Abstract: An information processing system includes an information acquirer configured to acquire input information including finger information relating to a finger of a user playing a string instrument and an image of a fretboard of the string instrument and sound information of sound of the string instrument played by the user, and an information generator configured to generate fingering information indicative of fingering by processing the acquired input information using a generation model that learns a relationship between training input information and training fingering information.

Abstract: A printing apparatus includes: a first frame; a second frame fixed to the first frame, the second frame having an accommodation space configured to accommodates a roll, the roll having a printing medium rolled thereon; a pair of support parts supported on the second frame, the pair of support parts being configured to support end faces of the roll in a first direction, at least one of the pair of support parts being supported on the second frame so as to be movable in the first direction; a guide member provided on the first frame; and contact portions provided to the support parts, the contact portions being configured to slide while being in contact with the guide member.

Abstract: A composition for aqueous ink contains water and a coloring material, wherein the calcium ion content x (ppm) and the oxalate ion content y (ppm) in the composition for aqueous ink jet satisfy the relation of y?3491.8x?3.386.

Abstract: A composition for aqueous ink jet contains a specific dye which is one or more coloring materials selected from the group consisting of C. I. Acid Black 172 and C. I. Acid Black 194, and a specific aromatic compound which is at least one compound selected from the group consisting of compounds represented by formulae (1) to (4) below. The content of the specific aromatic compound relative to 100 parts by mass of the specific dye is 0.2 parts by mass or more and 50 parts by mass or less.

Abstract: The optical apparatus comprises an optical member and an aluminum alloy member facing the optical member. A black oxide coating is formed on a surface of the aluminum alloy member facing the optical member, and a plurality of holes each having a diameter of 5 ?m or more and 100 ?m or less are formed in the black oxide coating.

Abstract: A printing device includes a frame, and an electronic circuit-board unit attached to the frame. The electronic circuit-board unit includes: a holder including a holding portion; a first substrate held to a first surface of the holder; a second substrate held to a second surface of the holder and attached to the frame; an electronic component; and a harness electrically connected to the electronic component. The holder has: a first region overlapped with the first substrate in a plan view; and a second region offset from the first region in the plan view. At least one of the electronic component and the harness is held by the holding portion.

Abstract: A printing apparatus includes: a main body having an accommodation part accommodating a printing medium; and an opening/closing cover supported by the main body so as to be swingable between a closed position and an opened position, a first unit and a second unit being selectively installable to the opening/closing cover, the first unit being configured to rotatably support a first platen roller, the second unit being configured to rotatably support a second platen roller, the opening/closing cover including a cover guide, the opening/closing cover having a discharge port discharging the guided printing medium. The first unit has a partition wall superposed to cover the cover guide and partitioning a space into the first platen roller-side and the discharge port-side in a case the first unit is installed to the opening/closing cover.

Abstract: A printing apparatus includes a platen roller conveying a printing medium in a first direction, a peeler peeling off a label from a mount, a support member supporting a driven roller that conveys the mount in a second direction with the platen roller, and a rib portion provided on the support member and guiding the label peeled off from the mount in the first direction. The rib portion includes a first rib, a second rib and a third rib, continuously in the first direction. The first rib is inclined away from a virtual line in the first direction toward an upstream side from the second rib. The third rib is inclined away from the virtual line in the first direction toward a downstream side from the second rib.

Abstract: A printing apparatus includes: a print head; a main body having an accommodation part accommodating a printing medium; an opening/closing cover supported by the main body to be swingable between a closed position and an opened position, the opening/closing cover covering the accommodation part in a case the opening/closing cover is in the opened position, the opening/closing cover opening the accommodation part in a case the opening/closing cover is in the opened position; a support member provided to the opening/closing cover; and a platen holder provided to the support member and configured to rotatably support a platen roller, the platen roller being configured to convey the printing medium at a position facing the print head in the case the opening/closing cover is in the closed position.

Abstract: An object is to promote a reduction in thickness of a light guide plate and to provide a technique for suppressing brightness non-uniformity in the light guide plate. A light guide plate includes: a depressed portion provided on an opposite side of a light exit surface from which light is emitted; a first direction changing portion which is provided inside the depressed portion and above a light emitting element in a direction oriented toward the light exit surface, the light emitting element being provided on the opposite side of the light exit surface, and which changes a direction of travel of at least a part of light of the light emitting element; and a second direction changing portion which is provided above the light emitting element and higher than the light exit surface and which changes a direction of travel of at least a part of light of the light emitting element.

Abstract: A printing device includes: a main body including an accommodating portion configured to accommodate a printing medium; a cover displaceable between an open position where the accommodation portion is opened and a closed position where the accommodation portion is closed; a platen roller attached to the cover and rotatably supported by the cover; a peeling roller attached to the cover and supported so as to be rotatable about an axis parallel to a longitudinal direction of the platen roller; and a switching mechanism attached to the cover and configured to switch the peeling roller between a contact position where the peeling roller comes into contact with the platen roller and a non-contact position where the peeling roller is away from the platen roller in conjunction with displacement of the cover.

