New Delhi, Dec. 6 -- Delhi University (DU) must "change its culture" regarding guest and ad-hoc teachers, vice-chancellor Yogesh Singh said on Friday during the academic council (AC) meeting, stressing the need for permanent appointments. Singh said the university should move away from its dependence on temporary faculty. "We want to change the culture of DU. Permanent appointments should be made instead of temporary ones," he said during the zero hour. "Academic appointments should be made twice a year," Singh said, addressing the long-standing concern of professors regarding increasing reliance on guest teachers. According to an official statement, Singh also urged colleges to appoint sports coaches and advised institutions facing infrast...