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Machine Learning-Based Detection and Selective Mitigation of Denial-of-Service Attacks in Wireless Sensor Networks

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Computers, Materials & Continua 2025年第2期82卷 2475-2494页

作者： Soyoung joo So-Hyun Park Hye-Yeon Shim Ye-Sol Oh Il-Gu lee Department of Future Convergence Technology Engineering Sungshin Women’s UniversitySeoul02844Republic of Korea

As the density of wireless networks increases globally, the vulnerability of overlapped dense wireless communications to interference by hidden nodes and denial-of-service (DoS) attacks is becoming more apparent. There exists a gap in research on the detection and response to attacks on Medium Access Control (MAC) mechanisms themselves, which would lead to service outages between nodes. Classifying exploitation and deceptive jamming attacks on control mechanisms is particularly challengingdue to their resemblance to normal heavy communication patterns. Accordingly, this paper proposes a machine learning-based selective attack mitigation model that detects DoS attacks on wireless networks by monitoring packet log data. Based on the type of detected attack, it implements effective corresponding mitigation techniques to restore performance to nodes whose availability has been compromised. Experimental results reveal that the accuracy of the proposed model is 14% higher than that of a baseline anomaly detection model. Further, the appropriate mitigation techniques selected by the proposed system based on the attack type improve the average throughput by more than 440% compared to the case without a response.

关键词： Distributed coordinated function mechanism jamming attack machine learning-based attack detection selective attack mitigation model selective attack mitigation model selfish attack

The Influx of the Tsushima Current into the Central Ulleung Basin of East Sea (Sea of Japan), Korea

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Acta Geologica Sinica(English Edition) 2014年第6期88卷 1846-1851页

作者： young-Suk BAK Seong-joo lee The Earth and Environmental System Research Center Chonbuk National University Department of Geology Kyungpook National University

A total of 85 samples, collected from the UBGH1-9 core taken from the Ulleung Basin, East Sea, Korea, were analyzed using diatom assemblages. 111 diatom species belonging to 46 genera were identified, and three diatom assemblage zones were established on the basis of occurrence and distribution pattern of diatoms. Diatom assemblage zone I（134.10–174 m） is characterized by a relatively high abundance of marine species, while the increased number of the brackish species is recorded in diatom assemblage zone II（75–125 m）. The assemblage zones IIIa became drastic drop of valve abundances and brackish planktons, whereas it became increase during the IIIb. High Td values which indicate an influence of warm current are recorded both in diatom assemblage zone I and III, and low Td values in diatom assemblage zone II. Analysis of diatom assemblages indicating that the depositional condition moved from oceanic to littoral-neritic environments and that paleotemperature underwent a shift from warm to cold condition at the middle interval, and from cold to warm condition in the upper interval of the UBGH1-9 core. This suggests that the lower（130–162 m） and upper intervals（0–20 m） of the UBGH1-9 core were deposited in the warm current condition（Tsushima Warm Current）.

关键词： assemblage depositional littoral drastic genera abundance oceanic Korea valve preservation

Advancements in hemostatic strategies for managing upper gastrointestinal bleeding: A comprehensive review

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World Journal of Gastroenterology 2024年第15期30卷 2087-2090页

作者： Ah young lee joo young Cho Division of Gastroenterology Department of Internal MedicineCha Gangnam Medical CenterCha University College of MedicineSeoul 06135Korea

Upper gastrointestinal(GI)hemorrhage presents a substantial clinical *** management typically involves resuscitation and endoscopy within 24 h,although the benefit of very early endoscopy(leeding,preventing rebleeding,and using a multimodal approach encompassing endoscopic,pharmacological,angiographic,and surgical *** agents such as vasopressin,prostaglandins,and proton pump inhibitors are effective,but the increase in antithrombotic use has increased GI bleeding *** hemostasis,particularly for nonvariceal bleeding,employs techniques such as electrocoagu-lation and heater probes,with concerns over tissue injury from monopolar *** methods such as Hemospray and Endoclot show promise in creating mechanical tamponades but have ***,the first-line therapy includes thermal probes and hemoclips,with over-the-scope clips emerging for larger ulcer *** gold probe,combining bipolar electrocoagulation and injection,offers targeted coagulation but has faced device-related *** advancements involve combining techniques and improving endoscopic imaging,with studies exploring combined approaches showing *** research is crucial for developing standardized and effective hemorrhage management strategies.

