지진하중에 의한 구조물의 비선형 거동 예측

김희중,Kim, Hee Joong 한국강구조학회 1996 韓國鋼構造學會 論文集 Vol.8 No.4

The structural members under seismic loading actually show inelastic behavior, so the inelastic responses should be calculated for the seismic design of structures or estimating the structural damage level. Although direct time history analysis may calculate the exact dynamic nonlinear responses for given ground motions, this approach involves a high computational cost and long period. Therefore, it should be developed the approach to estimate nonlinear responses for the practical purpose. The artificial earthquake accelerograms were generated to obtain the smoothed responses spectra, and the samples of generated accelerogram for each seismic event was used to examine average nonlinear response spectra. The stabilized response spectra for each earthquake event was used to evaluate the effects of various yield strength ratios, damping values and nonlinear hysteretic models. The approach, which can simply predict the nonlinear seismic responses of structures, was shown in this study.

Actomyosin $Ca^{++}$ Activated Adenosinetriphosphatase 활성도에 대한 pH 및 온도의 영향

김희중,황애란,박양생,강두희,Kim, Hee-Joong,Hwang, Ae-Ran,Park, Yang-Saeng,Kang, Doo-Hee 대한생리학회 1977 대한생리학회지 Vol.11 No.2

The activity of the $Ca^{++}$ activated adenosinetriphosphatase (Ca-ATPase) of actomyosin systeme of rabbit and frog skeletal muscle has been studied at varying pH and temperature. The PH optima of the Ca-ATPase activity of the rabbit actomyosin was rather broad. Over the temperature range of $16-36^{\circ}C$ activity of the enzyme was not appreciably changed between pH 6.4-8.5; below and above which it rapidly reduced. The pH at the inflection point of the enzyme activity increased as temperature decreased, showing the ${\bigtriangleup}pH\;inflection/{\bigtriangleup}T$ of approximately $-0.018\;unit/^{\circ}C$. Consequently, $(OH^-)/(H^+)$ ratio at the inflection point was constant regardless of assay temperature. In the frog actomyosin systems the Ca-ATPase activity was not apparently altered between PH 6.4-7.0 when the incubation temperature was $15{\sim}30^{\circ}C$. Outside of this range of pH, however, the enzyme activity was dramatically decreased. The pH of the inflection point changed inversely with temperature. ${\bigtriangleup}pH\;inflection/{\bigtriangleup}T$ at the acidic side was approximately $-0.018\;unit/^{\circ}C$, whereas that at the alkaline side it was about $-0.037\;unit/^{\circ}C$. The Arrhenius Plot on the Ca-ATPase activity at constant $(OH^-)/(H^+)$ ratio of 1.0 was not linear, but showed break at arround $20^{\circ}C$ for both rabbit and frog actomyosin Preparations. From these results it was speculated that pH dependence of Ca-ATPase activity of rabbit actomyosin systems might reflect titrations of histidine-imidazole and -SH groups, and that of the frog actomyosin represents titrations of histidine-imidazole and lysyllysine ${\alpha}-NH_2$ groups.

Kim's Femoral Stem의 임상적 고찰

김영민(Young Min Kim),김희중(Hee Joong Kim),진종수(Jong Soo Jin),문영완(Young Wan Moon) 대한정형외과학회 1991 대한정형외과학회지 Vol.26 No.5

CO₂ laser조사가 성견치수에 미치는 영향에 관한 실험적 연구

김희중,이찬영,이승종,이정석,Kim, Hee-Joong,Lee, Chan-Young,Lee, Sung-Jong,Lee, Chung-Suck 대한치과보존학회 1988 Restorative Dentistry & Endodontics Vol.13 No.1

The object of this paper was to investigate the histopatological changes on dog's pulp under cavitation by irradiation of the $CO_2$ laser. The subjects were derived from four dogs, and irradiated 113.23 J/$mm^2$, 283.09 J/$mm^2$, 566.08 J/$mm^2$ in Group I, II, and III respectively. The dogs were sacrificed immediately, 24 hour, 72 hour and 1 week after $CO_2$ laser treatment. For light microscopic examination, routine H-E and PAS stains were employed. For electron microscopic observation, the teeth were fixed in 1% paraformaldehyde and 1% glutaraldehyde, decalcified teeth in 10% EDTA were stained by uranyl acetate and lead citrate. The observation was made with a Hitachi H-500 model electron microscope. The following results were obtained in this study: 1. At the early stage of the experimental sub-groups-immediately, 24 hour, 72 hour samples of Group I, II and III-coagulation necrosis and hyperemia were observed in odontoblastic and subodontoblastic pulpal layer. 2. At the 1 week sub-group of Group I, II, regenerative hyperplasia of the odontoblasts without coagulation necrosis were revealed, in addition to thickened predentin. On he other hand coagulation necrosis and atrophic change accompanying with hyperplasia were found at the 1 week sub-group of Group III. 3. Ultrastructurally, the odontoblasts appeared nuclear degeneration, vacuolar change of cytoplasmic organelles and rupture of plasma membrane at the early stage of the experimental period of all groups. 4. Under spectrohelioscopic examination, regenerative odontobalsts were seen at the 1 week specimens of Group I, II and III. 5. The pulpal response occured at 113-566 J/$mm^2$. The pathologic change of pulp tissue occured at the early experimental period but regeneration of odontoblasts could be seen after 1 week.

입자성 유기물의 안정동위원소비를 이용한 팔당호 수계내의 유기물 기원 연구

김희중 ( Hee-joong Kim ),김민섭 ( Min-seob Kim ),윤숙희 ( Suk-hee Yoon ),임보라 ( Bo-ra Lim ),김금희 ( Kum-hee Kim ),정현미 ( Hyen-mi Chung ),최종우 ( Jong-woo Choi ) 한국환경농학회 2018 한국환경농학회 학술대회집 Vol.2018 No.-

Organic carbon and nitrogen stable isotope ratios of particulate organic matter (POM) were determined at 7 stations (6 stations in Han river and Paldang dam outflow station) from May to October 2013, in order to understand the origin of POM at the Han river. δ¹³C values of POM in 7 stations were no significant changes season, but δ¹⁵N values were enriched in around Kyeongan stream (K). POC, PN and Chl-a concentration showed a similar seasonal pattern in Kyeongan stream, with an apparent decrease from July to August. POC and PN concentration has a higher correlation with Chl-a concentration in Kyeongan stream (K). δ¹³C and δ¹⁵N values of POM has a lighter value during lower Chl-a concentration period, compared to other seasons. Our results revealed that Kyeongan stream (K) seemed to be influenced by substantial amount of organic manure or fertilizer input in 2013, compared to the previous year (2012). These results suggest that the analysis of stable isotope ratios is a simple but useful tool for the identification of organic matter origin in aquatic environments.

Sustainable Synthetic Approaches of Polycaprolactones

Hee Joong Kim(김희중) 한국고분자학회 2023 한국고분자학회 학술대회 연구논문 초록집 Vol.48 No.1

고관절 대퇴 삽입물의 해리 판정에 있어 삽입물 주위 골밀도의 Transverse Histogram의 진단적 의의

김희중(Hee Joong Kim),김영민(Young Min Kim),강흥식(Heung Sik Kang),박건영(Kun Young Park),이성철(Sung Churl Lee),서중배(Joong Bae Seo) 대한정형외과학회 1993 대한정형외과학회지 Vol.28 No.2

『청춘』; 침몰하는 신앙의 배에 대한 이미지 연구 - 콘래드의 서사시적 요소를 중심으로

김희중 ( Kim Hee-joong ) 대한영어영문학회 2001 영어영문학연구 Vol.27 No.2

It has been said that the 『Youth』is a prelude of the 『Heart of Darkness』and 『Lord Jim』. Many critics are hesitated to put works of Conrad to the best literature in the world. But the work of 『Youth』of Conrad has been respected by many critics who have researched his works, because there are many metaphors of contemporary events in the view of faith. The work of 『Youth』has a many effects of epic such as a Christian ones which are compared to a sinking ship in the work of Conrad. The relations of a sinking ship and Christian epic effects are similar to the religious collapse of the early of 19C. The role of Marlow, the narrator of a youth in this work is used to symbolize the collapse of the Christ in nineteenth century. 『Youth』as a miniature epic of the nineteenth century establishes the story as a work possessing greater depth and subtlety than it has generally been granted. 『Youth』was supposed to give the note for 『Heart of Darkness』and 『Lord Jim』, and it does so by setting the cultural, intellectual, and spiritual stage for two works. Indeed, it is precisely the metaphorical events of 『Youth』-the termination of the age of faith, the passing of the naive, unconscious, unquestioning youth of Western culture-that thrust men like Marlow rudely into the world of metaphysical incertitude of other two works and set the scene for that quest for meaning in a god-for-shaken universe that was to characterize the modem waste land. < Yewon University >

전신성 홍반성 루푸스 환자에서 표피조직성분에 대한자가항체의 발현에 관한 연구

김희중(Hee Joong Kim),유대현(Dae Hyun Yoo),이창우(Chang Woo Lee) 대한피부과학회 2000 대한피부과학회지 Vol.38 No.4

N/A Background:Autoantibodies of heterogeneous specificities can be found in patients with SLE. Objective:We planned to examine the presence and frequency of anti-epidermal protein autoantibodies among patients with systemic lupus erythematosus (SLE). Patients:Thirty consecutive patients of SLE seen at the rheumatology section with no blistering lesions, who showed positive serological findings for anti-dsDNA antibody and high titers of antinuclear antibodies, were enrolled in this study. Methods:Indirect immunofluorescence study with normal human skin substrates and immunoblot assay using antigens obtained from A431 cell-extracts were performed with SLE sera. Results:Among the 30 patients of SLE, 2 had IgG autoantibodies that bound along the basement membrane zone of the skin in IIF. In the immunoblot assay, IgG bands reacting to 230kD and/or 180kD antigens were observed in 3 cases among the 30 SLE sera; additional IgA band reactivities against 230kD and 180kD were also seen in one of the above 3. Besides these autoantibodies, they had no other autoantibodies reacting to epidermal antigens. Conclusion:In this study, the frequency of serum autoantibodies to the epidermal proteins (bullous pemphigoid antigens and so on) among the patients with non-bullous SLE was estimated to be 10%-positivity. This result suggests that some patients with SLE may have autoantibodies to the epidermal basement membrane zone antigens with no pathogenecity. However, possible clinical significances should further be clarified. (Korean J Dermatol 2000;38(4):457~461)

H₂O₂ 주입과 온도변화가 열적 전처리 후 발생 슬러리의 CDOC 유기탄소분율에 미치는 영향평가

김희중(Hee Joong Kim),김태경(Tae Kyoung Kim),김연권(Youn Kwon Kim) 大韓環境工學會 2016 대한환경공학회지 Vol.38 No.3

최근 다양한 형태의 슬러지 최종처리 기술들이 제안되고, 기존 혐기성 소화공정에서 바이오가스 생산효율을 증가시키기 위한 전처리 기술들이 개발되어왔다. 이들 기술 중 열적전처리(Thermal pretreatment) 기술은 기존 슬러지 처리방법과 다르게 입자의 유기성 성분을 용해시킴으로써 슬러지 특성을 변화시켜 감량과 재이용이 가능한 전처리 기술이다. 그러나 대부분의 연구들은 높은 온도에서 입자의 가수분해, COD 가용화부분에 중점을 두고 연구 되어졌으며, 소수의 결과들만이 물리, 화학적 특성변화에 대해서 보고되었다. 본 연구는 열적전처리 효율에 영향을 미칠 수 있는 온도, 약품이 탄소원 형성과 분율에 미치는 영향을 알아보고자 하였다. 그 결과 반응온도가 증가함에 따라 입자의 가수분해 속도가 증가하였으며, 산화제의 주입량이 증가 할수록 고분자 유기성 물질은 감소하고 저분자 유기성 물질(분자량 350 g/mol 이하)의 분율이 증가하는 것을 확인할 수 있었다. 이번 실험결과는 슬러지 감량화 및 재이용를 위한 열적 전처리에 의한 분자의 특성을 파악하는데 기여할 수 있을 것이라 판단한다. Biogas yields point of view, the possibility of reusing excess sludge treated by thermal pretreatment for the purpose of improving the efficiency of the anaerobic digestion process has been investigated in recent year. Thermal pretreatment technology was considered as a pretreatment technique to improve excess sludge properties because of the solubilization of particulate organics. As a view point of sludge reduction and recycle, however, many researchers focused on the ability of particulate hydrolysis and COD solubilization under a high temperature, and few reports have addressed on the physical/chemical characteristics changing. This research was performed to evaluate the effects of a various temperature and chemical additives on carbon formation and fractionation in treated slurry from thermal pretreatment. Based on the results, it was revealed that oxidants injection and temperature changing have significantly caused the change of carbon fractions in slurry from thermal pretreament. Especially, it was considered that the efficiencies of particle hydrolysis increased with the increase of the reaction temperature. Low molecular weight(Mw < 350 g/mol) organic carbon formation increased with the increase of oxidants injection. It was expected that results of this research will provide an overview of the characteristics of thermal pretreatement for excess sludge reduction and recycle.