Abstract: A legitimacy management system or the like is provided, configured to be suitable for managing history information with legitimacy ensured giving consideration to security. A legitimacy management system 1 includes a user device 3, distribution device 5, and exchange apparatus 7. A splitting engine and combining engine are separately managed by user device 3 and exchange apparatus 7, respectively. User device 3 includes a splitting unit 21. Exchange apparatus 7 includes a combining unit 51. User device 3 instructs splitting unit 21 to split history information into multiple split files, and distributes the split files to user device 3 and the distribution device 5. When the history information is updated, user device 3 issues a request to exchange apparatus 7. In this case, combining unit 51 of exchange apparatus 7 combines the split files to acquire a combined file, and sends the combined file to user device 3.

Abstract: By introducing inequality to the information dispersal/sharing storage method, a ciphertext management method or the like is provided to support novel ciphertext data management. After the ciphertext and key data are each divided, pairs of the divided ciphertext and key data are generated. Specifically, they are one-to-one paired as with conventional techniques. Furthermore, additional one-to-many pairs are generated. The generated one-to-one pairs provide equality as with conventional techniques. When the number of the one-to-one pairs of the divided ciphertext and key data that can be used is equal to or greater than a threshold number, both the ciphertext data and the key data can be reconstructed, and accordingly, the secret data can be decoded. In contrast, even when the one-to-many pairs that can be used is equal to or greater than a threshold number, the ciphertext data and/or the key data cannot be reconstructed. This provides inequality.

Abstract: A liquid ejection module includes a pressure chamber, a supply flow channel that supplies a liquid to the pressure chamber, a collection flow channel that collects the liquid from the pressure chamber, a liquid feeding chamber connected to one of the supply flow channel and the collection flow channel, and a connection flow channel connecting the liquid feeding chamber to the other of the supply flow channel and the collection flow channel. The liquid feeding chamber includes a liquid feeding mechanism that circulates the liquid in the supply flow channel, the pressure chamber, the collection flow channel, the liquid feeding chamber, and the connection flow channel. A ratio of a sum of flow channel resistance of the supply flow channel, the pressure chamber, and the collection flow channel relative to flow channel resistance of the connection flow channel is equal to or above 0.5.

Abstract: An optical transmitter includes: a semiconductor laser unit that outputs laser light of first output power and outputs a monitor current; a casing of an optical module that holds optical fiber; a monitor current detection unit that generates a monitor voltage; a laser driving unit that controls a laser driving current; a storage unit that stores information based on a result of a measurement of a ratio of second output power with respect to the first output power; a target voltage determination unit that changes the target voltage based on a detected temperature of a temperature sensor and the information based on the result of the measurement; and a power monitor value determination unit that generates a power monitor value indicating the second output power to be transmitted to a host device using the detected temperature and the information based on the result of the measurement.

Abstract: An optical transmitter includes: a semiconductor laser unit that outputs laser light of first output power and outputs a monitor current; a casing of an optical module that holds optical fiber; a monitor current detection unit that generates a monitor voltage; a laser driving unit that controls a laser driving current; a storage unit that stores information based on a result of a measurement of a ratio of second output power with respect to the first output power; a target voltage determination unit that changes the target voltage based on a detected temperature of a temperature sensor and the information based on the result of the measurement; and a power monitor value determination unit that generates a power monitor value indicating the second output power to be transmitted to a host device using the detected temperature and the information based on the result of the measurement.

Abstract: An optical transceiver includes an optical component (3) whose ground is integrated with a signal ground. The optical transceiver includes a conductor (51) that is electrically connected to the optical component (3), and a sheet-like insulator (52) disposed between the conductor (51) and a housing (1) such that a main surface thereof is positioned along an inner wall of the housing (1), and separating the signal ground and a frame ground on the side of the housing (1) from each other.

