Prof. Ja Choon Koo Profile

Prof. Ja Choon Koo

Manager at Sungkyunkwan Univ

SPIE Involvement:

Author

Publications (30)

Proceedings Article | 17 April 2017 Paper

Super stretchable soft actuator made of twisted and coiled spandex fiber

Kyeong Ho Cho, Min Geun Song, Sang Yul Yang, Youngeun Kim, Hosang Jung, Hyungpil Moon, Ja Choon Koo, Jae-Do Nam, Hyouk Ryeol Choi

Proceedings Volume 10163, 101630W (2017) https://doi.org/10.1117/12.2261611

KEYWORDS: Actuators, Polymers, Electrodes, Robotics, Polymeric actuators, Artificial muscles, Polyurethane, Control systems, Magnesium, Computer programming

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Proceedings Article | 12 April 2017 Paper

Development of a slip sensor using separable bilayer with Ecoflex-NBR film

Sung Joon Kim, Hyungpil Moon, Hyouk Ryeol Choi, Ja Choon Koo

Proceedings Volume 10168, 1016835 (2017) https://doi.org/10.1117/12.2258348

KEYWORDS: Sensors, Polymers, Electrodes, Capacitance, Dielectrics, Polymer thin films, Polymeric sensors, Smart materials, Sensor performance, Feedback control, Copper, Detector development

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Proceedings Article | 15 April 2016 Paper

Development of a biomimetic roughness sensor for tactile information with an elastomer

Jae-Young Choi, Sung Joon Kim, Hyungpil Moon, Hyouk Ryeol Choi, Ja Choon Koo

Proceedings Volume 9798, 979839 (2016) https://doi.org/10.1117/12.2220286

KEYWORDS: Sensors, Robots, Biomimetics, Natural surfaces, Surface roughness, Robotics, Silicon, Environmental sensing, Skin, Receptors

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Proceedings Article | 15 April 2016 Paper

A robotic finger driven by twisted and coiled polymer actuator

Kyeong Ho Cho, Min Geun Song, Hosang Jung, Jungwoo Park, Hyungpil Moon, Ja Choon Koo, Jae-Do Nam, Hyouk Ryeol Choi

Proceedings Volume 9798, 97981J (2016) https://doi.org/10.1117/12.2218957

KEYWORDS: Polymers, Actuators, Robotics, Polymeric actuators, Artificial muscles, Heat treatments, 3D printing, Biomimetics, Manufacturing, Electroactive polymers, Shape memory alloys, Aluminum

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Proceedings Article | 1 April 2015 Paper

Design and fabrication of stretchable proximity-tactile sensor using carbon micro coils

Junwoo Park, Tien Dat Nguyen, Uikyum Kim, Dong-Hyuk Lee, Canh Toan Nguyen, Hoa Phung, Jaedo Nam, Hyungpil Moon, Ja Choon Koo, Hyouk Ryeol Choi

Proceedings Volume 9430, 94302T (2015) https://doi.org/10.1117/12.2084790

KEYWORDS: Sensors, Electrodes, Silicon, Carbon, Prototyping, Robots, Liquids, Composites, Dielectrics, Resistance

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Proceedings Article | 1 April 2015 Paper

Development of compact slip detection sensor using dielectric elastomer

Jae-young Choi, Do-Yeon Hwang, Baek-chul Kim, Hyungpil Moon, Hyouk Ryeol Choi, Ja Choon Koo

Proceedings Volume 9430, 943010 (2015) https://doi.org/10.1117/12.2084475

KEYWORDS: Sensors, Resistance, Dielectrics, Semiconducting wafers, Robots, Graphene, Electrodes, Prototyping, Finite element methods, Manufacturing

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Proceedings Article | 10 April 2014 Paper

Development of microsized slip sensors using dielectric elastomer for incipient slippage

Do-Yeon Hwang, Baek-chul Kim, Han-Jeong Cho, Zhengyuan Li, Youngkwan Lee, Jae-Do Nam, Hyungpil Moon, Hyouk Ryeol Choi, J. C. Koo

Proceedings Volume 9061, 906128 (2014) https://doi.org/10.1117/12.2045218

KEYWORDS: Sensors, Resistance, Dielectrics, Semiconducting wafers, Electrodes, Particles, Skin, Coating, Graphene, Robotics

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Proceedings Article | 26 March 2014 Paper

Highly sensitive resistive type single-axis tactile sensor with liquid pocket

Seonggi Kim, Baek-chul Kim, Jiyeon Jung, Ja Choon Koo, Hyouk Ryeol Choi, Hyungpil Moon

