연구성과로 돌아가기
2025 연구성과 (137 / 151)
※ 컨트롤 + 클릭으로 열별 다중 정렬 가능합니다.
Excel 다운로드
| 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ○ | Article | A consensus based handover scheme for autonomous underwater vehicle swarms in underwater acoustic sensor networks | This paper proposes a novel underwater handover mechanism based on clusters, designed to ensure continuous connectivity for Autonomous Underwater Vehicle (AUV) swarms. The proposed method leverages a consensus algorithm, enabling all nodes within the swarm to participate in the process of making handover decisions. Instead of relying on centralized control by a specific node, the nodes within the swarm achieve consensus through 1-hop message exchanges, determining whether to attempt a handover based on the agreement reached. Simulation results show that the AUV swarm successfully determines handover decisions in accordance with channel conditions and swarm mobility through consensus while minimizing unnecessary handovers. Compared to the conventional method, where a single AUV makes independent handover decisions, the proposed approach demonstrates performance improvements of approximately 30.12 % in energy consumption and 8.89 % in Signal to Noise Ratio (SNR). | Kim, Hyeon-Gi; Park, Si-Yeong; Lee, Jong-Won; Cho, Ho-Shin | Kyungpook Natl Univ, Dept Elect Engn, 80 Daehak Ro, Daegu 41566, South Korea | hscho@ee.knu.ac.kr; | JOURNAL OF THE ACOUSTICAL SOCIETY OF KOREA | J ACOUST SOC KOREA | 1225-4428 | 2287-3775 | 44 | 3 | ESCI | ACOUSTICS | 2024 | 0.3 | 96.3 | 0 | Swarm handover; Consensus algorithm; Underwater acoustic network; Autonomous Underwater Vehicle (AUV) | Korean | 2025 | 2025 | 10.7776/ask.2025.44.3.193 | 바로가기 | 바로가기 | 바로가기 | |||||||||||
| ○ | Article | A study on two stage acoustic classification neural network training algorithm from pretrained models for small scale data environments | Training data directly impacts neural network performance during machine learning. Limited training data causes performance degradation in larger neural networks compared to simpler ones. We propose a two stage neural network method using feature extraction and classifier networks with pretrained models to address data scarcity. Performance evaluation on small scale datasets compared our method against conventional networks. Our approach achieved improved classification performance at similar complexity levels. The method demonstrated improved performance of the proposed method even with complex models where traditional training models of similar complexity typically degrade performance, showing effectiveness of the proposed method under data constraints. | Shin, Seunghyeon; Kim, Minhan; Lee, Seokjin | Kyungpook Natl Univ, Sch Elect Engn, 80 Daehak Ro, Daegu 41566, South Korea | sjlee6@knu.ac.kr; | JOURNAL OF THE ACOUSTICAL SOCIETY OF KOREA | J ACOUST SOC KOREA | 1225-4428 | 2287-3775 | 44 | 3 | ESCI | ACOUSTICS | 2024 | 0.3 | 96.3 | 0 | Machine learning; Small scale data; Pretrained model; Acoustic scene classification | DISTILLATION | Korean | 2025 | 2025 | 10.7776/ask.2025.44.3.270 | 바로가기 | 바로가기 | 바로가기 | ||||||||||
| ○ | Article | Improvement of non-negative matrix factorization-based active sonar reverberation suppression method using L1-norm and majorization-minimization | In this paper, we conduct research on an algorithm to suppress reverberation using a non-negative matrix factorization technique for target detection using an active sonar system. In this paper, we focus on the disadvantage that conventional algorithm estimates the target echo and reverberation bases through iterative estimation, which takes a long time to calculate. To improve this, we use the L1-norm to quickly converge to the desired solution at the beginning of the iteration. In addition, considering the fact that the heuristic multiplicative update method used in the conventional algorithm does not mathematically guarantee the convergence of additional penalty functions, the update equation is developed through a majorization-minimization technique that can guarantee convergence. Simulations were performed to verify the algorithm, and the results showed that the