Nirmal Raj Joshi
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Impact of finite element analysis
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in EngineeringFinite 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?
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in BiologyWe 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
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in ScienceIn 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)
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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
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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…
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Centroid of trapezoidal shape
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in How toThe centroid of the trapezoidal with its one face perpendicular is given be $$ X=-1/3* {(-2b^2-2*a*b+a^2)/(a+b)}$$ $$Y=1/3 *h* (b+2*a)/(a+b)$$ Where a, b, h and origin is as shown in the figure below. Similarly, the centroid of any trapezoidal that does not have perpendicular face is given by $$x= 1/3*(3a*b+3*b*c+b^2+6*a*c+3*a^2+2*c^2)/(b+2a+c)$$ $$y=1/3* h* (b+3*a+c)/(b+2*a+c)$$ Where a, b…
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Common problems in Autocad and their solution – a historical database
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in How toI am listing a set of AutoCAD commands and system variable which just offends the regular users. Use F1 in the AutoCAD for details. Problem: Land Desktop import slope lines in plan view Solution: To import end lines (lines meeting to ground in fill or cut): Cross section->Point Output->Catch Pt to DWG-> Yes ->…
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Durability of concrete in terms of water permeability
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Permeability is one of the main indicator defining the durability of the concrete. In one hand, the permeability of the concrete can be high from the beginning of concrete life, in which case, the deterioration takes place rapidly during the service life. While in the other hand, the permeability of the concrete may gradually increase…
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Degradation of concrete by abrasion
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in EngineeringAbrasion of concrete is progressive loss of concrete mass due to mechanical degradation such as friction, grinding action, impact, overloading and local crushing. Vehicular movement and pedestrian traffic causes abrasion. The worst effect of abrasion is caused by vehicle with studded/chain tyres. Similarly, in industrial buildings, the concrete floors are subjected to impact load and…