Proceedings Volume 9056, 905612 (2014) https://doi.org/10.1117/12.2045007

KEYWORDS: Sensors, Liquids, Silicon, Electrodes, Ultraviolet radiation, Resistance, Metals, Gold, Solids, Positron emission tomography

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Proceedings Article | 26 March 2014 Paper

Highly sensitive proximity and tactile sensor based on composite with dielectric elastomer and carbon microcoils

Tien Nguyen, Junwoo Park, Choonghan Lee, Canh Nguyen, Dong-hyuk Lee, Uikyum Kim, Hoa Phung, Jae-do Nam, Ja Choon Koo, Hyungpil Moon, Hyouk Choi

Proceedings Volume 9056, 90561C (2014) https://doi.org/10.1117/12.2044631

KEYWORDS: Sensors, Dielectrics, Composites, Capacitance, Carbon, Electrodes, Additive manufacturing, Sensor performance, Inductance, Resistance

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Proceedings Article | 9 April 2013 Paper

Six-axis capacitive force/torque sensor based on dielectric elastomer

Daegyeong Kim, Choong Han Lee, Baek Chul Kim, Dong Hyuck Lee, Hyung Suk Lee, Canh Toan Nguyen, Ui Kyum Kim, Tien Dat Nguyen, Hyungpil Moon, Ja Choon Koo, Jae-do Nam, Hyouk Ryeol Choi

Proceedings Volume 8687, 86872J (2013) https://doi.org/10.1117/12.2009970

KEYWORDS: Sensors, Dielectrics, Capacitance, Calibration, Structural design, Robotics, Electrodes, Condition numbers, Prototyping, Data communications

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Proceedings Article | 9 April 2013 Paper

Development of a dual-axis hybrid-type tactile sensor using PET film

Kim Seonggi, Ja Choon Koo, Hyouk Ryeol Choi, Hyungpil Moon

Proceedings Volume 8687, 86872N (2013) https://doi.org/10.1117/12.2009569

KEYWORDS: Sensors, Electrodes, Positron emission tomography, Capacitance, Metals, Resistance, Dielectrics, Oxygen, Plasma treatment, Ultraviolet radiation

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Proceedings Article | 4 April 2012 Paper

Tactile display with rigid coupling

Hyung Seok Lee, Dong Hyuk Lee, Dea Gyeong Kim, Ui Kyum Kim, Choong Han Lee, Nguyen Ngoc Linh, Nguyen Canh Toan, Ja Choon Koo, Hyungpil Moon, Jae-do Nam, Jeongheon Han, Hyouk Ryeol Choi

Proceedings Volume 8340, 83400E (2012) https://doi.org/10.1117/12.915059

KEYWORDS: Actuators, Silicon, Electrodes, Haptic technology, Dielectrics, Dielectric elastomer actuators, Electroactive polymers, Prototyping, Adhesives, Interfaces

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Proceedings Article | 4 April 2012 Paper

Dual-axis hybrid tactile sensor

Seonggi Kim, Baek-chul Kim, Ja Choon Koo, Hyuok Ryeol Choi, Hyungpil Moon

Proceedings Volume 8340, 83402H (2012) https://doi.org/10.1117/12.915134

KEYWORDS: Sensors, Electrodes, Capacitance, Resistance, Polymeric sensors, Polymers, Dielectrics, Optical resolution, Robotics, Gold

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Proceedings Article | 29 March 2011 Paper

Biomimetic small scale variable focal length lens unit using synthetic elastomer actuators

Baek-chul Kim, Jinah Chung, Y. Lee, Jae-Do Nam, Hyungpil Moon, Hyouk Ryeol Choi, J. C. Koo

Proceedings Volume 7976, 79762Z (2011) https://doi.org/10.1117/12.880721

KEYWORDS: Actuators, Silicon, Biomimetics, Zoom lenses, Electroactive polymers, Optics manufacturing, Information technology, Polymeric actuators, Polymers, Eye

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Proceedings Article | 29 March 2011 Paper

A dual axis shear force film sensor for robotic tactile applications

Baek-Chul Kim, Seunghoon Shin, Jinah Chung, Y. Lee, Jae-Do Nam, Hyungpil Moon, Hyouk Ryeol Choi, J. C. Koo

Proceedings Volume 7976, 797628 (2011) https://doi.org/10.1117/12.880729

KEYWORDS: Sensors, Electrodes, Robotics, Capacitance, Data acquisition, Dielectrics, Receptors, Calibration, Silicon, Metals

