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Map-based control method for vehicle stability enhancement

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Journal of Central South University 2015年第1期22卷 114-120页

作者： moon-Young Yoon Seung-Hwan Baek Kwang-Suk Boo Heung-Seob kim Graduate school of Mechanical Engineering Inje University 607 High Safety Vehicle Core Technology Research Center Inje University 607

This work proposes a map-based control method to improve a vehicle's lateral stability, and the performance of the proposed method is compared with that of the conventional model-referenced control method. Model-referenced control uses the sliding mode method to determine the compensated yaw moment; in contrast, the proposed map-based control uses the compensated yaw moment map acquired by vehicle stability analysis. The vehicle stability region is calculated by a topological method based on the trajectory reversal method. A 2-DOF vehicle model and Pacejka's tire model are used to evaluate the proposed map-based control method. The properties of model-referenced control and map-based control are compared under various road conditions and driving inputs. Model-referenced control uses a control input to satisfy the linear reference model, and it generates unnecessary tire lateral forces that may lead to worse performance than an uncontrolled vehicle with step steering input on a road with a low friction coefficient. However, map-based control determines a compensated yaw moment to maintain the vehicle within the stability region,so the typical responses of vehicle enable to converge rapidly. The simulation results with sine and step steering show that map-based control provides better the tracking responsibility and control performance than model-referenced control.

关键词： model-referenced control map-based control vehicle stability yaw moment

Metabolic syndrome, lifestyle risk factors, and distal colon adenoma: A retrospective cohort study

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World Journal of Gastroenterology 2011年第35期17卷 4031-4037页

作者： moon-Chan kim Chang-Sup kim Tae-Heum Chung Hyoung-Ouk Park Cheol-In Yoo Department of Family Medicine Ulsan University Hospital University of Ulsan College of Medicine Ulsan 682-714 South Korea Department of Occupational and Environmental Medicine Ulsan University Hospital

AIM: To investigate relationships between colorectal adenoma incidence, metabolic syndrome (MS) components and lifestyle factors. METHODS: We conducted a retrospective cohort study using data from individuals who had multiple sigmoidoscopies for colon cancer at the Health Promotion Center of Ulsan University Hospital in Korea from 1998 to 2007. RESULTS: By multivariate analysis, the incidence of distal colon adenoma was increased by more than 1.76 times in individuals with at least one component of MS compared to those without a component of MS. After adjustment for age, gender, smoking, drinking, and physical exercise, only high body mass index (BMI) was significantly associated with the incidence of distal colon adenoma (Hazard ratio 1.66, 95% confidence interval 1.05-2.62). CONCLUSION: Our results suggest that high BMI may increase the risk of colorectal adenoma in Korean adults.

关键词： Body mass index Distal colon adenoma Korea Lifestyle risk factor Metabolic syndrome

Effect of preparation method of noble metal supported catalyts on formaldehyde oxidation at room temperature: Gas or liquid phase reduction

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Journal of Environmental Sciences 2022年第12期34卷 201-216页

作者： Younghee Jang Ye Hwan Lee Hanki Eom Sang moon Lee Sung Su kim Department of Environmental Energy Envineering Graduate School of kyonggi UniversityGyeonggi-do 16227Korea Department of Environmental Energy Engineeing Kyonggi UniversityGyonggi-do 16227Korea

Formaldehyde(HCHO) is toxic to the human body and is one of the main threats to the indoor air quality(IAQ). As such, the removal of HCHO is imperative to improving the IAQ,whereby the most useful method to effectively remove HCHO at room temperature is catalytic oxidation. This review discusses catalysts for HCHO room-temperature oxidation,which are categorized according to their preparation methods, i.e., gas-phase reduction and liquid-phase reduction methods. The HCHO oxidation performances, structural features,and reaction mechanisms of the different catalysts are discussed, and directions for future research on catalytic oxidation are reviewed.

关键词： Formaldehyde Indoor air quality Catalyst Prepared method

In?uence of Carbon Equivalent Value on the Weld Bead Bending Properties of High-Strength Low-Alloy Steel Plates

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Journal of Materials Science & Technology 2017年第4期33卷 321-329页

作者： Ki Hyuk kim In Jun moon Ki Won kim Ki Bong Kang Byung Gyu Park Kwang Seok Lee R&D Center of Dongkuk Steel Mill Co. Ltd Pohang 790-729 South Korea Korea Institute of Materials Science Implementation Research Division Materials Deformation Department 797 Changwondaero Changwon Gyeongnarn642-831 South Korea

The contribution of chemical compositions in terms of carbon equivalent value（CEV） on impending crack propagation during weld bead bend tests（WBBTs） was studied with five different high-strength lowalloy steel plates that underwent different rolling processes. The test showed that cracks developed at the weld joint, easily passed through the coarse-grain heat-affected zone（CGHAZ）, and finally were arrested within the heat-affected zone（HAZ）. An apparent decrease in the average crack length, which consequently indicated improvement in crack arrestability, was found with decreasing CEV. In addition,the relatively fine microstructure in the HAZ of low-CEV steel plates helped in preventing the crack from further propagation. Special emphasis was placed on the empirical expectation of critical CEV above which WBBT might fail.

