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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 | Competing Miners: A Synergetic Solution for Combining Blockchain and Edge Computing in Unmanned Aerial Vehicle Networks | Edge computing (EC) is very useful and particularly promising for many practical unmanned aerial vehicle (UAV) applications. Integrating the blockchain to this technology strengthens privacy protection and data integrity and also prevents data from being easily leaked. However, the required operations in the blockchain are computationally heavy because a blockchain requires devices to solve a complicated proof-of-work (PoW) puzzle to add new data (i.e., a block) to the blockchain. Solving a PoW requires substantial amounts of time and energy, which are big concerns for UAVs. In this article, we suggest a synergetic solution to address this issue based on multiple competing miners in a blockchain. Specifically, we present two novel frameworks for combining the blockchain and EC to effectively overcome several critical limitations when applying the blockchain to UAV and EC tasks, respectively. The goal of both of these proposed frameworks is to reduce both the time spent on mining and the energy consumption for the EC. We first look at the fundamentals of the blockchain with competing miners. Then, our proposed frameworks are described with experimental results, through which important insights are drawn. We finally discuss application scenarios for our proposed frameworks, the related technical challenges, and future research directions. | Nilsen, Jacob Mathias; Park, Jun-Hyun; Yun, Sangseok; Kang, Jae-Mo; Jung, Heechul | Kyungpook Natl Univ, Dept Artificial Intelligence, Daegu 41566, South Korea; Pukyong Natl Univ, Dept Informat & Commun Engn, Busan 48513, South Korea | Jung, Heechul/HTL-7199-2023; Park, Jun-Hyun/CAG-5910-2022 | 57479379900; 57455816200; 56115729600; 56024930400; 55652175200 | jacobmnilsen@gmail.com;wnsgus126@knu.ac.kr;ssyun@pknu.ac.kr;jmkang@knu.ac.kr;heechul@knu.ac.kr; | APPLIED SCIENCES-BASEL | APPL SCI-BASEL | 2076-3417 | 12 | 5 | SCIE | CHEMISTRY, MULTIDISCIPLINARY;ENGINEERING, MULTIDISCIPLINARY;MATERIALS SCIENCE, MULTIDISCIPLINARY;PHYSICS, APPLIED | 2022 | 2.7 | 46.1 | 0.35 | 2025-06-25 | 3 | 4 | blockchain; competing miners; edge computing; Internet of Things; proof-of-work; unmanned aerial vehicle | UAV; INTERNET; FRAMEWORK; SCHEME; LOOP | Blockchain; Competing miners; Edge computing; Internet of Things; Proof-of-work; Unmanned aerial vehicle | English | 2022 | 2022-03 | 10.3390/app12052581 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | |||
| ○ | ○ | Review | Crosslinking Mechanisms of Phenol, Catechol, and Gallol for Synthetic Polyphenols: A Comparative Review | Since the first introduction of a synthetic polyphenol called polydopamine, both it and its derivatives have received significant attention from material scientists owing to their unique functionality. In particular, synthetic polyphenols have been utilized as interfacial engineering tools; many important review papers have been published regarding this topic. However, despite those that have focused on the applicability of synthetic polyphenols, fundamental aspects of crosslinking mechanisms and resultant characteristics have still been overlooked in the community. This review covers the mechanisms for building synthetic polyphenols, which are dependent on the number of hydroxyl groups of each phenolic building block. The inherent physicochemical properties of the developed polyphenolic materials are discussed in depth herein. This review can provide guidelines for selecting appropriate phenolic building blocks when designing relevant polyphenolic biomaterials. | Choi, Hyunbin; Lee, Kyueui | Kyungpook Natl Univ, Dept Chem, Daegu 41566, South Korea; Kyungpook Natl Univ, Green Nano Mat Res Ctr, Daegu 41566, South Korea | Lee, Kyueui/ACR-8902-2022; Lee, Kyueui/P-8152-2018 | 57976950600; 56404800600 | kyueui@knu.ac.kr; | APPLIED SCIENCES-BASEL | APPL SCI-BASEL | 2076-3417 | 12 | 22 | SCIE | CHEMISTRY, MULTIDISCIPLINARY;ENGINEERING, MULTIDISCIPLINARY;MATERIALS SCIENCE, MULTIDISCIPLINARY;PHYSICS, APPLIED | 2022 | 2.7 | 46.1 | 0.58 | 2025-06-25 | 18 | 18 | synthetic polyphenols; biomaterials; biomimetics; phenolic building block | SURFACE-CHEMISTRY; POLYDOPAMINE; ACID; DITYROSINE; ADHESIVE; IMMOBILIZATION; REGENERATION; EUMELANIN; OXIDATION; DOPAMINE | biomaterials; biomimetics; phenolic building block; synthetic polyphenols | English | 2022 | 2022-11 | 10.3390/app122211626 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | |||
