Abstract: A controller for a refrigerator for an entrance gate according to an embodiment of the present invention is configured to: register a user authentication means through a user authentication method setting process; and to open an outer door only when user authentication has succeeded, if an article delivery command is input, thereby preventing theft of the article.

Abstract: The present invention relates to a front door refrigerator for enabling a delivery man to safely deliver delivery goods to an orderer even when a user having ordered an item or fresh food is not at home, and preventing the delivery goods from becoming lost during delivery.

Abstract: A smart tablet-based neurofeedback device combined with cognitive training, a method and a computer readable medium thereof are provided. The neurofeedback combined with cognitive training method includes: receiving a measured beta wave; executing an application for attention training set to a first level; performing a predetermined operation associated with an accomplishment condition of the first level when a value of the received beta wave is larger than a predetermined reference value; and executing a second level including an added accomplishment condition for attention training when the accomplishment condition of the first level is satisfied.