kim, poo keun

학위논문(석사)아주대학교 산업대학원 :기계공학과,2008. 8국문요약 = i Abstract = iii List of tables = ⅶ List of figures = ⅷ I. 서론 = 1 1.1 연구배경 = 1 1.2 이론적 배경 = 4 1.2.1 이론 공기량 = 4 1.2.2 가솔린 기관의 유해 배출가스 생성 = 5 1.2.2.1 일산화탄소(CO) = 5 1.2.2.2 탄화수소 (HC) = 7 1.2.2.3 질소산화물 (NOx) = 8 1.2.2.4 가솔린 기관의 작동 조건과 유해물질 배출의 상관성 = 10 1.2.3 국내 및 국외의 유해 배출가스 허용 기준 비교 = 12 1.2.4 CO₂ 규제 = 13 1.2.5 HEV(Hybrid Electric Vehicle)의 특성 = 15 1.2.5.1 Series type HEV = 16 1.2.5.2 Parallel type HEV (Soft type HEV) = 17 1.2.5.3 Split type HEV (Hard type HEV) = 18 II. 실험 장치 및 방법 = 20 2.1 실험 장치 = 20 2.1.1 실험 차량 = 20 2.1.2 실험 Chamber system = 21 2.1.2.1 Hot/cold chamber system = 21 2.1.2.2 Chassis dynamometer system = 23 2.1.2.3 Exhaust gas analysis system = 24 2.1.2.4 CVS system (CVS 7200S) = 27 2.2 실험 방법 = 28 2.2.1 CVS-75 mode = 28 2.2.2 실험 방법 = 29 2.2.2.1 상온(25℃)에서 실험 방법 = 31 2.2.2.2 저온(-18℃)에서 실험 방법 = 31 III. 실험결과 및 고찰 = 34 3.1 CO₂ 배출량 비교 = 34 3.1.1 상온에서 실시간 CO₂ 배출량 비교 = 34 3.1.2 상온과 저온의 CO₂ 배출량 비교 = 37 3.2 상온과 저온의 CO 배출량 비교 = 39 3.3 상온과 저온의 HC 배출량 비교(NMHC) = 41 3.4 상온과 저온의 NOx 배출량 비교 = 43 Ⅳ. 결론 = 45 References = 47Maste

Late Quaternary chronology of long piston core sediment from the Korea Plateau in the East Sea (Sea of Japan)

The East Sea (Sea of Japan) is connected with the neighboring seas through the four straits characterized by shallow water depth, causing the distinct environmental variation contrasted between interglacial and glacial conditions. During the glacial period, the topographic restriction by eustatic sea-level lowering results in a lake-type oceanographic setting where the dark laminated mud (DLM) layer formed and the negative shift of planktonic foraminiferal 18O values occurred. These paleoceanographic features widely obtained as the inter-basinal scale also indicate the usefulness of chronological criteria. The great thickness of the late Quaternary sediments in the Ulleung Basin, characterized by dominant mass-flow deposits and lack of hemipelagic deposition, limits the temporal span of paleoceanographic reconstruction. A 11-m long piston-core sediments collected from the topographic-high Korea Plateau (about 1400 m deep) have been analyzed through a variety of approaches for the reconstruction of late Quaternary chronology. Normal 14C age dates, identification of tephra layer, oxygen isotope stratigraphy, and the correlation of DLM were applied to obtain the precise chronostratigraphy. Four distinct DLM layers were well preserved to show the consistent geochemical characteristics. Two 14C age dates and AT tephra layer signify the clear identification of first DLM during the last glacial period. In addition, the other DLM layers reflect the same condition for the formation, corresponding to the glacial stages. The planktonic foraminiferal 18O values also confirm the negative excursion during the stage 6. Thus, these core sediments are likely preserve more-than 250-ky paleoclimatic history in the East Sea (Sea of Japan).1

Oxygen Isotope Profile and Age Determination of Venus Clam Mercenariastimpsoni (Bivalvia: Veneridae) from the East Sea

22othe

Magnetostratigraphy and Paleoproductivity of Late Holocene Marine Sediments in the Eastern Bransfield Basin, Antarctic Peninsula

During the 9th (1995-1996) KARP (Korean Antarctic Research Program) Expedition, a laminated diatom-rich sediment core (A9-EB2) was obtained from the eastern Bransfield Basin, Antarctic Peninsula region. Total organic carbon (TOC) and magnetic susceptibility (MS) in the core sediments clearly record the oscillation of depositional conditions. In particular, the high-resolution MS variation is a distinct feature to differentiate the high MS values for terrigenous (low TOC) hemiperagic part from the low values for biogenic pelagic (high TOC) part. In contrast to the anoxic condition under which the deep-sea laminated structures in the Santa Barbara Basin can be preserved completely without the obliteration by active bioturbation, the oscillatory MS feature in the Bransfield Basin may be attributed to the climatically-forced and enhanced productivity cycles and less dilution of terrrigenous particles. In spite of poor chronology due to the lack of available data as well as some contaminated datings, the core A9-EB2 shows the cyclic pattern of paleoproductivity in terms of MS signals which has been maintained in the Bransfield Basin, Antarctica during the late Holocene.22Nothe