signal-to-noise ratio performance of the proposed algorithm was improved by 3 dB compared to the conventional algorithm. | Lee, Seokjin; Lee, Wonnyoung; You, Yena; Lee, Seungheon; Kim, Daekyung; Nam, Junsub | Kyungpook Natl Univ, Sch Elect Engn, 80 Daehak Ro, Daegu 41566, South Korea | sjlee6@knu.ac.kr; | JOURNAL OF THE ACOUSTICAL SOCIETY OF KOREA | J ACOUST SOC KOREA | 1225-4428 | 2287-3775 | 44 | 2 | ESCI | ACOUSTICS | 2024 | 0.3 | 96.3 | 0 | Active sonar; Reverberation suppression; Non-negative matrix factorization; Majorization-minimization | Korean | 2025 | 2025 | 10.7776/ask.2025.44.2.094 | 바로가기 | 바로가기 | 바로가기 | |||||||||||
| ○ | Article | Characteristics of Convectively Induced Turbulence Derived from the Weather Radar data in Korea | Convectively Induced Turbulence (CIT) near deep convection often causes in-flight injuries and fatalities for cruising aircraft. To avoid CIT events, we developed and tested the radar-based CIT detection algorithm using the Spectral Width (SW) information in Korea. For providing an objective intensity of CIT, we converted the radar SW data to an Eddy Dissipation Rate (SW-EDR) using the lognormal mapping technique. When compared with in situ EDR measurements observed from the Aircraft Meteorological Data Relay (AMDAR) data, SW-EDR showed a good agreement in identifying locations and intensities of CIT. To further analyze the characteristics of the CIT, two different types of convective systems are selected: a cloud cluster (CC) case on May 30, 2021 and an isolated thunderstorm (IS) case on July 15, 2021. In these cases, intensities and frequencies in CIT are examined separately by lifecycles: initial, mature, and dissipating stages. As a result, each case shows different trends and peak times of the CIT intensity. In CC case, light and moderate intensity of CIT are prevalent in initial stage, while severe intensity is dominant in mature one. In IS case, the light, moderate, and severe intensities of CIT are frequent not only in initial stage but also in dissipating one. This study suggests that the SW-EDR is more useful for detecting objective intensity and location of CIT than sorely using radar reflectivity. In general, it shows a higher risk of strong CIT in upper part of convective systems, which helps providing a better guidance for avoiding CIT. | Kim, Juseob; Kim, Jung-Hoon; Lee, Dan-Bi; Lee, Gyuwon | Seoul Natl Univ, Sch Earth & Environm Sci, 1 Gwanak Ro, Seoul 08826, South Korea; Seoul Natl Univ, Climate & Atmospher Environm Res Inst CARI, Seoul, South Korea; Kyungpook Natl Univ, Ctr Atmospher Remote Sensing CARE, Dept Atmospher Sci, BK21 Weather Extremes Educ & Res Team, Daegu, South Korea | Kim, Jung-Hoon/AEK-6080-2022 | jhkim99@snu.ac.kr; | ATMOSPHERE-KOREA | ATMOS-KOREA | 1598-3560 | 2288-3266 | 35 | 1 | ESCI | METEOROLOGY & ATMOSPHERIC SCIENCES | 2024 | 0.6 | 96.8 | 0 | Convectively induced turbulence; Weather radar spectrum width; Lognormal mapping technique; Eddy dissipation rate | ENERGY-DISSIPATION RATES; PART; SYSTEMS; PREDICTION; PENINSULA; RAINFALL; FEATURES; GROWTH; LEVEL | Korean | 2025 | 2025 | 10.14191/atmos.2025.35.1.065 | 바로가기 | 바로가기 | 바로가기 | |||||||||
| ○ | Article | Development of Radar Wind Profiler (RWP) and Accuracy Evaluation | This study introduces a domestically developed the Radar Wind Profiler (RWP) and evaluates its performance qualitatively and quantitatively. The newly developed RWP that was installed at the testbed site of the National Typhoon Center in Jeju on March 2021 consists of indoor and outdoor units. The RWP utilizes an active phased array antenna system with 256 elements arranged in a 16 x 16 grid, allowing continuous steering of beams for azimuth angles from 0o to 360o and zenith angles up to +/- 20o. Through in-house signal processing and quality control algorithms, Doppler power spectra and spectral moments are derived. Using the Doppler Beam Swinging (DBS) method, calculates horizontal and vertical winds. Intensive observations were conducted at the testbed site from June 20 to August 19, 2021. To optimize the quality control of RWP radial velocities, data from the high-mode observations over nine months (March to November 2021) were analyzed to determine quality control thresholds. The performance of RWP was validated by comparison with rawinsonde observations that are launched from June 20 to August 19, 2021. Results show high accuracy and reliability with root mean square errors (RMSE) of 0.99 m s(-1) for wind speed, 8.27o for wind direction, success operational ratio of 97.7%. The performance improved notably in the latter part of the observation period of rawinsondes. Signal-to-noise ratio (SNR) and valid ratio of data tended to decrease with altitude, with an average valid ratio of 98.5% and an average SNR of 42.8 dB between 400 m and 3 km. | Lyu, Geunsu; Lee, Gyuwon | Kyungpook Natl Univ, Ctr Atmospher REmote Sensing CARE, Daegu, South Korea; Kyungpook Natl Univ, Dept Atmospher Sci, Weather Extremes Educ & Res Team BK21, Daegu, South Korea | gyuwon@knu.ac.kr; | ATMOSPHERE-KOREA | ATMOS-KOREA | 1598-3560 | 2288-3266 | 35 | 1 | ESCI | METEOROLOGY & ATMOSPHERIC SCIENCES | 2024 | 0.6 | 96.8 | 0 | Radar wind profiler; Signal processing; Phased array antenna; Quality control; Doppler beam swinging | LOWER ATMOSPHERE | Korean | 2025 | 2025 | 10.14191/atmos.2025.35.1.137 | 바로가기 | 바로가기 | 바로가기 | ||||||||||
| ○ | Article | Statistical Prediction of Growing Season in Vegetation over South Korea Using Climate Factors | This study defines growing season in vegetation over South Korea and examines the impact of climatic factors on the growing season. Also, a statistical model for predicting growing season was developed using stepwise regression based on climate factors. Using satellite-observed data, start of the growing season (SOS), end of the growing season (EOS), and length of the growing season (LOS) dates were estimated and compared with observed leaf-out and flowering dates from arboretums. Results indicated that between 2001 and 2020, SOS is advancing at a rate of -0.490 days year(-1), EOS is delaying at 0.229 days year(-1) and LOS is extending at 0.771 days year(-1). Climatic factors affecting the growing season, such as temperature and precipitation from 1, 2, 3, and 4 months before SOS and EOS dates, winter duration, preseason temperature, growing season temperature, and preseason rainfall were analyzed and some of these factors were used for the statistical prediction model. Results using leave-one-out cross validation showed that the prediction model for SOS, EOS, and LOS demonstrated good predictive performance. Our study provides information for understanding the growing season in vegetation in response to climate change over South Korea. This suggests the potential applicability of statistical models for forecasting vegetative growing season under the future climate change. | Lee, Chan-Gi; Park, Tae-Won; Park, Doo-Sun R.; Ko, Hye-Young; Son, Eun-Ha; Kim, Meeja | Chonnam Natl Univ, Dept Oceanog, Gwangju, South Korea; Chonnam Natl Univ, Dept Earth Sci Educ, 77 Yongbong Ro, Gwangju 61186, South Korea; Kyungpook Natl Univ, Dept Earth Sci Educ, Daegu, South Korea; Kyungpook Natl Univ, Dept Atmospher Sci, Weather Extremes Educ & Res Team, Daegu, South Korea; Kyungpook Natl Univ, Ctr Atmospher REmote Sensing, Daegu, South Korea; Natl Meteorol Satellite Ctr, Chungbuk, South Korea | Park, Doo-Sun/U-9448-2019; Park, Tae-Won/AAE-3559-2019 | park2760@jnu.ac.kr; | ATMOSPHERE-KOREA | ATMOS-KOREA | 1598-3560 | 2288-3266 | 35 | 1 | ESCI | METEOROLOGY & ATMOSPHERIC SCIENCES | 2024 | 0.6 | 96.8 | 0 | NDVI; Vegetation; Growing season; Climate change; Climate factors; Statistical model | ATTRIBUTION; CHINA | Korean | 2025 | 2025 | 10.14191/atmos.2025.35.1.029 | 바로가기 | 바로가기 | 바로가기 | |||||||||
