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| WoS | SCOPUS | Document Type | Document Title | Abstract | Authors | Affiliation | ResearcherID (WoS) | AuthorsID (SCOPUS) | Author Email(s) | Journal Name | JCR Abbreviation | ISSN | eISSN | Volume | Issue | WoS Edition | WoS Category | JCR Year | IF | JCR (%) | FWCI | FWCI Update Date | WoS Citation | SCOPUS Citation | Keywords (WoS) | KeywordsPlus (WoS) | Keywords (SCOPUS) | KeywordsPlus (SCOPUS) | Language | Publication Stage | Publication Year | Publication Date | DOI | JCR Link | DOI Link | WOS Link | SCOPUS Link |
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| ○ | ○ | Article | Design and Validation of Low-Power Secure and Dependable Elliptic Curve Cryptosystem | The elliptic curve cryptosystem (ECC) has been proven to be vulnerable to non-invasive side-channel analysis attacks, such as timing, power, visible light, electromagnetic emanation, and acoustic analysis attacks. In ECC, the scalar multiplication component is considered to be highly susceptible to side-channel attacks (SCAs) because it consumes the most power and leaks the most information. In this work, we design a robust asynchronous circuit for scalar multiplication that is resistant to state-of-the-art timing, power, and fault analysis attacks. We leverage the genetic algorithm with multi-objective fitness function to generate a standard Boolean logic-based combinational circuit for scalar multiplication. We transform this circuit into a multi-threshold dual-spacer dual-rail delay-insensitive logic ((MTDL)-L-3) circuit. We then design point-addition and point-doubling circuits using the same procedure. Finally, we integrate these components together into a complete secure and dependable ECC processor. We design and validate the ECC processor using Xilinx ISE 14.7 and implement it in a Xilinx Kintex-7 field-programmable gate array (FPGA). | Poudel, Bikash; Munir, Arslan; Kong, Joonho; Khan, Muazzam A. | Intel Corp, Santa Clara, CA 95052 USA; Kansas State Univ, Dept Comp Sci, Manhattan, KS 66506 USA; Kyungpook Natl Univ, Sch Elect Engn, Daegu, South Korea; Quaid I Azam Univ, Dept Comp Sci, Islamabad 15320, Pakistan | A. Khan, Dr. Muazzam/AAF-1494-2020 | 57256172200; 24587067400; 25927220400; 57202773102 | bikash.poudel@intel.com;amunir@ksu.edu;joonho.kong@knu.ac.kr;muazzam.khattak@qau.edu.pk; | JOURNAL OF LOW POWER ELECTRONICS AND APPLICATIONS | J LOW POWER ELECT AP | 2079-9268 | 11 | 4 | ESCI | ENGINEERING, ELECTRICAL & ELECTRONIC | 2021 | N/A | 0 | 2025-07-30 | 0 | 0 | elliptic curve cryptography; hardware-based security; side-channel attacks; genetic algorithm; (MTDL)-L-3; FPGA | SIDE-CHANNEL ATTACK; COMBINATIONAL LOGIC | Elliptic curve cryptography; FPGA; Genetic algorithm; Hardware-based security; MTD<sup>3</sup> L; Side-channel attacks | English | 2021 | 2021-12 | 10.3390/jlpea11040043 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||||
| ○ | ○ | Proceedings Paper | Design of a Light-Weight Key Scheduler for AES using LFSR for IoT Applications | This paper presents a new light-weight key scheduler in AES using linear feedback shift register (LFSR). The conventional substitution-box (S-box) based key scheduler in the AES suffers from a considerable hardware resource consumption. To improve overall hardware efficiency, the proposed key scheduler exploits an LFSR based structure with XOR operation. The proposed design is implemented in a 32-nm CMOS technology, it is shown that our LFSR-based scheduler reduces area, delay, power, and energy by 53%, 56%, 12%, and 61%, respectively, compared to the S-box based counterpart. | Lee, Donghui; Kim, Yongtae | Kyungpook Natl Univ, Sch Comp Sci & Engn, Daegu, South Korea | 57266466900; 55699627900 | yongtae@knu.ac.kr; | 2021 IEEE INTERNATIONAL CONFERENCE ON CONSUMER ELECTRONICS-ASIA (ICCE-ASIA) | 0 | 2025-07-30 | 0 | 0 | Advanced Encryption Standard (AES); Key Scheduler; Linear Feedback Shift Register (LFSR) | Advanced Encryption Standard (AES); Key Scheduler; Linear Feedback Shift Register (LFSR) | Cryptography; Data privacy; Feedback; Internet of things; Scheduling; Advanced encryption standard; Hardware efficiency; Hardware resources; Key scheduler; Light weight; Linear feedback shift register; Linear feedback shift registers; Resources consumption; XOR operation; Shift registers | English | 2021 | 2021 | 10.1109/icce-asia53811.2021.9641878 | 바로가기 | 바로가기 | 바로가기 | ||||||||||||||