关键词： Mechanical characterization Steel Welding Fracture Crack arrestability against bending

Extremely rare case of necrotizing gastritis in a patient with autoimmune hepatitis: A case report

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World Journal of Clinical Cases 2021年第14期9卷 3472-3477页

作者： Seung Ki moon Jeong-Ju Yoo Sang Gyune kim Young Seok kim Department of Internal Medicine Soonchunhyang University Bucheon HospitalBucheon 14584South Korea Department of Gastroenterology and Hepatology Soonchunhyang University School of MedicineBucheon 14584South Korea

BACKGROUND Autoimmune hepatitis can cause liver fibrosis,liver cirrhosis,and hepatocellular *** treatment option include the use of steroids and/or immunesuppressive agents such as ***,these drugs have some side ***,close follow-up is needed during ***,we present an extremely rare case of a patient with an autoimmune hepatitis who died from necrotizing gastritis during immunosuppressive *** SUMMARY A 52-year-old female patient was diagnosed with autoimmune *** treated this patient with immunosuppressive ***-dose steroid treatment was initially *** azathioprine treatment was added while steroid was *** weeks after the start of treatment,she visited the emergency room due to generalized abdominal pain and *** computed tomography scan,the patient was diagnosed with necrotizing gastritis and the patient progressed to septic *** for sepsis was continued in the intensive care ***,the patient died at 6 h after admission to the emergency *** In patients with autoimmune infections undergoing immunosuppressant therapy,rare complications such as necrotizing gastritis may occur,thus requiring clinical attention.

关键词： Autoimmune hepatitis Azathioprine Case report

Utilizing 3,4-ethylenedioxythiophene(EDOT)-bridged non-fullerene acceptors for efficient organic solar cells

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Journal of Energy Chemistry 2022年第2期31卷 194-204页

作者： Sung Jae Jeon Young Hoon kim Ie Na kim Nam Gyu Yang Ji Hee Yun Doo Kyung moon Nano and Information Materials(NIMs)Laboratory Department of Chemical EngineeringKonkuk University120 Neungdong-ro Gwangjin-guSeoul 05029South Korea Department of Academy of Applied Science and Technology Konkuk University120 Neungdong-ro Gwangjin-guSeoul 05029South Korea

A rational design of efficient low-band-gap non-fullerene acceptors(NFAs)for high-performance organic solar cells(OSCs)remains challenging;the main constraint being the decrease in the energy level of the lowest unoccupied molecular orbitals(LUMOs)as the bandgap of A-D-A-type NFAs ***,the short current density(J_(sc))and open-circuit voltage(V_(oc))result in a trade-off relationship,making it difficult to obtain efficient ***,three NFAs(IFL-ED-4 F,IDT-ED-4 F,and IDTT-ED-2 F)were synthesized to address the above-mentioned issue by introducing 3,4-ethylenedioxythiophene(EDOT)as aπ-*** NFAs exhibit relatively low bandgaps(1.67,1.42,and 1.49 eV,respectively)and upshifted LUMO levels(-3.88,-3.84,and-3.81 eV,respectively)compared with most reported low-band-gap ***,the photovoltaic devices based on IDT-ED-4 F blended with a PBDB-T donor polymer showed the best power conversion efficiency(PCE)of 10.4%with a high J_(sc) of 22.1 mA cm^(-2) and Voc of 0.884 V among the examined *** contrast,IDTT-ED-4 F,which was designed with an asymmetric structure of the D-p-A type,showed the lowest efficiency of 1.5%owing to the poor morphology and charge transport properties of the binary ***,when this was introduced as the third component of the PM6:BTP-BO-4 Cl,complementary absorption and cascade energy-level alignment between the two substances could be ***,the IDTT-ED-4 F-based ternary blend device not only improved the Jscand Voc,but also achieved a PCE of 15.2%,which is approximately 5.3%higher than that of the reference device with a minimized energy loss of 0.488 *** addition,the universality of IDTT-ED-2 F as a third component was effectively demonstrated in other photoactive systems,specifically,PM6:BTPe C9 and PTB7-Th:IEICO-4 *** work facilitates a better understanding of the structure–property relationship for utilizing efficient EDOT-bridged NFAs in high-performance OSC applications.