| ○ | ○ | Article | Deep Learning-Aided Downlink Beamforming Design and Uplink Power Allocation for UAV Wireless Communications with LoRa | In this paper, we consider an unmanned aerial vehicle (UAV) wireless communication system where a base station (BS) equipped multi antennas communicates with multiple UAVs, each equipped with a single antenna, using the LoRa (Long Range) modulation. The traditional approaches for downlink beamforming design or uplink power allocation rely on the convex optimization technique, which is prohibitive in practice or even infeasible for the UAVs with limited computing capabilities, because the corresponding convex optimization problems (such as second-order cone programming (SOCP) and linear programming (LP)) requiring a non-negligible complexity need to be re-solved many times while the UAVs move. To address this issue, we propose novel schemes for beamforming design for downlink transmission from the BS to the UAVs and power allocation for uplink transmission from the UAVs to the BS, respectively, based on deep learning. Numerical results demonstrate a constructed deep neural network (DNN) can predict the optimal value of the downlink beamforming or the uplink power allocation with low complexity and high accuracy. | Kim, Yeong-Rok; Park, Jun-Hyun; Kang, Jae-Mo; Lim, Dong-Woo; Kang, Kyu-Min | Kyungpook Natl Univ, Dept Artificial Intelligence, Daegu 41566, South Korea; Elect & Telecommun Res Inst, Radio & Satellite Res Div, Daejeon 34129, South Korea | ; Park, Jun-Hyun/CAG-5910-2022 | 57699286500; 57455816200; 56024930400; 55694295300; 7402223603 | bohr74@knu.ac.kr;wnsgus126@knu.ac.kr;jmkang@knu.ac.kr;window0508@etri.re.kr;kmkang@etri.re.kr; | APPLIED SCIENCES-BASEL | APPL SCI-BASEL | 2076-3417 | 12 | 10 | SCIE | CHEMISTRY, MULTIDISCIPLINARY;ENGINEERING, MULTIDISCIPLINARY;MATERIALS SCIENCE, MULTIDISCIPLINARY;PHYSICS, APPLIED | 2022 | 2.7 | 46.1 | 0.26 | 2025-06-25 | 3 | 3 | beamforming design; convex optimization; deep learning; LoRa (long range); UAV (unmmaned aerial vehicle) | OPTIMIZATION; MODULATION; COMPLEXITY; GRADIENT | beamforming design; convex optimization; deep learning; LoRa (long range); UAV (unmmaned aerial vehicle) | English | 2022 | 2022-05 | 10.3390/app12104826 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | |||
| ○ | ○ | Article | Deep Transfer Learning-Based Fault Diagnosis Using Wavelet Transform for Limited Data | Although various deep learning techniques have been proposed to diagnose industrial faults, it is still challenging to obtain sufficient training samples to build the fault diagnosis model in practice. This paper presents a framework that combines wavelet transformation and transfer learning (TL) for fault diagnosis with limited target samples. The wavelet transform converts a time-series sample to a time-frequency representative image based on the extracted hidden time and frequency features of various faults. On the other hand, the TL technique leverages the existing neural networks, called GoogLeNet, which were trained using a sufficient source data set for different target tasks. Since the data distributions between the source and the target domains are considerably different in industrial practice, we partially retrain the pre-trained model of the source domain using intermediate samples that are conceptually related to the target domain. We use a reciprocating pump model to generate various combinations of faults with different severity levels and evaluate the effectiveness of the proposed method. The results show that the proposed method provides higher diagnostic accuracy than the support vector machine and the convolutional neural network under wide variations in the training data size and the fault severity. In particular, we show that the severity level of the fault condition heavily affects the diagnostic performance. | Bang, Junseong; Di Marco, Piergiuseppe; Shin, Hyejeon; Park, Pangun | Elect & Telecommun Res Inst, Def & Safety ICT Res Dept, Daejeon 34129, South Korea; Univ Aquila, Dept Informat Engn Comp Sci & Math, I-67100 Laquila, Italy; Kyungpook Natl Univ, Dent Clin Ctr, Daegu 41940, South Korea; Chungnam Natl Univ, Dept Radio & Informat Commun Engn, Daejeon 34134, South Korea | ; Di Marco, Piergiuseppe/JMR-4564-2023 | 57210794982; 35306717900; 57211492380; 35173287000 | hjbang2lpp@etri.re.kr;piergiuseppe.dimarco@univaq.it;shjrei@knu.ac.kr;pgpark@cnu.ac.kr; | APPLIED SCIENCES-BASEL | APPL SCI-BASEL | 2076-3417 | 12 | 15 | SCIE | CHEMISTRY, MULTIDISCIPLINARY;ENGINEERING, MULTIDISCIPLINARY;MATERIALS SCIENCE, MULTIDISCIPLINARY;PHYSICS, APPLIED | 2022 | 2.7 | 46.1 | 1.31 | 2025-06-25 | 14 | 17 | transfer learning; wavelet; limited data; fault detection; fault diagnosis; machinery fault | CONVOLUTIONAL NEURAL-NETWORK; ROTATING MACHINERY | fault detection; fault diagnosis; limited data; machinery fault; transfer learning; wavelet | English | 2022 | 2022-08 | 10.3390/app12157450 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | |||
| ○ | ○ | Article | Degreasing Efficiency of Electroplating Pretreatment Process Using Secondary Alcohol Ethoxylate as Nonionic Surfactant | In this study, the effect of the hydrophilic-lipophilic balance (HLB) number and cloud point (CP) of a secondary-alcohol ethoxylated nonionic surfactant on degreasing efficiency was investigated. A degreasing process was conducted for steel samples with different surfactants in a degreasing solution. The HLB number and CP increased with the increasing n of the hydrophilic ethylene oxide (OCH2CH2)(n) group. For a constant temperature of the degreasing solution (30-80 degrees C), the degreasing efficiency was investigated as a function of degreasing time. The highest degreasing efficiency was observed near the cloud point of the surfactant, and the degreasing efficiency decreased significantly at temperatures lower and greater than the cloud point. A Hogaboom test was carried out to observe oil stains on the surface of samples. Additionally, the contact angle of the surface with water droplets was measured after degreasing with various surfactants. | Jeon, Su-Byung; Son, Byung-Ki; Choi, Ji-Won; Son, Injoon | Kyungpook Natl Univ, Dept Mat Sci & Met Engn, Daegu 41566, South Korea; ILSUNG Plating Co Ltd, R&D Ctr, Daegu 42697, South Korea | 57878356900; 57877801800; 57878356800; 9942975800 | ijson@knu.ac.kr; | APPLIED SCIENCES-BASEL | APPL SCI-BASEL | 2076-3417 | 12 | 21 | SCIE | CHEMISTRY, MULTIDISCIPLINARY;ENGINEERING, MULTIDISCIPLINARY;MATERIALS SCIENCE, MULTIDISCIPLINARY;PHYSICS, APPLIED | 2022 | 2.7 | 46.1 | 0.09 | 2025-06-25 | 1 | 1 | degreasing; HLB; pre-treatment process; nonionic surfactant; cloud point | ALKALINE | cloud point; degreasing; HLB; nonionic surfactant; pre-treatment process | English | 2022 | 2022-11 | 10.3390/app122111285 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||||
| ○ | ○ | Article | Effects of Humic Acids on Size and Species Composition of Phytoplankton in a Eutrophic Temperate Estuary | The Yeongsan River estuary was divided into freshwater and seawater zones by a sea dike constructed at its mouth in 1981. The freshwater zone, which flows through a metropolitan area, is eutrophic, causing frequent algal blooms with an expected increase in the concentration of refractory organic compounds such as humic substances (HS). Herein, the in situ freshwater zone phytoplankton community size and taxonomic composition were investigated in response to the addition of humic acids (HA) using seasonal mesocosm experiments. Phytoplankton (chlorophyll a) were fractionated into nano-(20 mu m) classes and identified by species or genus. Their response to HA treatment was examined by repeated measures analysis of variance (RM-ANOVA). With the addition of HA, the concentrations of total and nanosized chlorophyll a increased significantly (p < 0.05), whereas that of net-sized chlorophyll a did not change significantly through the seasons. The abundance of Stephanodiscus sp. (diatoms) also increased significantly when this genus dominated the phytoplankton community. This suggests that the management of HS may be crucial in mitigating algal blooms in estuaries, such as in the Yeongsan River estuary, that are subjected to anthropogenic disturbances by engineered structures. | Sin, Yongsik; Kim, Sunghwan | Mokpo Natl Maritime Univ, Dept Environm Engn & Biotechnol, Mokpo 58628, South Korea; Kyungpook Natl