| ○ | Article | Design of a prosthetic finger for a patient with a partially amputated finger | This study proposed the design of a prosthetic finger that can perform functions, such as motion and gripping, without patients (with amputated fingers) needing an additional actuator. The contributions and contents of this study are as follows: First, the structure of a prosthetic finger, which could be operated by the patient’s own volition without an external actuator, was introduced. Second, the mathematical relationship for effectively designing the proposed structure was explained. In addition, by using this mathematical relationship, the trend of the fingertip trajectory, according to the link length and angle (the design variables) was analyzed. Through this analysis, an optimal design was achieved to determine the link length at which the root mean square error with the target trajectory was minimized. Third, a design method reflecting the finger size and anatomical structure was proposed. Finally, using the fabricated prototype, the proposed design was tested, and the prosthetic finger, having free motion and the ability to grip objects of various sizes, was experimentally verified. © ICROS 2021. | Koo, Jaewan; Park, Min-Ro; Yang, Kyon-Mo; Kim, Min-Gyu; Song, Min-Geol; Jang, Woong; Kim, Byung-Kon; Song, Jun-Chan; Lee, Joonwoo; Seo, Kap-Ho | Human-Robot Interaction Research Center, Korea Institute of Robotics and Technology Convergence (KIRO), South Korea, Dept. of Robot and Smart System Engineering, Kyungpook National University, South Korea; Human-Robot Interaction Research Center, Korea Institute of Robotics and Technology Convergence (KIRO), South Korea; Human-Robot Interaction Research Center, Korea Institute of Robotics and Technology Convergence (KIRO), South Korea; Human-Robot Interaction Research Center, Korea Institute of Robotics and Technology Convergence (KIRO), South Korea; GFLEE IN CO.Ltd., China; Dept. of Industrial Design, Daegu University, South Korea; Dept. of Physical Therapy, Daegu Health College, South Korea; Dept. of Physical Therapy, Daegu Health College, South Korea; Dept. of Robot and Smart System Engineering, Kyungpook National University, South Korea, Dept. of Electrical Engineering, Kyungpook National University, Daegu, 41566, South Korea, School of Electronic and Electrical Engineering, Kyungpook National University, Daegu, 41566, South Korea; Human-Robot Interaction Research Center, Korea Institute of Robotics and Technology Convergence (KIRO), South Korea, Dept. of Robot and Smart System Engineering, Kyungpook National University, South Korea, Dept. of Mechanical Engineering, Pohang University of Science and Technology (POSTECH), South Korea | 57217782518; 57188662021; 55698480000; 55551726700; 57295785500; 57295348200; 56125164100; 8660911600; 57209469100; 7201838999 | neoworld@kiro.re.kr; | Journal of Institute of Control, Robotics and Systems | 1976-5622 | 27 | 10 | 0.16 | 2025-07-30 | 2 | Partially amputated patient; Passive-driven; Prosthetic finger | Actuators; Artificial limbs; Design; Design variables; External actuators; Fingertip trajectory; Link length; Mathematical relationship; Optimal design; Partially amputated patient; Passive-driven; Prosthetic fingers; Root mean square errors; Mean square error | Korean | Final | 2021 | 10.5302/j.icros.2021.21.0085 | 바로가기 | 바로가기 | |||||||||||||||
| ○ | ○ | Proceedings Paper | Design of an Accuracy Enhanced Imprecise Adder with Half Adder-based Approximation | This paper proposes a new approximate adder that increases the accuracy of addition while ensuring acceptable hardware performance. The proposed adder implemented with a 32-nm CMOS technology reduces the area, power, and delay by 40%, 43%, and 50% of those of the traditional accurate adder, respectively. Moreover, the proposed adder shows a better tradeoff performance than the existing approximate adders considered in this paper when jointly evaluating both accuracy and hardware performance. Specifically, the proposed adder enhances power-mean relative error distance (MRED) product, energy-MRED product, and area-MRED product by up to 65%, 65%, and 64% compared to the approximate adder considered herein. | Seo, Hyoju; Lee, Jungwon; Seok, Hyelin; Kim, Yongtae | Kyungpook Natl Univ, Sch Comp Sci & Engn, Daegu 41566, South Korea | Seo, Hyoju/GSD-8672-2022 | 57215662369; 57219710729; 57237930600; 55699627900 | yongtae@knu.ac.kr; | 18TH INTERNATIONAL SOC DESIGN CONFERENCE 2021 (ISOCC 2021) | 2163-9612 | 0.2 | 2025-07-30 | 1 | 2 | approximate computing; approximate adder; low power; energy efficiency | approximate adder; approximate computing; energy efficiency; low power | Computing power; Electric power supplies to apparatus; Energy efficiency; Green computing; Approximate adder; Approximate computing; CMOS technology; Error distance; Half-adder; Hardware performance; Low Power; Mean relative error; Performance; Power; Adders | English | 2021 | 2021 | 10.1109/isocc53507.2021.9613888 | 바로가기 | 바로가기 | 바로가기 | ||||||||||||
| ○ | ○ | Article | Design of the broadband pattern of a cymbal transducer array | The cymbal transducer is a miniaturized version of the Class V flextensional transducer. It has low resonant frequency and high output pressure characteristics compared with its size. However, since it has high quality factor and low energy conversion efficiency as well, it is often used as an array rather than single. When used as an array, a big change in the frequency characteristics occurs in comparison with that of the single transducer due to the interaction between constituent transducers. In this study, we designed a pattern of cymbal array with a view to having broadband characteristics. Three transducers having different center frequencies were designed first. The designed cymbal transducers were used to construct all possible patterns of a 3 x 3 planar array. After analyzing frequency characteristics of these patterns, based on the results, we derived the most effective pattern to achieve a higher fractional bandwidth. The derived array pattern showed an improvement of the fractional bandwidth by 24.9 % in comparison with the reference model. | Kim, Donghyun; Oh, Changmin; Shim, Hayeong; Kang, Soonkwan; Roh, Yongrae | Kyungpook Natl Univ, Sch Mech Engn, 80 Daehakro, Daegu 41566, South Korea | 58950709000; 57218589504; 57202806954; 57223012655; 7102361870 | yryong@knu.ac.kr; | JOURNAL OF THE ACOUSTICAL SOCIETY OF KOREA | J ACOUST SOC KOREA | 1225-4428 | 2287-3775 | 40 | 1 | ESCI | ACOUSTICS | 2021 | N/A | 0.43 | 2025-07-30 | 4 | 4 | Cymbal transducer; Array pattern; Fractional bandwidth; Broadband | PROJECTOR | Array pattern; Broadband; Cymbal transducer; Fractional bandwidth | Korean | 2021 | 2021 | 10.7776/ask.2021.40.1.010 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||||
| ○ | Article | Detection and localization of partial discharge in high-voltage direct current cables using a high-frequency current transformer | Detection and localization of partial discharge are considered critical techniques for estimating the lifetimes of power cables. Highfrequency current transformers (HFCTs) are commonly used for the detection of partial discharge in high-voltage alternating current (HVAC) power cables; however, their applicability is compromised by the limitations of the installation locations. HFCTs are typically installed in cable terminals or insulation joint boxes because HVACs induce strong time-varying magnetic fields around the cables, saturating the ferromagnetic materials in the HFCTs. Therefore, partial discharges near the installation locations can be detected. In this study, the feasibility of partial discharge detection using a HFCT was investigated for high-voltage direct current (HVDC) cables. We demonstrated that the HFCT could be installed at any location in the HVDC power cable to monitor partial discharge along the entire cable length. Furthermore, we showed that the HFCT could detect the location of partial discharge with high accuracy. © 2021, Korean Sensors Society. All rights reserved. | Hong, Seonmin; Son, Wooyoung; Cheon, Hyewon; Kang, Daekyoung; Park, Jonghoo | Department of Electrical Engineering, Kyungpook National University, IT convergence Engineering Bldg 413, 80 Daehakro, Bukgu, Seoul, 41566, South Korea; Department of Electrical Engineering, Kyungpook National University, IT convergence Engineering Bldg 413, 80 Daehakro, Bukgu, Seoul, 41566, South Korea; Department of Electrical Engineering, Kyungpook National University, IT convergence Engineering Bldg 413, 