Abstract: A pulse wave detection method includes obtaining an image obtained by photographing a subject with an imaging device, extracting intensities representative of signal components of a specific frequency band for respective wavelength components among signals of a plurality of wavelength components included in the image, calculating, using the intensities extracted for the respective wavelength components, a weight coefficient by which a signal is multiplied when the signals are calculated between the wavelength components to minimize an arithmetic value of the signal components in the specific frequency band after multiplication, multiplying at least one of the signals of the respective wavelength components by the weight coefficient, performing arithmetic operation on the signals between the wavelength components after multiplication by the weight coefficient, and detecting pulse waves of the subject using a signal after the arithmetic operation.

Abstract: An information processing method executed by a processor included in an information processing apparatus coupled to a sensor, the method includes acquiring information on a living body from the sensor; estimating, by using estimation models, indices other than one unknown index among three indices including an index being related to a feature of a change with time of a biological response signal value derived from a meal after completion of the meal, an index regarding energy consumed by the living body in a time period, and an index regarding a change in an amount of energy stored in the living body in the time period, based on the acquired information; estimating the one unknown index based on a relation satisfied by the three indices and a result of the estimating indices; and generating at least one of model parameters of the estimation models based on the estimated three indices.

Abstract: A pulse wave detection apparatus detects a signal, and calculates a correlation coefficient between waveforms of the signal included in a first window and a second window having a predetermined duration, the correlation coefficient being smaller when a difference between dispersion of the amplitude value in the first window and dispersion of the amplitude value in the second window becomes larger.

Abstract: An information processing device configured to communicate with a plurality of mobile terminals, the information processing device includes a memory and a processor coupled to the memory and configured to acquire, from the plurality of mobile terminals, information related to movements of the plurality of mobile terminals, identify, based on the information, movement patterns of the plurality of mobile terminals, identify, based on the movement patterns, a queue including at least two mobile terminals of the plurality of mobile terminals, identify, based on the information of the mobile terminals included in the queue, a waiting time that elapses before a first mobile terminal that is one of the plurality of mobile terminals and that is included in the queue reaches a head of the queue, and output the identified waiting time.

Abstract: A subject person specifying apparatus includes a processor, and a memory storing a program causing the processor to perform acquiring characteristic quantities of variations of heart rate related to a meal of a subject person from heart rate data of the subject person as a target of an individual specifying process, calculating a distribution range of history values of the characteristic quantities associated with a plurality of candidates, and extracting the candidate corresponding to the subject person from within the plurality of candidates, based on a relation between the characteristic quantities acquired from the subject person and the distribution range of the history values of the characteristic quantities.

Abstract: A non-transitory recording medium storing a correlation determination program for causing a computer to execute a process including calculating a time interval between an occurrence time of one of first type events and an occurrence time of each of second type events based on information including the occurrence times of the first type events and the second type events, for each of the first type events; comparing, for each of ranges of values relating to the time interval, a first rate of the number of time intervals within the range among a set of time intervals to a size of the range and a second rate of the number of time intervals outside the range among the set to a size of a range obtained by excluding the range from the predetermined time; and determining presence or absence of a correlation between the first type and second type events.

Abstract: A non-transitory computer-readable recording medium stores a meal estimation program that causes a computer to execute a process including: acquiring time-series data of heart rate; calculating a feature quantity relating to a second peak appearing after a first peak in which a peak of the heart rate appears first after start of a meal, for each partial data included in the time-series data of the heart rate; determining presence of a meal in the partial data using the feature quantity relating to the second peak calculated for each of the partial data; and estimating a meal time from the partial data determined to include a meal.

Abstract: An information processing device configured to communicate with a plurality of mobile terminals, the information processing device includes a memory and a processor coupled to the memory and configured to acquire, from the plurality of mobile terminals, information related to movements of the plurality of mobile terminals, identify, based on the information, movement patterns of the plurality of mobile terminals, identify, based on the movement patterns, a queue including at least two mobile terminals of the plurality of mobile terminals, identify, based on the information of the mobile terminals included in the queue, a waiting time that elapses before a first mobile terminal that is one of the plurality of mobile terminals and that is included in the queue reaches a head of the queue, and output the identified waiting time.

Abstract: A pulse-wave detection device acquires an image. Furthermore, the pulse-wave detection device executes face detection on the image. Furthermore, the pulse-wave detection device sets the identical region of interest in the frame, of which the image is acquired, and the previous frame to the frame in accordance with a result of the face detection. Moreover, the pulse-wave detection device detects a pulse wave signal based on a difference in brightness obtained between the frame and the previous frame.

Abstract: A pulse wave detection device acquires an image. The pulse wave detection device extracts a living body region included in the image. The pulse wave detection device generates a signal from time series data of a pixel value included in a partial image of the image corresponding to the living body region. The pulse wave detection device calculates a variation index for evaluating a degree of disturbance of a pulse wave included in the signal. The pulse wave detection device controls whether to output the signal by using the variation index.