Abstract: A printing apparatus includes: a housing having a discharge port through which a printing medium being allowed to be discharged; an installation part to which a unit being removably installable to the installation part, the unit being configured to surround at least a part of the discharge port in a case the unit is installed, the unit being configured to perform specific processing on the printing medium; and a lid member removably installed to the installation part, the lid member being installable to the installation part in a case the unit is not installed to the installation part.

Abstract: To provide a technique for suppressing brightness non-uniformity of an area illuminated by a light source and also suppressing a decline in contrast between areas caused by incidence of a luminous flux of the area to another area. Provided is a light guide plate including: a diverging portion which is provided on an opposite side of a light exit surface from which light is emitted, the diverging portion causing a luminous flux emitted from a light emitting element to diverge; and a restricting portion which is provided, when a prescribed range from the light emitting element on the light exit surface is defined as an illuminated area illuminated by the light emitting element, in at least a periphery of the illuminated area on the light exit surface and which deflects or shields light traveling from inside toward outside of the illuminated area to restrict traveling, toward a side of the light exit surface, of light traveling toward the outside of the illuminated area.

Abstract: There is provided a battery charger configured to charge a battery including a battery terminal. The battery charger includes a receiving portion in a form of a recess, and a charging terminal provided in the receiving portion. The battery is attachable to and detachable from the receiving portion. The receiving portion includes a holding portion configured to selectively hold the battery in the receiving portion at one of a first posture and a second posture different from the first posture. When the battery is in the first posture, the battery terminal is in contact with the charging terminal to allow the battery to be charged. When the battery is in the second posture, the battery terminal is separated from the charging terminal.

Abstract: A printing device includes a frame, and an electronic circuit-board unit attached to the frame. The electronic circuit-board unit includes: a holder including a holding portion; a first substrate held to a first surface of the holder; a second substrate held to a second surface of the holder and attached to the frame; an electronic component; and a harness electrically connected to the electronic component. The holder has: a first region overlapped with the first substrate in a plan view; and a second region offset from the first region in the plan view. At least one of the electronic component and the harness is held by the holding portion.

Abstract: A printing apparatus includes: a first frame; a second frame fixed to the first frame, the second frame having an accommodation space configured to accommodates a roll, the roll having a printing medium rolled thereon; a pair of support parts supported on the second frame, the pair of support parts being configured to support end faces of the roll in a first direction, at least one of the pair of support parts being supported on the second frame so as to be movable in the first direction; a guide member provided on the first frame; and contact portions provided to the support parts, the contact portions being configured to slide while being in contact with the guide member.

Abstract: A printing apparatus includes a platen roller conveying a printing medium in a first direction, a peeler peeling off a label from a mount, a support member supporting a driven roller that conveys the mount in a second direction with the platen roller, and a rib portion provided on the support member and guiding the label peeled off from the mount in the first direction. The rib portion includes a first rib, a second rib and a third rib, continuously in the first direction. The first rib is inclined away from a virtual line in the first direction toward an upstream side from the second rib. The third rib is inclined away from the virtual line in the first direction toward a downstream side from the second rib.

Abstract: A printing apparatus includes: a main body having an accommodation part accommodating a printing medium; and an opening/closing cover supported by the main body so as to be swingable between a closed position and an opened position, a first unit and a second unit being selectively installable to the opening/closing cover, the first unit being configured to rotatably support a first platen roller, the second unit being configured to rotatably support a second platen roller, the opening/closing cover including a cover guide, the opening/closing cover having a discharge port discharging the guided printing medium. The first unit has a partition wall superposed to cover the cover guide and partitioning a space into the first platen roller-side and the discharge port-side in a case the first unit is installed to the opening/closing cover.

Abstract: A printing apparatus includes: a print head; a main body having an accommodation part accommodating a printing medium; an opening/closing cover supported by the main body to be swingable between a closed position and an opened position, the opening/closing cover covering the accommodation part in a case the opening/closing cover is in the opened position, the opening/closing cover opening the accommodation part in a case the opening/closing cover is in the opened position; a support member provided to the opening/closing cover; and a platen holder provided to the support member and configured to rotatably support a platen roller, the platen roller being configured to convey the printing medium at a position facing the print head in the case the opening/closing cover is in the closed position.

Abstract: A printing apparatus includes: a housing having a discharge port through which a printing medium being allowed to be discharged; an installation part to which a unit being removably installable to the installation part, the unit being configured to surround at least a part of the discharge port in a case the unit is installed, the unit being configured to perform specific processing on the printing medium; and a lid member removably installed to the installation part, the lid member being installable to the installation part in a case the unit is not installed to the installation part.