Abstract: A central processing unit (CPU) of an information processing device acquires search history information on a word related to a question asked to a user and determines hint information related to the question to be presented to the user based on a discrimination result obtained by determining whether or not the acquired search history information satisfies a predetermined search history condition.

Abstract: An information processing apparatus includes at least one processor. The processor is configured to, based on question-giving history information on questions, identify, among users, a similar user who is similar to a target user among the users in proficiency tendency of the questions. The question-giving history information includes results of determination as to whether the users have correctly answered given questions that have been given to the users. The processor is further configured to derive a probability of the target user correctly answering a question as a deriving target question among the questions, based on a result of determination as to whether the similar user has correctly answered the deriving target question. The deriving target question is a question for which the probability is derived, and is a given question for the similar user. The processor is further configured to perform a specific process based on the derived probability.

Abstract: A connecting structure includes a connecting pin, a pin catch, a biasing member, and a holder. The connecting pin has a first portion, a second portion thicker than the first portion, and a step therebetween and connects a connecting object and a connected object (objects) by being inserted into their insertion holes. The pin catch moves in a recess in one of the objects in moving directions that are not an extending direction of the insertion holes and has a pin engagement portion that engages the step. The biasing member biases the pin catch in one of the moving directions. The holder is on the one of the objects and transitions, in response to user operation, to a first state where the holder and the biasing member holds the pin catch or a second state where the pin catch is detachable from the recess.

Abstract: A connection structure includes: a connection pin that includes a first part and a second part between which a step is formed and that connects a first target and a second target by being inserted in an insertion hole; and a pin locker movable in a moving direction in a recess formed in either the first or second target. The pin locker has a pin engaging part that engages with the step of the connection pin and a pin insertion part. One of the recess and the pin locker has a first abutting part, and another has a first abutted part. When the pin locker is at a specific position and the first abutting part abuts the first abutted part, at least either an orientation or a position of the pin insertion part is limited such that the second part is allowed to pass through the pin insertion part.

Abstract: An electronic portable keyboard instrument includes: a lower casing that includes a plurality of supporting members that support the fulcrums of a plurality of hammers, and a plurality of reinforcing members arranged in the first direction, each reinforcing member having a shape of rib that is erected upward from the lower casing and that is running in a length direction of the keys, wherein each of the plurality of supporting members sandwiches, from sides in the first direction, the corresponding hammer at the fulcrum so as to restrict movement of the hammer in the first direction, and wherein each of the reinforcing members is disposed in a gap between adjacent hammers, and a portion of the reinforcing members that corresponds to the weights of the adjacent hammers in position is lower than any other portions of the reinforcing member to avoid contacting the weights of the adjacent hammers.

Abstract: A signal light display determination device includes a memory to store a program; and a processor to execute the program, wherein the processor executes the program to acquire image information regarding a first region and a second region that is in close proximity to the first region, the first region and the second region being within a region containing at least a portion of a display of a signal light that is image-captured by a camera, determine, based on the acquired image information regarding the second region, a display state of the display included in the second region, and correct the acquired image information regarding the first region when a determination is made that the display state of the display included the second region has not continued in a state below a threshold for a predetermined time period, the correction being made based on the acquired image information regarding second region.

Abstract: An electronic device includes at least one processor configured to perform: receiving a selection operation from a user that selects one of a plurality of data types for a first data, the first data having a hierarchical structure, the plurality of data types being different from each other at least in terms of a way the first data is associated with a second data that is described at a different level in the hierarchical structure; and adapting the first data in accordance with the data type selected by the selection operation, and causing the adapted first data to be saved in a memory.

Abstract: The present disclosure relates to a titanium or titanium alloy member and to a surface hardening method for the titanium or titanium alloy member. The titanium or titanium alloy member includes a base material of titanium or titanium alloy, and at a surface of the base material, a hardened layer formed by diffusion of oxygen into the surface.

Abstract: A musical performance apparatus including at least one processor configured to: determine any phrase as a first phrase that is to be a performance target performed by a user from among a plurality of phrases included in a musical piece, and determine a set of phrases from the first phrase to a second phrase to be phrases that are to be the performance target performed by the user according to operation by the user in order to select the second phrase from the plurality of phrases.

Abstract: A power supply circuit includes a power supply which supplies DC power to a load, a switch which is selectively operable to (i) cause a short-circuit to occur between a DC power supply and an input terminal of the power supply and (ii) open a connection between the DC power supply and the input terminal of the power supply, a sensor which measures a temperature and a processor configured to control the switch to open the connection in response to a decision that the DC power is not being supplied to the load even when the switch is being controlled to cause the short-circuit to occur, and control the switch to cause the short-circuit to occur after a predetermined time elapses after controlling the switch to open the connection in response to the decision. The predetermined time is set based on the temperature measured by the sensor.

Abstract: An autonomous mobile apparatus includes a memory and a processor. The processor is configured to acquire environment information that is information of a surrounding environment of the autonomous mobile apparatus, based on the acquired environment information, select, as an estimation environment map, an environment map that is suitable for the surrounding environment from among environment maps that are saved in the memory, and estimate a location of the autonomous mobile apparatus using the selected estimation environment map and an image of surroundings of the autonomous mobile apparatus that is captured by an imager.