Univ, Dept Chem, Daegu 41566, South Korea | ; Sin, Yongsik/AFH-4920-2022; Kim, Sunghwan/HKN-9812-2023 | 7005868826; 57203772967 | yongsik@mmu.ac.kr; | APPLIED SCIENCES-BASEL | APPL SCI-BASEL | 2076-3417 | 12 | 20 | SCIE | CHEMISTRY, MULTIDISCIPLINARY;ENGINEERING, MULTIDISCIPLINARY;MATERIALS SCIENCE, MULTIDISCIPLINARY;PHYSICS, APPLIED | 2022 | 2.7 | 46.1 | 0.17 | 2025-06-25 | 1 | 2 | humic acids; Yeongsan River estuary; size and taxonomic structure; Stephanodiscus sp; algal blooms; anthropogenic disturbance | WATER-QUALITY; SUBSTANCES; BACTERIA; NITROGEN; GROWTH | algal blooms; anthropogenic disturbance; humic acids; size and taxonomic structure; Stephanodiscussp; Yeongsan River estuary | English | 2022 | 2022-10 | 10.3390/app122010223 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | |||
| ○ | ○ | Article | Effects of the Sn⁴⁺ Substitution and the Sintering Additives on the Sintering Behavior and Electrical Properties of PLZT | (Pb, La)(Zr, Ti)O-3 (PLZT) with antiferroelectric properties can be applied as a capacitor whose capacitance increases in a high electric field. From this, we obtained a high sintering density at 950 degrees C by adding low-temperature sintering additives, 8.0 wt% of PbO and 2.5 wt% of ZnO, simultaneously to a (Pb-0.88, La-0.12)(Zr-0.86, Ti-0.14)O-3 composition. The change in electrical characteristics was confirmed in terms of Sn4+ substitution, resulting in no change in the sintering density by Sn4+ substitution. However, as the amount of Sn4+ substitution increases, the dielectric constant gradually decreases from 1300 to 700, and the grain size decreases from about 4 to 1 mu m in terms of microstructure. In the crystal structure analysis, the general formation of a single perovskite structure was confirmed. The results of the hysteresis curve measurement revealed that the breakdown electric field increases from 4 to 9 kV center dot mm(-1) as the amount of Sn4+ substitution gradually increases. However, polarization decreases in the same way as the permittivity trend. The composition exhibits excellent electrical properties when the ratio of Sn4+ is 0.4: a high energy storage density of 3.5 J center dot cm(-3), energy efficiency of 80%, and breakdown electric field of about 8.5 kV center dot mm(-1). | Choi, Jeoung-Sik; Kim, Dong-Chul; Shin, Hyo-Soon; Yeo, Dong-Hun; Lee, Joon-Hyung | Korea Inst Ceram Engn & Technol, Elect Convergence Mat Div, 101 Sohoro, Jinju 52851, South Korea; Kyungpook Natl Univ, Sch Mat Sci & Engn, Daegu 41566, South Korea | 57478171200; 57226389154; 35273922400; 7006551146; 57204923460 | abcd7516@kicet.re.kr;minamdc@kicet.re.kr;hshin@kicet.re.kr;ydh7@kicet.re.kr;joonlee@knu.ac.kr; | APPLIED SCIENCES-BASEL | APPL SCI-BASEL | 2076-3417 | 12 | 5 | SCIE | CHEMISTRY, MULTIDISCIPLINARY;ENGINEERING, MULTIDISCIPLINARY;MATERIALS SCIENCE, MULTIDISCIPLINARY;PHYSICS, APPLIED | 2022 | 2.7 | 46.1 | 0.35 | 2025-06-25 | 3 | 4 | antiferroelectric; MLCC; PLZST; substitution; additive | ENERGY-STORAGE PERFORMANCE; DEPENDENT DIELECTRIC-PROPERTIES; BREAKDOWN STRENGTH; CERAMICS; DENSITY; MICROSTRUCTURE | Additive; Antiferroelectric; MLCC; PLZST; Substitution | English | 2022 | 2022-03 | 10.3390/app12052591 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||||
| ○ | ○ | Article | Engineering Properties and Economic Feasibility Evaluation of Eco-Friendly Rainwater Detention System with Red Clay Water-Permeable Block Body | An integrated rainwater management system is necessary due to the frequent occurrence of localized torrential rainfall and heat waves caused by an abnormal climate. It is necessary to develop a rainwater detention system that can implement rainwater infiltration and detention simultaneously. In this study, the safety, durability, and eco-friendliness of an eco-friendly rainwater detention system developed using an eco-friendly inorganic binder, which involves red clay, were evaluated and its economic feasibility was compared with that of the existing detention system. After 14 days, analysis of the maximum compression load and computational finite element analysis confirmed that the strength standard was satisfied and the structure was safe. No heavy metals or organic compounds were detected in the leaching test. Thus, the eco-friendly rainwater detention system is structurally safe and eco-friendly with no impact on the