A few years ago, Cornman found a way around the problem. In the U.S., commercial flights served by air-traffic control—some twenty-seven thousand a day—are required to transmit their position, altitude, and velocity. By tracking those transmissions and the planes’ motions over time, a new program that Cornman developed at NCAR can create a moment-by-moment snapshot of turbulence as it’s happening. The F.A.A. is planning to test the program this year. Together with NCAR’s earlier software, Sharman’s forecasting models, and data from radar arrays on the ground, this system could start to give pilots the advance warning they need. “That is the future for me,” Cornman said. “All these operations get integrated in a seamless network. The pilots don’t have to talk to air-traffic control and say, ‘Should I go up or down?’ They just get a display with a color-coded flight track on it. And they see that it looks better a few thousand feet up.”
当统治的维系愈发依赖强力控制与小圈子的利益分配,而非认同与共识,伊朗政权便逐渐褪去其革命理想的外衣,成为一个以维护既得利益为根本逻辑的共同体。这不仅导致民众,甚至其支持群体也不断丧失对伊朗政权的认同感,还导致国家彻底被既得利益群体绑架,任何旨在变革、影响既得利益的政策都寸步难行。
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第十五条 除合同另有约定外,抵押人应当对抵押船舶进行保险;未保险的,抵押权人有权对该船舶进行保险,保险费由抵押人负担。