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Proceedings Article | 29 March 2011 Paper

Transparent active skin

Hyeok-Yong Kwon, Kuang Jun An, Junmo Kang, Vuong Hong Phuc, Nguyen Canh Toan, Baek Chul Kim, Jin Ah Chung, Byung Hee Hong, Jaeboong Choi, Hyungpil Moon, Jachoon Koo, Jae-do Nam, Hyouk Ryeol Choi

Proceedings Volume 7976, 79760T (2011) https://doi.org/10.1117/12.880341

KEYWORDS: Graphene, Electrodes, Actuators, Skin, Dielectrics, Copper, Transparency, Chemical vapor deposition, Etching, Resistance

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Proceedings Article | 9 April 2010 Paper

Active skin as new haptic interface

Nguyen Huu Lam Vuong, Hyeok Yong Kwon, Nguyen Huu Chuc, Duksang Kim, Kuangjun An, Vuong Hong Phuc, Hyungpil Moon, Jachoon Koo, Youngkwan Lee, Jae-Do Nam, Hyouk Ryeol Choi

Proceedings Volume 7642, 76422M (2010) https://doi.org/10.1117/12.847230

KEYWORDS: Skin, Haptic technology, Sensors, Dielectrics, Interfaces, Electrodes, Silicon, Robotics, Transducers, Actuators

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Proceedings Article | 9 April 2010 Paper

Experimental study on behaviors of dielectric elastomer based on acrylonitrile butadiene rubber

Kuangjun An, Nguyen Huu Chuc, Hyeok Yong Kwon, Vuong Hong Phuc, Jachoon Koo, Youngkwan Lee, Jaedo Nam, Hyouk Ryeol Choi

Proceedings Volume 7642, 76420N (2010) https://doi.org/10.1117/12.847534

KEYWORDS: Dielectrics, Ferroelectric materials, Actuators, Error analysis, Diffractive optical elements, Barium, Electroactive polymers, Silicon, Factor analysis, Titanium dioxide

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Proceedings Article | 9 April 2010 Paper

A flexible fingertip tactile sensor

Duk Sang Kim, Nguyen Huu Chuc, Sung Moon Jin, Kuang Jun An, Vuong Hong Phuc, Jachoon Koo, Youngkwan Lee, Jae-Do Nam, Hyouk Ryeol Choi

Proceedings Volume 7642, 76420F (2010) https://doi.org/10.1117/12.847399

KEYWORDS: Sensors, Robots, Dielectrics, Capacitance, Electrodes, Silicon, Signal processing, Microcontrollers, Actuators, Aluminum

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Proceedings Article | 6 April 2009 Paper

Development of integrated tactile display devices

Hyouk Ryeol Choi, Ducksang Kim, Nguyen Huu Chuc, Nguyen Huu Lam Vuong, Jachoon Koo, Jae-Do Nam, Youngkwan Lee

Proceedings Volume 7287, 72871C (2009) https://doi.org/10.1117/12.816475

KEYWORDS: Actuators, Dielectrics, Human-machine interfaces, Polymers, Sensors, Virtual reality, Skin, Visualization, Manufacturing, Electrodes

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Proceedings Article | 10 April 2008 Paper

A dielectric elastomer actuator with self-sensing capability

Nguyen Huu Chuc, Doan Vu Thuy, Jonggil Park, Duksang Kim, Jachoon Koo, Youngkwan Lee, Jae-Do Nam, Hyouk Ryeol Choi

Proceedings Volume 6927, 69270V (2008) https://doi.org/10.1117/12.777900

KEYWORDS: Dielectrics, Actuators, Dielectric elastomer actuators, Capacitance, Resistance, Sensors, Electrodes, Resistors, Phase shifts, Electroactive polymers

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Proceedings Article | 10 April 2008 Paper

Development of a dry actuation conducting polymer actuator for micro-optical zoom lenses

Baek-Chul Kim, Hyunseok Kim, H. C. Nguyen, M. S. Cho, Y. Lee, Jae-Do Nam, Hyouk Ryeol Choi, J. C. Koo, H.-S. Jeong

Proceedings Volume 6927, 69271M (2008) https://doi.org/10.1117/12.778298

KEYWORDS: Actuators, Polymers, Polymeric actuators, Zoom lenses, Liquids, Electroactive polymers, Optics manufacturing, Electrodes, Polymer thin films, Information technology

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Proceedings Article | 5 April 2007 Paper

