Abstract: A mobility movement information acquiring method has: acquiring an observed velocity value of a mobility according to a first interval; storing the observed velocity value and corresponding time information so as to relate each other; and acquiring an acceleration value in a travelling direction by inputting the observed velocity value into a state-space model in which: displacement per unit time of a state velocity value is the acceleration value in the travelling direction, the observed velocity value is a sum of the state velocity value and a value following a first distribution, and displacement per the unit time of the acceleration value in the travelling direction follows a second distribution.

Abstract: According to one embodiment, a memory system includes: a memory device; and a controller connectable to a host and configured to control the memory device in accordance with a firmware. The controller is configured to: receive a first command relating to the controlling of the memory device and a first file including a first flag from the host; execute a first sequence in accordance with a content of the first file; and after executing the first sequence, send a response including a notification of completion of the first sequence to the host. The first sequence includes: a first operation of executing update of the firmware when the first flag has a first value; and a second operation of sequentially executing second commands included in the first file when the first flag has a second value different from the first value.