| ○ | Article | Synthesis and Characterization of Gold-Peptide Hybrid Nanofibers with Photothermal Conversion and Catalytic Properties; [광열전환 및 촉매 특성을 가진 금-펩타이드 하이브리드 나노섬유의 합성 및 특성 분석] | In this study, gold-peptide hybrid nanofibers were synthesized and their photothermal conversion and catalytic properties were investigated. A peptide sequence capable of binding and reducing gold ions was designed, and it was self-assembled into nanofibers in an aqueous solution. To analyze the self-assembly mechanism, experiments with non-covalent bond inhibitors were conducted, confirming the formation of β-sheet structures. The peptide nanofibers underwent a biomineralization process to synthesize gold nanoparticles on their surface, which were analyzed using UV-Vis spectroscopy, transmission electron microscopy, and X-ray diffraction. The gold-peptide hybrid nanofibers exhibited a reaction rate constant of 36.3 × 10-3 s-1 for organic dye degradation and a photothermal conversion efficiency of 11.2%. © 2025 Korean Institute of Chemical Engineers. All rights reserved. | Kwon, Kido; Hur, Yun-Mi; Min, Kyoung-Ik | Department of Biomedical Convergence Science and Technology, Kyungpook National University, 80 Daehakro, Bukgu, Daegu, 41566, South Korea; Department of Biomedical Convergence Science and Technology, Kyungpook National University, 80 Daehakro, Bukgu, Daegu, 41566, South Korea; Department of Biomedical Convergence Science and Technology, Kyungpook National University, 80 Daehakro, Bukgu, Daegu, 41566, South Korea | 59715239400; 57222251131; 25028141900 | kimin@knu.ac.kr; | Korean Chemical Engineering Research | KOREAN CHEM ENG RES | 0304-128X | 2233-9558 | 63 | 1 | ESCI | ENGINEERING, CHEMICAL | 2024 | 0.3 | 96.9 | 0 | 2025-05-07 | 0 | Biomineralization; Gold nanoparticle; Peptide assembly; Photothermal conversion; Tyrosine | Korean | Final | 2025 | 10.9713/kcer.2025.63.1.137 | 바로가기 | 바로가기 | 바로가기 | ||||||||
| ○ | Article | Evaluation of Traction Performance of Agricultural Tractor under Chisel Plowing Operation | Tractors perform different agricultural tasks by pulling various attachments under irregular soil conditions. Tractor traction performance varies depending on the type of attachment. This information is useful in tractor design and control. The purpose of this study is to evaluate the traction performance of a tractor according to its travel speed during chisel plowing. To evaluate the traction performance of a tractor, a system was constructed to measure engine information, tractor vehicle information (travel speed, axle load), and traction information (draft force, tillage depth). Field experiments were conducted in paddy fields and actual vehicle data were collected. To evaluate the traction performance according to travel speed, the collected data were divided into three groups (TS1, TS2, TS3) according to travel speed. As the travel speed increased, the traction performance (draft force, slip ratio, traction coefficient, and traction efficiency) of the tractor tended to decrease. Moreover, the results of comparing the measured draft force with the predicted value of the ASABE model showed that it was within the tolerance limits suggested by the standard under all speed conditions. The highest error was at 38% in the highest speed section (TS3). This study can be potentially used as basic data for the development of optimal tractor design and control algorithms in the future. | Lee, Si-Eon; Kim, Yong-Joo; Kim, Wan-Soo | Kyungpook Natl Univ, Dept Bioind Machinery Engn, Daegu, South Korea; Chungnam Natl Univ, Dept Smart Agr Syst & Mech Engn, Daejeon, South Korea; Kyungpook Natl Univ, Dept Smart Bioind Mech Engn, Daegu, South Korea; Kyungpook Natl Univ, Upland Field Machinery Res Ctr, Daegu, South Korea | wansoo.kim@knu.ac.kr; | TRANSACTIONS OF THE KOREAN SOCIETY OF MECHANICAL ENGINEERS A | T KOR SOC MEC ENG A | 1226-4873 | 2288-5226 | 49 | 6 | ESCI | ENGINEERING, MECHANICAL | 2024 | 0.2 | 97.5 | 0 | Agricultural Tractor; Traction Performance; Chisel Plow; Traction Performance Measurement System | PARAMETERS; DRAFT | Korean | 2025 | 2025-06 | 10.3795/ksme-a.2025.49.6.437 | 바로가기 | 바로가기 | 바로가기 | ||||||||||