Abstract: Provided is a technology that realizes a variable shape mirror using an actuator having a comb electrode structure, which can be relatively easily manufactured and displaced in two (±) directions perpendicular to a mirror reference plane. A variable shape mirror (100) includes: a mirror base (111) including a reflective surface (110); and an actuator (101) including a first actuator and a second actuator. Each of the plurality of actuators is connected to the mirror base via a connecting portion (121). The first actuator has a first electrode pair (104, 105) of a comb electrode structure for displacing the connecting portion in a first direction perpendicular to the reflective surface. The second actuator has a second electrode pair (108, 109) of a comb electrode structure for displacing the connecting portion in a second direction opposite to the first direction, the second electrode pair being separately formed from the first electrode pair.

Abstract: By introducing inequality to the information dispersal/sharing storage method, a ciphertext management method or the like is provided to support novel ciphertext data management. After the ciphertext and key data are each divided, pairs of the divided ciphertext and key data are generated. Specifically, they are one-to-one paired as with conventional techniques. Furthermore, additional one-to-many pairs are generated. The generated one-to-one pairs provide equality as with conventional techniques. When the number of the one-to-one pairs of the divided ciphertext and key data that can be used is equal to or greater than a threshold number, both the ciphertext data and the key data can be reconstructed, and accordingly, the secret data can be decoded. In contrast, even when the one-to-many pairs that can be used is equal to or greater than a threshold number, the ciphertext data and/or the key data cannot be reconstructed. This provides inequality.

Abstract: An optical transceiver includes an optical component (3) whose ground is integrated with a signal ground. The optical transceiver includes a conductor (51) that is electrically connected to the optical component (3), and a sheet-like insulator (52) disposed between the conductor (51) and a housing (1) such that a main surface thereof is positioned along an inner wall of the housing (1), and separating the signal ground and a frame ground on the side of the housing (1) from each other.

Abstract: There is provided a liquid ejection device including a head for ejecting a liquid, a liquid containing unit, a liquid filler, and a pressure adjusting unit, in which the liquid containing unit includes a sealed housing and a flexible member provided in the housing, the housing includes a first containing space communicating with the head and a second containing space partitioned from the first containing space through use of the flexible member, the first containing space contains the liquid, and the liquid filler is filled into the second containing space, the pressure adjusting unit communicates with the second containing space, and adjusts the pressure of the liquid filler filled into the second containing space so as to maintain a negative pressure with respect to the head.

Abstract: There is provided a liquid ejection device including a head for ejecting a liquid, a liquid containing unit, a liquid filler, and a pressure adjusting unit, in which the liquid containing unit includes a sealed housing and a flexible member provided in the housing, the housing includes a first containing space communicating with the head and a second containing space partitioned from the first containing space through use of the flexible member, the first containing space contains the liquid, and the liquid filler is filled into the second containing space, the pressure adjusting unit communicates with the second containing space, and adjusts the pressure of the liquid filler filled into the second containing space so as to maintain a negative pressure with respect to the head.

Abstract: Provided is an actuator formed in a substrate including a handle layer, an elastic body layer, and an insulating layer, the actuator including a movable portion supported to a support portion by an elastic body, a movable comb electrode formed on the movable portion, a fixed comb electrode supported by the support portion, and electrode wirings connected to the respective comb electrodes in which the elastic body supports the movable portion such that the movable portion is displaceable in a direction perpendicular to the substrate in accordance with voltages applied to the comb electrodes; the comb electrodes are made up of the handle layer, and the elastic body is made up of the elastic body layer; and a handle layer separation groove is provided to electrically separate between the handle layers of the support portions supporting the comb electrodes, and a structure reinforcing portion is formed across the separation groove.

Abstract: There is provided a liquid ejection device including a head for ejecting a liquid, a liquid containing unit, a liquid filler, and a pressure adjusting unit, in which the liquid containing unit includes a sealed housing and a flexible member provided in the housing, the housing includes a first containing space communicating with the head and a second containing space partitioned from the first containing space through use of the flexible member, the first containing space contains the liquid, and the liquid filler is filled into the second containing space, the pressure adjusting unit communicates with the second containing space, and adjusts the pressure of the liquid filler filled into the second containing space so as to maintain a negative pressure with respect to the head.