80 Daehakro, Bukgu, Seoul, 41566, South Korea; Department of Biomedical convergence Science and Technology, Kyungpook National Unversity, Technopark, Kyungpook National University, 80 Daehakro, Bukgu, Seoul, 41566, South Korea; Department of Electrical Engineering, Kyungpook National University, IT convergence Engineering Bldg 413, 80 Daehakro, Bukgu, Seoul, 41566, South Korea | 58568870200; 58568870300; 58569304300; 58569191900; 57196408322 | jonghoopark@knu.ac.kr; | Journal of Sensor Science and Technology | 1225-5475 | 30 | 2 | 0 | 2025-07-30 | 0 | High frequency current transformer (HFCT); High-voltage direct current (HVDC) cable; Partial discharge | Korean | Final | 2021 | 10.46670/jsst.2021.30.2.105 | 바로가기 | 바로가기 | ||||||||||||||||
| ○ | Article | Detection of zebra-crossing areas based on deep learning with combination of segnet and resnet | This paper presents a method to detect zebra-crossing using deep learning which combines SegNet and ResNet. For the blind, a safe crossing system is important to know exactly where the zebra-crossings are. Zebracrossing detection by deep learning can be a good solution to this problem and robotic vision-based assistive technologies sprung up over the past few years, which focused on specific scene objects using monocular detectors. These traditional methods have achieved significant results with relatively long processing times, and enhanced the zebra-crossing perception to a large extent. However, running all detectors jointly incurs a long latency and becomes computationally prohibitive on wearable embedded systems. In this paper, we propose a model for fast and stable segmentation of zebra-crossing from captured images. The model is improved based on a combination of SegNet and ResNet and consists of three steps. First, the input image is subsampled to extract image features and the convolutional neural network of ResNet is modified to make it the new encoder. Second, through the SegNet original up-sampling network, the abstract features are restored to the original image size. Finally, the method classifies all pixels and calculates the accuracy of each pixel. The experimental results prove the efficiency of the modified semantic segmentation algorithm with a relatively high computing speed. © 2021 Korean Society of Surveying. All rights reserved. | Liang, Han; Seo, Suyoung | Dept. of Civil Engineering, Kyungpook National University; Dept. of Civil Engineering, Kyungpook National University | 57222620902; 35198914000 | syseo@knu.ac.kr; | Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography | 1598-4850 | 39 | 3 | 0.08 | 2025-07-30 | 2 | Deep Learning; Neural Network; Semantic Segmentation; Zebra-crossing Detection | artificial neural network; detection method; image analysis; image processing; machine learning; segmentation; semantic standardization | Korean | Final | 2021 | 10.7848/ksgpc.2021.39.3.141 | 바로가기 | 바로가기 | |||||||||||||||
| ○ | ○ | Article | Determination of 226Ra in TENORM Sample Considering Radon Leakage Correction | Background: Phosphogypsum is material produced as a byproduct in fertilizer industry and is generally used for building materials. This material may contain enhanced radium-226 (226Ra) activity concentration compared to its natural concentration that may lead to indoor radon ac-cumulation. Therefore, an accurate measurement method is proposed in this study to deter-mine 226Ra activity concentration in phosphogypsum sample, considering the potential radon leakage from the sample container.Materials and Methods: The International Atomic Energy Agency (IAEA) phosphogypsum reference material was used as a sample in this study. High-purity germanium (HPGe) gamma spectrometry was used to measure the activity concentration of the 226Ra decay products, i.e. , 214Bi and 214Pb. Marinelli beakers sealed with three different sealing methods were used as sam-ple containers. Due to the potential leakage of radon from the Marinelli beaker (MB), correc-tion to the activity concentration resulted in gamma spectrometry is needed. Therefore, the leaked fraction of radon escaped from the sample container was calculated and added to the gamma spectrometry measured values.Results and Discussion: Total activity concentration of226Ra was determined by summing up the activity concentration from gamma spectrometry