Despite the headline, this isn't really a story about superconductivity—at least not the superconductivity that people care about, the stuff that doesn't require exotic refrigeration to work. Instead, it's a story about how superconductivity can be used as a test of some of the weirder consequences of quantum mechanics, one that involves non-existent particles of light that still act as if they exist.
近日,东南大学博士生导师陈洪兵教授在小红书上说:自从博士扩招,博士由考试入学改为考核入学后,博士生源质量明显下降,博士们根本不读书,水平比硕士还差。所以近年来他都是劝退想读他的博士的考生们,先想清楚再读博,宁缺毋滥。混个博士学位一点用都没有,纯粹浪费教育资源!
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"transaction" terminal that we would now recognize as a credit card reader. It
工傷後,雇主不跟他續約,但他才剛還清債務,正要開始存錢,沒有離開台灣的理由。他因工傷紀錄使求職困難,輾轉15家仲介公司才重新找到工作。如今,他在一家拖鞋工廠任職,採按件計酬,每天工時長達15小時,月休僅有兩天。
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