Abstract: The invention provides a liquid ejection head including a substrate provided with an energy-generating element for generating energy utilized for ejecting a liquid; and a nozzle plate provided with an ejection orifice from which the liquid is ejected as a droplet and an opening from which a static-removable gas for electrically neutralizing the droplet is jetted, the nozzle plate being joined to the substrate.

Abstract: Provided is a technology that realizes a variable shape mirror using an actuator having a comb electrode structure, which can be relatively easily manufactured and displaced in two (±) directions perpendicular to a mirror reference plane. A variable shape mirror (100) includes: a mirror base (111) including a reflective surface (110); and an actuator (101) including a first actuator and a second actuator. Each of the plurality of actuators is connected to the mirror base via a connecting portion (121). The first actuator has a first electrode pair (104, 105) of a comb electrode structure for displacing the connecting portion in a first direction perpendicular to the reflective surface. The second actuator has a second electrode pair (108, 109) of a comb electrode structure for displacing the connecting portion in a second direction opposite to the first direction, the second electrode pair being separately formed from the first electrode pair.

Abstract: There is provided a liquid ejection device including a head for ejecting a liquid, a liquid containing unit, a liquid filler, and a pressure adjusting unit, in which the liquid containing unit includes a sealed housing and a flexible member provided in the housing, the housing includes a first containing space communicating with the head and a second containing space partitioned from the first containing space through use of the flexible member, the first containing space contains the liquid, and the liquid filler is filled into the second containing space, the pressure adjusting unit communicates with the second containing space, and adjusts the pressure of the liquid filler filled into the second containing space so as to maintain a negative pressure with respect to the head.

Abstract: Provided is an actuator formed in a substrate including a handle layer, an elastic body layer, and an insulating layer, the actuator including a movable portion supported to a support portion by an elastic body, a movable comb electrode formed on the movable portion, a fixed comb electrode supported by the support portion, and electrode wirings connected to the respective comb electrodes in which the elastic body supports the movable portion such that the movable portion is displaceable in a direction perpendicular to the substrate in accordance with voltages applied to the comb electrodes; the comb electrodes are made up of the handle layer, and the elastic body is made up of the elastic body layer; and a handle layer separation groove is provided to electrically separate between the handle layers of the support portions supporting the comb electrodes, and a structure reinforcing portion is formed across the separation groove.

Abstract: Provided is an actuator formed in a substrate including a handle layer, an elastic body layer, and an insulating layer, the actuator including a movable portion supported to a support portion by an elastic body, a movable comb electrode formed on the movable portion, a fixed comb electrode supported by the support portion, and electrode wirings connected to the respective comb electrodes in which the elastic body supports the movable portion such that the movable portion is displaceable in a direction perpendicular to the substrate in accordance with voltages applied to the comb electrodes; the comb electrodes are made up of the handle layer, and the elastic body is made up of the elastic body layer; and a handle layer separation groove is provided to electrically separate between the handle layers of the support portions supporting the comb electrodes, and a structure reinforcing portion is formed across the separation groove.

Abstract: The invention provides a liquid ejection head including a substrate provided with an energy-generating element for generating energy utilized for ejecting a liquid; and a nozzle plate provided with an ejection orifice from which the liquid is ejected as a droplet and an opening from which a static-removable gas for electrically neutralizing the droplet is jetted, the nozzle plate being joined to the substrate.

Abstract: Provided is an actuator formed in a substrate including a handle layer, an elastic body layer, and an insulating layer, the actuator including a movable portion supported to a support portion by an elastic body, a movable comb electrode formed on the movable portion, a fixed comb electrode supported by the support portion, and electrode wirings connected to the respective comb electrodes in which the elastic body supports the movable portion such that the movable portion is displaceable in a direction perpendicular to the substrate in accordance with voltages applied to the comb electrodes; the comb electrodes are made up of the handle layer, and the elastic body is made up of the elastic body layer; and a handle layer separation groove is provided to electrically separate between the handle layers of the support portions supporting the comb electrodes, and a structure reinforcing portion is formed across the separation groove.