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Array of Touch Sensor: Elimination of Shadowing-Effect for Robotic Applications |
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Tuan Anh Luong, Hyungpil Moon, Sungwon Seo, June-Sup Yi(Sungkyunkwan University, Korea), Seonggi Kim(Korea Institute of Machinery and Materials, Korea) |
| Shadowing effect is common for scanning arrays of switch-like electronics in an array configuration such as touch sensors or keyboards. The formation of electric connection through unexpected paths in the sensor array causes such a malfunction. In this work, we present a design of touch sensor array which eliminates the shadowing effect by introducing a low conductivity layer at each contact node. Experimental results that verify the performance of the shadowing effect elimination and measurement of multiple contact locations are also presented. |
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Computational Modeling of Actin Network Organization under Mechanical Flow |
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Byungjun Kang, Seunghan Jo, Hyungsuk Lee(Yonsei University, Korea) |
| Actin, one of the cytoskeletal proteins, forms complex networks of proteins which support the structure of cells. In vitro studies about the mechanism of the actin network formation revealed that various factors such as pH or temperature control the structural characteristics of the system. However, the mechanism how the cell organizes heterogeneous actin structures, which are commonly found in cells in vivo by the functional demands remains unclear. The fact that cellular functions including migration and contraction induce the intracellular flow indicates that the heterogeneity in actin arch |
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Position Control of Thermistor-embedded Twisted and Coiled Polymer Actuator |
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Kyeong Ho Cho, Min Geun Song, Hosang Jung, Sang Yul Yang, Hyouk Ryeol Choi(Sungkyunkwan University, Korea) |
| Twisted and coiled polymer actuator (TCA) is fabricated from fishing lines or sewing thread by twist-insertion. It is cheap, light, quiet and flexible. Because it generates large strain and strong force, TCA has been revealed as a promising artificial muscle actuator. This paper introduces a thermistor-embedded TCA. Through temperature information measured from a thermistor, it was possible to control the temperature of the actuator. Furthermore, the position control of a thermistor-embedded TCA was successfully conducted with TCA evaluation unit. |
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Efficient Cooling of Thermally-Actuated Soft Actuators Using Carbon Nanocomposites |
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Chengxu Piao, Kyeong Ho Cho, Min Geun Song, Vishakha Kaushik, Hyouk Ryeol Choi, Ji Won Suk(Sungkyunkwan University, Korea) |
| The performance of polymer actuators which actuated by heating and cooling is limited by the heating and cooling rate. In this work, polymer nanocomposite with carbon nanomaterials was used to improve the cooling rate of the soft actuators. The actuators were prepared by twisting nylon fishing lines and forming coils. The super-coiled nylon-based actuators were simply coated with polydimethylsiloxane which was mixed with graphite nanoplatelets. As a result, the cooling time of the actuators were reduced by about 40% without any other external cooling methods. |
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Fabrication of High-resolution Bridge-like 3D Interconnects using Electrohydrodynamic Inkjet Printing |
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Byeong Wan An, Jang-Ung Park(UNIST, Korea) |
| As electronics are moving toward highly integrated and complex hierarchical forms, the development of high-resolution packaging and metallization technologies becomes an important research topic. Conventional techniques, however, still present challenges in providing high-resolution features or reducing multiple process steps. Here, we demonstrate the direct fabrication of high-resolution bridge-like 3D interconnects using electrohydrodynamic inkjet (e-jet) printing technology. E-jet printing, which can use small nozzles to reduce droplet sizes by exploiting an electric field for ejectin |
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Biomimetic Skin-type Shear Sensor |
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Seonggi Kim, Cho-long Jung, Youngdo Jung(Korea Institute of Machinery and Materials, Korea), Hyungpil Moon(Sungkyunkwan University, Korea), Hyuneui Lim(Korea Institute of Machinery and Materials, Korea) |
| Human detects the external tactile stimulation using mechanoreceptors under the skin. There are various kinds of mechanoreceptors in the skin. In this paper, the proposed sensor mimics Ruffini`s corpuscle which detects shear force. The sensor consists of Ecoflex® 0050 as a substrate and silver nanowire (AgNW) in the shape of typical strain gauge as a sensing element. The Ecoflex® 0050 was chosen as its elastic modulus is similar to that of human dermis. The sensing element is embedded in the substrate vertically for detecting shear force directly. The characterization of the sensor was carried |
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