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Suboptimal Feature Selection Techniques for Effective Malicious Traffic Detection on Lightweight Devices

Computer Modeling in Engineering & Sciences 2024年第8期140卷 1669-1687页

作者： So-Eun Jeon Ye-Sol Oh yeon-ji lee Il-Gu lee Department of Future Convergence Technology Engineering Sungshin Women’s UniversitySeoul02844Korea Department of Convergence Security Engineering SungshinWomen’s UniversitySeoul02844Korea

With the advancement of wireless network technology,vast amounts of traffic have been generated,and malicious traffic attacks that threaten the network environment are becoming increasingly *** signature-based detection methods,static analysis,and dynamic analysis techniques have been previously explored for malicious traffic detection,they have limitations in identifying diversified malware traffic *** research has been focused on the application of machine learning to detect these ***,applying machine learning to lightweight devices like IoT devices is challenging because of the high computational demands and complexity involved in the learning *** this study,we examined methods for effectively utilizing machine learning-based malicious traffic detection approaches for lightweight *** introduced the suboptimal feature selection model(SFSM),a feature selection technique designed to reduce complexity while maintaining the effectiveness of malicious traffic *** performance was evaluated on various malicious traffic,benign,exploits,and generic,using the UNSW-NB15 dataset and SFSM sub-optimized hyperparameters for feature selection and narrowed the search scope to encompass all *** improved learning performance while minimizing complexity by considering feature selection and exhaustive search as two steps,a problem not considered in conventional *** experimental results showed that the detection accuracy was improved by approximately 20%compared to the random model,and the reduction in accuracy compared to the greedy model,which performs an exhaustive search on all features,was kept within 6%.Additionally,latency and complexity were reduced by approximately 96%and 99.78%,respectively,compared to the greedy *** study demonstrates that malicious traffic can be effectively detected even in lightweight device *** verified the possibility of detecting various attack

关键词： Feature selection lightweight device machine learning Internet of Things malicious traffic

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An Effective Threat Detection Framework for Advanced Persistent Cyberattacks

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Computers, Materials & Continua 2023年第5期75卷 4231-4253页

作者： So-Eun Jeon Sun-jin lee Eun-Young lee yeon-ji lee Jung-Hwa Ryu Jung-Hyun Moon Sun-Min Yi Il-Gu lee Department of Future Convergence Technology Engineering Sungshin Women’s UniversitySeoul02844Korea Department of Convergence Security Engineering Sungshin Women’s UniversitySeoul02844Korea

Recently,with the normalization of non-face-to-face online environments in response to the COVID-19 pandemic,the possibility of cyberattacks through endpoints has *** endpoint devices are managed meticulously to prevent cyberattacks and ensure timely responses to potential security *** particular,because telecommuting,telemedicine,and teleeducation are implemented in uncontrolled environments,attackers typically target vulnerable endpoints to acquire administrator rights or steal authentication information,and reports of endpoint attacks have been increasing *** persistent threats(APTs)using various novel variant malicious codes are a form of a sophisticated ***,conventional commercial antivirus and anti-malware systems that use signature-based attack detectionmethods cannot satisfactorily respond to such *** this paper,we propose a method that expands the detection coverage inAPT attack *** this model,an open-source threat detector and log collector are used synergistically to improve threat detection *** the scope of attack log collection through interworking between highly accessible open-source tools can efficiently increase the detection coverage of tactics and techniques used to deal with APT attacks,as defined by MITRE Adversarial Tactics,Techniques,and Common Knowledge(ATT&CK).We implemented an attack environment using an APT attack scenario emulator called Carbanak and analyzed the detection coverage of Google Rapid Response(GRR),an open-source threat detection tool,and Graylog,an open-source log *** proposed method expanded the detection coverage against MITRE ATT&CK by approximately 11%compared with that conventional methods.

