Abstract: A probe for use in photoplethysmographic (PPG) measurement includes a light source unit including a light source that contacts a predetermined site of an object and emits light onto the predetermined site, a photodetector unit positioned facing the light source unit to receive the light emitted from the light source unit and transmitted through the object, a body having a space for receiving the object and in which the light source unit and the photodetector unit are positioned in a same optical axis, and a pressure application unit coupled to the body for applying a pressure to the object via the light source unit. A biological signal measuring system includes the above probe, a controller for controlling operations of the probe and for recording and analyzing signals output from the probe, a detected light intensity display unit for displaying an intensity of detected light, and a biological signal display unit.

Abstract: Disclosed herein is a shock absorber capable of controlling damping force characteristics. The shock absorber includes a cylinder filled with an operating fluid, a piston valve disposed inside the cylinder to divide an interior of the cylinder into a first chamber and a second chamber, a piston rod having one end extending outside the cylinder and the other end coupled to the piston valve inside the cylinder, a hollow chamber formed inside the piston rod to communicate with the first and second chambers, a free piston disposed within the hollow chamber to move up and down and to divide the hollow chamber into upper and lower chambers, and a variable part configured to control the damping force characteristics by adjusting a vertical displacement of the free piston.

Abstract: A non-invasive probe for measuring body components, and a non-invasive body component measurement system including the non-invasive probe is provided. The non-invasive probe includes an input light transferring unit for transferring an input light emitted from a light source; a light splitting unit for splitting the input light into a plurality of living body incident lights; a light condensing unit for condensing the plurality of living body incident lights, so that the plurality of living body incident lights can be irradiated onto a plurality of measuring points, each measuring point corresponding to one of the plurality of living body incident lights; and an output light transferring unit for transferring a plurality of output lights, which each correspond to the one of the plurality of measuring points and, which are obtained by irradiating the plurality of living body incident lights, to a spectrometer that classifies the output lights by wavelength.

Abstract: An apparatus to measure skin moisture content, the apparatus including: an electrode unit comprising a reference (R) electrode, a current (C) electrode, and a measuring (M) electrode; an operational amplifier having an inverting input terminal connect with the R electrode, and having an output terminal connect with the C electrode; a first switch connecting the R electrode and the C electrode, and releasing a connection between the R electrode and the C electrode when the electrode unit contacts with the skin of a user; and a microcontroller controlling the connection between the R electrode and the C electrode via the first switch is provided.

Abstract: An apparatus for providing skin care information, the apparatus including: an electrode unit supplying a voltage to a user's skin and detecting a current signal in the user's skin; a measurement control unit measuring the user's skin moisture content and sweat gland activity by using the detected current signal; a data calculation unit deriving skin moisture content information by using the skin moisture content and the sweat gland activity, and generating skin care information corresponding to the skin moisture content information; and an information provider providing the user with the generated skin care information is provided.

Abstract: An apparatus for measuring skin moisture content, the apparatus including: an electrode unit comprising a reference (R) electrode, a current (C) electrode, and a measuring (M) electrode; an operational amplifier including an inverting input terminal that is supplied to a first voltage and connects with the R electrode, and an output terminal that connects with the C electrode; a switch controlling a connection between the output terminal and the C electrode; and a comparison control unit comparing the first voltage with a voltage at the output terminal, and controlling the switch to connect the output terminal and the C electrode when the voltage at the output terminal is less than or equal to a value that is acquired by multiplying the first voltage and a predetermined constant.

Abstract: An apparatus for measuring skin moisture content in a user's skin is provided. The apparatus may include a signal supplier to generate an out-of-phase signal from a voltage signal obtained from the user's skin and an in-phase signal from the voltage signal, a susceptance measurement unit to measure the susceptance of the voltage signal by synchronizing the voltage signal and the out-of-phase signal received from the signal supplier, a conductance measurement unit to measure the conductance of the voltage signal by synchronizing the voltage signal and the in-phase signal, and an output unit to output sweat gland activity information of the user based on the measured conductance and skin moisture content information of the user based on the measured susceptance.

Abstract: A method and an apparatus for outputting body information of a user. The method of outputting the body information of a user comprises: designating coordinate points of the body information according to first, second, and third body information on a three-dimensional coordinate having the first, second, and third coordinates as coordinate axes; and outputting comparison information between the user body figure and the average body figure from the distance between the coordinate point of the body information of the average body figure designated on a three-dimensional coordinate in advance and the coordinate point of the body information of the user.

