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Dynamic Inertia Response Support by Energy Storage System with Renewable Energy Integration Substation

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Journal of Modern Power Systems and Clean Energy 2020年第2期8卷 260-266页

作者： Yeuntae yoo Seungmin Jung Gilsoo jang Korea University SeoulKorea Hanbat National University DaejeonKorea

In recent years,the expansion of renewable energy in electric power systems has been increasing at such a rapid pace that it has started affecting frequency *** generators connected to the grid produce variable amounts of power,and in most cases have no inherent inertia response(IR)to the system ***,the high penetration of renewable generators in the system results in low inertia and frequency *** renewable generators account for a high proportion of the supply in a power system,the use of energy storage systems(ESSs)with frequency-support algorithms(in the place of synchronous generators)can stabilize the *** participation of ESSs in frequency support must be organized precisely,so that they are fully devoted to their own *** this paper,the frequency-support parameters of ESSs are calculated for achieving stable frequency response from a *** estimation and calibration process is conducted during the active power-order change of the ESSs in the substation,and is verified through electromagnetic-transients-including-DC(EMTDC)-based simulations.

关键词： Energy storage system(ESS) frequency response inertia renewable energy substation

Statistics of oxidation resistance of Ni-(0-15)Co-(8-15)Cr-(0-5)Mo-(0-10)W-(3-8)Al-(0-5)Ti-(0-10)Ta-0.1C-0.01B superalloys at 1000℃ by compositional variations

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Rare Metals 2020年第8期39卷 918-927页

作者： Si-Jun Park Kyu-Hyuk Lee Seong-Moon Seo Hi-Won jeong Young-Soo yoo HeeJin jang Multi-Material Research Center Gwangju-Jeonnam DivisionKorea Automotive Technology InstituteGwangju 62207Republic of Korea Department of Advanced Materials Engineering Chosun UniversityGwangju 61452Republic of Korea High Temperature Materials Group Korea Institute of Materials ScienceChangwon 51508Republic of Korea Department of Materials Science and Engineering Chosun UniversityGwangju 61452Republic of Korea

The effects of alloying elements(Co,Cr,Mo,W,Al,Ti,and Ta)on the oxidation resistance of Ni-(0-15)Co-(8-15)Cr-(0-5)Mo-(0-10)W-(3-8)Al-(0-5)Ti-(0-10)Ta-0.1 C-0.01 B alloys were *** sample compositions were designed by the Box-Behnken method of design of experiments(DOE).The alloying elements show complicated effects on the mass gain due to oxidation,depending on the alloy *** reduces the mass gain *** other elements except Al do not appear to exert a strong effect on the oxidation rate on average,but their influences are shown clearly in the alloys with a low Al ***,W,and Ta reduce the oxidation rate,while Cr,Mo,and Ti promote *** is the most effective element in reducing the oxidation rate of the alloy with a low Al *** is confirmed that a continuous Al2O3 layer is essentially required for high oxidation *** oxide scale of easily oxidized alloys has various oxides such as NiCr2O4,NiAl2O4,NiO,Cr2O3,CrTaO4,and TiO2.

关键词： High temperature oxidation Alloy composition Ni-based superalloy Oxidation resistance Design of experiments

Infrageneric relationships of Korean Viola based on eight chloroplast markers

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Journal of Systematics and Evolution 2010年第6期48卷 474-481页

作者： Ki-Oug yoo Su-Kil jang Department of Biological Sciences Kangwon National University

Phylogeny and infrageneric relationships were reconstructed for Korean Viola(Violaceae) using eight chloroplast sequences:the atpB-rbcL intergenic spacer,the atpF-H intergenic spacer,the matK gene,the psbA-trnH intergenic spacer,the psbK-I intergenic spacer,the rpl16 intron,the rpoC1 exon 2,and the trnL-trnF *** combined analyses of the eight chloroplast regions suggest that sections Dischidium and Chamaemelanium are monophyletic,whereas section Nomimium is paraphyletic;sections Dischidium and Chamaemelanium form a clade with subsections Hypocarpae and Trigonocarpae of section Nomimium,but unresolved within the clade;two subsections(*** and Vaginatae) of section Nomimium form a clade and are placed between the stem and stemless species group;and subsection Patellares of section Nomimium is monophyletic,and Viola dissecta is diverged first in the clade with high support(BS = 100,PP = 100).Our present results support the subsectional grouping based on morphological characteristics,although discordance remained at the series level.

关键词： chloroplast DNA infrageneric relationships phylogeny series subsection Viola.

