Abstract: Provided are an acoustic matching sheet containing the following component (B) in the following component (A), a composition for an acoustic matching layer, an acoustic wave probe, an acoustic wave measurement apparatus, and a method for manufacturing an acoustic wave probe. (A) is at least one of a resin or a rubber; and (B) is at least one of a resin particle or a rubber particle having an acoustic velocity lower than an acoustic velocity of the component (A) and having a number average particle diameter of 1.0 ?m or less.

Abstract: An unauthorized message in an in-vehicle network is more accurately detected. A detection device includes: a monitoring unit configured to monitor, as target messages, an authorized message being periodically transmitted and the unauthorized message in the in-vehicle network, and monitor a reference message being periodically transmitted; a calculation unit configured to, based on a monitoring result of the monitoring unit, calculate a time difference between a time corresponding to a transmission time of the target message and a time corresponding to a transmission time of the reference message; and a detection unit configured to, based on the time difference calculated by the calculation unit, perform a detection process of detecting the unauthorized message.

Abstract: A detection device includes: a monitoring unit configured to monitor, as target messages, an authorized message being periodically transmitted and the unauthorized message in the in-vehicle network; and a generation unit configured to generate a reference time to be used in a detection process of detecting the unauthorized message; a detection unit configured to perform detection process, based on time difference between a time corresponding to a transmission time of target message based on a monitoring result of the monitoring unit, and the reference time generated by the generation unit. When target message has been determined to be abnormal in the detection process, the generation unit, based on a value obtained by adding a latest statistical value to the reference time, generates a new reference time to be used in the detection process for a target message to be transmitted after the target message having been determined to be abnormal.

Abstract: A detection device includes: a message acquisition unit configured to acquire one or a plurality of transmission messages in the in-vehicle network; a data acquisition unit configured to acquire a set of a plurality of types of data that are included in the transmission messages and that correspond to the same time; a storage unit configured to store therein a detection condition being based on a plurality of the sets that respectively correspond to a plurality of times; a calculation unit configured to calculate an estimated error of the data of a type to be monitored in the set, based on the set and the detection condition; and a determination unit configured to determine whether or not the transmission message corresponding to the data of the type to be monitored is an unauthorized message, based on the estimated error and on an estimated error that was calculated in the past.

Abstract: A liquid ejection head that can suppress variation in the circulation flow rate or the pressure of the liquid among a plurality of pressure chambers and suppress a difference in temperature distribution between adjacent element substrates to suppress image unevenness includes a plurality of ejection modules including an element substrate in which a plurality of ejection orifices that eject a liquid are aligned in an array. In one ejection module of the ejection modules adjacent to each other, the liquid is supplied from one side of an ejection orifice array, and the liquid is collected from the other side of the ejection orifice array, and in the other ejection module of the ejection modules adjacent to each other, the liquid is supplied from the other side, and the liquid is collected from the one side.

Abstract: In a liquid ejection head in which ejection modules are arrayed on a flow path forming member, each ejection module includes a recording element substrate provided on a support member. The recording element substrate includes a liquid supply channel, a liquid collection channel, and ejection ports. The support member includes supply-side liquid communication ports communicating with the liquid supply channel and collection-side liquid communication ports communicating with the liquid collection channel. The supply-side liquid communication ports and the collection-side liquid communication ports are alternately provided along the direction in which the ejection modules are arrayed. The closest pair of liquid communication ports in the adjacent ends of two adjacent ejection modules are both supply-side or collection-side liquid communication ports.

Abstract: A recording apparatus includes: a liquid ejection head including a heating element, a first protection layer that blocks contact between the heating element and liquid, a second protection layer that covers at least a portion of the first protection layer to be heated by the heating element and that functions as a first electrode, a second electrode that is electrically connected to the first electrode through the liquid, an ejection port that ejects the liquid, and a temperature detection element that corresponds to the heating element, and a detection unit configured to detect a feature point in a temperature curve that indicates a relationship between time and temperature, in which a combination of a potential set for the first electrode and a potential set for the second electrode in a case where printing is performed varies from that in a case where the detection unit detects the feature point.

Abstract: An aspect of the present disclosure is a liquid ejection apparatus including: a liquid ejection head including a conversion element that generates energy required to eject liquid, a first protection layer that blocks contact between the conversion element and the liquid, a second protection layer that partially covers the first protection layer and functions as a first electrode, a second electrode that is electrically connected to the first electrode through the liquid, and an ejection port that ejects the liquid, and a control unit configured to control a potential difference between the first electrode and the second electrode in printing to a predetermined value by changing at least one of potentials of the first electrode and the second electrode. The control unit sets the potential difference based on at least one of a condition and a configuration of the liquid ejection head.

Abstract: A detection device includes: a monitoring unit configured to monitor, as target messages, an authorized message being periodically transmitted and the unauthorized message in the in-vehicle network; and a generation unit configured to generate a reference time to be used in a detection process of detecting the unauthorized message; a detection unit configured to perform detection process, based on time difference between a time corresponding to a transmission time of target message based on a monitoring result of the monitoring unit, and the reference time generated by the generation unit. When target message has been determined to be abnormal in the detection process, the generation unit, based on a value obtained by adding a latest statistical value to the reference time, generates a new reference time to be used in the detection process for a target message to be transmitted after the target message having been determined to be abnormal.

