Abstract: A muscular fatigue determination apparatus includes an information obtaining unit that obtains loads applied to a pedal of a bicycle, rotation speeds of a crank of the bicycle, and myoelectric potentials of a user, the myoelectric potentials and the loads being in a one-to-one relationship, the myoelectric potentials and the rotation speeds being in a one-to-one relationship, and a muscular fatigue information generation unit that generates muscular fatigue information regarding the user on the basis of whether a difference between the myoelectric potentials of the user is larger than a first threshold, each of the myoelectric potentials being associated to a load range that is one of load ranges and to a rotation speed range that is one of rotation speed ranges, each of the loads belonging to one of the load ranges and each of the rotation speed ranges belonging to one of the rotation speed ranges.

Abstract: A data generation apparatus includes a processor and a memory. The memory stores a generation rule including one or more time change values and/or one or more amplitude change values. The processor (a1) obtains a first biological data item including an event-related potential of a user and obtains a first label associated with the first biological data item, (a2) refers to the generation rule and generates one or more second biological data items by changing the first biological data item using the one or more time change values and/or the one or more amplitude change values, and (a3) outputs the one or more second biological data items associated with the first label, as training data related to the user.

Abstract: A method for expanding a word performed by a processor includes (a) obtaining a first word, (b) obtaining, from a memory, a concept map that is unique to a user and that includes a plurality of second words and semantic distances between the plurality of second words, the plurality of second words including words belonging to different categories, (c) determining, if the plurality of second words include a word corresponding to the first word, the word corresponding to the first word as a basic word, (d) selecting, on the basis of the semantic distances to the basic word, at least one of the plurality of second words included in the concept map as an adjacent word, and (e) outputting a result of a search on the basis of the first word and the adjacent word.

Abstract: A method includes (a) obtaining a search word, (b) obtaining first to third concept maps including words and semantic distances between the words, (c) obtaining a first association map including degrees of association indicating how close the semantic distances included in the first and second concept maps are to each other; (d) obtaining a second association map including degrees of association indicating how close the semantic distances included in the first to third concept maps are to one another, (e) extracting, from the words as an associated word, at least one word whose difference between the degree of association with the search word included in the first association map and the degree of association with the search word included in the second association map is equal to or larger than a first threshold, and (f) outputting a result of a search based on the search word and the associated word.

Abstract: In the electronic apparatus, a contact impedance compensation controller calculates a first compensation value and a second compensation value so that a resulting value obtained by adding a third resistance value between a measuring electrode and first skin to a first resistance value is equal to a resulting value obtained by adding a fourth resistance value between a reference electrode and second skin to a second resistance value, determines first information on the basis of the first compensation value, determines the second information on the basis of the second compensation value, and sends the first information to the first compensation circuit.

Abstract: A biological information measurement system includes: a plurality of electrodes; a current source connected to the plurality of electrodes to supply a current thereto; a measurement unit for measuring impedance from a potential difference between the plurality of electrodes; a detector for detecting values of specific peaks from chronological data of the impedance; an envelope generator for generating an envelope of values of the specific peaks; and an output unit for outputting information of the envelope as biological information.

Abstract: An information processing system includes first and second electrodes for measuring cardiac potential, a pulse wave sensor that is disposed closer to the first electrode than to the second electrode and that measures a pulse wave, a buffer that amplifies a signal acquired by the first electrode, an interconnect wire that electrically connects the first electrode to a terminal of the buffer, a shield that shields the first electrode and the interconnect wire, and a shield potential generator that includes a first buffer circuit and a second buffer circuit having a larger drive current than the first buffer circuit and that starts applying, to the shield, a first generation signal generated by the first buffer circuit based on the acquired signal before a predetermined time point when the pulse wave is measured and starts applying a second generation signal generated by the second buffer circuit at the predetermined time point.

