Abstract: Provided is a light emitting and receiving device capable of causing light to exit to outside and receiving light from outside. The light emitting and receiving device includes a plurality of light emitting elements and a plurality of light receiving elements. The plurality of light emitting elements is two-dimensionally arranged separately. The plurality of light receiving elements is two-dimensionally arranged at a height different from a height of the plurality of light emitting elements, and each light receiving element faces an inter-element separation portion between adjacent light emitting elements.

Abstract: A liquid ejection recording element unit includes: a first substrate provided with a first partition wall that demarcates a first flow channel including an ejection port of a liquid, and an energy generating portion that generates energy for ejecting the liquid from the first flow channel; and a second substrate provided with a second partition wall that demarcates a second flow channel including a supply port of the liquid, the second substrate being stacked on the first substrate, so that the second flow channel communicates with the first flow channel. The first partition wall and the second partition wall are contiguous across a predetermined gap, in the stacking direction of the first substrate and the second substrate. A hydraulic diameter of the gap is smaller than a hydraulic diameter of a smallest flow channel portion having a minimum flow channel cross-sectional area in the first flow channel.

Abstract: A recording element unit includes a first electrode pad, a second electrode pad, and a wire for electrically connecting the first electrode pad and the second electrode pad. The wire has a plurality of bending points at which the wire is bent in the direction of extension of the wire between a first connection point and a second connection point, the plurality of bending points include a first bending point at a height from the first connection point of at least 100 ?m and not more than 200 ?m, a second bending point at a distance from the first bending point in the horizontal direction of at least 100 ?m and not more than 270 ?m, and a third bending point at a distance from the intermediate point between the first electrode pad and the second electrode pad in the horizontal direction of within 150 ?m.

Abstract: The reservation management system includes an input device and a reservation management unit. The input device includes a manual operation part movable between a first position and a second position and sends a wireless signal containing movement information of the manual operation part and ID information. The reservation management unit performs reservation management based on the wireless signal sent from the input device. The reservation management unit includes a clock unit, a storage unit, and a determination unit. The clock unit measures time. The storage unit associates reservation information containing a reservation start time, and the ID information with each other and stores them. The determination unit determines a reservation performance status based on a current time, the reservation start time, and the movement information.

Abstract: Included are a bottom portion having a traveling portion, a body portion having a first pillar portion and a second pillar portion extending in a vertical direction, respectively, from one end and another end in a horizontal direction of the bottom portion, and a top portion including one end connected to an end of the first pillar portion opposite to the bottom portion and including another end connected to an end of the second pillar portion opposite to the bottom portion, an article storage portion that forms an opening with the first pillar portion, the second pillar portion, the top portion, and the bottom portion in such a way that the opening penetrates the body portion, and fixing portions provided in the first and second pillar portions to sandwich the opening and pair up with each other, for fixing an article storage auxiliary instrument.

Abstract: The reservation management system includes an input device and a reservation management unit. The input device includes a manual operation part movable between a first position and a second position and sends a wireless signal containing movement information of the manual operation part and ID information. The reservation management unit performs reservation management based on the wireless signal sent from the input device. The reservation management unit includes a clock unit, a storage unit, and a determination unit. The clock unit measures time. The storage unit associates reservation information containing a reservation start time, and the ID information with each other and stores them. The determination unit determines a reservation performance status based on a current time, the reservation start time, and the movement information.

Abstract: Included are a bottom portion having a traveling portion, a body portion having a first pillar portion and a second pillar portion extending in a vertical direction, respectively, from one end and another end in a horizontal direction of the bottom portion, and a top portion including one end connected to an end of the first pillar portion opposite to the bottom portion and including another end connected to an end of the second pillar portion opposite to the bottom portion, an article storage portion that forms an opening with the first pillar portion, the second pillar portion, the top portion, and the bottom portion in such a way that the opening penetrates the body portion, and fixing portions provided in the first and second pillar portions to sandwich the opening and pair up with each other, for fixing an article storage auxiliary instrument.

Abstract: A nonaqueous electrolyte secondary battery having an electrode group in which a positive electrode plate containing a positive electrode active material and a negative electrode plate containing a negative electrode active material are wound with a separator there between. The positive electrode active material uses a lithium transition metal oxide represented by the formula LiaNixM1?xO2 (0.9?a?1.2, 0.8?x<1, and M is at least one element of Co, Mn, and Al). The positive electrode plate is provided with a current-collecting tab placed in a position that is 200 mm or more apart from the winding start of the positive electrode plate. The separator has an MD direction tensile strength (SMD)-to-TD direction tensile strength (STD) ratio (SMD/STD) of from 0.72 to 1.37 and an MD direction tensile elongation (EMD)-to-TD direction tensile elongation (ETD) ratio (EMD/ETD) of from 0.34 to 1.29.