Abstract: A digital forensic audit system which extracts the event and the document file from the image, analyzes the event and the document file to visualize the event and document file in order to analyze a user's behaviors by scanning a usage trace and a file which is an image recorded in a window system, the system includes a document file extracting unit which extracts a logical level document file and an attribute of the document file from the image; an event extracting unit which extracts an event including time of occurrence from the image and extracts an event from an attribute of the document file related to the time (hereinafter, referred to as a time attribute), an analyzing unit which analyzes the document file or the event by the attribute and the time; and a visualizing unit which displays the analyzed result (hereinafter, referred to as an analysis result) on a time coordinate.

Abstract: A device for reducing pressure loss of a cyclone dust collector is disclosed, in which a turbulence flow generated when inlet air into a cyclone body is discharged out through an air outlet passage can be laminated. The device for reducing pressure loss of a cyclone dust collector prevents fine dust as well as relatively weight dust from being contained in discharge air.

Abstract: A cyclone collector for a vacuum cleaner is disclosed. The cyclone collector comprises a cylindrical cyclone body, an air inlet connected in the middle of an outer circumference of the cyclone body in a tangential direction, dust outlets connected to both ends of the outer circumference of the cyclone body in a tangential direction, a dust box in communication with the dust outlets for collecting dust coming through the dust outlets, a pair of air outlet tubes for discharging an air inside of the cyclone body, and a guide piece provided in the middle of an inside surface of the cyclone body for smoothly dividing and guiding the air drawn through the air inlet to the air outlet tubes, respectively.