关键词： Non-fullerene acceptor 3,4-ethylenedioxythiophene Organic solar cell π-bridge π-spacer

Evolution of systemic therapy for advanced-stage hepatocellular carcinoma

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Hepatobiliary Surgery and Nutrition 2022年第6期11卷 899-902页

作者： moon Haeng Hur Yoon Jun kim Department of Internal Medicine and Liver Research Institute Seoul National University College of MedicineSeoulKorea

Since the introduction of sorafenib in 2007(1),a tyrosine kinase inhibitor(TKI),there have been notable advancements in systemic therapy for advanced-stage hepatocellular carcinoma(HCC).Although the European Association for the Study of the Liver(EASL)Clinical Practice Guidelines regarding the management of HCC was published in 2018(2),recent progress,including the advent of several immune checkpoint inhibitors(ICIs),necessitated the revision of this ***,the EASL published a position paper to address the additional improvements on systemic therapy for HCC(3).Here,we aimed to summarize this position paper and comment on some updated points.

关键词： hepatocellular Liver Clinical

Invasive and non-invasive diagnosis of cirrhosis and portal hypertension

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World Journal of Gastroenterology 2014年第15期20卷 4300-4315页

作者： moon Young kim Woo Kyoung Jeong Soon Koo Baik Department of Internal Medicine Yonsei University Wonju College of MedcineWonju Severance Christan HospitalWonju 220-701South Korea Department of Radiology and Center for Imaging Science Samsung Medical CenterSungkyunkwan University School of MedicineSeoul 440-746South Korea

With advances in the management and treatment of advanced liver disease,including the use of antiviral therapy,a simple,one stage description for advanced fibrotic liver disease has become *** refining the diagnosis of cirrhosis to reflect disease heterogeneity is essential,current diagnostic tests have not kept pace with the progression of this new *** biopsy and hepatic venous pressure gradient measurement are the gold standards for the estimation of hepatic fibrosis and portal hypertension(PHT),respectively,and they have diagnostic and prognostic ***,they are invasive and,as such,cannot be used repeatedly in clinical *** ideal noninvasive test should be safe,easy to perform,inexpensive,reproducible as well as to give numerical and accurate results in real *** should be predictive of long term outcomes related with fibrosis and PHT to allow prognostic ***,many types of noninvasive alternative tests have been developed and are under *** particular,imaging and ultrasound based tests,such as transient elastography,have shown promising *** most of these noninvasive tests effectively identify severe fibrosis and PHT,the methods available for diagnosing moderate disease status are still insufficient,and further investigation is essential to predict outcomes and individualize therapy in this field.

关键词： Hepatic fibrosis Portal hypertension Liver biopsy Hepatic venous pressure gradient Non-invasive test Transient elastography

HARQ Optimization for PDCP Duplication-Based 5G URLLC Dual Connectivity

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Computers, Materials & Continua 2022年第7期72卷 727-738页

作者： Changsung Lee Junsung kim Jaewook Jung Jungsuk Baik Jong-moon Chung Samsung Research Seoul06765Korea Samsung Electronics Suwon16677Korea School of Electrical and Electronic Engineering Yonsei UniversitySeoul03722Korea

Packet duplication(PD)with dual connectivity(DC)was newly introduced in the 5G New Radio(NR)specifications to meet the stringent ultra reliable low latency communication(URLLC)*** technology uses duplicated packets in the packet data convergence protocol(PDCP)layer that are transmitted via two different access nodes(ANs)to the user equipment(UE)in order to enhance the reliability ***,PD can result in unnecessary retransmissions in the lower layers since the hybrid automatic retransmission request(HARQ)operation is unaware of the transmission success achieved through the alternate DC link to the *** overcome this issue,in this paper,a novel duplication-aware retransmission optimization(DRO)scheme is proposed to reduce the resource usage induced by unnecessary HARQ *** proposed DRO scheme can minimize the average channel use while satisfying the URLLC *** proposed DRO scheme derives the optimal HARQ retransmission attempts for different ANs by solving a nonlinear integer programming(NLIP)*** performance of the proposed DRO scheme was evaluated using MATLAB simulation and is compared to the existing 5G HARQ support *** simulations results show that the proposed DRO scheme can provide a 14.71%and 15.11%reduced average channel use gain compared to the selective data duplication upon failure(SDUF)scheme and latency-aware dynamic multi-connectivity algorithm(LADMA)scheme,respectively,which are the existing 5G PD schemes that use HARQ.

关键词： 5G networks URLLC dual connectivity retransmission packet duplication