measurement and calculated concentra-tion from radon leakage correction method. The results obtained from 214Bi peak were 723.4 +/- 4.0 Bq middot kg-1 in MB1 and 719.2 +/- 3.5 Bq middot kg-1 in MB2 that showed about 5% discrepan-cy compared to the certified activity. Besides, results obtained from 214Pb peak were 741.9 +/- 3.6 Bq middot kg-1 in MB1 and 740.1 +/- 3.4 Bq middot kg-1 in MB2 that showed about 2% difference compared to the certified activity measurement of226Ra concentration activity.Conclusion: The results show that radon leakage correction was calculated with insignificant discrepancy to the certified values and provided improvement to the gamma spectrometry. Therefore, measuring 226Ra activity concentration in TENORM (technologically enhanced nat-urally occurring radioactive material) sample using radon leakage correction can be concluded as a convenient and accurate method that can be easily conducted with simple calculation. | Lim, Sooyeon; Syam, Nur Syamsi; Maeng, Seongjin; Lee, Sang Hoon | Kyungpook Natl Univ, Sch Architectural Civil Environm & Energy Engn, Daegu, South Korea; Korea Hydro & Nucl Power Co Ltd, Cent Res Inst, Daejeon, South Korea; Badan Pengawas Tenaga Nukl BAPETEN, Directorate Licensing Nucl Installat & Mat, Jakarta, Indonesia; Kyungpook Natl Univ, Radiat Sci Res Inst, Daegu, South Korea; Badan Pengawas Tenaga Nukl BAPETEN, Directorate Licensing Nucl Installat & Mat, Jl Gajah Mada 8, Jakarta 10120, Indonesia | Maeng, Seongjin/JXW-7080-2024 | 57202037649; 57202036781; 56783843400; 56812964000 | n.syam@bapeten.go.id; | JOURNAL OF RADIATION PROTECTION AND RESEARCH | 2508-1888 | 2466-2461 | 46 | 3 | 0.49 | 2025-07-30 | 5 | 7 | TENORM; 226Ra; Radon Leakage Correction; HPGe Gamma Spectrometry | <sup>226</sup>Ra; HPGe gamma spectrometry; Radon leakage correction; TENORM | English | 2021 | 2021-09 | 10.14407/jrpr.2021.00087 | 바로가기 | 바로가기 | 바로가기 | ||||||||||
| ○ | ○ | Article | Determination of candesartan or olmesartan in hypertensive patient plasma using UPLC-MS/MS | Candesartan and olmesartan are angiotensin II receptor blockers (ARBs) used for the treatment of hypertension and heart failure. Quantitation methods for candesartan and olmesartan were developed using ultra-high performance liquid chromatography-tandem mass spectrometry following protein precipitation. Candesartan was separated using 5 mM ammonium formate (A) and 100% acetonitrile (B) and olmesartan was separated using 2 mM ammonium formate with 0.1% formic acid (A) and 100% acetonitrile (B). Separation was performed using an isocratic method with a Thermo hypersil GOLD C18 column. Electrospray ionization was used for analyte ionization and detection of candesartan, olmesartan, and the internal standards by multiple reaction monitoring. Developed method showed excellent linearity (r > 0.99) in the concentration range of 2-500 ng/mL for candesartan and 5-2,500 ng/mL for olmesartan. Accuracies were 86.70-108.8% for candesartan and 87.87-112.6% for olmesartan. These methods were able to successfully measure plasma candesartan or olmesartan concentrations in hypertensive patients. This study can be used for pharmacokinetic studies of candesartan or olmesartan in humans. | Jeong, Hyeon-Cheol; Seo, Yo-Han; Gu, Namyi; Rhee, Moo Yong; Shin, Kwang-Hee | Kyungpook Natl Univ, Coll Pharm, Res Inst Pharmaceut Sci, 80 Daehak Ro, Daegu 41566, South Korea; Dongguk Univ, Dept Clin Pharmacol & Therapeut, Coll Med, Goyang 10326, South Korea; Dongguk Univ, Ilsan Hosp, Goyang 10326, South Korea; Dongguk Univ, Cardiovasc Ctr, Ilsan Hosp, Goyang 10326, South Korea | 57196346934; 57223098219; 37016311700; 7102347634; 35216279300 | kshin@knu.ac.kr; | TRANSLATIONAL AND CLINICAL PHARMACOLOGY | 2289-0882 | 2383-5427 | 29 | 4 | 0.72 | 2025-07-30 | 9 | 8 | Candesartan; Olmesartan; Angiotensin II Receptor Blockers; Liquid Chromatography; Mass Spectrometry | HYDROCHLOROTHIAZIDE; EXTRACTION; MEDOXOMIL | Angiotensin II Receptor Blockers; Candesartan; Liquid Chromatography; Mass Spectrometry; Olmesartan | acetonitrile; ammonium formate; candesartan; olmesartan; analytic method; Article; blood sampling; calibration; chemical reaction; chemical structure; chromatography; concentration (parameter); dilution; drug determination; drug stability; electrospray; human; hypertension; hypertensive patient; isocratic method; limit of detection; limit of quantitation; liquid chromatography-mass spectrometry; matrix effect; measurement accuracy; measurement precision; multiple reaction monitoring; protein isolation; quality control; quantitative analysis; reproducibility; sensitivity analysis; validation process | English | 2021 | 2021-12 | 10.12793/tcp.2021.29.e21 | 바로가기 | 바로가기 | 바로가기 | |||||||||
