Abstract: Provided is a device and a method that are capable of display control of image data, which is received through a communication unit, with a small delay. An image frame, and memory input time and transmission frame rate information that serve as metadata are stored in the memory storing the image frame. The display control unit selects the image that is output to the display unit on the basis of the elapsed time from the input time information. The waiting time, which is the elapsed time from the time of input, and the buffering time are compared with each other in each of the queues, and the image frame corresponding to the newest queue, which is a queue among the queues in which the waiting time exceeds the buffering time, is selected as the output image to the display unit.

Abstract: Provided is a device and a method that are capable of display control of image data, which is received through a communication unit, with a small delay. An image frame, and memory input time and transmission frame rate information that serve as metadata are stored in the memory storing the image frame. The display control unit selects the image that is output to the display unit on the basis of the elapsed time from the input time information. The waiting time, which is the elapsed time from the time of input, and the buffering time are compared with each other in each of the queues, and the image frame corresponding to the newest queue, which is a queue among the queues in which the waiting time exceeds the buffering time, is selected as the output image to the display unit. Furthermore, when there is a change in the transmission frame rate, the display rate of the display unit is changed in addition to the change in the transmission frame rate.

Abstract: An information processing apparatus includes a communication unit configured to receive, from a reproduction device that reproduces content recorded on a loaded recording medium, content forming information regarding the structure of the content; a degree-of-similarity calculation unit configured to compare the content forming information received by the communication unit with content forming information registered in advance for each package of an information recording medium in a predetermined database and calculate a degree of similarity between the content forming information received by the communication unit and the content forming information registered in advance in the database; and a package determination unit configured to determine the package of the information recording medium loaded into the reproduction device by using the degree of similarity calculated by the degree-of-similarity calculation unit.

Abstract: An information processing apparatus, that obtains pieces of content information relating to content recorded in an information recording medium, includes a content identifier generation unit configured to read a content certificate which is recorded in the recording medium and which corresponds to the content stored in the information recording medium, and generates a content identifier by combining hash values which correspond to the content and which are included in data stored in the content certificate, a data transmitting unit configured to transmit the content identifier generated using the content identifier generation unit to a content information provision server, a data receiving unit configured to receive, from the content information provision server, the pieces of content information relating to the content which is specified on the basis of the content identifier, and a data outputting unit configured to output the pieces of content information received using the data receiving unit.

Abstract: An information processing apparatus includes a communication unit configured to receive, from a reproduction device that reproduces content recorded on a loaded recording medium, content forming information regarding the structure of the content; a degree-of-similarity calculation unit configured to compare the content forming information received by the communication unit with content forming information registered in advance for each package of an information recording medium in a predetermined database and calculate a degree of similarity between the content forming information received by the communication unit and the content forming information registered in advance in the database; and a package determination unit configured to determine the package of the information recording medium loaded into the reproduction device by using the degree of similarity calculated by the degree-of-similarity calculation unit.

Abstract: N-Acetyl-.beta.-D-glucosamine derivatives represented by the formula ##STR1## wherein R.sup.1 denotes a substituted alkyl group of 1 to 4 carbon atoms having a hydroxyl group, carboxyl group, sulfonic acid group or phosphoric acid group, or an alkali metal salt thereof, or a substituted phenyl group having a hydroxyl group, carboxyl group, sulfonic acid group, phosphoric acid group or said substituted alkyl group, or an alkali metal salt thereof, and R.sup.2, R.sup.3 and R.sup.4 each independently denote a hydrogen atom, halogen atom or nitro group, a process for producing the same, reagents for determining N-acetyl-.beta.-D-glucosaminidase activity containing said derivatives as effective ingredients, and a method for determining N-acetyl-.beta.-D-glucosaminidase activity using said derivatives.

Abstract: Novel N-acetyl-.beta.-D-glucosamine derivatives represented by the following formula: ##STR1## wherein R represents a hydrogen atom or an acyl group; and X represents a nitrogen atom or an oxide of nitrogen, are disclosed. The glucosamine derivatives are useful for determination of N-acetyl-.beta.-D-glucosaminidase in body fluids as an index of renal diseases.

Abstract: A safe of the present invention is easily locked or unlocked by the rotational force of a drive motor in accordance with a signal input from the outside of the safe. A locking mechanism is provided within the door. A lock bar is provided with a lock bolt on one end thereof which protrudes from the door and effects locking engagement between the door and the safe body. At ordinary time, the lock bolt is urged to the locking engagement. The drive motor is controlled by a control circuit which receives a safe open/close command signal from the outside. A driving means is revolved by the drive motor and when it engages a drive arm provided on the lock bar, the driving means moves the lock bar against the urging force, thereby releasing the locking engagement of the lock bar.