Abstract: A specifying method includes specifying a first period for which it is determined that a specific movement or a specific posture is being performed by applying a first threshold to time series data obtained from a sensor for detecting a movement of a person, specifying a second period for which it is determined that the specific movement or the specific posture is being performed by applying a second threshold to the time series data, the second threshold being eased compared to the first threshold, specifying a transitional period based on a difference between the second period and the first period, the transitional period corresponding to one of a period of a transition to the specific movement or the specific posture, and another period of another transition from the specific movement or the specific posture to another movement or another posture and outputting a result.

Abstract: A subject person specifying apparatus includes a processor, and a memory storing a program causing the processor to perform acquiring characteristic quantities of variations of heart rate related to a meal of a subject person from heart rate data of the subject person as a target of an individual specifying process, calculating a distribution range of history values of the characteristic quantities associated with a plurality of candidates, and extracting the candidate corresponding to the subject person from within the plurality of candidates, based on a relation between the characteristic quantities acquired from the subject person and the distribution range of the history values of the characteristic quantities.

Abstract: A blood flow index calculating method includes: obtaining, by a camera, an image capturing a first site of a living body and a second site of the living body; extracting an area of the first site of the living body and an area of the second site of the living body, by a processor; detecting a pulse wave pattern of the first site of the living body from the area of the first site of the living body and detecting a pulse wave pattern of the second site of the living body from the area of the second site of the living body, by the processor; first calculating a delay amount from the pulse wave pattern of the first site and the pulse wave pattern of the second site, by the processor; and second calculating an index related to blood flow by using the delay amount, by the processor.

Abstract: A pulse wave detection method includes obtaining an image obtained by photographing a subject with an imaging device, extracting intensities representative of signal components of a specific frequency band for respective wavelength components among signals of a plurality of wavelength components included in the image, calculating, using the intensities extracted for the respective wavelength components, a weight coefficient by which a signal is multiplied when the signals are calculated between the wavelength components to minimize an arithmetic value of the signal components in the specific frequency band after multiplication, multiplying at least one of the signals of the respective wavelength components by the weight coefficient, performing arithmetic operation on the signals between the wavelength components after multiplication by the weight coefficient, and detecting pulse waves of the subject using a signal after the arithmetic operation.

Abstract: A handheld terminal includes an electrocardiographic-signal dividing module that divides a biosignal into waveforms of a fixed interval, an R-R interval calculating module that calculates a plurality of R-R intervals indicative of an interval between adjacent R-waves and calculates an average value of the calculated R-R intervals for each of the waveforms of the fixed interval divided, and a candidate-waveform selecting module that selects a plurality of waveforms of a fixed interval corresponding to average values indicating near a maximum value of frequency of average values using the average value of the R-R intervals calculated for each of the waveforms of the fixed interval calculated, and thus highly accurate representative waveform data can be generated.

Abstract: A pulse wave detection apparatus detects a signal, and calculates a correlation coefficient between waveforms of the signal included in a first window and a second window having a predetermined duration, the correlation coefficient being smaller when a difference between dispersion of the amplitude value in the first window and dispersion of the amplitude value in the second window becomes larger.

Abstract: A terminal of an environment management station that calculates an evaluation value of a user terminal security, the evaluation value being used to determine whether to provide a service from a service provider to the user terminal, the terminal of the environment management station set in a third-party organization and stores environment information about to identify software or hardware that can be incorporated in the user terminal or hardware that can be connected to the user terminal, and the evaluation value of the user terminal in association with each other; a receiving unit that receives the environment information of the user terminal; an evaluation value calculating unit that calculates the evaluation value of the user terminal based on the evaluation value; and a transmitting unit that transmits the evaluation value to the terminal of the service provider.

Abstract: When changes occur in an environment of the service user terminal, a network operator terminal acquires hashed environment information indicative of the changes from the service user terminal. The network operator terminal sends the hashed environment information to an environment management authority terminal. The environment management authority terminal calculates an evaluation value based on the hashed environment information and transmits the evaluation value to a network operator terminal. The network operator terminal transmits status change information to the service provider terminal. The service provider terminal updates information about the user information previously stored and decides whether to provide the service to the service user terminal based on the updated information.

Abstract: A method of evaluating a magnetic recording medium using a magnetic head having a reproduction element is disclosed The method includes the steps of (a) recording a signal in a predetermined area of the magnetic recording medium; (b) determining a first value of a reproduction output by reproducing the predetermined area of the magnetic recording medium; (c) determining a second value of the reproduction output by emitting an energy line having a power of a predetermined value onto the predetermined area and reproducing the predetermined area with the reproduction element during or after the emission of the energy line; and (d) calculating a change in the reproduction output due to the emission of the energy line based on the first value and the second value of the reproduction output.

Abstract: An apparatus, system and method for magnetic recording are disclosed. In at least one embodiment, the apparatus includes a first portion of a first magnetic medium having a first cross-sectional area, and a second portion of a second magnetic medium having a second cross-sectional area. The first and second portions are joined by way of a junction that allows for at least some ferromagnetic coupling therebetween. Additionally, the first and second cross-sectional areas are of differing extent in a first dimension so that a first ledge portion of one of the first and second portions extends past a first edge of the other of the first and second portions.