Abstract: An odor is detected with high accuracy. A sensing system includes: a sensor apparatus including a filter to remove an odor-causing substance contained in air and a sensor unit including one or more detection elements to detect an amount of the odor-causing substance contained in air; and an information processing apparatus including a difference calculation unit to calculate a difference between a detection value of each of the one or more detection elements, the detection value indicating an amount of the odor-causing substance contained in air that has passed through the filter and a detection value of each of the one or more detection elements, the detection value indicating an amount of the odor-causing substance contained in air that has not passed through the filter, and a determination unit to determine an odor of air based on the calculated difference.

Abstract: A sensor device includes a substrate; a piezoelectric film on the substrate; a lower electrode and an upper electrode that face each other with at least part of the piezoelectric film sandwiched therebetween; and a sensitive film in a region on the upper electrode that approximately corresponds to a resonance region, the resonance region being defined as a region in a plan view in which the lower electrode and the upper electrode face each other with the piezoelectric film sandwiched therebetween and in which a resonance in a thickness longitudinal vibration mode occurs, the sensitive film being absent in regions on the upper electrode and on the lower electrode that are outside of the resonance region in the plan view.

Abstract: [Object] To provide an arithmetic device, an arithmetic method, and a gas detection system that are capable of easily correcting deterioration over time of a detection element. [Solving Means] The arithmetic device includes a calculation unit. The calculation unit calculates a correction coefficient from a detection element that causes a resonant frequency change by adsorption of gas on the basis of a resonant frequency change amount associated with a humidity change of the detection element in a degraded state and a resonant frequency change amount associated with a humidity change of the detection element in an initial state that was acquired in advance, and corrects the resonant frequency change amount of the detection element in the degraded state by using the correction coefficient.

Abstract: A gas determination method uses a sensor having a field-effect transistor structure including a gate electrode, an insulating film formed on the gate electrode, a source electrode and a drain electrode formed on the insulating film, and a graphene layer formed on the insulating film and connecting the source electrode and the drain electrode to each other. The gas determination method includes: supplying gas to the graphene layer; applying a first voltage to the gate electrode for a predetermined period of time; and thereafter measuring a change in a current flowing between the source electrode and the drain electrode when a sweep voltage is applied to the gate electrode, repeating the same current measurement with a second voltage different from the first voltage, and determining the gas based on the measurement results.

Abstract: An air conditioning system includes: an air conditioner to regulate a state of air in a room; a sensor device including at least one detector to detect an amount of an odor-causing substance included in the air in the room; and a control device to control operation of the air conditioner. The control device includes: a first acquisition unit to acquire a detected value of each of the at least one detector at a first timing when a person is present in the room; a second acquisition unit to acquire a detected value of each of the at least one detector at a second timing later than the first timing; a difference calculator to calculate a difference between the detected value at the first timing and the detected value at the second timing; and an instruction unit to control operation of the air conditioner based on the difference.

Abstract: An odor is detected with high accuracy. A sensing system includes: a sensor apparatus including a filter to remove an odor-causing substance contained in air and a sensor unit including one or more detection elements to detect an amount of the odor-causing substance contained in air; and an information processing apparatus including a difference calculation unit to calculate a difference between a detection value of each of the one or more detection elements, the detection value indicating an amount of the odor-causing substance contained in air that has passed through the filter and a detection value of each of the one or more detection elements, the detection value indicating an amount of the odor-causing substance contained in air that has not passed through the filter, and a determination unit to determine an odor of air based on the calculated difference.

Abstract: A cement composition is disclosed containing: cement; cellulose nanofibers; and water, wherein a mass ratio of the water to cement is 0.4 or less. The cement is preferably Portland cement. It is preferred that the Portland cement is high-early-strength Portland cement, and that a mass ratio of fine aggregate to the high-early-strength Portland cement is 2.0 or less. A unit amount of cellulose nanofibers in the cement composition can be 0.1 kg/m3 to 15 kg/m3 Furthermore, a hardened body of the cement composition is disclosed, wherein a ratio of a splitting tensile strength of the hardened body at a material age of 91 days obtained by curing in air, to the splitting tensile strength of the hardened body at the material age if 91 days obtained by curing in water is 0.90 or more and 1.10 or less, the splitting tensile strength being measured in accordance with JIS-A-1113 (2006).

