theory. The author claimed that when bullets are fired inside a square and a circle is inscribed within it, the ratio of bullets inside the circle to the total number of bullets approximates a ratio involving π.…
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Impact of bad formwork of concrete in its service life
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in EngineeringFormwork plays a vital role in reinforced concrete (RC) design, providing support for the concrete until it gains adequate strength. Its complexity can range from simple cubic boxes to intricate spline surfaces. While formwork design is a specialized area of concrete engineering, this article focuses on how poor formwork affects the service life of RC…
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Derivation of combined angle- Version 2
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In this post, I will show how to calculate the combined 3d angle. Such situation arises while designing a rigid 3d joints such as a pipeline. The coordinate-based approach can be employed to determine the actual deflection angle between two lines in 3D space. This method not only calculates the deflection angle, but also accurately…
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Pull out test in concrete
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The bond between concrete and steel is a crucial factor in structural integrity. As concrete ages, this bond often weakens. This article outlines the procedure for conducting a pull-out test to evaluate bond strength. In tests with plain rebars, the maximum load typically coincides with the moment of initial slip. In contrast, deformed bars can…
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Bonding behaviour in ASR affected concrete
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in EngineeringAlkali Silica Reaction (ASR) has been found to deteriorate the bond between steel and concrete. This article will discuss if this is true. What is Alkali Silica Reaction? The Alkali Silica Reaction (ASR) is a chemical reaction that occurs between alkaline substances in cement and reactive silica found in some aggregates used in concrete. When…
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Zotero settings for single pdf folder
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What is zotero? Zotero is a free, open-source reference management software that helps users collect, organize, cite, and share research materials. It allows you to save references from web pages, academic articles, and other sources directly into your library. Understanding zotero file collection. To have a smooth performance, here is the recommended settings. The item…
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Showing excel formula as text and evaluating text as formula
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Evaluating text as a formula Excel does not have an inbuilt function to evaluate texts written in cells as formulas. Such cases arise, for example, when you want to show the calculation steps and not only the final answer. This issue can be solved by using a VBA function, as shown below. The function takes…
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Solar system simulation: Exploring planetary motion
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in How toThis realistic solar system animation captures the axial rotation, orbital inclination, and time periods of all the planets. It features two viewports: the left displays all the planets, while the right viewport follows the selected planet with a dedicated camera. The green plane represents the orbital plane of Earth and the Sun, helping to illustrate…
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Catchment calculation in QGIS
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in How toCalculating a catchment area involves using DEM files to analyze terrain and hydrology. By reprojecting the DEM, filling data inconsistencies, and applying Strahler order analysis, users can delineate the catchment effectively. This process is essential for understanding water flow and managing resources within a specific geographic area.
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Changing voice with a free software
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in TechnologyHave you ever paused to wonder what our human voices are really composed of? Is it possible changing voice from one person to another? Beyond just the words we speak, each voice is a symphony of intricate elements working together. From the pitch that conveys emotion, to the unique timbre that makes each voice distinct,…