| ○ | Article | Identification of Brittleness Distribution Based on Elastic Properties: A Case Study and Application | Rock brittleness is a crucial indicator of fracture complexity and potential microearthquake events, making it applicable to safety assessments of various subsurface utilization technologies, including carbon capture and storage (CCS), underground hydrogen storage (UHS), and subsurface radioactive waste disposal. In addition, brittleness is an essential parameter in hydraulic fracturing design and sweet-spot identification for shale reservoir development. Typically, brittleness can be determined using either the mineralogical characteristics or the petrophysical properties of rocks. The mineralogical approach calculates the brittleness index based on the content ratios of constituent minerals, such as quartz and calcite. To determine the brittleness distribution based on petrophysical properties, characteristic values such as Young's modulus and Poisson's ratio are essential. These properties can be derived from well-logging and seismic data, enabling a comprehensive evaluation of the brittleness distribution. Although seismic data are effective for identifying petrophysical properties across extensive formations, an indirect approach limits the ability to obtain high-resolution property information. In contrast, well-logging data are directly obtained through borehole measurement instruments and provide accurate information with high resolution; however, they can only obtain local information about the area surrounding the borehole. In this study, we analyzed case studies of brittleness distribution using well-logging and seismic data. The methodologies were applied to the Volve Field dataset from the North Sea, which was released by Equinor for academic purposes. Well-logging and seismic data were integrated to predict elastic properties, including compressional travel time (DTC), bulk density (RHOB), and shear wave travel time (DTS), to derive Young's modulus and Poisson's ratio for the Volve Field. Based on these analyses, the regional brittle-ductile distribution in the Volve Field study area was effectively classified and evaluated. | Kim, Sujeong; Jun, Hyunggu | Kyungpook Natl Univ, Dept Geol, 80 Daehak Ro, Daegu 41566, South Korea | kimsj1313@knu.ac.kr; hgjun@knu.ac.kr; | GEOPHYSICS AND GEOPHYSICAL EXPLORATION | GEOPHYS GEOPHYS EXPL | 1229-1064 | 2384-051X | 28 | 1 | ESCI | GEOCHEMISTRY & GEOPHYSICS | 2024 | 0.3 | 97.5 | 0 | Brittleness; Well Logging Data; Seismic Data; Young's Modulus; Poisson's Ratio | SHALE; SANDSTONE; BASIN | Korean | 2025 | 2025 | 10.7582/gge.2025.28.1.001 | 바로가기 | 바로가기 | 바로가기 | ||||||||||
| ○ | Article | Object Recognition and Tracking Based on RGB-T Cameras in Fire Scenes | (sic) (sic)(sic) (sic)(sic)(sic)(sic)(sic) (sic)(sic)(sic)(sic) (sic)(sic) (sic)(sic) (sic)(sic) (sic)(sic)(sic) (sic)(sic)(sic) (sic)(sic)(sic)(sic). Abstract: This study investigates a method for accurately detecting and tracking the location and movement of objects in fire scenes using RGB and thermal images. The proposed coarse-to-fine fusion method is used to recognize objects, and the optical flow algorithm is then applied within the detected object areas to track their movement directions. The experiments were conducted using a mobile robot in a simulated fire environment, where object recognition and tracking were performed. The performance of the object detection model was evaluated using the standard COCO evaluation metrics, and the object tracking performance was verified by analyzing the changes in tracking vectors of accelerating objects in thermal images. This research provides a foundation for practical applications, such as security surveillance and rescue operations in disaster environments, by utilizing complex image data. | Kwon, Hyoek Jun; Min, Sang; Park, Hwi Jin; Yi, Hak | Kyungpook Natl Univ, Dept Mech Engn, Daegu, South Korea | yihak@knu.ac.kr; | TRANSACTIONS OF THE KOREAN SOCIETY OF MECHANICAL ENGINEERS A | T KOR SOC MEC ENG A | 1226-4873 | 2288-5226 | 49 | 4 | ESCI | ENGINEERING, MECHANICAL | 2024 | 0.2 | 97.5 | 0 | English | 2025 | 2025-04 | 10.3795/ksme-a.2025.49.4.307 | 바로가기 | 바로가기 | 바로가기 | ||||||||||||
