Abstract: A biological state estimation device that estimates a biological state based on at least an electrocardiographic feature amount and comprises an electrocardiographic waveform acquisition unit; an electrocardiographic feature amount extraction unit, a pulse waveform acquisition unit; a pulse wave feature amount extraction unit an electrocardiographic waveform quality determination unit; a first search reference point setting unit for setting a first reference point for searching the electrocardiographic waveform when the electrocardiographic waveform is of quality to enable extraction of the electrocardiographic feature amount; and a second search reference point setting unit that sets a second reference point for searching the electrocardiographic waveform on the basis of the pulse wave feature amount when the electrocardiographic waveform is of quality to enable extraction of the electrocardiographic feature amount.

Abstract: Highly accurate blood pressure estimation based on a circulatory organ-related feature amount can be performed. A blood pressure estimation device includes a blood pressure estimation unit configured to acquire a circulatory organ-related feature amount that is a feature amount related to a state of a circulatory organ and changes in accordance with pulsation of a heart and to calculate a blood pressure value from the circulatory organ-related feature amount, and a reference blood pressure measurement unit including a sound wave detection unit configured to detect Korotkoff sound generated in accordance with the pulsation, the reference blood pressure measurement unit being configured to measure a reference blood pressure value by using the Korotkoff sound. The blood pressure estimation unit includes a feature amount acquisition unit configured to acquire the circulatory organ-related feature amount.

Abstract: A separation method for a separation target metal uses a metal ligand having an oxide of the separation target metal as a core. The separation method for the separation target metal includes a step of dispersing the metal ligand in a solution containing the separation target metal and separating the separation target metal in the solution as the oxide of the separation target metal. A metal coordination polymer includes: a metal oxide; and a ligand polymer that carries the metal oxide. The metal oxide is an oxide of any one, two, or more of cobalt, nickel, and manganese, and the ligand polymer is a copolymer of (1) an optionally substituted divinylbenzene and (2) acrylic acid or methacrylic acid.

Abstract: In a structure in which a lower arm is fixed to a vehicle, provided is a vehicle seat that can reduce an impact applied to a recliner. One aspect of the present disclosure is a vehicle seat including a lower arm and a recliner. The lower arm includes an arm body to which the recliner is attached, a first fixing portion to be attached to the vehicle in a lower position, and a second fixing portion attached to the vehicle in a rear position. The arm body includes a first recess arranged between the recliner and the first fixing portion in an up-down direction, the first recess extending from an edge of the arm body, and a second recess arranged between the recliner and the second fixing portion in a front-rear direction, the second recess extending from the edge of the arm body.

Abstract: There is provided a vehicle seat that allows detection of forgetting to mount a bracket for centering in a recliner with a limited space along a seat-width direction. One aspect of the present disclosure is a vehicle seat including a recliner mounted to a back frame. The recliner includes a recliner plate, a recliner main body configured to pivot the back frame relative to the recliner plate, a bracket fixed to the recliner plate, and a hinge pin penetrating the recliner main body, the recliner plate, and the bracket. The recliner plate includes a confirmation hole not overlapping the recliner main body. The bracket includes a body portion having a first through hole, and a detection target portion extending from the body portion to the confirmation hole and overlapping the confirmation hole.

Abstract: A biological information measurement device adapted to be attached on an upper arm of a human body and used thereon includes a belt portion adapted to be wound around the upper arm, electrocardiographic measurement means including a plurality of electrodes for detecting an electrocardiographic signal of the human body, pulse wave measurement means including a pulse wave sensor for detecting a pulse wave of the human body, heartbeat vibration measurement means including a vibration sensor for detecting vibration caused by beating of a heart of the human body, and an analysis processing unit configured to calculate a pre-ejection time and a pulse transit time of the heart based on time series data of the electrocardiographic signal, time series data of the pulse wave, and time series data of the vibration caused by the beating of the heart.

Abstract: A biological information measurement device includes a sensor unit that detects predetermined biological information related to an organ of a living body, an A/D conversion unit that converts a measurement signal output from the sensor unit into a digital signal, a storage unit that stores information including a digital signal related to the measurement signal output from the A/D conversion unit, an analysis processing unit that determines presence or absence of a suspicion of an abnormality in the organ by analyzing the digital signal, and a measurement control unit that changes a sampling frequency related to A/D conversion of the measurement signal under a predetermined condition when the analysis processing unit has determined that a suspicion of an abnormality is present in the organ.

Abstract: In a structure in which a lower arm is fixed to a vehicle, provided is a vehicle seat that can reduce an impact applied to a recliner. One aspect of the present disclosure is a vehicle seat including a lower arm and a recliner. The lower arm includes an arm body to which the recliner is attached, a first fixing portion to be attached to the vehicle in a lower position, and a second fixing portion attached to the vehicle in a rear position. The arm body includes a first recess arranged between the recliner and the first fixing portion in an up-down direction, the first recess extending from an edge of the arm body, and a second recess arranged between the recliner and the second fixing portion in a front-rear direction, the second recess extending from the edge of the arm body.

Abstract: There is provided a vehicle seat that allows detection of forgetting to mount a bracket for centering in a recliner with a limited space along a seat-width direction. One aspect of the present disclosure is a vehicle seat including a recliner mounted to a back frame. The recliner includes a recliner plate, a recliner main body configured to pivot the back frame relative to the recliner plate, a bracket fixed to the recliner plate, and a hinge pin penetrating the recliner main body, the recliner plate, and the bracket. The recliner plate includes a confirmation hole not overlapping the recliner main body. The bracket includes a body portion having a first through hole, and a detection target portion extending from the body portion to the confirmation hole and overlapping the confirmation hole.