Abstract: In a physical strength evaluation system, a reference storage stores a walking heart rate reference in which a correspondence relationship of a standard value of a relative heart rate with respect to a walking speed is defined for every gender and every age, a speed acquisition unit acquires a measured value of a walking speed of a subject, a heart rate acquisition unit acquires a measured value of the relative heart rate of the subject. A standard value derivation unit derives the standard value of the relative heart rate corresponding to the measured value of the walking speed that has been acquired, based on the walking heart rate reference. A level determination unit determines an evaluation value of a physical strength level of the subject, based on a difference between the measured value of the relative heart rate and the standard value of the relative heart rate.

Abstract: A control device includes a wireless communication unit configured to transmit and receive a signal with a communication terminal with which wireless connection has been established, a control unit configured to perform predetermined control according to a request signal from the communication terminal, and a printing unit configured to print on a to-be-printed medium. When the wireless communication unit detects disconnection of the wireless connection with the communication terminal while the printing unit is printing on the to-be-printed medium, the control unit keeps the wireless communication unit in a state in which transmission of the beacon signal containing identification information of the wireless communication unit is stopped.

Abstract: A running analysis device includes a processor and a memory storing a program. By executing the program, the processor performs obtainment, setting, and estimation processes. By the obtainment process, first data on an acceleration in an up direction perpendicular to a moving direction of a subject and second data on an acceleration in a direction opposite to the moving direction are obtained from a motion sensor attached to the subject's head or neck and including an acceleration sensor, the first and second data being detected by the acceleration sensor while the subject is running. By the setting process, a candidate time range including a candidate timing for a ground-contacting timing when a foot of the subject contacts the ground is set based on the first data. By the estimation process, the ground-contacting timing is estimated in the candidate time range, based on a timing when the second data is minimum.

Abstract: A CAP detection device configured to acquire pulse wave data of a subject, derive a baseline of the data and an envelope of the baseline, identify a local maximum point of the envelope and determine, as CAP candidate points, a first local maximum point of the baseline before the local maximum point of the envelope and a second local maximum point of the baseline after the local maximum point, and identify, for each CAP candidate point, a third local maximum point of the baseline before the CAP candidate point and a local minimum point of the baseline between the CAP candidate point and the third local maximum point and detect the CAP candidate point as a CAP based on an evaluation value obtained from a difference between the CAP candidate point and the third local maximum point and a difference between the CAP candidate point and the local minimum point.

Abstract: A projection device includes an optical lens and a light source. The optical lens has an incident surface of light, a reflecting surface that has a concave curved surface and internally reflects light that has entered through the incident surface, and an exit surface of light that has been reflected by the reflecting surface. The light source that emits light that enters the optical lens.

Abstract: An embodiment of an electronic timepiece includes a cylindrical exterior case, a bezel and a windshield member. In the exterior case, a circuit board is housed. The bezel is formed of a metal material to be ring-shaped, includes an inward flange part that projects from an inner side surface toward a center of the ring-shaped bezel, is arranged on an outer upper side of the exterior case and is electrically connected with the circuit board. The windshield member is formed of a transparent dielectric substance, arranged in the bezel and supported by the inward flange part. The bezel is configured to resonate with a radio wave having a desired frequency by adjustment of at least one of (i) a relative permittivity of the dielectric substance and (ii) an area of an overlap region where the inward flange part and the windshield member overlap each other.

Abstract: A thermally expandable sheet according to the present invention includes a stress buffer layer provided on one surface of a base material and having an elastic property, a thermal expansion layer provided on the stress buffer layer and containing a first thermally expandable material that expands according to heat and a first binder, and a cover layer provided on the thermal expansion layer and having an elastic property.

Abstract: Provided is an information processing apparatus including at least one processor that executes a display control process to display a remote operation screen, a copy of an operation screen displayed on a display of a representative terminal device, for collective remote operation of multiple terminal devices in a first display region. In the display control process, in response to a user operation on the remote operation screen, the processor displays, in the first display region, a result of an input of the user operation to the representative terminal device, and displays, in a second display region, a copy of a screen that is displayed on a display of the multiple terminal devices other than the representative terminal device and that shows a result of an input of the user operation to the multiple terminal devices other than the representative terminal device, the second display region being different from the first display region.

Abstract: A non-transitory computer-readable recording medium storing a program executable by at least one processor of an information processing apparatus, wherein the at least one processor acquires first state data indicating a state in which a first target person has used a functional element realized by execution of a target program, acquires estimation data for estimating information on the functional element matched to the first target person, in accordance with an arithmetic model, on the basis of the acquired first state data, the arithmetic model being generated by machine learning based on at least one of second state data indicating a state in which a second target person different from the first target person has used the functional element in the past and the first state data saved in the past, and causes a presentation unit to present the information on the functional element on the basis of the acquired estimation data.