Nirmal Raj Joshi
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History hydroelectricity in the Philippines
The Philippines, an archipelago blessed with abundant water resources, has relied on hydroelectricity as a major source of renewable energy for over a century. From its early beginnings during the American colonial period to its current role in the nation’s sustainable energy strategy, hydroelectric power has significantly shaped the country’s economic and industrial development. However,…
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Early days of FEA
During the 1940s, the world was embroiled in World War II, and the demands for more advanced and efficient aircraft surged. Aircraft engineering faced challenges due to the increasing complexity of designs, as manufacturers aimed to build planes that were lighter, faster, and more durable. This pressure led to the development and early application of…
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Cavitation effect in concrete
Cavitation is a physical process that leads to surface pitting caused by the collapse of vapour bubbles, which results in a sudden rise in local pressure. In this article, we explore how this phenomenon can damage concrete. Damages by cavitation Cavitation can damage the concrete in the following ways: Shock Waves Generated by Bubble Implosion:…
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Science of engineering tapes
When one thinks about tapes, one might imagine a simple roll of something sticky. But dive into the aisles of a hardware store, and you’ll find a world of tapes with unique powers—some strong enough to fix a broken car bumper, others designed to hold up in the rain, and some even with colours and…
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Impact of finite element analysis
Finite Element Analysis (FEA) has become a cornerstone in modern engineering, evolving from its humble origins into an advanced computational technique that touches virtually every aspect of structural, mechanical, and material engineering. Its development traces back to the mid-20th century, born out of the need for more accurate solutions to complex engineering problems that could…
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Biorhythm in humans : myth or reality?
We all feel high and low with time. Sometimes we are fastest, strongest, and healthy. And at other times, we are in the opposite mood. This is biorhythm. The equations used to calculate it are given on Wikipedia. Biorhythm theory suggests that our physical, emotional, and intellectual states follow natural, cyclical patterns, which influence how…
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Perception and reality
In their 2010 article, Stephen Hawking and Leonard Mlodinow raise a fascinating philosophical question inspired by a city council decision in Monza, Italy. The council banned the use of curved fishbowls, arguing that they distorted a fish’s view of reality, which they considered cruel. This seemingly small ordinance serves as a springboard for a larger…
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The driver may be corrupted or missing. (Error Code 39)
My usb suddenly died. For a week I was in mess. I couldn’t connect my pendrive or any other instrument that were using usb for connections. At first i thought it was a hardware problem. But damn it was a minor problem in registry. The error code gets displayed in the device manager showing exclamation…
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Most efficient trapezoidal section for flow propagation
Calculating the most efficient trapezoidal section of a canal is crucial for optimizing water flow and minimizing the construction cost. A trapezoidal canal section, characterized by its trapezoidal shape, allows for controlled flow and effective sediment transport. The most efficient trapezoidal section of canal can be calculated as follows Let, Base width of the canal=B…