soil and groundwater environment, and is economically feasible because the construction cost and life cycle cost are approximately 30% and 58% lower, respectively, than those of the existing polyethylene infiltration detention tank system. These results indicate that improved safety, eco-friendliness, and economic feasibility can be achieved, compared to those of the existing system, if the eco-friendly rainwater detention system is applied in the field. | Kim, Hojin; Choi, Heeyong; Lee, Taegyu; Choi, Hyeonggil | Korea Testing Res Inst, Daegu Gyeongbuk Ctr, 71-18 Geomdan Ro, Daegu 41516, South Korea; Claymax Co Ltd, 454 Songhak Ro, Jecheon Si 27136, South Korea; Semyung Univ, Dept Fire & Disaster Prevent, 65 Semyung Ro, Jecheon Si 27136, South Korea; Kyungpook Natl Univ, Sch Architecture Civil Environm & Energy Engn, 80 Daehakro, Daegu 41566, South Korea | 57219003586; 57425875100; 7501437272; 56430165800 | white002@ktr.or.kr;heeyong21@naver.com;ltg777@semyung.ac.kr;hgchoi@knu.ac.kr; | APPLIED SCIENCES-BASEL | APPL SCI-BASEL | 2076-3417 | 12 | 3 | SCIE | CHEMISTRY, MULTIDISCIPLINARY;ENGINEERING, MULTIDISCIPLINARY;MATERIALS SCIENCE, MULTIDISCIPLINARY;PHYSICS, APPLIED | 2022 | 2.7 | 46.1 | 0.09 | 2025-06-25 | 1 | 1 | rainwater detention system; red clay; engineering property; economic feasibility | Economic feasibility; Engineering property; Rainwater detention system; Red clay | English | 2022 | 2022-02 | 10.3390/app12031193 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | |||||
| ○ | ○ | Article | Ensemble-Guided Model for Performance Enhancement in Model-Complexity-Limited Acoustic Scene Classification | In recent acoustic scene classification (ASC) models, various auxiliary methods to enhance performance have been applied, e.g., subsystem ensembles and data augmentations. Particularly, the ensembles of several submodels may be effective in the ASC models, but there is a problem with increasing the size of the model because it contains several submodels. Therefore, it is hard to be used in model-complexity-limited ASC tasks. In this paper, we would like to find the performance enhancement method while taking advantage of the model ensemble technique without increasing the model size. Our method is proposed based on a mean-teacher model, which is developed for consistency learning in semi-supervised learning. Because our problem is supervised learning, which is different from the purpose of the conventional mean-teacher model, we modify detailed strategies to maximize the consistency learning performance. To evaluate the effectiveness of our method, experiments were performed with an ASC database from the Detection and Classification of Acoustic Scenes and Events 2021 Task 1A. The small-sized ASC model with our proposed method improved the log loss performance up to 1.009 and the F-1-score performance by 67.12%, whereas the vanilla ASC model showed a log loss of 1.052 and an F-1-score of 65.79%. | Lee, Seokjin; Kim, Minhan; Shin, Seunghyeon; Baek, Seungjae; Park, Sooyoung; Jeong, Youngho | Kyungpook Natl Univ, Sch Elect & Elect Engn, Daegu 41566, South Korea; Kyungpook Natl Univ, Sch Elect Engn, Daegu 41566, South Korea; Elect & Telecommun Res Inst, Media Res Div, Daejeon 34129, South Korea | shin, sw/O-6248-2014 | 36174416200; 57216617123; 57221769296; 57469096900; 57221333496; 7202332088 | sjlee6@knu.ac.kr;kmh7576@knu.ac.kr;sineva123@gmail.com;bgsoj61@naver.com;sooyoung@etri.re.kr;yhcheong@etri.re.kr; | APPLIED SCIENCES-BASEL | APPL SCI-BASEL | 2076-3417 | 12 | 1 | SCIE | CHEMISTRY, MULTIDISCIPLINARY;ENGINEERING, MULTIDISCIPLINARY;MATERIALS SCIENCE, MULTIDISCIPLINARY;PHYSICS, APPLIED | 2022 | 2.7 | 46.1 | 0.26 | 2025-06-25 | 6 | 3 | acoustic scene classification; low model complexity; consistency learning; mean-teacher model | Acoustic scene classification; Consistency learning; Low model complexity; Mean-teacher model | English | 2022 | 2022-01 | 10.3390/app12010044 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||||
| ○ | ○ | Editorial Material | Enzyme Catalysis: Advances, Techniques, and Outlooks | Kim, In Jung | Kyungpook Natl Univ, Sch Appl Biosci, Div Plant Biosci, Coll Agr & Life Sci, Daegu 41566, South Korea | kim, nayoung/IWV-4038-2023 | 57195531808 | ij0308@knu.ac.kr; | APPLIED SCIENCES-BASEL | APPL SCI-BASEL | 2076-3417 | 12 | 16 | SCIE | CHEMISTRY, MULTIDISCIPLINARY;ENGINEERING, MULTIDISCIPLINARY;MATERIALS SCIENCE, MULTIDISCIPLINARY;PHYSICS, APPLIED | 2022 | 2.7 | 46.1 | 0.79 | 2025-06-25 | 1 | 1 | English | 2022 | 2022-08 | 10.3390/app12168036 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | |||||||