Flux variation and sources of eolian dust at IODP Exp. 320 site U1333 in the east equatorial Pacific during the Oligocene-Miocene Transition

2

Seawater d180 and water mass identification in the western Weddell Sea, Antarctic Ocean

22othe

Rate of Shoreline Changes for Barrier Islands in Nakdong Estuary Using GIS and Remote Sensing

원격탐사를 이용한 울타리섬의 해안선 변화율을 산정하고 장기간의 이동경향을 제시하였다. 1975년부터 2001년까지 총 6회 촬영된 항공사진과 2002년부터 2009년까지 촬영된 SPOT-5 위성영상 6매를 사용하여 울타리섬의 해안선을 추출한 후 GIS를 이용한 수치 해안선 분석 시스템을 사용하여 SCE, NSM, EPR, LRR, LMS와 같은 5종류의 해안선 변화율을 산정하였다. 진우도의 서측 꼬리는 점차 확장되고 있고 서측은 후진, 남측은 전진, 동측은 후진하는 양상을 보이고 2000년대에 들어 변화율이 점차 커지고 있으며 섬의 동측은 전진중이다. 해안선 변화율은 -2.5~6.7m/yr의 범위로 나타난다. 신자도의 경우 서측은 외해방향으로 전진하고 동측은 육지방향으로 후퇴하는 반시계방향의 이동성이 나타난다. 울타리섬이 현재와 비슷한 형태로 완성된 이후로 서측은 안정되어가고 있으나 동측은 빠르게 육지방향으로 후퇴하고 있으며 전체적인 해안선 변화율의 범위는 -16.0~12.0m/yr 정도이다. 도요등은 과거 백합등으로부터 현재의 도요등으로 완성되기까지 31.5m/yr 로 남진하였다. 도요등이 현재와 같은 형태를 보인 이후로 남측은 -18.2m/yr로 후퇴하고 있으며 섬의 동,서측은 13.5~14.3m/yr 의 속도로 점차 확대되고 있다. 수치 해안선 분석 시스템을 사용하여 SCE, NSM, EPR, LRR, LMS와 같은 5종류의 해안선 변화율을 산정하였다. 진우도의 서측 꼬리는 점차 확장되고 있고 서측은 후진, 남측은 전진, 동측은 후진하는 양상을 보이고 2000년대에 들어 변화율이 점차 커지고 있으며 섬의 동측은 전진중이다. 해안선 변화율은 -2.5~6.7m/yr의 범위로 나타난다. 신자도의 경우 서측은 외해방향으로 전진하고 동측은 육지방향으로 후퇴하는 반시계방향의 이동성이 나타난다. 울타리섬이 현재와 비슷한 형태로 완성된 이후로 서측은 안정되어가고 있으나 동측은 빠르게 육지방향으로 후퇴하고 있으며 전체적인 해안선 변화율의 범위는 -16.0~12.0m/yr 정도이다. 도요등은 과거 백합등으로부터 현재의 도요등으로 완성되기까지 31.5m/yr 로 남진하였다. 도요등이 현재와 같은 형태를 보인 이후로 남측은 -18.2m/yr로 후퇴하고 있으며 섬의 동,서측은 13.5~14.3m/yr 의 속도로 점차 확대되고 있다.2

Oxygen lsotope Data of Winter Water in the Western Weddell Sea: Preliminary Results

22othe

Seasonal and interannual variability in sinking particle fluxes in the 10°N thermocline ridge area of the northeastern equatorial Pacific

The influence of ENSO variability on sinking particle fluxes was evaluated from time-series sediment trap experiments carried out for 8 years at a station located in the 10°N thermocline ridge of the northeastern equatorial Pacific. Six El Niño/La Niña events were observed over the monitoring period. During the normal periods, sinking particle fluxes had distinct seasonal fluctuations, with high fluxes in winter-spring and low values in summer-fall. This seasonal variability was caused by seasonal shifts in the location of the intertropical convergence zone (ITCZ). A weak(2004/05) and moderate(2006/07) El Niño events were accompanied by a significant reduction of sinking particle fluxes. In contrast, La Niña(2007/08) was associated with an increase in sinking particle fluxes to a level of three times higher than that during the normal periods. These results are consistent with the results of previous studies in the equatorial Pacific. However, the strong El Niño events(1997/98 and 2009/10) caused three-fold increase of sinking particle fluxes compared to the average particle flux during the normal period, which is completely opposite to the general trend observed in the equatorial Pacific. The chemical composition of settling material quite differences between two strong El Niño events.x El Niño/La Niña events were observed over the monitoring period. During the normal periods, sinking particle fluxes had distinct seasonal fluctuations, with high fluxes in winter-spring and low values in summer-fall. This seasonal variability was caused by seasonal shifts in the location of the intertropical convergence zone (ITCZ). A weak(2004/05) and moderate(2006/07) El Niño events were accompanied by a significant reduction of sinking particle fluxes. In contrast, La Niña(2007/08) was associated with an increase in sinking particle fluxes to a level of three times higher than that during the normal period2