EP-Bot: Empathetic Chatbot Using Auto-Growing Knowledge Graph

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Computers, Materials & Continua 2021年第6期67卷 2807-2817页

作者： SoYeop yoo OkRan jeong Gachon University Seongnam-si13120Korea

People occasionally interact with each other through *** particular,we communicate through dialogue and exchange emotions and information from *** are essential characteristics of natural *** artificial intelligence is an integral part of all the technologies that allow computers to communicate like *** a computer to interact like a human being,it must understand the emotions inherent in the conversation and generate the appropriate ***,existing dialogue systems focus only on improving the quality of understanding natural language or generating natural language,excluding *** propose a chatbot based on emotion,which is an essential element in ***-Bot(an Empathetic PolarisX-based chatbot)is an empathetic chatbot that can better understand a person’s utterance by utilizing PolarisX,an autogrowing knowledge *** extracts new relationship information and expands the knowledge graph *** is helpful for computers to understand a person’s common *** proposed EP-Bot extracts knowledge graph embedding using PolarisX and detects emotion and dialog act from the *** it generates the next utterance using the ***-Bot could understand and create a conversation,including the person’s common sense,emotion,and *** verify the novelty and accuracy of EP-Bot through the experiments.

关键词： Emotional chatbot conversational AI knowledge graph emotion 1 Introduction

Saccharomyces boulardii as a single trigger of food protein-induced enterocolitis syndrome: Seven case reports

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World Journal of Clinical Cases 2025年第6期13卷 35-40页

作者： Jin-Bok Hwang Hyo-jeong jang Department of Pediatrics Keimyung University School of MedicineDongsan Medical CenterDaegu 42601South Korea

BACKGROUND Food protein-induced enterocolitis syndrome(FPIES)is the most serious type of non-immunoglobulin E(IgE)-mediated food allergic reaction manifesting as sepsis-like symptom,which can lead to *** boulardii(***),a probiotic prescribed frequently in clinical settings,has been reported to trigger FPIES in an infant with soy-triggered *** this report,we describe a new clinical FPIES in which *** was the sole triggering factor of acute FPIES adverse reaction in seven healthy *** SUMMARY Seven FPIES cases triggered by only *** were gathered from 2011 to the *** of the patients had previously experienced any allergic reaction to cow’s milk,soy,or complementary *** age of the patients was 4-10-months old,and the symptoms of FPIES developed after ingestion of ***,which is mostly prescribed for the treatment of gastroenteritis or antibiotic-associated *** patients experienced severe repetitive vomiting 1-3 hours after *** *** lethargy,marked pallor,and cyanosis were also *** IgE-mediated hypersensitivity developed in any *** was followed by initial intense vomiting in approximately 5-10 hours after *** ingestion,and only one case showed bloody,purulent,and foul-smelling *** patients stabilized quickly,mostly within 6 *** got all improved within 24 hours after discontinuation of *** *** can be the sole trigger of acute FPIES and be prescribed cautiously even in healthy children without FPIES.

关键词： Food protein-induced enterocolitis syndrome Food hypersensitivity Saccharomyces boulardii Probiotics Child Case report

Distributed Coordinator Election Scheme for QoS Support and Seamless Connectivity in WPANs

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Journal of Computer Science & Technology 2009年第6期24卷 1138-1148页

作者： Soon-Gyu jeong Sang-Jo yoo Graduate School of Information Technology & Telecommunications Inha University

Wireless personal area networks （WPANs） are formed in a relatively small area, and coordinator that serves as a central control device plays an important role in the operation and organization of a piconet. Typical applications of WPANs include home automation systems, security systems and health monitoring systems. In these types of systems, guaranteeing seamless connectivity is very important, and communications cannot take place when the coordinator malfunctions. Thus, in the case of a breakdown, it is necessary to elect a new coordinator as soon as possible. For this reason, a distributed coordinator election scheme （DCES） is proposed that considers not only QoS support but also network connectivity in an effort to avoid possible network partition. Simulation results show that the proposed scheme can elect a new coordinator while maintaining QoS and guaranteeing connectivity for a limited period.

关键词： QoS seamless connectivity leader election piconet coordinator (PNC) wireless personal area network (WPAN)

Ternary layered double hydroxide oxygen evolution reaction electrocatalyst for anion exchange membrane alkaline seawater electrolysis

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Journal of Energy Chemistry 2022年第12期75卷 127-134,I0004页

作者： yoo Sei Park Jae-Yeop jeong Myeong Je jang Chae-Yeon Kwon Geul Han Kim Jaehoon jeong Ji-hoon Lee Jooyoung Lee Sung Mook Choi Department of Hydrogen Energy Materials Surface&Nano Materials DivisionKorea Institute of Materials Science(KIMS)Changwon 51508Republic of Korea Department of Advanced Material Engineering Chungbuk National University1 Chungdae-roSeowon-guCheongjuChungbuk 28644Republic of Korea Department of Chemical Engineering University of WaterlooWaterlooOntario N2L 3G1 Canada School of Materials Science and Engineering Gyeongsang National UniversityJinju 52828Republic of Korea Department of Materials Science and Engineering Pusan National UniversityBusan 46241Republic of Korea Energy Industry Support Center Daegu Mechatronics&Materials InstituteDaegu 42704Republic of Korea Advanced Materials Engineering University of Science and Technology(UST)Yuseong-guDaejeon 34113Republic of Korea