关键词： Advanced persistent threat cybersecurity endpoint security MITRE ATT&CK open-source threat detector threat log collector

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Text-mining analysis using national R&D project data of South Korea to investigate innovation in graphene environment technology

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International Journal of Innovation Studies 2023年第1期7卷 87-99页

作者： ji yeon lee Jung Woo Choi Jae-Hak Choi Byeong-Hee lee NTIS Center Korea Institute of Science and Technology InformationDaejeon34141South Korea Department of Science and Technology Management Policy University of Science and TechnologyDaejeon34113South Korea Department of Polymer Science and Engineering Chungnam National UniversityDaejeon34134South Korea

This study investigates the possibilities offered by the development of graphene environment technology that can contribute to new and effective approaches for the transition to an ecologically benign *** analyze the research and development progress in graphene environment technology,graphene environment technology research trends of South Korea for the years 2009e2020 are investigated by acquiring information pertaining to national research and development projects related to graphene environment technology from the National Science and Technology Information *** structured and unstructured data are analyzed using diverse text-mining methods,such as keyword frequency analysis,association rule mining,and topic *** results indicate that graphene research in South Korea is focused primarily on graphene use in batteries and energy-storage devices,such as solar cells,fuel cells,and secondary *** study can help understand the manner by which the South Korean government has been investing in the research and development of graphene environment technology;additionally,it discusses the future applications and prospects of graphene for the next decade.

关键词： Graphene technology Environmental transition National R&D project information Text mining Trend analysis

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朗文新托福考试听力特训

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丛书名：大愚文化英语学习丛书,新托福备考系列丛书

2010年

作者： (韩)ji-yeon lee

本书完全按照新托福考试要求进行编写，旨在帮助考生提高听力专项技能。书中涵盖了新托福听力测试的全部题型，并提供大量的练习供考生进行自测。

ISBN: (数字)9787802561618

ISBN: (纸本)9787802561618

关键词：朗文新托福考试听力特训

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Migration routes and differences in migration strategies of Whooper Swans between spring and autumn

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Avian Research 2023年第3期14卷 345-353页

作者： ji-yeon lee Hyung-Kyu Nam jin-Young Park Seung-Gu Kang Nyambayar Batbayar Dong-Won Kim Jae-Woong Hwang Otgonbayar Tsend Tseveenmyadag Natsagdorj Jugdernamjil Nergui Tuvshintugs Sukhbaatar Wee-Haeng Hur Jeong-Chil Yoo The Korea Institute of Ornithology and Department of Biology Graduate SchoolKyung Hee University26 Kyungheedae-roDongdaemun-guSeoul02447Republic of Korea National Institute of Biological Resources 42 Hwangyeong-roSeo-guIncheon22689Republic of Korea Endangered Species Research Center National Institute of EcologyYeongyang36351Republic of Korea Wildlife Sciences and Conservation Center of Mongolia Union BuildingB-701UNESCO str.Ulaanbaatar14210Mongolia

Long-distance migratory birds travel more rapidly in spring than in autumn,as they face temporal breeding ***,several species travel slower in spring owing to environmental influences,such as food availability and wind *** trackers were attached to 17 Whooper Swans(Cygnus cygnus) inhabiting northeastern Mongolia,to determine their migration routes and stopover sites in spring and *** between spring and autumn migrations,migration-influencing parameters,and the effect of spring stopover site temperatures were *** swans completed perfect tours between their wintering and breeding sites,and these data were used for *** migration lasted 57 days,with 49.2 days spent at 3.7 stopover *** migration lasted 21.5 days,with 17.5 days spent at 1.0 stopover ***,the swans traveled more rapidly in autumn than in *** distance,number of stopovers,migration speed,and straightness were important migration determinants in both spring and *** distance,stopover duration,number of stopovers,daily travel speed,travel duration,and migration speed differed significantly between spring and *** spring migration,the temperature at the current stopover sites and that at the future stopover sites displayed significant variations(t=1585.8,df=631.6,p <0.001).These findings are critical for the conservation and management of Whooper Swans and their key habitats in East Asian regions,and the data are anticipated to make a particularly significant contribution toward developing detailed management plans for the conservation of their key habitats.

关键词： Key stopover sites Migration characteristics Migration route Migration strategy Tracking Whooper Swan

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Aligned Ion Conduction Pathway of Polyrotaxane‑Based Electrolyte with Dispersed Hydrophobic Chains for Solid‑State Lithium–Oxygen Batteries

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Nano-Micro Letters 2025年第2期17卷 169-186页

作者： Bitgaram Kim Myeong‑Chang Sung Gwang‑Hee lee Byoungjoon Hwang Sojung Seo ji‑Hun Seo Dong‑Wan Kim Department of Materials Science and Engineering Korea University145 Anam‑RoSeongbuk‑GuSeoul 02841Republic of Korea School of Civil Environmental and Architectural EngineeringKorea University145 Anam‑RoSeongbuk‑GuSeoul 02841Republic of Korea Materials Science and Chemical Engineering Center Institute for Advanced Engineering(IAE)Yongin 17180Republic of Korea