| ○ | ○ | Article | Ethyl Formate-Based Quarantine Treatment for Exotic Ants and Termites in Imported Rubber Plants and Stone Products | Exotic ants and termites, including Solenopsis invicta, are frequent hitchhikers intercepted from miscellaneous nonfood commodities. In particular, S. invicta has been intercepted in Korea in imported nursery plants, stone, and lumber products, which increases the potential for establishment of this destructive invasive pest in Korea. In this study, we conducted commercial-scale fumigation trials to evaluate ethyl formate (EF) as a potential alternative of methyl bromide using two species of imported rubber plants and pieces of marble as representative good and workers of Reticulitermes speratus as an EF-resistant surrogate for S. invicta. An EF treatment at 35 g/m(3) for 4 h at >15 degrees C, the dose required for LCt(99%) (lethal concentration x time product required for 99% mortality of R. speratus), resulted in the complete control of R. speratus workers tested with rubber plants (Ficus benghalensis and F. retusa) and marble, 9% (w/v) and 60% (v/v) loading ratios, respectively. EF treatment did not adversely affect the leaf chlorophyll content, leaf color, and overall health of rubber plants or the visual appearance of the marble. Our results suggest that EF fumigation is a potential alternative to methyl bromide for the disinfestation of hitchhiking invasive termites and ants, including S. invicta, on imported rubber plants and stone products. | Kim, Dongbin; Kwon, Tae Hyung; Park, Min-Goo; Kim, Kyung Won; Cha, Dong H.; Lee, Byung-Ho | Kyungpook Natl Univ, Inst Qual & Safety Evaluat Agr Prod, 80 Daehak Ro, Daegu 41566, South Korea; Jeonbuk Natl Univ, Dept Bioenvironm Chem, Jeonju 54896, South Korea; Anim & Plant Quarantine Agcy, Gimcheon 39660, South Korea; USDA ARS, US Pacific Basin Agr Res Ctr, Hilo, HI 96720 USA | ; H, Dong/A-3977-2013; Park, Min-Goo/AAV-5273-2020 | 57209617411; 57215832186; 57213595173; 57255195400; 35723823300; 57202841615 | bongbinkim@knu.ac.kr;taehyungkwon@knu.ac.kr;pmg@jbnu.ac.kr;nkwkim@korea.kr;dong.cha@usda.gov;byungholee@knu.ac.kr; | APPLIED SCIENCES-BASEL | APPL SCI-BASEL | 2076-3417 | 12 | 12 | SCIE | CHEMISTRY, MULTIDISCIPLINARY;ENGINEERING, MULTIDISCIPLINARY;MATERIALS SCIENCE, MULTIDISCIPLINARY;PHYSICS, APPLIED | 2022 | 2.7 | 46.1 | 0.17 | 2025-06-25 | 3 | 2 | ethyl formate; Japanese termite; red imported fire ant; Solenopsis invicta; miscellaneous nonfood commodities | FIRE ANT; HEMIPTERA PSEUDOCOCCIDAE; FUMIGATION; DISINFESTATION; PHOSPHINE; TRANSPORT; INVASION; IMPACT | ethyl formate; Japanese termite; miscellaneous nonfood commodities; red imported fire ant; Solenopsis invicta | English | 2022 | 2022-06 | 10.3390/app12126066 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | |||
| ○ | ○ | Article | Evaluation of Structural and Functional Behavior of Battery Charger for Low/High-Frequency Motions in NPP | Earthquake damage to electrical systems degrades their performances and disrupts their normal functioning. Furthermore, it disrupts nuclear power plant (NPP) operations. NPPs in South Korea have been designed based on the Regulatory Guide 1.60 (RG 1.60) design spectra; however, the Gyeongju earthquakes in South Korea were of high frequency, with magnitudes of 5.1 and 5.8. Therefore, the seismic performances of electrical systems (high-frequency sensitive) must be evaluated to consider low- and high-frequency motions. In this study, to ensure the operation of NPPs in South Korea, the seismic performance and dynamic characteristics of the battery charger (BC) in the electrical subsystem were evaluated experimentally. Seismic tests of the BC were performed to consider low frequencies, high frequencies and a combination of both. The dynamic characteristics of the inside and outside of the cabinet, depending on the input motions, were evaluated and compared based on the tests. Moreover, the acceptance criteria for relay contact chatter were evaluated using the measured output signal during the seismic tests. From seismic test results, the