Abstract: An air conditioning system includes: an air conditioner to regulate a state of air in a room; a sensor device including at least one detector to detect an amount of an odor-causing substance included in the air in the room; and a control device to control operation of the air conditioner. The control device includes: a first acquisition unit to acquire a detected value of each of the at least one detector at a first timing when a person is present in the room; a second acquisition unit to acquire a detected value of each of the at least one detector at a second timing later than the first timing; a difference calculator to calculate a difference between the detected value at the first timing and the detected value at the second timing; and an instruction unit to control operation of the air conditioner based on the difference.

Abstract: A piezoelectric thin film resonator includes: a substrate; a piezoelectric film that is located on the substrate and includes a first film made of an aluminum nitride film containing an additive element and second films located on an upper surface and a lower surface of the first film and made of an aluminum nitride film containing the additive element at a concentration lower than that of the first film; and a lower electrode and an upper electrode that are located to sandwich the piezoelectric film.

Abstract: An acoustic wave device includes: a piezoelectric film made of an aluminum nitride film containing a divalent element and a tetravalent element, or a divalent element and a pentavalent element; and an electrode that excites an acoustic wave propagating through the piezoelectric film.

Abstract: A piezoelectric thin film resonator includes: a substrate; a piezoelectric film that is located on the substrate and includes a first film made of an aluminum nitride film containing an additive element and second films located on an upper surface and a lower surface of the first film and made of an aluminum nitride film containing the additive element at a concentration lower than that of the first film; and a lower electrode and an upper electrode that are located to sandwich the piezoelectric film.

Abstract: A connection member which connects an outside portion of a cross member and an inside wall face portion of a side sill includes a cross-member-side connection portion connected to the cross member and a side-sill-side connection portion connected to the side sill, the side-sill-side connection portion is configured to have a lower rigidity than the cross-member-side connection portion, and an outside end portion of the cross member is located at a specified position which is located on the outside of the cross-member-side connection portion and on the inside away from the inside wall face portion of the side sill. Thereby, the impact load in the vehicle side collision can be effectively supported by the cross member with a simple structure.

Abstract: A transmitting/receiving filter (filter device) according to one embodiment of the present invention is provided with a transmitting filter, a receiving filter, and a support substrate. The transmitting filter includes a first resonator constituted of a BAW device (FBAR, SMR). The receiving filter includes a second resonator constituted of a Lamb wave device. The support substrate supports both the transmitting filter and the receiving filter. The transmitting filter and the receiving filter are constituted of elastic wave resonators that resonate at different oscillation modes from each other, which allows miniaturization of the support substrate to be realized while preventing oscillation interference between the two filters.

Abstract: An acoustic wave device includes: a piezoelectric film made of an aluminum nitride film containing a divalent element and a tetravalent element, or a divalent element and a pentavalent element; and an electrode that excites an acoustic wave propagating through the piezoelectric film.

Abstract: A connection member which connects an outside portion of a cross member and an inside wall face portion of a side sill includes a cross-member-side connection portion connected to the cross member and a side-sill-side connection portion connected to the side sill, the side-sill-side connection portion is configured to have a lower rigidity than the cross-member-side connection portion, and an outside end portion of the cross member is located at a specified position which is located on the outside of the cross-member-side connection portion and on the inside away from the inside wall face portion of the side sill. Thereby, the impact load in the vehicle side collision can be effectively supported by the cross member with a simple structure.

Abstract: An acoustic wave device includes: a piezoelectric film made of an aluminum nitride film containing a divalent element and a tetravalent element, or a divalent element and a pentavalent element; and an electrode that excites an acoustic wave propagating through the piezoelectric film.