Development of dielectric elastomer driven micro-optical zoom lens system

Hyunseok Kim, Jongkil Park, Nguyen Huu Chuc, H. R. Choi, J. D. Nam, Y. Lee, H. S. Jung, J. C. Koo

Proceedings Volume 6524, 65241V (2007) https://doi.org/10.1117/12.716872

KEYWORDS: Actuators, Prototyping, Zoom lenses, Dielectrics, Electroactive polymers, Cameras, Electromechanical design, Digital cameras, Imaging systems, Information technology

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Proceedings Article | 5 April 2007 Paper

Linear artificial muscle actuator based on synthetic elastomer

Nguyen Huu Chuc, JongKil Park, Doan Vu Thuy, Hyun Seok Kim, Jachoon Koo, Youngkwan Lee, JaeDo Nam, Hyouk Ryeol Choi

Proceedings Volume 6524, 65240J (2007) https://doi.org/10.1117/12.714926

KEYWORDS: Actuators, Electrodes, Dielectrics, Manufacturing, Artificial muscles, Robotics, Polymers, Robots, Prototyping, Robotic systems

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Proceedings Article | 23 March 2006 Paper

Synthesis of new solid polymer electrolyte and actuator based on PEDOT/NBR/ionic liquid

M. S. Cho, H. J. Seo, J. D. Nam, H. R. Choi, J. C. Koo, Y. Lee

Proceedings Volume 6168, 61682E (2006) https://doi.org/10.1117/12.659166

KEYWORDS: Actuators, Liquids, Polymers, Polymeric actuators, Solids, Dielectrics, Polymer thin films, Polymerization, Composites, Ions

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Proceedings Article | 22 March 2006 Paper

Fabrication and characterization of linear motion dielectric elastomer actuators

Min Young Jung, Nguyen Huu Chuc, Jung Woo Kim, Ig Mo Koo, Kwang Mok Jung, Y. Lee, J. Nam, H. Choi, J. Koo

Proceedings Volume 6168, 616824 (2006) https://doi.org/10.1117/12.658145

KEYWORDS: Actuators, Dielectrics, Electrodes, Polymers, Dielectric elastomer actuators, Polymeric actuators, Robotics, Artificial muscles, Electroactive polymers, Manufacturing

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Proceedings Article | 17 March 2006 Paper

Development of enhanced synthetic rubber for energy efficient polymer actuators

Kwangmok Jung, Jonghoon Lee, M. S. Cho, Ja Choon Koo, Jae-do Nam, Y. K. Lee, Hyouk Ryeol Choi

Proceedings Volume 6168, 61680N (2006) https://doi.org/10.1117/12.658149

KEYWORDS: Dielectrics, Actuators, Polymers, Capacitance, Dielectric elastomer actuators, Polymeric actuators, Artificial muscles, Silicon, Resistance, Electroactive polymers

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Proceedings Article | 6 May 2005 Paper

A solid state actuator based on polypyrrole (PPy) and a solid electrolyte NBR working in air

Misuk Cho, Jaedo Nam, Hyouk Ryeol Choi, Jachoon Koo, Youngkwan Lee

Proceedings Volume 5759, (2005) https://doi.org/10.1117/12.602275

KEYWORDS: Actuators, Polymers, Liquids, Polymeric actuators, Solids, Polymer thin films, Solid state physics, Ions, Electrodes, Switching

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Proceedings Article | 6 May 2005 Paper

Effects of prestrain on behavior of dielectric elastomer actuator

Hyouk Ryeol Choi, Kwangmok Jung, Nguyen Huu Chuc, Minyoung Jung, Igmo Koo, Jachoon Koo, Joonho Lee, Jonghoon Lee, Jaedo Nam, Misuk Cho, Youngkwan Lee

Proceedings Volume 5759, (2005) https://doi.org/10.1117/12.599363

KEYWORDS: Dielectrics, Actuators, Dielectric elastomer actuators, Electrodes, Polymers, Electroactive polymers, Polymeric actuators, Smart materials, Resistance, Physics

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Proceedings Article | 27 July 2004 Paper

Braille display device using soft actuator

Sangwon Lee, Kwangmok Jung, Jachoon Koo, Sungil Lee, Hoogon Choi, Jaewook Jeon, Jaedo Nam, Hyoukryeol Choi

Proceedings Volume 5385, (2004) https://doi.org/10.1117/12.539739

KEYWORDS: Actuators, Visualization, Dielectrics, Polymers, Manufacturing, Tablets, Information visualization, Skin, Polymeric actuators, Silicon

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Showing 5 of 30 publications

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