| ○ | ○ | Article | Development and Application of Gene-Specific Markers for Tomato Yellow Leaf Curl Virus Resistance in Both Field and Artificial Infections | Tomato yellow leaf curl virus (TYLCV) is a disease that is damaging to tomato production worldwide. Resistance to TYLCV has been intensively investigated, and single resistance genes such as Ty-1 have been widely deployed in breeding programs. However, resistance-breaking incidences are frequently reported, and achieving durable resistance against TYLCV in the field is important. In this study, gene-specific markers for Ty-2 and ty-5, and closely-linked markers for Ty-4 were developed and applied to distinguish TYLCV resistance in various tomato genotypes. Quantitative infectivity assays using both natural infection in the field and artificial inoculation utilizing infectious TYLCV clones in a growth chamber were optimized and performed to investigate the individual and cumulative levels of resistance. We confirmed that Ty-2 could also be an effective source of resistance for TYLCV control, together with Ty-1. Improvement of resistance as a result of gene-pyramiding was speculated, and breeding lines including both Ty-1 and Ty-2 showed the strongest resistance in both field and artificial infections. | Lee, Jang Hee; Chung, Dae Jun; Lee, Je Min; Yeam, Inhwa | Kyungpook Natl Univ, Dept Hort Sci, Daegu 41566, South Korea; Andong Natl Univ, Dept Hort & Breeding, Andong 36729, South Korea | Lee, Je/AAE-7496-2020; Lee, Je Min/F-9797-2014 | 57221257562; 57221260189; 8885729900; 9733885400 | wkzz8282@gmail.com;quatez11@gmail.com;jemin@knu.ac.kr;iyeam@anu.ac.kr; | PLANTS-BASEL | 2223-7747 | 10 | 1 | 1.2 | 2025-07-30 | 10 | 13 | tomato; TYLCV; resistance gene; marker-assisted selection; gene-pyramiding | Gene-pyramiding; Marker-assisted selection; Resistance gene; Tomato; TYLCV | English | 2021 | 2021-01 | 10.3390/plants10010009 | 바로가기 | 바로가기 | 바로가기 | |||||||||||
| ○ | Article | Development and characterization of double-contact triboelectric nanogenerator with improved energy harvesting performance | A major goal of triboelectric generator is to improve its power output by identifying and optimizing the factors contributing to the harvesting capability. In this study, we developed a double-contact triboelectric nanogenerator (DC-TENG) capable of two contact and separation pairs by adding an additional air-gap layer. The voltage and current output was characterized as a function of the contact speed, position, stroke time (ST), standstill time (SST), and the existence of two air-gaps. The voltage and current output increased non-linearly with decreasing the times. The DC-TENG produced the maximum voltage and current output when the ratio of ST to SST was 7 to 3. Our prototype resembling a pavement block was capable of lighting 144 LED lights by producing a maximum output of 650 V, 25 μA at a pressure of 0.5 kgf/cm2. © 2021 Korean Society for Precision Engineeing. All rights reserved. | Kim, Giyong; Kim, Jinah; Javaid, Muhammad Usman; Cho, Hanchul; Kim, Sung Yeol; Park, Jinhyoung | Department of Mechanical Engineering, Kyungpook National University, South Korea; Department of Mechanical Engineering, Kyungpook National University, South Korea; Department of Mechanical Engineering, Kyungpook National University, South Korea; Precision Mechanical Process and Control RandD Group, Korea Institute of Industrial Technology, South Korea; Department of Mechanical Engineering, Kyungpook National University, South Korea; School of Mechatronics Engineering, Korea University of Technology and Education, South Korea | 57354461700; 57224547387; 57200118684; 24398481500; 19337822900; 57225161884 | sykimknu@knu.ac.kr;jhpark98@koreatech.ac.kr; | Journal of the Korean Society for Precision Engineering | 1225-9071 | 38 | 4 | 0.07 | 2025-07-30 | 1 | Air-gap layer; Contact behavior; Energy harvesting; Triboelectric nanogenerator | Korean | Final | 2021 | 10.7736/jkspe.021.005 | 바로가기 | 바로가기 | ||||||||||||||||
