This paper proposes a novel and statistical method of ability estimation based on acquisition distribution for a personalized computer aided question generation. This method captures the learning outcomes over time and provides a flexible measurement based on the acquisition distributions instead of precalibration. Compared to the previous studies, the proposed method is robust, especially when an ability of a student is unknown. The results from the empirical data show that the estimated abilities match the actual abilities of learners, and the pretest and post-test of the experimental group show significant improvement. These results suggest that this method can serves as the ability estimation for a personalized computer-aided testing environment.

UPS has also been testing drones for delivery, like this one on Children's Island in Marblehead, Mass. Tuesday, Orange Leaf Frozen Yogurt made its first frozen yogurt delivery to Hope College in Michigan, possibly the first drone delivery of frozen yogurt in the world. Taking froyo to new heights today... Stay tuned! The drone, which can reach speeds up to 30 miles-per-hour and carry up to 30 pounds, took 15 minutes to travel nearly a mile to the campus, WOOD TV8 reports. There, the company threw a party to celebrate the delivery.