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Nils Gustaf Dalén, a renowned Swedish physicist and engineer, made significant contributions to the fields of optics and automatic control systems. His expertise led to the development of the AGA cooker, a self-regulating stove that revolutionized household cooking. Dalén's devotion to lighthouse engineering earned him the Nobel Prize in Physics in 1912 for his automatic regulators used in conjunction with gas accumulators for illuminating lighthouses and buoys.