Abstract: A sensor device includes a plurality of electrode chambers, a measurement chamber, and an accommodation chamber which are connected in annular relationship permitting expansion and contraction. Each of the plurality of electrode chambers has a measurement electrode. The measurement chamber has a biological potential measurement circuit which is connected with each measurement electrode via electrically conductive wiring for measuring biological potential of the user by using the measurement electrode. The accommodation chamber has an internal protrusion. The wiring which connects at least one measurement electrode and the biological potential measurement circuit is provided around the protrusion, the wiring having a length which enables longitudinal feeding in accordance with an amount of elongation when the sensor device is elongated. A maximum clearance S between the accommodation chamber and an adjacent chamber is greater than a maximum clearance R between any two adjacent chambers.

Abstract: A program generating method acquires a first image set, and retrieves a similar image that is similar to a processing target image included in the first image set, from a database. For each of N number of second image sets in the database, an integrated similarity of an image included in the second image set with respect to the processing target image is calculated based on a first similarity between the image included in the second image set and the processing target image, a second similarity between the second image set and the first image set, and the completeness of the first image set, and the similar image is retrieved based on the integrated similarity.

Abstract: An input image being displayed is acquired. A database is accessed to search for an image similar to the input image from images stored in the database. A candidate script associated with the similar image is retrieved from the database, and a decisive degree of the candidate script is calculated based on a result of the search for the similar image. A presentation program is generated by changing a value of a parameter included in the candidate script depending on the decisive degree. The input image is changed by executing the generated presentation program.

Abstract: A blood pressure estimation apparatus includes: a pulse wave measurement unit measuring a user's pulse wave signal; an electrocardiogram signal measurement unit measuring a user's electrocardiogram signal; and a processing circuit estimating a user's blood pressure value by using the pulse wave and electrocardiogram signals, wherein the processing circuit (a) acquires a pulse wave signal feature by using the pulse wave signal, (b) acquires an electrocardiogram signal feature by using the electrocardiogram signal, (c) acquires a pulse wave propagation time by using the pulse wave and electrocardiogram signals, (d) selects a blood pressure group indicating a relationship between a pulse wave propagation time and blood pressure of the user by using the pulse wave signal feature, electrocardiogram signal feature, and pulse wave propagation time, and (e) estimates the blood pressure value by using the blood pressure group, pulse wave signal feature, electrocardiogram signal feature, and pulse wave propagation time

Abstract: A learning system includes an output unit that outputs a first problem and a display message prompting a user to take a break, an acquisition unit that acquires an answer to the first problem from the user, an electroencephalogram measurement unit that measures an electroencephalogram of the user, and a control unit. The control unit determines whether first motivation is present on the basis of a first event-related potential included in the electroencephalogram and starting from a timing at which the first problem is output, determines whether second motivation of the user is present on the basis of a second event-related potential included in the electroencephalogram and starting from a timing at which the answer is acquired, and instructs the output unit to output a display message prompting the user to take a break if the first motivation is not present and the second motivations is not present.

Abstract: A personal authentication apparatus includes a measuring circuit that measures a user electrocardiographic waveform using electrodes, a peak detector that detects peaks of first and second R waves and at least one of peaks of P and Q waves, and an acquirer. The acquirer expands/contracts a time interval between the peaks of the first and second R waves to a first time period and further (i) expands/contracts a time interval between the peaks of the first R wave and P wave to a second time period, (ii) expands/contracts a time interval between the peaks of the first R wave and Q wave to a third time period, or (iii) expands/contracts the time interval between the peaks of the first R wave and P wave to the second time period and expands/contracts the time interval between the peaks of the first R wave and Q wave to the third time period.

Abstract: A hearing aid gain determination system includes: a biological signal measurement section for measuring an electroencephalogram signal; a sound group determination section for determining a frequency of a sound group including first, second and third sounds; a sound pressure determination section for determining sound pressures of the first to third sounds so that the respective sound pressures are less than a threshold and that the first to third sounds consecutively decrease; an output section for presenting the first to third sounds at the determined frequency and sound pressures; a characteristic amount extraction section for extracting a characteristic amount concerning time-frequency information of an event-related potential in a time range after presenting the first to third sounds; a gain determination section for determining a hearing aid gain for the frequency of the sound stimulation group against a predetermined criterion based on the characteristic amounts.

