建築物을 土地情報시스템에 登錄하는 方法의 硏究

박운용,이동락,백기석 東亞大學校建設技術硏究所 2004 硏究論文集 Vol.28 No.1

In this study. we investigated 3 methods for precise registration of buildings into LIS. They are : 1. using digital topographic maps. 2. using registered building maps. 3. cadastral surveyings on sites. The first method was found that it hardly met required precision. and the second one was also lack of precision because of unmatched actual buildings with registered ones and many unregistered buildings. The last method produced the most precise results. although it required laborious cadastral surveyings on sites. Considering the importance of building registration as it shows the ownerships of properties. the third method was thought to be desirable.

로케트 工學에 관한 硏究 : 第1報 : 亞音速 亂流流動에서 飛行翼模型의 剝離現象 Ⅰst Report : Separation of Airfoils in Subsonic Turbulent Flow

朴煥奎,金鍾一,金鎭興,李茂錫,朴吉文,鄭洛奎,李行男,李東起 조선대학교 동력자원연구소 1984 動力資源硏究所誌 Vol.6 No.2

Separation, pressure and velocity distributions were studied fully developed two dimensinonal, incompressible flow over a flat airfoil in subsonic wind tunnel. Velocity and turbulence were measured with a two channel constant temperature hot wire anemometer and pressure with a pitot tube and pressure tranducer system. The experimental results were obtained as follow: (1) Turbulent intensity of shear layer just outside the separation point is considered to affect the size of separation bubble. (2) Static pressure coefficient is separated into three regions according to its value change. (3) Separation point is varied with the change of attack angle. (4) Velocity distributions and boundary layers normal to airfoil surface are changed as variation of attack angle of airfoil.

백서의 질식성 심정지모델에서 N-acetylcysteine의 뇌신경보호 효과

박승현,최창락,오동렬,최세민,김세경 대한응급의학회 2001 대한응급의학회지 Vol.12 No.4

Background: A major pathway leading toward neuronal injury following ischemia-reperfusion of the brain involves elevation of extracellular glutamate and activation of glutamate receptors, with a subsequent increase in intracellular calcium, resulting in a generation of free radicals. Oxygen free radicals cause brain injury following resuscitation from cardiac arrest. Oxyradicals produce strand breakage in DNA, which triggers energy-consuming DNA repair mechanisms and activates the nuclear enzyme poly(ADP-ribose) synthetase(PARS). However, excessive PARS activation leads to energy depletion and exacerbation of neuronal damage in cerebral ischemia. Methods: We investigated the effect of a potent, free-radical scavenger, N-acetylcysteine(NAC), on hippocampal neuronal death in an asphyxial cardiac arrest model of rats. The effect of NAC on hippocampal neuronal death was studied in 32 rats which were subjected to asphyxial cardiac arrest for 7 minutes, followed by resuscitation. The animals were divided into four group(8 rats in each group) as follows: Group I was saline treated for 3 days, Group II was NAC treated for 3 days, Group III was saline treated for 6 days, and Group IV was NAC treated for 6 days. In the NAC-treated groups, NAC(150㎎/kg) was intravenously injected after return of spontaneous circulation. The coronal sections with hippocampus levels were stained with hematoxylin-eosin(H-E) and PARS antibodies at 3 and 6 days after survival. In addition, the levels of myeloperoxidase(MPO) and malondialdehyde(MDA) were determined in the brains of each group. Results: The results are as follows: 1. MPO & MDA levels were significantly lower in the NAC-treated groups, II and IV, than in the saline-treated groups, I and III. 2. The histologic damage score(HDS), as determined by H-E staining, was significantly lower in the NAC-treated groups, II and IV, than in the saline-treated groups, I and III. 3. In PARS immunohistochemical staining, the HDS was significantly lower in the NAC-treated groups, II and IV, than in the saline-treated groups, I and III. Conclusion·. These results suggest that a free-radical scavenger, N-acetylcysteine, may effectively prevent neuronal damages after reperfusion from asphyxial cardiac arrest in rats. Further studies will be required to examine both the mechanism of the action and the clinical application of NAC in patients with cardiac arrest.