Abstract: A method of estimating stress caused by an exercise includes receiving questionnaire data including body measurements from a user, measuring health measurement data, deducing an exercise target and an exercise prescription based on the received and measured data, and transmitting the exercise target and exercise prescription to the user. The questionnaire data is then received back from the user, including the body measurements from the user and measuring again the health measurements data.; Parameters are designed based on the received and re-received questionnaire data and the measured and re-measured health measurement data and the parameters are converted to predetermined values. A regression analysis model is designed for estimating the exercise stress using the parameters and performing regression analysis and the exercise stress estimated through the regression analysis is transmitted to the user.

Abstract: An objective management apparatus, medium, and method with group organization that can efficiently manage a degree of objective achievement by effectively organizing a group and giving rise to competition among group members of a group or among groups. The objective management apparatus may include a plurality of communication terminals receiving objective data including personal objectives of a plurality of users and actual result data which are results of the users' execution for achieving the personal objectives, and an objective management server connected to the plurality of communication terminals through a network and supplied with the objective data and the actual result data.

Abstract: A diagnosis method and apparatus for measuring blood hemoglobin concentration, oxygen saturation, pulse rate, respiration rate, or degree of aging of blood vessels using light includes an input/output unit for receiving a command for measurement from a user and for providing information on the result of a measurement to the user; a control unit for receiving the command for measurement from the input/output unit and for generating a control signal; a light generating unit for generating at least two light beams for measurement according to the control signal; a light receiving unit for receiving the light beams transmitted through an object that is subject to measurement and for converting the received light beams into electrical signals; and a data processing unit for processing the electrical signals received from the light receiving unit and for outputting information on the result of a predetermined measurement.

Abstract: An apparatus and method for simultaneously measuring at least two different bio signals without interference are provided. The apparatus includes a stimulus signal generating unit generating the stimulus signal to be applied to a human body, a sensing unit contacting the human body, including a plurality of electrodes to which the stimulus signal is applied and from which at least one intermediate signal containing the first and second bio signals is detected, configured to share at least one of the plurality of electrodes to apply the stimulus signal or to detect each intermediate signal, and a signal acquisition unit separating and acquiring the first and second bio signals from each intermediate signal detected from the sensing unit.

Abstract: A probe for use in photoplethysmographic (PPG) measurement includes a light source unit including a light source that contacts a predetermined site of an object and emits light onto the predetermined site, a photodetector unit positioned facing the light source unit to receive the light emitted from the light source unit and transmitted through the object, a body having a space for receiving the object and in which the light source unit and the photodetector unit are positioned in a same optical axis, and a pressure application unit coupled to the body for applying a pressure to the object via the light source unit. A biological signal measuring system includes the above probe, a controller for controlling operations of the probe and for recording and analyzing signals output from the probe, a detected light intensity display unit for displaying an intensity of detected light, and a biological signal display unit.

Abstract: A diagnosis method and apparatus for measuring blood hemoglobin concentration, oxygen saturation, pulse rate, respiration rate, or degree of aging of blood vessels using light includes an input/output unit for receiving a command for measurement from a user and for providing information on the result of a measurement to the user; a control unit for receiving the command for measurement from the input/output unit and for generating a control signal; a light generating unit for generating at least two light beams for measurement according to the control signal; a light receiving unit for receiving the light beams transmitted through an object that is subject to measurement and for converting the received light beams into electrical signals; and a data processing unit for processing the electrical signals received from the light receiving unit and for outputting information on the result of a predetermined measurement.

Abstract: A laser handpiece using an optical system such as a prism. The laser handpiece includes a laser fiber for irradiating laser beam output from a laser generating device, a first beam path changing portion for changing a traveling path of the laser beam output from the laser fiber, a second beam path changing portion for changing finally the traveling path of the laser beam output from the first beam path changing portion, a focus lens for focusing the laser beam output from the second beam path changing portion onto a point, and a main body for containing the laser fiber, the first beam path changing portion, the second beam path changing portion and the focus lens. Thus, an optical axis can be easily aligned and the traveling path of the laser beam can be easily changed within a small space, so the laser handpiece can be manufactured in a convenient shape for use.

Abstract: An optimal diagnosis point detector for noninvasive diagnosis of blood constituents and a noninvasive diagnosis device using the same.