Chung Ang University Industry Academic Cooperation

Korea Aerospace Research Institute

Ji Hun Bae

Seung Hwan Chang

Sang-kyoo Han

Jae Dong Choi

Jung Un Park

Nayoung Lee

Ja-Chun Koo

According to the present invention, an output inductor, rather than being composed of a separate inductor element, is magnetically coupled to a third inductor and a fourth inductor constituting a second transformer. Thus, compared to the case in which the output inductor is composed of the separate inductor element independently of the third inductor and the fourth inductor, the cost as well as the volume of the DC-DC conversion device can be reduced.

DC-DC conversion device having coupling inductor

Techniques for providing in vivo environments to in vitro cells by periodically applying mechanical stimuli to in vitro cells are provided for effective studies on cell culture. A first embodiment of the present invention provides a cell culture apparatus including: a first layer including an electroactive polymer material and elongated in at least one direction by external force applied thereto; a first fixing part fixing both ends of the first layer in the direction in which the first layer is elongated, so as to maintain the elongation of the first layer; a second layer including the electroactive polymer material and spaced apart from a surface of the first layer, the second layer being elongated in at least one direction by external force applied thereto; a second fixing part fixing both ends of the second layer in the direction in which the second layer is elongated, so as to maintain the elongation of the second layer; a first electrode part applied to a region of the first layer; and a second electrode part applied to a region of the second layer, wherein the second layer is provided in such a manner that a cell to be cultured is sandwiched between the surface of the first layer and a surface of the second layer.

Cell culture apparatus

Provided is a technique related to a new sensor unit which is flexible in that the sensor unit can be installed in various locations such as inside of a structure with a large curvature, and which can stably measure multi-directional deformation and very efficiently and wireless measure deformation information, and thus provided is a technique of a sensor structure which can be universally utilized in various systems for measuring deformation information. The sensor unit using an electro-active polymer for the wireless transmission/reception of deformation information, according to a first embodiment of the present invention, comprises: a first sensor part formed from a fiber or film comprising a ferroelectric electro-active polymer material; a second sensor part configured to include the first sensor part therein, and formed from a matrix comprising a dielectric elastomer electro-active polymer material; and an electrode part provided to come into contact with the first sensor part or the second sensor part and, when an external force is applied to the first sensor part or the second sensor part, transmits to the outside an electric signal generated by the first sensor part or the second sensor part.

Sensor unit using electro-active polymer for wireless transmission/reception of deformation information, and sensor using same

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Seoul, South Korea

Ji Hun Bae