Abstract:
A cleaning device includes an inhalation unit to generate inhalation force to inhale air into a main body, the inhalation unit comprising: an impeller that is rotatable; an impeller cover having an inlet damper formed therein; and a return channel that is coupled to the impeller cover so that the impeller is capable of being accommodated in the return channel and that is directly coupled to the impeller so that air passing through the impeller is capable of being introduced into the return channel, the return channel comprising: an inner frame; and an outer frame at an outer side of the inner frame so as to be spaced apart from the inner frame.
Abstract:
A case for an electronic device includes a fastening part attachable and detachable to and from at least part of the electronic device, a cover that covers a first surface of the electronic device that faces a first direction, with the cover in a closed state, and a connecting part that connects the fastening part and the cover. The cover includes a base plate and a soft material part disposed in a second direction from the base plate, with the cover in the closed state, the second direction being opposite to the first direction, wherein at least a portion of the soft material part makes contact with the first surface of the electronic device.
Abstract:
A method and apparatus for controlling writing of data in a storage unit based on a NAND flash memory are provided. The method includes determining reference values for classifying dirty pages to be written in the storage unit into a plurality of groups; calculating, with respect to each of the dirty pages, a hotness indicating a possibility of a change of data; classifying the dirty pages into the groups corresponding to reference values most similar to the calculated hotness; determining whether sizes of the groups are greater than a size of a segment, where the segment is a unit for performing a write request in the storage unit; and requesting a write operation for each segment with respect to groups having a size at least equal to the size of the segment to the storage unit.