| ○ | Article | Development and performance evaluation of a fine stage for compensating 6-DOF motion errors of an ultra-precision linear stage | In ultra-precision processes, such as aerospace parts and precision mold machining, the accuracy of a feed drive system should be secured to achieve sufficient form accuracy. Dual-Servo stages, which compensate for multi-DOF motion errors, are being developed depending on the applied processes. This paper deals with the fine stage of a dual-servo stage to compensate for 6-DOF motion errors of a linear stage. The proposed fine stage measured 6-DOF errors of the linear stage motion with capacitive sensors, a reference mirror, and an optical encoder. It compensated for the errors using the flexure hinge mechanism with piezo actuators. The error equations and the inverse kinematics were derived to calculate the 6- DOF errors and displacements of piezo actuators for 6-DOF motions, respectively. Performance evaluation was implemented to verify feasibility of the developed fine stage of the fabricated dual-servo stage. Through the step response test of the fine stage, compensation resolutions for the translational and the rotational motion were confirmed to be less than 10 nm and 1/3 arcsec, respectively. The 6-DOF motion errors in the verification test were reduced by 73% on average. © The Korean Society for Precision Engineering. | Lee, Hoon-Hee; Lee, In-Seok; Lee, Kwang-Il; Yang, Seung-Han | Precision Mechanical Process and Control RandD Group, Korea Institute of Industrial Technology, South Korea; School of Mechanical Engineering, Kyungpook National University, South Korea; School of Mechanical and Automotive Engineering, Kyungil University, South Korea; School of Mechanical Engineering, Kyungpook National University, South Korea | 55797047500; 57222405224; 57196250383; 8407949900 | syang@knu.ac.kr; | Journal of the Korean Society for Precision Engineering | 1225-9071 | 38 | 2 | 0.14 | 2025-07-30 | 2 | 6-DOF motion errors; Capacitive sensor; Dual-servo stage; Error compensation; Flexure hinge; Piezoelectric actuator | Korean | Final | 2021 | 10.7736/jkspe.020.083 | 바로가기 | 바로가기 | ||||||||||||||||
| ○ | ○ | Article | Development of 6 DOF Upper-Limb Patient Simulator for Hands-On Rehabilitation Education | In rehabilitation treatment, the physiotherapy manual diagnostic method is the most affordable to cure spasticity disorders caused by neural impairments. The proficiency of the rehabilitation therapist is critical to maximizing the treatment effect; therefore the therapist's training focuses on physical hands-on practice. However, realizing a hands-on training to untrained therapists is not readily allowed because the joint's spasticity in patients is not standardized quantitatively and the unstable supply of spasticity patients with various rigidness for hands-on training. Therefore, the new 6-DOFs upper-limb patient simulator for hands-on rehabilitation education in this study is developed for use in supporting standardized quantitative levels to untrained therapists. Additionally, the new simulator includes a function of manual diagnosis to embody various spastic rigidity of patients' joint. For the verification of the proposed system, both trained and untrained therapists evaluate how well the joints' spasticity of the developed robotic simulator and human patients are similar. Consequently, the developed robotic simulator is validated to be effective for rehabilitation therapy education. | Kong, Jaeho; Kwon, Yonghyun; Yi, Hak | Kyungpook Natl Univ, Dept Mech Engn, Daegu 41566, South Korea; Yeungnam Univ Coll, Dept Phys Therapy, Daegu, South Korea | 57200373223; 59783434300; 56567311000 | yihak@knu.ac.kr; | IEEE TRANSACTIONS ON MEDICAL ROBOTICS AND BIONICS | 2576-3202 | 3 | 1 | 0.14 | 2025-07-30 | 1 | 2 | Robotic patient simulator; rehabilitation education; spasticity of joint stiffness; manual muscle test (MMT); modified ashworth scale (MAS) | PATHOPHYSIOLOGY; RELIABILITY; SPASTICITY | manual muscle test (MMT); modified ashworth scale (MAS); rehabilitation education; Robotic patient simulator; spasticity of joint stiffness | Agricultural robots; Diagnosis; Joints (anatomy); Neuromuscular rehabilitation; Personnel training; Rigidity; Robotics; Simulators; Social robots; Diagnostic methods; Hands-on practice; Hands-on-trainings; Patient simulators; Quantitative level; Rehabilitation therapy; Robotic simulator; Treatment effects; Educational robots | English | 2021 | 2021-02 | 10.1109/tmrb.2021.3052581 | 바로가기 | 바로가기 | 바로가기 | ||||||||||