Anion exchange membrane(AEM)water electrolyzers are promising energy devices for the production of clean hydrogen from ***,the lack of active and robust electrocatalysts for the oxygen evolution reaction(OER)severely impedes the development of this *** this study,a ternary layered double hydroxide(LDH)OER electrocatalyst(NiFeCo-LDH)is developed for high-performance AEM alkaline seawater *** AEM alkaline seawater electrolyzer catalyzed by the NiFeCo LDH shows high seawater electrolysis performance(0.84 A/cm^(2)at 1.7 Vcell)and high hydrogen production efficiency(77.6%at 0.5 A/cm^(2)),thus outperforming an electrolyzer catalyzed by a benchmark IrO_(2)*** NiFeCo-LDH electrocatalyst greatly improves the kinetics of the AEM alkaline seawater electrolyzer,consequently reducing its activation loss and leading to high *** on the results,this NiFeCo-LDH-catalyzed AEM alkaline seawater electrolyzer can likely surpass the energy conversion targets of the US Department of Energy.

关键词： Anion exchange membranes water electrolysis Oxygen evolution reactions Alkaline seawater electrolysis Hydrogen production

Hepatitis B virus reactivation in patients with hepatocellular carcinoma undergoing anti-cancer therapy

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World Journal of Gastroenterology 2014年第24期20卷 7675-7685页

作者： jeong Won jang Division of Hepatology Department of Internal MedicineCollege of MedicineThe Catholic University of KoreaSeoul 137-701South Korea

Patients with hepatocellular carcinoma (HCC) often experience hepatic morbidity. Hepatitis B virus (HBV) reactivation is well documented as a serious hepatic morbidity during anti-cancer therapy. Reported rates of HBV reactivation in chronic carriers with HCC undergoing chemotherapy range from 4%-67%. Apart from chemotherapy, HBV reactivation has been increasingly identified in settings of hepatectomy and local ablation therapies. The rates of HBV reactivation vary with different levels of immunosuppression and depend on treatment, viral factors, and patient characteristics. The principal concern relating to reactivation is that a substantial proportion of patients with reactivation suffer from liver dysfunction during therapy, which often leads to disruption of planned, potentially life-prolonging treatments, adversely affecting the patients’ final outcome. The first step in the management of HBV reactivation is identification of patients at risk of reactivation by testing for HBV serology prior to commencing anti-cancer therapy. Although it is a serious complication, HBV reactivation is preventable with prophylactic anti-HBV drugs. Multiple publications have shown the benefit of prophylactic or preemptive antiviral therapy in this setting and justified such an approach before the start of therapy. Given the tumors and underlying cirrhosis, long-term use of antivirals with high potency and low risk of resistance is recommended in patients with HCC. This topic review will summarize the epidemiology, pathogenesis, and clinical issues related to HBV reactivation in HCC patients, and will discuss proper management against HBV reactivation during anti-cancer therapy for HCC.

关键词： Hepatitis B virus Virus activation Hepatic morbidity Hepatocellular carcinoma Immunosuppression

Mismatching between nest volume and clutch volume reduces egg survival and fledgling success in black-tailed gulls

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Current Zoology 2016年第5期62卷 451-456页

作者： Who-Seung LEE jeong-Chil yoo Korea Institute of Ornithology and Department of Biology Kyung Hee University Seoul 02447 Korea Center for Stock Assessment Research University of California Santa Cruz Santa Cruz CA 95080 USA

A longstanding suggestion posits that parents prefer to match nest volume and clutch size （clutch volume）, but few studies have tested this in colonial seabirds that nest in the open. Here, we demonstrate the effects of nest-clutch volume matching on egg survival, hatching, and fledgling success in black-tailed gulls Larus crassirostris on Hongdo Island, Korea. We show that the volume mismatch, defined as the difference between nest volume and total egg volume （the sum of all eggs＇ volume in the clutch）, was positively related to egg and chick mortality caused by predation, but was not significantly related to hatching success incurred by insulation during the incubation period. Although nest volume was negatively related to laying date, we found that the mismatch was positively related to laying date. Our results support the claim that well-matched nest-clutch volume may contribute to survival of eggs and chicks, and ultimately breeding success.

关键词： black-tailed gulls clutch size egg survival fledgling success nest volume.