peak acceleration of CRS at the top location (A6) was 1.31 times larger than that of UHS and 1.51 times than that of RG 1.60 and it increased rapidly with increasing PGA levels. Contact chatter was not observed under a peak acceleration of 3.4 g on the installed relay of the panel; however, the relay chatter for more than 2 ms dropped below the reference voltage 46 times. The major components of the electric cabinet were significantly affected by high-frequency motion. | Jeong, Young-Soo; Eem, Seung-Hyun; Jeon, Bub-Gyu; Park, Dong-Uk | Pusan Natl Univ, Seism Res & Test Ctr, 49 Busandaehak Ro, Yansan 50612, South Korea; Kyungpook Natl Univ, Dept Convergence & Fus Syst Engn, Major Plant Syst Engn, Sangju 41566, South Korea | Eem, Seunghyun/E-9710-2015 | 53163674500; 52363442900; 54961482000; 56082144000 | ysjung@pusan.ac.kr;eemash@knu.ac.kr;bkjeon79@pusan.ac.kr;kwenry@pusan.ac.kr; | APPLIED SCIENCES-BASEL | APPL SCI-BASEL | 2076-3417 | 12 | 9 | SCIE | CHEMISTRY, MULTIDISCIPLINARY;ENGINEERING, MULTIDISCIPLINARY;MATERIALS SCIENCE, MULTIDISCIPLINARY;PHYSICS, APPLIED | 2022 | 2.7 | 46.1 | 0.09 | 2025-06-25 | 0 | 1 | battery charger; in-cabinet response spectrum; amplification factor; high-frequency motion; shaking-table test | SEISMIC RESPONSE; CABINETS | amplification factor; battery charger; high-frequency motion; in-cabinet response spectrum; shaking-table test | English | 2022 | 2022-05 | 10.3390/app12094328 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | |||
| ○ | ○ | Article | Expandable Spherical Projection and Feature Concatenation Methods for Real-Time Road Object Detection Using Fisheye Image | Fisheye lens cameras are widely used in such applications where a large field of view (FOV) is necessary. A large FOV can provide an enhanced understanding of the surrounding environment and can be an effective solution for detecting the objects in automotive applications. However, this comes with the cost of strong radial distortions and irregular size of objects depending on the location in an image. Therefore, we propose a new fisheye image warping method called Expandable Spherical Projection to expand the center and boundary regions in which smaller objects are mostly located. The proposed method produces undistorted objects especially in the image boundary and a less unwanted background in the bounding boxes. Additionally, we propose three multi-scale feature concatenation methods and provide the analysis of the influence from the three concatenation methods in a real-time object detector. Multiple fisheye image datasets are employed to demonstrate the effectiveness of the proposed projection and feature concatenation methods. From the experimental results, we find that the proposed Expandable Spherical projection and the LCat feature concatenation yield the best AP performance, which is up to 4.7% improvement compared to the original fisheye image datasets and the baseline model. | Kim, Songeun; Park, Soon-Yong | Kyungpook Natl Univ, Sch Elect & Elect Engn, 80 Daehak Ro, Daegu 41566, South Korea; Kyungpook Natl Univ, Sch Elect Engn, 80 Daehak Ro, Daegu 41566, South Korea | Park, Soon-Yong/HGV-2374-2022 | 57240537300; 7501834063 | akskdk4444@gmail.com;sypark@knu.ac.kr; | APPLIED SCIENCES-BASEL | APPL SCI-BASEL | 2076-3417 | 12 | 5 | SCIE | CHEMISTRY, MULTIDISCIPLINARY;ENGINEERING, MULTIDISCIPLINARY;MATERIALS SCIENCE, MULTIDISCIPLINARY;PHYSICS, APPLIED | 2022 | 2.7 | 46.1 | 0.52 | 2025-06-25 | 5 | 6 | fisheye lens; spherical projection; object detection | Fisheye lens; Object detection; Spherical projection | English | 2022 | 2022-03 | 10.3390/app12052403 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||||
| ○ | ○ | Article | Experimental Analysis on Fatigue Life Assessment of Dissimilar Aluminum Alloys Weld Joints under Four-Point Rotating Bending Condition | Industrial applications often require welded joints of dissimilar metals to perform reliably under adverse working conditions. Such conditions demand high resistance to failure modes, such as fatigue, corrosion, and creep. In applications involving intense vibrational and cyclic loading conditions, high strength-to-weight ratio metals, including aluminum, are more vulnerable to fatigue failure. This study investigates the fatigue strength of base metals and tungsten inert gas welded joints of the two most widely used aluminum alloys, AA7075 and AA2024, under four-point rotating bending. For the comparative study, these dissimilar alloys were joined together by using two different filler rods, AA4047 and AA4043, under similar welding conditions. SN curves for all the samples were generated through the experimental iterations. A comparison of different results shows that welded samples have better fatigue strength than the base metals, while, as a filler, AA4047 has better resistance to fatigue fracture than AA4043. | Hashir, Muhammad; Rehman, Tauseef-ur; Kanti, Praveen; Javaid, Muhammad Yasar; Park, Cheol-Woo | Univ Engn & Technol, Dept Mech Engn, Taxila 47050, Pakistan; Kyungpook Natl Univ, Sch Mech Engn, Daegu 41566, South Korea; Indian Inst Technol IIT Madras, Dept Mech Engn, Chennai 600036, Tamil Nadu, India; Govt Coll Univ Faisalabad GCUF, Dept Mech Engn Technol, Faisalabad 38000, Pakistan | ; Kanti, Praveen/AAZ-5228-2021; Rehman, Tauseef-ur/AAE-3086-2022; javaid, Muhammad/W-1321-2019; Kanti, Dr. Praveen Kumar/AAZ-5228-2021 | 57208965278; 57159403400; 57216493630; 56297754400; 7408416474 | mhashir701@gmail.com;metauseef16@gmail.com;praveenkanti87@gmail.com;yasarjavaid@gcuf.edu.pk;chwoopark@knu.ac.kr; | APPLIED SCIENCES-BASEL | APPL SCI-BASEL | 2076-3417 | 12 | 9 | SCIE | CHEMISTRY, MULTIDISCIPLINARY;ENGINEERING, MULTIDISCIPLINARY;MATERIALS SCIENCE, MULTIDISCIPLINARY;PHYSICS, APPLIED | 2022 | 2.7 | 46.1 | 0 | 2025-06-25 | 0 | 1 | dissimilar aluminum joints; fatigue; light-weight structures; TIG welding | MECHANICAL-PROPERTIES; CRACK-GROWTH; MICROSTRUCTURE; BEHAVIOR; SINGLE; STRENGTH; THIN | dissimilar aluminum joints; fatigue; light-weight structures; TIG welding | English | 2022 | 2022-05 | 10.3390/app12094408 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | |||
| ○ | ○ | Article | Extending Contrastive Learning to Unsupervised Redundancy Identification | Modern deep neural network (DNN)-based approaches have delivered great performance for computer vision tasks; however, they require a massive annotation cost due to their data-hungry nature. Hence, given a fixed budget and unlabeled examples, improving the quality of examples to be annotated is a clever step to obtain good generalization of DNN. One of key issues that could hurt the quality of examples is the presence of redundancy, in which the most examples exhibit similar visual context (e.g., same background). Redundant examples barely contribute to the performance but rather require additional annotation cost. Hence, prior to the annotation process, identifying redundancy is a key step to avoid unnecessary cost. In this work, we proved that the coreset score based on cosine similarity (cossim) is effective for identifying redundant examples. This is because the collective magnitude of the gradient over redundant examples exhibits a large value compared to the others. As a result, contrastive learning first attempts to reduce the loss of redundancy. Consequently, cossim for the redundancy set exhibited a high value (low coreset score). We first viewed the redundancy identification as the gradient magnitude. In this way, we effectively removed redundant examples from two datasets (KITTI, BDD10K), resulting in a better performance in terms of detection and semantic segmentation. | Ju, Jeongwoo; Jung, Heechul; Kim, Junmo | Korea Adv Inst Sci & Technol, Div Future Vehicle, Daejeon 34141, South Korea; Captos Co Ltd, Yangsan 50652, South Korea; Kyungpook Natl Univ, Dept Artificial Intelligence, Daegu 41566, South Korea; Korea Adv Inst Sci & Technol, Sch Elect Engn, Daejeon 34141, South Korea | Jung, Heechul/HTL-7199-2023 | 55651859700; 55652175200; 36015494900 | veryju@kaist.ac.kr;heechul@knu.ac.kr;junmo.kim@kaist.ac.kr; | APPLIED SCIENCES-BASEL | APPL SCI-BASEL | 2076-3417 | 12 | 4 | SCIE | CHEMISTRY, MULTIDISCIPLINARY;ENGINEERING, MULTIDISCIPLINARY;MATERIALS SCIENCE, MULTIDISCIPLINARY;PHYSICS, APPLIED | 2022 | 2.7 | 46.1 | 0 | 2025-06-25 | 0 | 0 | deep learning; redundancy identification; convolutional neural network (CNN); semantic segmentation; object detection | Convolutional neural network (CNN); Deep learning; Object detection; Redundancy identification; Semantic segmentation | English | 2022 | 2022-02 | 10.3390/app12042201 | 바로가기 | 바로가기 | 바로가기 | 바로가기 |
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