Abstract: An unauthorized message in an in-vehicle network is more accurately detected. A detection device includes: a monitoring unit configured to monitor, as target messages, an authorized message being periodically transmitted and the unauthorized message in the in-vehicle network, and monitor a reference message being periodically transmitted; a calculation unit configured to, based on a monitoring result of the monitoring unit, calculate a time difference between a time corresponding to a transmission time of the target message and a time corresponding to a transmission time of the reference message; and a detection unit configured to, based on the time difference calculated by the calculation unit, perform a detection process of detecting the unauthorized message.

Abstract: A detection device that detects unauthorized communication in an on-vehicle network mounted on a vehicle includes: a monitoring unit that monitors first information that indicates a state or control related to the vehicle and that is transmitted in the on-vehicle network; a prediction unit that predicts an occurrence of second information in the on-vehicle network that indicates the state or control related to the vehicle based on the first information monitored by the monitoring unit; and a determination unit that determines, in a case where the second information is transmitted in the on-vehicle network, whether or not the transmitted second information is unauthorized, based on a result of prediction performed by the prediction unit.

Abstract: This detection device detects an attack in an on-vehicle network that includes a bus in which a frame including identification information that allows recognition of at least one of a transmission source and a destination is transmitted. In the bus, a plurality of the frames including pieces of the identification information different from each other are transmitted. The detection device includes: a monitoring unit configured to monitor a communication error in the bus; an aggregation unit configured to aggregate a communication error occurrence state regarding each piece of the identification information on the basis of a monitoring result by the monitoring unit; and a detection unit configured to detect the attack on the basis of an aggregation result by the aggregation unit.

Abstract: Provided is a liquid ejection head that can suppress variation in the circulation flow rate or the pressure of the liquid among a plurality of pressure chambers and suppress a difference in temperature distribution between adjacent element substrates to suppress image unevenness. The liquid ejection head includes a plurality of ejection modules including an element substrate in which a plurality of ejection orifices that eject a liquid are aligned in an array. In one ejection module of the ejection modules adjacent to each other, the liquid is supplied from one side of an ejection orifice array, and the liquid is collected from the other side of the ejection orifice array, and in the other ejection module of the ejection modules adjacent to each other, the liquid is supplied from the other side, and the liquid is collected from the one side.

Abstract: In a liquid ejection head in which ejection modules are arrayed on a flow path forming member, each ejection module includes a recording element substrate provided on a support member. The recording element substrate includes a liquid supply channel, a liquid collection channel, and ejection ports. The support member includes supply-side liquid communication ports communicating with the liquid supply channel and collection-side liquid communication ports communicating with the liquid collection channel. The supply-side liquid communication ports and the collection-side liquid communication ports are alternately provided along the direction in which the ejection modules are arrayed. The closest pair of liquid communication ports in the adjacent ends of two adjacent ejection modules are both supply-side or collection-side liquid communication ports.

Abstract: A detection device is configured to detect an unauthorized message in an on-vehicle network including a plurality of on-vehicle devices. The detection device includes: a monitoring unit configured to monitor transmission messages in the on-vehicle network and configured to create first time series data being time series data of values of transmission intervals of the transmission messages in a first period and second time series data being time series data of values of transmission intervals of the transmission messages in a second period; a correlation calculation unit configured to calculate a correlation between the first time series data and the second time series data that have been created by the monitoring unit; and a detection unit configured to detect the unauthorized message on the basis of the correlation calculated by the correlation calculation unit.

Abstract: An abnormality in an on-vehicle network is accurately detected through a simple process. A detection device is configured to detect an abnormality in an on-vehicle network including a plurality of on-vehicle devices, and includes: a monitoring unit configured to monitor transmission messages in the on-vehicle network, and acquire a communication load in the on-vehicle network; an acquisition unit configured to acquire a history of a communication load in an on-vehicle network to which the detection device belongs, or another on-vehicle network; and a detection unit configured to detect an abnormality in the on-vehicle network, based on the history acquired by the acquisition unit and on the communication load acquired by the monitoring unit at a first timing after the history.

Abstract: A determination device acquires first data and a plurality of second data that are related to a state of a vehicle and comprises a plurality of trained neural networks that are so trained as to estimate assumption data corresponding to the first data if any one of the plurality of second data is input; and a determination unit that determines correctness of the first data based on the estimation data respectively estimated by the plurality of trained neural networks and the first data.

Abstract: An image forming apparatus 101 capable of performing printing with a high image quality, and a control method of the image forming apparatus 101 are provided. For this purpose, a threshold value Dt is preliminarily set that allows printing without occurrence of blur, for each of preliminarily set monitoring areas A. In the case where a print duty for each of the monitoring areas A has exceeded the threshold value Dt, an ejection frequency of ink and conveying speed of a print medium are reduced in association therebetween.

Abstract: This detection device detects an attack in an on-vehicle network that includes a bus in which a frame including identification information that allows recognition of at least one of a transmission source and a destination is transmitted. In the bus, a plurality of the frames including pieces of the identification information different from each other are transmitted. The detection device includes: a monitoring unit configured to monitor a communication error in the bus; an aggregation unit configured to aggregate a communication error occurrence state regarding each piece of the identification information on the basis of a monitoring result by the monitoring unit; and a detection unit configured to detect the attack on the basis of an aggregation result by the aggregation unit.

Abstract: Provided is a detecting device which detects an unauthorized message in a vehicle-mounted network including a plurality of vehicle-mounted devices and includes a monitoring unit that monitors a transmission message in the vehicle-mounted network, an acquisition unit that acquires a distribution of transmission intervals between the transmission messages, and a detecting unit that detects the unauthorized message on the basis of a monitoring result of the monitoring unit and the distribution acquired by the acquisition unit.