Eight queens problem is a classic puzzle in which the goal is to place eight chess queens on an 8x8 chessboard in such a way that no two queens threaten each other. In other words, no two queens can ...

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The megalithic site of Gunung Padang in the highlands of western Java was constructed some 2,000 years ago over the course of several generations. Similar stone monuments are found across the ...

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Solution-state nuclear magnetic resonance (NMR) spectroscopy is the classical NMR spectroscopy approach used for molecular structure determination, where the experimental sample is studied while in ...