Abstract: A method, implemented by a computer, for determining a position of a personal mobility device (PMD) comprises: estimating a position of a PMD based on a first wireless signal; determining whether the PMD is within an intermediate area between a first area and a second area, based on an estimated position of the PMD; determining whether the PMD moves to the second area, by using both the first wireless signal and a second wireless signal; and determining position of the PMD by using any one of the first wireless signal and the second wireless signal based on a movement of the PMD to the second area.

Abstract: An insulating wall fixing device for liquefied natural gas storage tanks includes: a base socket; and a securing stud inserted into the base socket. The base socket is formed on an upper surface thereof with an insertion hole through which the securing stud is inserted into the base socket and has an interior space in which one end of the securing stud is settled. The securing stud includes an insertion portion inserted into the interior space of the base socket through the insertion hole and a fastening portion protruding from the insertion portion outwardly of the base socket. The insertion portion includes a spherical shape and multiple leg members divided by a groove formed from one end of the insertion portion to the other end of the insertion portion. The multiple leg members of the insertion portion are retracted toward the groove.

Abstract: The present invention provides a transfer unit having a transfer rotor and a food waste treatment apparatus using the transfer unit. The transfer unit includes the transfer rotor, a housing and a sieve. The transfer rotor includes a rotor body, and at least one blade provided on the circumferential outer surface of the rotor body. The housing has a hollow container shape and contains the transfer rotor therein such that the transfer rotor is rotatable without interference from the housing. The housing is inclined at a predetermined angle with respect to the horizontal plane. The sieve is provided in the housing to guide discharge of sewage from food waste. The sieve is disposed in the lower portion of the housing to drain the sewage generated from the food waste to the outside of the housing.

Abstract: The present invention provides a transfer unit having a transfer rotor and a food waste treatment apparatus using the transfer unit. The transfer unit includes the transfer rotor, a housing and a sieve. The transfer rotor includes a rotor body, and at least one blade provided on the circumferential outer surface of the rotor body. The housing has a hollow container shape and contains the transfer rotor therein such that the transfer rotor is rotatable without interference from the housing. The housing is inclined at a predetermined angle with respect to the horizontal plane. The sieve is provided in the housing to guide discharge of sewage from food waste. The sieve is disposed in the lower portion of the housing to drain the sewage generated from the food waste to the outside of the housing.