Linear Combination Analysis Using GPS Data

Park, Woon-Yong,Lee, Dong-Rak,Back, Ki-Suk,Hong, Jung-Soo 東亞大學校 建設技術硏究所 2005 硏究論文集 Vol.28 No.2

We can process and compute the position, velocity and time by satellite signals of GPS. The signals are used to compute positioning of three dimensions and timing offset of the receiver clock when we can track the tour satellite signals at least. One of the specified aims is to use less expensive single frequency code/carrier phase GPS receivers, which are typically around half the price of dual frequency receivers. In the study, the author analyzed the accuracy and applicability of frequence linear combination using triangulation points evaluated distance limitation.

위성신호 특성에 따른 항공삼각측량의 결합 번들블럭조정

박운용,이동락,신상철,김천영 동아대학교 건설기술연구소 1998 硏究報告 Vol.22 No.1

Recently, GPS-aided aerial triangulation becomes a standard technique for topographic mapping. The main reason for wide spreading of combined bundle adjustment with GPS is the cost savings through considerably reduction of ground control points without loss of accuracy in comparison with conventional method. Another advantage of GPS-Photogrammetry is the real time flight navigation which enables to conduct the preplanned overlap and exposure time exactly. The combined bundle block adjustment with projection center coordinates determined by kinematic DGPS-positioning has reached a high level of accuracy. Standard deviations of the ground coordinates of ±10cm or even better can be reached. On this accuracy level also smaller error components are becoming more important. One major point of this is the interpolation of the projection centers as a function of time between the GPS-antenna locations. As a result of introducing DGPS-data into the block adjustment instead of ground control points, with only the control points located at both ends of blocks, it was possible to get same levels of accuracy as that of conventional block adjustment that needs a few control points. In case that the geometry of block is good, with one control point or without control points it was possible to adjust, but at least four control points were necessary to correct the errors remained in the kinematic positions effectively.

GPS 관측에 의한 지오이드고에 관한 연구

박운용,홍순헌,이동락 동아대학교 공과대학 부설 한국자원개발연구소 1995 硏究報告 Vol.19 No.2

This reseach is about the decision of accurate altitude to use GPS(Global Positoning System : TOPCON GP-R1) satellite. I reckoned diversional outcome using 7-Parameter method, MRE(Multiple Regression Equations)method, and Standard-Molodensky method in this study. Also, to decide accurate Geoid Height, I decided the Geoid Height of each observation point using both WGS 84 (World Geodetic System 84) Geoid-Height and the OSU91A(Ohio State University 91 A) Geoid model. They were decided form GPS reception. To the examine of the results, it was used MSL(Mean Sea Level), which was decided through tidal obervation. The above research result show that 7 Parameter method was very excellent among the three method of coordinate transformation. I obtained the results :δ=±50cm in the horizontal position and δ=±30cm in the vertical position. Form this time, on the development of Geoid model to suit our country for the outcome of better result.

완전뇌허혈후 재관류시에 국소뇌혈류, 체성감각유발전위 및 신경학적 회복에 대한 Mannitol과 Thiopental의 효과

박춘근,이상원,박영섭,최승진,허필우,정동섭,강준기,최창락 대한신경외과학회 1996 Journal of Korean neurosurgical society Vol.25 No.2