| ○ | Article | Determination of Optimal Panicle Harvest Timing and Evaluation of Anther Culture Response In Turkish Rice Varieties for Haploid Breeding | This study aimed to evaluate the anther culture response in Turkish rice varieties and assess the feasibility of introducing haploid technology into rice breeding programs in Turkey. Histological analysis revealed that when the anther tip was located between onethird and half of the spikelet' length, about 96% of the pollen was in the uninucleate stage. When the anther tip was positioned between half to three-fourths of the spikelet' length, most of the pollen was in the tricellular stage. The optimal time to harvest panicles for anther culture is when the anther tip located between one-third and one-half of the spikelet's length, with the position closer to one-third being more favorable. The callus induction rate among 39 rice varieties ranged from 0.1% to 48.9%, with an average of 9.9%. The green plant regeneration rate varied 0% to 61.1%, with an average of 10.0%, while green-to-albino ratio was 0.3. The highest rates of both callus induction and plant regeneration were observed in the varieties 'Surek 95' with rates of 48.9% and 61.1%, respectively. The primary challenges in the anther culture of Turkish rice varieties were the risk of contamination during in vitro culture and the high frequency of albino plant occurrence. In conclusion, although differences in anther culture response were observed among the varieties, the introduction of haploid techniques into Turkish rice breeding programs appears feasible on a limited scale. | Yi, Gihwan; Park, Soon Ki; Kim, Myung-Hee | Kyungpook Natl Univ, Dept Farm Management, 80 Daehakro, Daegu 41566, South Korea; Kyungpook Natl Univ, Inst Agr Sci & Technol, 80 Daehakro, Daegu 41566, South Korea; Kyungpook Natl Univ, Sch Appl Biosci, 80 Daehakro, Daegu, South Korea; Natl Inst Agr Sci, Genom Div, Dept Agr Bioresources, Rural Dev Adm, Jeonju 54874, South Korea | gihwan@knu.ac.kr; | PHILIPPINE JOURNAL OF CROP SCIENCE | PHILIPP J CROP SCI | 0115-463X | 50 | 1 | SCIE | AGRONOMY | 2024 | 0.1 | 98.1 | 0 | Anther; culture; response; rice; Turkey | CLIMATE-CHANGE IMPACTS; RANGELAND; VARIABILITY; ECOSYSTEM; BIOMASS | English | 2025 | 2025-04 | 10.63568/vol50iss1pp1-8 | 바로가기 | 바로가기 | 바로가기 | |||||||||||
| ○ | ○ | Article | Synthesis of Bimetallic Cu-Au Nanotubes and Cu@Au Core-Shell Nanowires for Anti-Oxidative Electrodes | We report the synthesis of bimetallic Cu-Au nanotubes (NTs) and Cu@Au core-shell nanowires (NWs) for use as anti-oxidative electrodes. The fabrication involved two key approaches: galvanic replacement to produce Cu-Au NTs and the physical deposition of Au to form Cu@Au core-shell NWs. The galvanic replacement process generated hollow NTs through the Kirkendall effect, driven by the unequal diffusion rates of Cu and Au during the redox reaction. In contrast, the physical deposition of Au, facilitated by fast reduction kinetics using L-ascorbic acid, enabled the formation of a Au shell encapsulating the Cu NWs, preserving their structural integrity. Morphological and structural analyses confirmed the successful formation of both nanostructures. While the Cu-Au NTs exhibited hollow interiors and increased dimensions, the Cu@Au NWs displayed a solid core-shell morphology with minimal diameter increase. Electrical conductivity and thermal stability tests revealed the superior performance of the Cu@Au NWs. The sheet resistance of Cu@Au NWs remained as low as 4 Omega sq(-1) and showed exceptional thermal stability, with minimal resistance variation (R/R-o similar to 1.36) even after 36 h at 120 degrees C under ambient conditions. In contrast, the Cu-Au NTs suffered rapid oxidation and structural instability. The physical deposition approach holds significant promise for the development of robust, low-resistance electrodes for long-term applications in harsh environments. | Kim, Seokhwan; Lee, Geumseong; Lee, Chanyeong; Yang, Gyeongbok; Park, Seonhwa; Min, Yuho | Kyungpook Natl Univ, Dept Mat Sci & Met Engn, Daegu 41566, South Korea; Kyungpook Natl Univ, Innovat Semicond Educ & Res Ctr Future Mobil, Daegu 41566, South Korea; Kyungpook Natl Univ, Res Inst Automot Parts & Mat, Daegu 41566, South Korea; Kyungpook Natl Univ, Reg Leading Res Ctr Smart Energy Syst, Daegu 41566, South Korea | Min, Yuho/AAA-1287-2020 | 59482653800; 59745119700; 59745436700; 59744961300; 58437403700; 59820781000 | yuhomin@knu.ac.kr; | KOREAN JOURNAL OF MATERIALS RESEARCH | KOR J MATER RES | 1225-0562 | 2287-7258 | 35 | 1 | ESCI | MATERIALS SCIENCE, MULTIDISCIPLINARY | 2024 | 0.3 | 98.2 | 0 | 2025-05-07 | 1 | 1 | Cu nanowire; galvanic replacement; Cu@Au; anti-oxidation; electrode | COPPER NANOWIRES; GALVANIC REPLACEMENT; GOLD; NANOCRYSTALS; STABILITY; GROWTH; ROUTE | anti-oxidation; Cu nanowire; Cu@Au; electrode; galvanic replacement | Ascorbic acid; Deposition rates; Nanotubes; Nanowires; Reaction rates; Shells (structures); Anti-oxidation; Au nanowires; Bimetallics; Core-shell nanowires; Cu nanowires; Cu@au; Diffusion rate; Galvanic replacements; Kirkendall effects; Thermal; Redox reactions | English | 2025 | 2025-01 | 10.3740/mrsk.2025.35.1.9 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | |
| ○ | ○ | Article | Comparing Lexical Retrieval Processing in People with Alzheimer's Disease, Normal Pressure Hydrocephalus, and Parkinson's Disease to Healthy Older Adults | Objectives:The aim of this study was to determine whether multifaceted analyses of a lexical retrieval task can provide meaningful information for the differential diagnosis of Alzheimer's disease (AD), normal pressure hydrocephalus (NPH), and Parkinson's disease (PD). Methods: A total of 41 patients diagnosed with AD, NPH, or PD and 16 healthy elderly adults (HE) were tested on a lexical retrieval task. Response scores, response times, error types, and the percentage of errors resolved were compared across groups, and a correlation analysis with the Korean Mini-Mental State Examination (K-MMSE) was performed. Results: First, the AD, NPH, and PD groups had significantly fewer correct responses and significantly more incorrect responses than the HE group. The PD group made significantly more incorrect responses than the AD group. Second, the AD, NPH, PD group had significantly slower reaction times for correct responses than the HE group. Third, all four groups showed significantly more semantic errors than other error types, and the least were mixed errors. Fourth, the three patient groups were significantly less able to monitor and correct errors than the HE group. Fifth, the K-MMSE score was significantly positively correlated with the number of correct responses and negatively correlated with the number of incorrect responses, semantic errors, and unrelated errors. Conclusion: We suggest that the lexical retrieval task can be effectively used to screen patients with AD, NPH, and PD from HE, and explore its potential for differential diagnosis. | Bae, Na-Hyeon; Jang, Ye-Jin; Kim, Nayeon; Park, Ki-Su; Kang, Kyunghun; Yoon, Janghyeok; Ha, Ji-Wan | Daegu Univ, Grad Sch Rehabil, Dept Speech & Language Pathol, Gyongsan, South Korea; Neopons Inc, AI Lab, Daegu, South Korea; Kyungpook Natl Univ, Sch Med, Dept Neurosurg, Daegu, South Korea; Neopons Inc, Daegu, South Korea; Kyungpook Natl Univ, Sch Med, Dept Neurol, Daegu, South Korea; Konkuk Univ, Dept Ind Engn, Seoul, South Korea; Deagu Univ, Dept Speech & Language Pathol, 201 Daegudea Ro, Gyongsan 38453, South Korea | 59755949400; 59755448300; 59756122000; 55932363100; 59755626000; 59755949500; 59755284900 | jw-ha@daegu.ac.kr; | COMMUNICATION SCIENCES AND DISORDERS-CSD | COMMUN SCI DISORD-CS | 2288-1328 | 2288-0917 | 30 | 1 | ESCI | AUDIOLOGY & SPEECH-LANGUAGE PATHOLOGY | 2024 | 0.5 | 98.6 | 0 | 2025-05-07 | 0 | 0 | Alzheimer's disease; Normal pressure hydrocephalus; Parkinson's disease; Lexi-cal retrieval; Response time; Error types; Error resolved | PERFORMANCE; EVOLUTION; SPEECH | Alzheimer’s disease; Error resolved; Error types; Lexical retrieval; Normal pressure hydrocephalus; Parkinson’s disease; Response time | English | 2025 | 2025-03 | 10.12963/csd.250102 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | |||