A critical challenge hindering the practical application of lithium–oxygen batteries(LOBs)is the inevitable problems associated with liquid electrolytes,such as evaporation and safety *** study addresses these problems by proposing a modified polyrotaxane(mPR)-based solid polymer electrolyte(SPE)design that simultaneously mitigates solvent-related problems and improves ***-SPE exhibits high ion conductivity(2.8×10^(−3)S cm^(−1)at 25℃)through aligned ion conduction pathways and provides electrode protection ability through hydrophobic chain *** this mPR-SPE into solid-state LOBs resulted in stable potentials over 300 *** situ Raman spectroscopy reveals the presence of an LiO_(2)intermediate alongside Li_(2)O_(2)during oxygen *** situ X-ray diffraction confirm the ability of the SPE to hinder the permeation of oxygen and moisture,as demonstrated by the air permeability *** present study suggests that maintaining a low residual solvent while achieving high ionic conductivity is crucial for restricting the sub-reactions of solid-state LOBs.

关键词： Solid polymer electrolyte Lithium-oxygen batteries Polyrotaxane ion conductivity Hydrophobic chain

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Clinical efficacy of 0.05%cyclosporine nano-emulsion in the treatment of dry eye syndrome associated with meibomian gland dysfunction

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International Journal of Ophthalmology(English edition) 2022年第12期15卷 1924-1931页

作者： yeon ji Jo ji Eun lee Jong Soo lee Efficacy of nano-cyclosporine to DES with MGD 1 Department of Ophthalmology Pusan National University School of Medicine&Medical Research InstitutePusan National University HospitalPusan 49241Republic of Korea Department of Ophthalmology Pusan National University School of Medicine&Medical Research CenterYangsan Pusan National University HospitalYangsan 626-770Republic of Korea

AIM:To evaluate the clinical efficacy of topical 0.05%cyclosporine nano-emulsion in the treatment of dry eye syndrome(DES)with meibomian gland dysfunction(MGD).METHODS:This prospective study included 64 patients with DES and MGD who were randomly assigned to three groups:Group 1(n=24,conventional cyclosporine),Group 2(n=21,nano-emulsion cyclosporine),and Group 3(n=19,control).Lid margin telangiectasia(LMT),meibomian gland secretion(MGS),conjunctival injection(CI),corneal staining(CS),tear break-up time(TBUT),Schirmer test I(STI),Ocular Surface Disease Index(OSDI),and lipid layer thickness(LLT)was evaluated at 4,8,and 12wk of ***:In Group 3(control),LMT,CS,and CI improved after 8wk,MGS,TBUT after 12wk of *** Group 1(conventional cyclosporine),LMT,MGS,and TBUT improved significantly after 4wk,whereas CS,CI,STI,and LLT improved significantly after 8wk,and OSDI at *** Group 2(nano-cyclosporine),LMT,MGS,CS,CI,TBUT,and OSDI significantly improved after 4wk,and STI after ***,LLT was significantly higher than other groups after ***:Cyclosporine and nano-cyclosporine shows significant improvement in DES with MGD than the control *** contrast,the nano-cyclosporine group shows more statistically improved CI and CS at 4wk,especially LLT at 4,8,and 12wk compared to the conventional cyclosporine group.

关键词： anti-inflammatory treatment cyclosporine dry eye disease meibomian gland dysfunction

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Effects of dietary high dose DHA omega-3 supplement in dry eye with meibomian gland dysfunction

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International Journal of Ophthalmology(English edition) 2021年第11期14卷 1700-1706页

作者： yeon ji Jo Jong Soo lee Department of Ophthalmology Pusan National University School of Medicine&Medical Research Institute of Pusan National University HospitalBusan 49241Republic of Korea