关键词： Upper gastrointestinal bleeding Hemostasis Endoscopy Probe Spray Clip

Deformation prediction of porcelain-enameled steels with strain history by press forming and high-temperature behavior of coating layer

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中国有色金属学会会刊：英文版 2012年第S3期22卷 838-844页

作者： young-Ki SON Chan-joo lee Jung-Min lee Byung-Min KIM School of Mechanical Engineering Pusan National University Dongnam Regional Division Korea Institute of Industrial Technology

Porcelain enamel coatings were widely applied for the protection of steel products because they offered high corrosion protection,resistance to heat and abrasion,high hardness,hygiene and ease of *** typical process to produce enameled steels is roughly divided into two stages:the first stage consists of a forming process to give the desired shape to a steel substrate,and the second stage consists of a firing process to bond enamel frits on the *** firing process requires a high temperature above 800 °C,which may lead to austenitic transformation and severe thermal deformation of the steel *** aim of this study is to develop a finite element analysis (FE analysis) technique to predict the mechanical and thermal deformations of the enameled steels during forming and any further enameling process,including *** FE analysis involves analyzing the strain history of the steel substrate,which comprises the stress and thickness distributions of the substrate and its deformed shape,and the high-temperature behavior of the enamel coating *** validity of the FE analysis is verified through the U-bending test and firing test with various numbers and positions of enamel coating layers on the *** results reveal that the FE analysis results agree well with the experimental results with 8% error.

关键词： porcelain enamel firing process finite element analysis enameled steel thermal deformation

Some remarks on one-sided regularity

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Frontiers of Mathematics in China 2018年第4期13卷 833-847页

作者： Tai Keun KWAK Yang lee young joo SEO Department of Mathematics Daejin University Pocheon 11159 Korea Institute of Basic Science Daejin University Pocheon 11159 Korea Department of Mathematics Hanyang University Seoul 04763 Korea

A ring is said to be right （resp., left） regular-duo if every right （resp., left） regular element is regular. The structure of one-sided regular elements is studied in various kinds of rings, especially, upper triangular matrix rings over one-sided Ore domains. We study the structure of （one-sided） regular-duo rings, and the relations between one-sided regular-duo rings and related ring theoretic properties.

关键词： right (left) regular element right (left) regular-duo ring uppertriangular matrix ring right (left) Ore domain

Observational Study of Surface Wind along a Sloping Surface over Mountainous Terrain during Winter

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Advances in Atmospheric Sciences 2018年第3期35卷 276-284页

作者： young-Hee lee Gyuwon lee Sangwon joo Kwang-Deuk AHN Department of Astronomy and Atmospheric Sciences Kyungpook National University Numerical Data Application Division Numerical Modeling Center

The 2018 Winter Olympic and Paralympic Games will be held in Pyeongchang, Korea, during February and March. We examined the near surface winds and wind gusts along the sloping surface at two outdoor venues in Pyeongchang during February and March using surface wind data. The outdoor venues are located in a complex, mountainous terrain, and hence the near-surface winds form intricate patterns due to the interplay between large-scale and locally forced winds. During February and March, the dominant wind at the ridge level is westerly; however, a significant wind direction change is ob- served along the sloping surface at the venues. The winds on the sloping surface are also influenced by thermal forcing, showing increased upslope flow during daytime. When neutral air flows over the hill, the windward and leeward flows show a significantly different behavior. A higher correlation of the wind speed between upper- and lower-level stations is shown in the windward region compared with the leeward region. The strong synoptic wind, small width of the ridge, and steep leeward ridge slope angle provide favorable conditions for flow separation at the leeward toot of the ridge. The gust factor increases with decreasing surface elevation and is larger during daytime than nighttime. A significantly large gust factor is also observed in the leeward region.

关键词： flow separation gust factor leeward region sloping surface

Clinical diagnostic advances in intestinal anastomotic techniques:Hand suturing,stapling,and compression devices

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World Journal of Gastrointestinal Surgery 2024年第5期16卷 1231-1234页

作者： Ah young lee joo young Cho Division of Gastroenterology Department of Internal MedicineCha Gangnam Medical CenterCha University College of MedicineSeoul 06135South Korea

The development of intestinal anastomosis techniques,including hand suturing,stapling,and compression anastomoses,has been a significant advancement in surgical *** methods aim to prevent leakage and minimize tissue fibrosis,which can lead to stricture *** healing process involves various phases:hemostasis and inflammation,proliferation,and *** staplers and sutures can cause inflammation and fibrosis due to the release of profibrotic *** anastomosis devices,including those made of nickel-titanium alloy,offer a minimally invasive option for various surgical challenges and have shown safety and ***,despite advancements,anastomotic techniques are evaluated based on leakage risk,with complications being a primary *** devices like Magnamosis use magnetic rings for compression anastomosis,demonstrating greater strength and patency compared to *** technology is also being explored for other medical *** there are promising results,particularly in animal models,the realworld application in humans is limited,and further research is needed to assess their safety and practicality.

关键词： Anastomoses Diagnostic advances,Anastomotic techniques Technique Intestine

Plasmid DNA-loaded asymmetrically porous membrane for guided bone regeneration

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Journal of Materials Science & Technology 2021年第4期63卷 161-171页

作者： Se Heang Oh June-Ho Byun So young Chun young-joo Jang Jin Ho lee Department of Nanobiomedical Science Dankook UniversityCheonan 31116Republic of Korea Department of Oral and Maxillofacial Surgery Gyeongsang National University School of MedicineGyeongsang National University HospitalInstitute of Health SciencesGyeongsang National UniversityJinju 52727Republic of Korea BioMedical Research Institute Kyungpook National University HospitalDaegu 41404Republic of Korea Department of Advanced Materials Hannam UniversityDaejeon 34054Republic of Korea

Although bone defects can be restored spontaneously,bone reconstruction with sufficient strength and volume continues to be a challenge in clinical *** recent years,the use of a variety of biomaterials with bioactivity has been attempted to compensate for this ***,we fabricated a pDNA(encoding for BMP-2)-loaded asymmetrically porous polycaprolactone(PCL)/Pluronic F127 membrane as a bioactive guided bone regeneration(GBR)membrane,using a modified immersion-precipitation *** was observed that the GBR membrane allows continuous release of pDNA for more than20 *** pDNA was sufficiently transfected into human bone marrow stem cells(h BMSCs)without significant cytotoxicity and the gene-transfected cells showed prolonged synthesis of *** in vitro osteogenic differentiation and in vivo animal studies,the effective induction of osteogenic differentiation of h BMSCs and enhanced bone regeneration by the pDNA-loaded asymmetrically porous PCL/Pluronic F127 membrane was observed,suggesting that the pDNA-loaded membrane as a bioactive GBR membrane can be an alternative therapeutic technique for effective bone regeneration.

关键词： loaded porous attempted

Indolocarbazole-Based Small Molecule Cathode-Active Material Exhibiting Double Redox for High-Voltage Li-Organic Batteries

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Energy & Environmental Materials 2024年第5期7卷 86-94页

作者： Hyunji Park Hyojin Kye Jong-Sung lee young-Chang joo Dong joo Min Bong-Gi Kim Soo young Park Ji Eon Kwon Laboratory for Supramolecular Optoelectronic Materials(LSOM) Department of Materials Science and EngineeringResearch Institute of Advanced Materials(RIAM)Seoul National University1 Gwanak-roGwanak-guSeoul 08826Korea Functional Composite Materials Research Center Jeonbuk Institute of Advanced Composite MaterialsKorea Institute of Science and Technology(KIST)92 Chudong-roBongdong-eupWanju-gunJeonbuk 55324Korea Department of Organic and Nano System Engineering Konkuk University120 Neungdong-roGwangjin-guSeoul 05029Korea Department of Materials Science and Engineering Seoul National University1 Gwanak-roGwanak-guSeoul 08826Korea Department of JBNU-KIST Industry Academia Convergence Research Jeonbuk National University567 Baekje-daeroDeokjin-guJeonjuJeonbuk 54896Korea

Most organic electrode materials(OEMs)for rechargeable batteries employ n-type redox centers,whose redox potentials are intrinsically limited<3.0 V versus Li^(+)/***,p-type materials possessing high redox potentials experience low specific capacities because they are capable of only a single redox reaction within the stable electrochemical window of typical ***,we report 5,11-diethyl-5,11-dihydroindolo[3,2-b]carbazole(DEICZ)as a novel p-type OEM,exhibiting stable plateaus at high discharge potentials of 3.44 and 4.09 V versus Li^(+)/***,the second redox potential of DEICZ is within the stable electrochemical *** mechanism of the double redox reaction is investigated using both theoretical calculations and experimental measurements,including density functional theory calculations,ex situ electron spin resonance,and X-ray photoelectron ***,hybridization with single-walled carbon nanotubes(SWCNT)improves the cycle stability and rate performance of DEICZ owing to theπ-πinteractions between the SWCNT and co-planar molecular structure of DEICZ,preventing the dissolution of active materials into the *** DEICZ/SWCNT composite electrode maintains 70.4%of its initial specific capacity at 1-C rate and also exhibits high-rate capability,even performing well at 100-C ***,we demonstrate its potential for flexible batteries after applying 1000 bending stresses to the composite electrode.

关键词： composite electrodes flexible batteries indolocarbazoles organic rechargeable batteries p-type