Abstract: An individual authentication method includes (i) indicating a first position of a user's arm or arms when gripping an electrocardiographic sensor, (ii) measuring the user's electrocardiographic activity at the first position by using the electrocardiographic sensor, (iii) indicating a second position of the user's arm or arms when gripping the electrocardiographic sensor, the second position being different from the first position, (iv) measuring the user's electrocardiographic activity at the second position by using the electrocardiographic sensor, (v) receiving ID information of the user, and (vi) registering, in a database, electrocardiographic authentication information including first authentication information associating the ID information with the user's electrocardiographic activity measured at the first position, and second authentication information associating the ID information with the user's electrocardiographic activity measured at the second position.

Abstract: An exemplary electronic device is in a housing to be gripped by a right hand and a left hand of a user, and has a plurality of manipulable portions. The electronic device includes: electrodes placed at positions which come in contact with the right hand and left hand of the user gripping the housing; an extractor for extracting an electrocardiographic component of the user from a potential difference between the electrodes; a determination section for determining whether the extracted electrocardiographic component is in a positive direction or a negative direction by referring to a prestored criterion; and a change section for, in accordance with a result of determination by the determination section, changing assignment between each of the plurality of manipulable portions and a manipulation signal generated in response to a manipulation.

Abstract: The apparatus includes: a detection section for detecting a time period during which an operator is making preparations prior to beginning a driving operation; an adjustment section for adjusting a determination criterion for determining a state of attention of the operator during a driving operation, which calculates an eye fixation related potential of the electroencephalogram signal of the operator measured at least in the time period by using the measured oculomotor signal of the operator, and which adjusts the determination criterion based on the calculated eye fixation related potential; a determination section for calculating an eye fixation related potential from the electroencephalogram signal and the oculomotor signal of the operator measured after beginning the driving operation, which determines a state of attention of the operator during the driving operation based on the calculated eye fixation related potential and the adjusted determination criterion; and an output section for acting to call a

Abstract: An exemplary electronic device is in a housing to be gripped by both hands, and measures the potentials of first and second fingers of respectively different hands. The device includes: a first electrode group provided in a position to come in contact with the first finger, including a first main electrode and at least one first auxiliary electrode provided in a position away from the first main electrode; a second electrode group provided in a position to come in contact with the second finger, including a second main electrode and at least one second auxiliary electrode provided in a position away from the second main electrode; a biological signal processor for, from potential values measured at the first and second electrode groups, determining respective contact states concerning the first and second fingers; and a transmission circuit for presenting information concerning a finger contact state based on a result of determination.

Abstract: A personal authentication apparatus includes a measuring circuit that measures a user electrocardiographic waveform using electrodes, a peak detector that detects peaks of first and second R waves and at least one of peaks of P and Q waves, and an acquirer. The acquirer expands/contracts a time interval between the peaks of the first and second R waves to a first time period and further (i) expands/contracts a time interval between the peaks of the first R wave and P wave to a second time period, (ii) expands/contracts a time interval between the peaks of the first R wave and Q wave to a third time period, or (iii) expands/contracts the time interval between the peaks of the first R wave and P wave to the second time period and expands/contracts the time interval between the peaks of the first R wave and Q wave to the third time period.

Abstract: A muscular fatigue determination apparatus includes an information obtaining unit that obtains loads applied to a pedal of a bicycle, rotation speeds of a crank of the bicycle, and myoelectric potentials of a user, the myoelectric potentials and the loads being in a one-to-one relationship, the myoelectric potentials and the rotation speeds being in a one-to-one relationship, and a muscular fatigue information generation unit that generates muscular fatigue information regarding the user on the basis of whether a difference between the myoelectric potentials of the user is larger than a first threshold, each of the myoelectric potentials being associated to a load range that is one of load ranges and to a rotation speed range that is one of rotation speed ranges, each of the loads belonging to one of the load ranges and each of the rotation speed ranges belonging to one of the rotation speed ranges.