AIM:To evaluate the clinical efficacy of dietary supplement of high dose DHA omega-3 in dry eye with meibomian gland dysfunction(MGD).METHODS:Prospective randomized double-masked,placebo-controlled clinical trial was conducted in mild to moderate dry eye patients with *** have no history of taking any dietary omega-3 supplements before 3 *** were divided into two groups:24 patients in the omega-3 group and 26 patients in the placebo *** omega-3 group received two capsules of Easyeye Dry?,total containing 600 mg of EPA and 1640 mg of DHA,while the placebo group received two capsules containing 3000 mg of olive *** patients take two pills once a *** examination of MGD scores,tear break-up time(TBUT),corneal staining test(NEI),strip meniscometry(SM tube),and ocular surface disease index(OSDI)scores were performed at baseline,after 4 and 8 ***:A total of 50 patients were *** were no differences in baseline characteristics between the two groups,such as age,sex,and other ocular examination *** TBUT,NEI,and OSDI scores significantly improved after 4 and 8 wk in both *** after 8 wk TBUT(6.00±1.62 s vs 5.08±1.28 s,P=0.034)and MGD score(7.2±1.8 vs 8.1±2.6,P=0.033)in the omega-3 group was more significantly improved than that of the placebo ***:Dry eye with the MGD patient,a high dose of DHA omega-3 dietary supplement can improve TBUT and MGD score after 8 wk,effective in stabilizing the tear film.

关键词： DHA dietary supplement dry eye disease meibomian gland dysfunction

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Aluminum doping for optimization of ultrathin and high-k dielectric layer based on SrTiO3

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Journal of Materials Science & Technology 2020年第7期42卷 28-37页

作者： ji-Ye Baek Le Thai Duy Sang yeon lee Hyungtak Seo Department of Energy Systems Research Ajou UniversitySuwon 443-749South Kore Department of Materials Science and Engineering Ajou UniversitySuwon 443-749South Korea

An ultrathin SrTiO3 dielectric layer is optimized through Al doping to solve the problems existing in development of ultra-high-k oxide MOS *** post-deposition annealing,Al doping induces changes in the electronic structure of SrTiO3,thereby effectively reducing leakage current to 80) of ultrathin SrTMO3 MOS *** titanate(SrTiO3) is a high-k material but its bandgap is smaller than that of other oxide dielectrics(e.g.,SiO2,Al2 O3).Consequently,an ultrathin SrTiO3 film may have a high tunneling leakage current,which is not suitable for capacitor-based *** improve the performance of metal-oxide-semiconductor(MOS) capacitors using SrTiO3,an approach based on homogenous and uniform aluminum doping to SrTiO3 through co-sputtering is *** bandgap of a pristine SrTiO3 film showed an increase of 0.5 eV after Al ***,Al doping decreased the leakage current of SrTiO3/Si-based MOS capacitors by more than five orders of magnitude(at the level of nanoampere per square centimeter).Importantly,a dielectric constant of 81.3 and equivalent oxide thickness less than 5 A were achieved in an 8-nm-thick Al-doped SrTiO3 film owing to changes in its crystal structure and conduction band edge electronic ***,the obtained data show the effectiveness of the proposed approach for solving the problems existing in the development of ultra-high-k oxide MOS capacitors.

关键词： Aluminum doping SrTiO3 ultrathin High dielectric constant MOS capacitors

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Risks of non-conservative design according to ASME B31.1 for high-temperature piping subjected to long-term operation in the creep range

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Nuclear Science and Techniques 2019年第5期30卷 59-69页

作者： Hyeong-yeon lee Seok-Kwon Son Min-Gu Won ji-Young Jeong Korea Atomic Energy Research Institute National Fusion Research Institute School of Mechanical Engineering Sungkyunkwan University

This study investigates the risks of non-conservative piping design according to ASME B31.1 for hightemperature piping subjected to long-term operation at high temperature in a creep regime based on a sensitivity analysis of the hold time. Design evaluations of hightemperature piping were conducted over a range of hold times in the creep regime according to ASME B31.1,which implicitly considers the creep effects, and the French high-temperature design code of the RCC-MRx, which explicitly considers the creep effects. Conservatisms were quantified among the codes in terms of the hold times. In the case of B31.1, the design evaluation results do not change depending on the hold time at high temperature,whereas in the case of RCC-MRx, they do. It was shown that the design limits of RCC-MRx were exceeded when the hold time exceeded certain values, whereas those of B31.1 were satisfied regardless of the hold times. Thus, the design evaluations according to B31.1 did not consistently yield conservative results and might lead to non-conservative results in the case of long-term operations in the creep range.

关键词： ASME B31.1 Creep Hold time Hightemperature piping RCC-MRx Sensitivity analysis

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