| ○ | ○ | Article | Pause Characteristics in Story Recall Tasks of Patients with Normal Pressure Hydrocephalus | Objectives: This study aimed to investigate the characteristics of pauses through story recall tasks and identify variables that can significantly classify patients with normal pressure hydrocephalus (NPH) from healthy elderly (HE) adults. Methods: A total of 26 participants were included in the study, comprising 13 NPH patients and 13 HE participants. The number of Information Unit (IU), the total speech length (total speech time) and speaking rate in continuous speech samples were compared between the groups, and the temporal characteristics of pauses were analyzed by categorizing their durations into intervals (0.2 seconds, 0.5 seconds, 0.7 seconds, 1-2 seconds, 4 seconds) and conceptualizing them into indicators (short pauses, medium pauses, long pauses, extended pauses, and prolonged pauses). Additionally, to examine whether the occurrence rates of each pause indicator serve as a valid measure reflecting cognitive and linguistic deficits in NPH patients, correlations were analyzed with the K-MMSE-2 score and the total IU number. Results: The IU number in the NPH group was significantly lower than the HE group. The total speech time was significantly shorter in the NPH group compared to the HE group. However, there was no significant difference in speaking rate between the groups. Prolonged pauses (4 seconds) occurred only in the NPH group, showing a significant correlation with K-MMSE-2 scores and the IU number. Conclusion: This study is significant in that it reveals pause characteristics in patients with NPH and suggests that temporal features in utterances may be a useful marker for screening for NPH. | Choi, Seon-Jin; Park, Ki-Su; Yoon, Janghyeok; Ha, Ji-Wan | Daegu Univ, Grad Sch Rehabil, Dept Speech & Language Pathol, Gyongsan, South Korea; Kyungpook Natl Univ, Sch Med, Dept Neurosurg, Daegu, South Korea; Neopons Inc, Daegu, South Korea; Konkuk Univ, Dept Ind Engn, Seoul, South Korea; Daegu Univ, Dept Speech & Language Pathol, 201 Daegudea Ro, Gyongsan 38453, South Korea | 59755287600; 55932363100; 59696465200; 57072470300 | jw-ha@daegu.ac.kr; | COMMUNICATION SCIENCES AND DISORDERS-CSD | COMMUN SCI DISORD-CS | 2288-1328 | 2288-0917 | 30 | 1 | ESCI | AUDIOLOGY & SPEECH-LANGUAGE PATHOLOGY | 2024 | 0.5 | 98.6 | 0 | 2025-05-07 | 0 | 0 | Normal pressure hydrocephalus; Story recall; Pause duration; Pause indicator; Prolonged pauses | MILD COGNITIVE IMPAIRMENT; ALZHEIMERS-DISEASE; INFORMATION-RETRIEVAL; SPEECH; MEMORY; RECOGNITION; PERFORMANCE | Normal pressure hydrocephalus; Pause duration; Pause indicator; Prolonged pauses; Story recall; 과도한 쉼; 쉼 지속시간; 쉼 지표; 이야기 회상; 정상압수두증 | English | 2025 | 2025-03 | 10.12963/csd.250109 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | |||
| ○ | ○ | Proceedings Paper | A Design of Real-Time Style-Transfer Operations in a Game Engine | Style transfer operations are the process for transferring a specific style of an image to the target image, while preserving the visual contents of the target image. Currently, the style transfer operations are usually implemented with machine learning techniques. Our goal is to finally achieve real-time style-transfer operations, as the special effect tools on the game engines, which is typically composed of various modules required to develop games. To efficiently implement the style transfer operations, as a special kind of machine-learning-related operations, we need to maintain efficient data management methods and also efficient handling of neural-network related operations. In this work, we designed a separate data processing method with Python modules, which are specialized for inferencing, to preserve the performance of the underlying game engine, as much as possible. | Park, Haechan; Baek, Nakhoon | Kyungpook Natl Univ, Sch Comp Sci & Engn, Daegu 41566, South Korea; Kyungpook Natl Univ, Grad Sch Data Sci, Daegu 41566, South Korea; Kyungpook Natl Univ, Data Driven Intelligent Mobil ICT Res Ctr, Daegu 41566, South Korea | 57212931500; 7007017954 | nbaek@knu.ac.kr; | ADVANCES IN VISUAL COMPUTING, ISVC 2024, PT II | 0302-9743 | 1611-3349 | 15047 | 0 | 2025-05-07 | 0 | 0 | style transfer; game engine; real-time processing | LEVEL | game engine; real-time processing; style transfer | Data reduction; Gluing; Transfer learning; Game Engine; Machine learning techniques; Machine-learning; Management method; Neural-networks; Real- time; Realtime processing; Style transfer; Target images; Visual content; Adversarial machine learning | English | 2025 | 2025 | 10.1007/978-3-031-77389-1_33 | 바로가기 | 바로가기 | 바로가기 |
페이지 이동: