대상회전 기타 피질이 손상된 흰쥐들의 행동 변화

김정진,김종규,김명석,Kim, Chung-Chin,Kim, Jong-Kyu,Kim, Myung-Suk 대한생리학회 1968 대한생리학회지 Vol.2 No.2

A study was planned to evaluate the effects of removal of the cingulate cortex upon the occurrence of any behavior commonly displayed by the rat, and to compare the effects of cingulectomy with those of removal of the parietal, parieto-occipital, or occipital regions. The subjects were 54 male albino rats (Holtzman strain, body weight $200{\sim}330\;gm$) including 14 rats in which the cingulate gyri between splenium and genu of the corpus callosum were bilaterally ablated by suction (cingulate group), 9 animals which had their parietal cortices (chiefly area 7) partially removed (parietal group), 9 rats whose parietal and occipital regions (chiefly areae 7 & 17), 13 animals in which the occipital cortices (chiefly area 17) were removed bilaterally (occipital group), and 9 normal rats (normal control group). Eighteen observation cages, each of which housed a subject and was provided with food and water ad lib., were arranged in 6 rows on a rack and the behavior of each subject was scanned by an observer at a distance of 1.5 m from the rack. The observer scanned the first and second rows 6 times in 1 min, then proceeded to the 3rd and 4th rows, scanning for another 1 min, and finally to the 5th and 6th rows. The speed of scanning was such that behavioral observations of all of the 18 rats were completed in 3 min, each subject receiving 6 observations. The scanning was repeated every 3 min for 18 min, which constituted one observation session and was followed by a 72 minutes' recess. The whole procedure was repeated through 24 hours so that a total of 576 behavioral observations were made on each subject in 16 observation sessions. Behaviors checked were sleeping, lying, lying and sniffing, standing, standing and sniffing, exploring, eating, drinking, grooming (included were washing, licking, and scratching), and others. Results obtained were as follows: 1. The cingulate group ate significantly more often than the normal control, the parietal, and the parieto-occipital groups. 2. Exploration was significantly less frequent in the cingulate group than in the normal control, the parietal, and the occipital groups. There was, in the case of the cingulate group, a significant negative correlation between the occurrence of eating and the exploratory activity. 3. The general activity, as judged from the value obtained by adding the occurrence of exploration, eating, drinking, grooming, and standing and sniffing, was significantly increased in the cingulate group compared with those of any other groups including the normal control. 4. Though statistically insignificant, the cingulate group slept least often among all the animal groups tested. 5. The parieto-occipital group tended to groom less, and the parietal group to eat less often than the normal control group did, but the difference was not significant. There were no significant differences among all the groups except the cingulate group as regards other behaviors analyzed. Based on the above results, it was inferred that the cingulate cortex exerts an inhibitory influence upon the occurrence of eating and general activity, while it tends to facilitate the occurrence of sleep.

플라이애시 활용에 의한 콘크리트의 $CO_2$ 저감기술

김정진,Kim, Jeong-Jin 한국건설순환자원학회 2011 한국건설순환자원학회지 Vol.6 No.3

에코콘크리트 현장 적용에 따른 강도 상승 효과 및 이산화탄소 절감 효과에 관한 연구

김정진,황인성,이상현,위준우,Kim, Jeong-Jin,Hwang, Yin-Seong,Lee, Sang-Hyun,We, Joon-Woo 한국건설순환자원학회 2011 한국건설순환자원학회지 Vol.6 No.1

본 연구는 콘크리트에 사용되는 시멘트를 대체할 수 있는 혼화재에 관한 것으로 산업부산물인 고로슬래그 미분말 및 석회석 미분말 등을 결합재로 하여 일반 포틀랜드시멘트에 비하여 이산화탄소 배출량이 적은 결합재이다. 또한 기존 고로슬래그 미분말의 보통 포틀랜드 시멘트 치환시 발생되는 초기강도 저하현상 및 한랭기 및 동절기 저온 환경에서 발생하는 강도 저하 현상을 개선한 탄소배출 저감형 결합재이다. 보통포틀랜드 시멘트와 비교하여 양생 재령에 상관없이 동등 이상의 강도 발현이 가능하므로 계절별 기후에 상관없이 현장에 적용할 수 있으며, 경제성 측면에서도 보통포틀랜드시멘트보다 저렴하여 이점이 있다. 또한 이산화탄소 배출량을 비교하였을 때 EM은 보통포틀랜드시멘트에 비하여 약 38%, EM를 사용한 콘크리트의 경우 약 8%의 저감효과가 있는 것으로 확인되었다. Blast furnance slag cement is a cement manufactured with using industrial by-product and it can reduce $CO_2$ by replacing cement when same uit volume concrete is produced. But Blast furnance slag has a short point that early strength of concrete is not good in winter season and it can be used. So, in this study, as long as replacement ratio of Blast furnance slag to original portland cement is under 30%, developed cement, ecoment, improve early strength of concrete and it applied to constructoin site. As a result, it improves 37% in terms of 1-day strength, it reduces 6.7% in terms of $CO_2$ emission when $1m^3$ concrete was produced. The importance and applicability of study wll be expected to increase cosidering global effort and green growth-strategy in country for reducing greenhouse gases.

초고층 건축공사의 양중계획 시스템에 관한 연구

김정진,최인성,Kim, Jung-Jin,Choi, In-Sung 한국건축시공학회 2005 한국건축시공학회지 Vol.5 No.4

A systematic hoisting planning for tower crane is the most important elements in highrise building construction. However without sufficient data, systematic approach, it is not with ease to produce an appropriate planning at the rite. Therefore, this research aims at developing a systematic hoisting planning system in visual graphic with systematic procedure. The result of this research is that developed system on hoisting load calculation, numbers and specification of tower cranes are graphically visualized easily at the site. The study of applying this system to real project proves that it presents a sufficient capability as a useful tool in the hoisting planning of highrise building projects.

불안장애의 분자유전학적 이해

김정진,Kim, Jung-Jin 대한불안의학회 2007 대한불안의학회지 Vol.3 No.1

Anxiety disorder is likely caused by an interaction of multiple loci in brain, rather than a single locus. Hyperactive neurotransmitter circuits between the cortex, thalamus, amygdala, and hypothalamus are responsible for production of anxiety symptoms. Familial studies performed on anxiety disorder suggested that anxiety disorder should be caused by genetic etiology. Numerous linkage and association studies showed different genetic loci of anxiety disorder. Candidate genes have been focused on important neurotransmitters, neuropeptide, or genes affecting neuronal growth, development, protection or apoptosis. Anxiety disorder has various symptoms and comorbid diseases in family or proband. Therefore, further studies focused on symptomatic dimension of anxiety disorder or responses to drugs are required.

Al의 열산화 방법을 이용한 AlGaN/GaN 구조의 표면 Al₂O₃ 패시베이션 효과

김정진,안호균,배성범,박영락,임종원,문재경,고상춘,심규환,양전욱,Kim, Jeong-Jin,Ahn, Ho-Kyun,Bae, Seong-Bum,Pak, Young-Rak,Lim, Jong-Won,Moon, Jae-Kyung,Ko, Sang-Chun,Shim, Kyu-Hwan,Yang, Jeon-Wook 한국전기전자재료학회 2012 전기전자재료학회논문지 Vol.25 No.11

Surface passivation of AlGaN/GaN heterojunction structure was examined through the thermal oxidation of evaporated Al. The Al-oxide passivation increased channel conductance of two dimensional electron gas (2DEG) on the AlGaN/GaN interface. The sheet resistance of 463 ohm/${\Box}$ for 2DEG channel before $Al_2O_3$ passivation was decreased to 417 ohm/${\Box}$ after passivation. The oxidation of Al induces tensile stress to the AlGaN/GaN structure and the stress seemed to enhance the sheet carrier density of the 2DEG channel. In addition, the $Al_2O_3$ films formed by thermal oxidation of Al suppressed thermal deterioration by the high temperature annealing.

잔골재율의 변화가 유동성 섬유보강 콘크리트의 직접인장 및 휨인장 거동에 미치는 영향

김정진,김동주,조현우,강수태 한국구조물진단유지관리학회 2011 한국구조물진단학회 학술발표회논문집 Vol.2011 No.9

본 연구에서는 잔골재율(S/a)의 변화가 고강도 강섬유를 사용한 섬유보강 콘크리트의 직접인장 및 휨인장 거동에 미치는 영향을 평가하였다. 잔골재율은 0.444, 0.515, 0.615로 변화하였고, 세가지 종류의 고강도 강섬유(smooth, hooked, twisted Fiber)를 부피비로 1.0% 보강하였다. 잔골재율이 증가함에 따라 섬유보강 콘크리트의 유동성은 증가하였지만 직접인장 또는 휨인장 강도가 저하하는 경향을 보였다. 잔골재율이 증가할수록 콘크리트와 섬유 사이 계면에서의 공극이 증가하여 부착강도가 저하되었지 때문으로 판단된다.

전 척추 전.후 방향 검사 시 AEC Mode와 Fix Mode에서 PC-Based Monte Carlo Program을 이용한 장기선량 및 유효선량 평가

김정진,장성원,박장흠,이관섭,하동윤,Kim, Jeong Jin,Jang, Seong Won,Park, Jang Heum,Lee, Kwan Seob,Ha, Dong Yoon 대한디지털의료영상학회 2012 대한디지털의료영상학회논문지 Vol.14 No.2

There are AEC mode and fix mode to exposure when the whole spine antero-posterior radiography is done by using DR equipment. This study compared the utility of fix mode to AEC mode, by evaluating organ dose and effective dose and by examining the quality of radiographic image. GE DEFINIUM 8000 and ART-200X Rando Phantom manufactured by Flukebiometical were used for this study. The Rando phantom was set in front of wall detector of X-rays equipment. AEC mode was set at 80kVp and Fix mode was set at 80kVp, 25mAs, 32mAs, 40mAs, and 50mAs. Whole spine AP image were aquired by combining C, T-L and L-S spine images obtained through 3 exposures. When obtaining C, T-L and L-S spine images, were checked for Air kerma (mGy) value calculated by UNFORS Xi meter attached at the phantom surface of center of radiation field. The effective and organ doses were compared by PCXMC program (PC-Based Monte Carlo Program). The quality of obtained radiographic image was evaluated visually by 3 radiologists using resolution chart. When the effective doses was calculated based on tissue weighting factor of ICRP-103, 1.278mSv was measured by AEC mode, and Fix mode measured 0.405mSv at 25mAs, 0.518mSv at 32mAs, 0.649mSv at 40mAs, and 0.810mSv at 50mAS. In addition, the organ dose measured with esposure at 25mAs by Fix mode was almost equivalent to the organ dose by AEC mode, at the esophagus, thyroid, oral mucosa, salivaly glands located at the cervical spine part, while the organ dose by Fix mode was in general lower than the organ dose by AEC mode at the other organs. When Fix mode at 32mAs, 40mAs, and 50mAs was compared to AEC mode for organ dose in 26 organs, AEC mode had higher measurement in 21 organs but not for than brain, trachea, thyroid, oral mucosa, and salivaly glands which are located at the cervical spine part. The image quality evaluated by resolution test chart was much higher with AEC mode than the quality with Fix mode at all exposure conditions. However, while the image quality of cervical spine exposured at 50mAs by Fix mode was lower than the quality of AEC mode, thoraco-lumbar spine and lumbo-sacral spine were calculated and the quality was similar to AEC mode. Scoliosis occurs mainly at thoraco-lumbar and lumbo-sacral spine, not at cervical spine. Compared to AEC mode, Using the appropriate protocol (80kVp, 50mAs) of fix mode for whole spine AP radiography was thought to be useful because the image quality of the thoraco-lumar and lumbo-sacral spine was similar on AEC mode, Also organ and effective doses can be decreased with Fix mode. Therefore, It is considered that fix mode can be used properly with AEC mode for whole spine AP radiography when considering patient's body posture.

탄소배출저감형 에코혼화재의 활용방안

김정진,황인성,이상현,Kim, Jeong-Jin,Hwang, Yin-Seong,Lee, Sang-Hyun 한국건설순환자원학회 2011 한국건설순환자원학회지 Vol.6 No.1

The Fabrication of (Ga, Al) As/GaAs Modified Multi-Quantum Well Laser Diode by MOCVD

김정진,강명구,김용,엄경숙,민석기,오환술,Kim, Chung-Jin,Kang, Myung-Ku,Kim, Yong,Eom, Kyung-Sook,Min, Suk-Ki,Oh, Hwan-Sool The Institute of Electronics and Information Engin 1992 전자공학회논문지-A Vol.29 No.9

The Modified Multi-Quantum Well(MMQWAl) structures have been grown by Mental-Organic chemical Vapor Deposition(MOCVD) method and stripe type MMQW laser diodes have been investigated. In the case of GaAs/AlGaAs superlattice and quantum well growth by MOCVD, the periodicity, interface abruptess, Al compositional uniformity and layer thickness have been confirmed though the shallow angle lapping technique, double crystal x-ray diffractometry (DCXD) and photoluminescence (PL) measurement. stripe-type MMQW laser diodes have been fabricated using the process technology of photolithography, chemical etching, ohmic contact, back side removing and cleaving. As the result of the electrical and opticalmeasurement of these laser diodes, we have achieved the series resistance of $1[\Omega}~2{\Omega}$ by current-voltage measurements, the threshold current of 200-300mA by currnt-light measurements and the lasing wavelength of 8000-8400$\AA$ by lasing spectrum measurements.