The cardiopulmonary bypass or cerebral circulation arrest is often used in the treatment of complex aneurysm or of arteriovenous malformation to decrease the risk of intraoperative aneurysm rupture. Although experimental studies have suggested that some drugs may protect the brain from ischemic injury, there are limitations in maintaining cerebral perfusion arrest without incurring neurologic deficits due to the initiation of detrimental processes including excitotoxic neuronal injury, activation of phospholipases, influx of calcium, and generation of damaging free radicals. The purpose of this study is to determine wheter mannitol or thiopental has any favorable effects on the recovery of neurologic deficits and on the regional cerebral blood flow(rCBF), somatosensory evoked potential(SEP) and electroencephalogram(EEG) in cats which underwent 15 minutes-complete global ishcemia-reperfusion. The complete global ischemia was produced in 38 cats by temporary intrathoracic occlusion of the innominate artery and the subclavian artery following ligation of bilateral mammary arteries and simultaneous induction of hypotension. The cats were allocated randomly to one of 4 treatment groups : (1) control group, 8 cats received equal volume of saline solution : (2) thiopental group, 10 cats received 45㎎/㎏ thiopental intravenously, (3) mannitol group, 10 cats received 2g/㎏ mannitol intravenously, (4) combined mannitol and thiopental group, 10 cats received equal dose of mannitol and thiopental intravenously. The drugs were administrated in a equally divided dosage before and after the ischemic episode. The results were as follos : 1) Eight animals which received saline showed the severe postischemic hypoperfusion and poor recovery of SEP and EEG, and 6 of them died within 6 hours after the ischemia. 2) Ten thiopental-treated animals also showed the severe postischemic hypoperfusion and poor recovery of SEP and EEG, and 6 of them died within 6 hours the ischemia. 3) Both mannitol-and combined treated groups showed early recovery of EEG, good recovery of SEP and EEG without the severe postischemic hypoperfusion, and 7 of 10 mannitol-treated animals and 8 of 10 combined treated animals were significantly recovered in all parameters. There were not significant differences in all parameters between the mannitol-and combined treated groups. 4) Thirty-four of 38 animals involved in this 15 minutes-ischemia resulted in the severe neurologic deficits inspite of treatment with mannitol, thiopental or both of them. These results suggest that, in cats, mannitol treatment is effective but not thiopental in preventing severe neurologic injury following complete global ischemia and the duration of complete ischemia should be far less than 15 minutes.

계배 배양 근원 세포 항원에 대한 단일 클론 항체의 생산

박수정,강동수,김정락 인제대학교 1990 仁濟論叢 Vol.6 No.1

Monoclonal antibodies raised in mouse BALB/c against cultured chick myoblast were found to exhibit reactivity toward myoblast proteins of 109 kDa, 19 kDa, 18 kDa and 15 kDa and others. Especially the levels of 109 kDa, 18 kDa and 16 kDa proteins decreased during the course of myogenesis in culture and between embryo and adult muscle. These antibodies delayed the differentiation and enhanced the cell division of myoblast when added to culture media. Their effects were saturated by adding one fiftieth of media and accompanied with the increments of 200 kDa, 29 kDa and 15 kDa myoblast proteins, the decrement of 25 kDa protein, and the new synthesis of 57 kDa protein.

위성측지측량을 위한 GPS 신속 관측기법의 활용에 관한 연구

이동락,박운용,신상철 東亞大學校 大學院 1995 大學院論文集 Vol.20 No.-

The NAVSTAR GPS(NAVigation System with Time and Ranging Global Positioning System)is a satellite-based radio navigation system providing precise three-dimensional position, navigation, and time information to suitably equipped users. The system will be continuously avilable on a world-wide basis, and is independent of meteorological conditions. The Global Positioning System was primarily designed for military navigation system by the US Department of Defense(DoD) in 1973. It has been successfully used in civilian geodetic surveying since 1983. Thereafter, it has been proved that GPS is the most valuable and excellent method, that ever exist in positionong system. Previous application of GPS was mainly based on the time-consuming static measurement which is combined with the results of existing triangulation or trilaterlation. Presently, however, new rapid methods are developed by using the experience of static method. These satisfy the most advantage of GPS in aspect of rapidity, accuracy and economy. In the relative kinematic methods, one antenna is always fixed at reference station and the other one travels sequentially to measuring points. Although rapid measurement method takes a few seconds or minutes, it cope with the accuracy of static method. In this paper, the characteristics of new methods are presented. Also many experiences are discussed about the coastal GPS experiment where the Kinematic Differential GPS is needed to detect the morphologic changes.

Type Ⅳ 과지질혈증에서 나타난 다발성 건 황색종 : 1례 보고 One Case Report

천동욱,김홍태,박봉훈,변영수,홍순만,손경락,문세광 최신의학사 1992 最新醫學 Vol.35 No.10