| ○ | ○ | Article | Development of a Field-Based Chemistry Experiment Teaching Model to Strengthen Pre-Service Teachers' Competence for Teaching Chemistry Experiments | The FCE ( field-based chemistry experiment) model was developed to cultivate preservice science teachers' ability to teach chemistry experiments in secondary classrooms. We describe the process of developing the FCE model and student activities via feedback from experts and analysis of the implemented program. This study evaluated the effectiveness of implementing the FCE model with 58 pre-service science teachers to examine how this model impacts on the role of the instructor and students. Implementation impact was examined by analyzing qualitative data from surveys and observations of student activities. The FCE model minimized the role of the instructor by using flipped learning and cooperative learning, which enabled learners to construct class contents by themselves with topics aligned to the secondary science curriculum. Findings suggest the FCE model supports pre-service science teachers to acquire both knowledge and practical skills related to conducting and teaching experiments. Implications for pre-service science teacher preparation are discussed. | Bae, Sung Woo; Lee, Jae Hwan; Park, Jongseok | Daegu Dongbu High Sch, Daegu 41074, South Korea; Kyungpook Natl Univ, Dept Chem Educ, Daegu 41566, South Korea | 55597610500; 55541966100; 57022500800 | psw311@nate.com;deresa22@knu.ac.kr;parkbell@knu.ac.kr; | ASIA-PACIFIC SCIENCE EDUCATION | 2364-1177 | 7 | 2 | 0.37 | 2025-07-30 | 2 | 3 | field-based; flipped learning; cooperative learning; pre-service teacher | Cooperative learning; Field-based; Flipped learning; Pre-service teacher | English | 2021 | 2021-12 | 10.1163/23641177-bja10037 | 바로가기 | 바로가기 | 바로가기 | ||||||||||||
| ○ | Article | Development of a Korean chatbot system that enables emotional communication with users in real time | In this study, the creation of emotional dialogue was investigated within the process of developing a robot's natural language understanding and emotional dialogue processing. Unlike an English-based dataset, which is the mainstay of natural language processing, the Korean-based dataset has several shortcomings. Therefore, in a situation where the Korean language base is insufficient, the Korean dataset should be dealt with in detail, and in particular, the unique characteristics of the language should be considered. Hence, the first step is to base this study on a specific Korean dataset consisting of conversations on emotional topics. Subsequently, a model was built that learns to extract the continuous dialogue features from a pre-trained language model to generate sentences while maintaining the context of the dialogue. To validate the model, a chatbot system was implemented and meaningful results were obtained by collecting the external subjects and conducting experiments. As a result, the proposed model was influenced by the dataset in which the conversation topic was consultation, to facilitate free and emotional communication with users as if they were consulting with a chatbot. The results were analyzed to identify and explain the advantages and disadvantages of the current model. Finally, as a necessary element to reach the aforementioned ultimate research goal, a discussion is presented on the areas for future studies. © 2021, Korean Sensors Society. All rights reserved. | Baek, Sungdae; Lee, Minho | School of Electronic and Electrical Engineering, Kyungpook National University, 80, Daehak-ro,, Buk-gu, Daegu, 41566, South Korea; Department of Artificial Intelligence, Kyungpook National University, 80, Daehak-ro, Buk-gu, Daegu, 41566, South Korea | 58064927200; 57191730119 | mholee@gmail.com; | Journal of Sensor Science and Technology | 1225-5475 | 30 | 6 | 0 | 2025-07-30 | 0 | Chatbot system; Emotional dialogue; Korean language; Natural language processing; Transfer learning | Korean | Final | 2021 | 10.46670/jsst.2021.30.6.429 | 바로가기 | 바로가기 |
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