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장성욱(Sungwook Jang),김현수(Hyunsoo Kim) 한국자동차공학회 2000 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
In this paper, regenerative braking simulator (REGENSIM) is developed for a hybrid electric vehicle(HEV). In REGENSIM, every powertrain element of the HEV such as I.C engine, motor, battery, CVT and regenerative braking system is moded by a modular approach using AMESim. In addition, control algorithms for the regenerative braking and CVT system are also included. Simulation results show that battery sac is directly affected by the regenerative braking. It is expected that REGENSIM developed in this study can be used to design the regenerative braking system.
장성욱(Sungwook Jang),김달철(Talchol Kim),김현수(Hyunsoo Kim) 한국자동차공학회 2000 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
In this paper, regenerative braking system is developed for a hybrid electric vehicle. Regenerative braking system consists of BCU, hydraulic modulator and stroke simulator. In order to obtain a braking force,' a control algorithm is suggested. The hydraulic modulator modulates the brake pressure corresponding to the brake pedal operation. The stroke simulator is required to ensure the brake pedal operation felling. Using AMESim, dynamic models of a parallel hybrid vehicle with regenerative braking system are obtained including CVT. It is found from simulation results that the regenerative braking system works according to the control strategy, which promises an improved fuel economy of the HEV.
장성욱(Sungwook Jang) 한국디지털콘텐츠학회 2018 한국디지털콘텐츠학회논문지 Vol.19 No.1
A shared work platform is needed to legitimately activate shared works. To facilitate the use of copyrighted works by streamlining licensing procedures and by expressing and distributing the scope of use by authors themselves. In this study, five interface areas and fifteen evaluation items were selected to analyze the interface types and characteristics of the Korean shared work platform, and analyzed based on the national operating platform. We will analyze and compare the situation of the web interface of the Korean shared works by analyzing the types and characteristics of the web interface of the public opera platform, the Gongu-madang, Gonggong-nuri and private leader, Europeana.
우울 증상이 호전된 비우울 집단과 우울집단 간의 우울 기분 반응 양식의 비교
장세헌(Se-Heon Jang),장유경(Youkyung Jang),이대수(Daesoo Lee),제영묘(Youngmyo Je),홍성욱(SungWook Hong),윤창영(Changyoung Yun) 대한생물치료정신의학회 2007 생물치료정신의학 Vol.13 No.2
Objectives:Nolen-Hoeksema asserted that people have a consistent and unique response style to depression. The interpersonal differences in vulnerability and persisting time of depression can be explained by such a variability of interpersonal response style to depressive mood. We compared the differences of depressed mood response style between acutely remitted non-depressive group(n=28) and currently depressive group(n=18). We tried to investigate what kind of response style is most responsible for the remission and persisting of depression. Methods:We divided patients who were diagnosed as depression with ICD-10 criteria and being treated by pharmacotherapy into two groups by KDS(Korean Depression Scale). One is acutely remitted non-depressive group and another is currently depresssive group. And we checked depressed mood response style questionnaire(DMRQ). Results:There were significant differences in DMRQ subscales between two groups. Non-depressive group showed more problem-solving(t=2.325, sig.=.026), more mood-controlling(t=2.054, sig.=.046) and less ruminative(t=-3.619, sig.=.001) response style subscale than depressive group. There was no significant difference in the mood-avoiding response style(t=-1.406, sig.=.167). Conclusion:We concluded that problem-solving and mood controlling response styles can act as a mediator that decrease the severity of depression during treatment of depressive patients. On the while, the ruminative response style can be a mediator that persist depressive symptom and prohibit the recovery of patient from depression.
Jang, Jihwan,Lee, Jongtae,Choi, Yonghyun,Park, Sungwook Elsevier 2018 Science of the Total Environment Vol.644 No.-
<P><B>Abstract</B></P> <P>To analyze the effect of a gasoline particulate filter (GPF) attachment on the emissions of gasoline direct injection (GDI) vehicles, this study compares the emission results of three types of vehicles: conventional GDI vehicles, vehicles with a GPF at the close-couple catalytic converter (CCC), and vehicles with a GPF at the under-floor catalytic converter (UCC). Regulated particulate matter (PM) and particle number (PN) emitted from test vehicles were measured using gravimetric methods and condensation particle counter (CPC) equipment. In addition, this study analyzed nanoparticle size distribution, organic carbon (OC), elemental carbon (EC), and ammonia (NH<SUB>3</SUB>) using EEPS, OC-EC analyzer, and HFIR equipment. In cases of regulated particle emissions, both PM and PN satisfy EURO 6c and are reduced when a GPF is attached. Particulate emissions are especially reduced when the GPF is attached at the UCC position. This is believed to be why a soot layer is formed in stable flow. Emissions of nanoparticles and OC/EC are high in US06 mode at high driving speed. This is considered to be the influence of the regeneration of the GPF as the temperature of the exhaust gas rises. The emission of NH<SUB>3</SUB> is also highest in US06 mode, which is related to catalytic conversion efficiency.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Effects of GPF on particle and unregulated emissions were investigated. </LI> <LI> GPF reduced particle emissions effectively in GPF at UCC position. </LI> <LI> High emissions of NH<SUB>3</SUB> due to attachment of GPF were confirmed. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>