• 혜화의학회지
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• 제14권1호
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• pp.59-65
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• 2005

One case of patient with adult polycystic kidney disease was reported in this clinical study. After the study, the results were as follows: The adult polycystic kidney disease(APCK) is inheritant disease in which cysts are distributed throught the cortex and medulla of both kidneys. It belongs to Hematuria in oriental medicine field. For this patient, it was effective to appliment acupuncture Hap-kok, Kok-chi, Oe-gwan, Chok-samni, Chok-imup, Sam-umgyo, Su-bun, Tae-chung and Hae-gye showed a great effect on decreasing the pain and increasing the volume of urine. For this patient, it was effective to dispense Gamiwuiryungtang(加味胃苓湯), Ohryungsan(五苓散) and Chungsimyeonjaeum(淸心蓮子飮), Dosubokryungtang(導水茯苓湯).

• 한국군사과학기술학회지
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• 제8권1호
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• pp.14-24
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• 2005

A propellant mainly consisting of nitric ester including nitrocellulose, nitroglycerine and nitroguanidine is characteristic of being decomposed naturally. And this phenomenon is known as being affected mostly by its storing temperature. In this research, the effect of storing temperature on self life has been studied by measuring the contained quantity of residual stabilizer of propellant KM30A1, ignition powder and combustible cartridge case, which are parts of 155MM propelling charge K676 and K677; the method for the measurement is acceleration aging test, and decomposition reaction equation and Berthlot Equation were used for the calculation. The result of this research shows that propellant KM30A1, ignition powder, combustible cartridge case in order of decreasing self life, and the self life decreases to 1/3 as the temperature increases by $10^{\circ}C$.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2005년도 추계학술대회 논문집
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• pp.1089-1096
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• 2005

This study was experimental test of edgewise compression properties for aluminum(type-50XX) sandwich panel with thermal environment and surface treatment using adhesive film. There was decreasing $10\%-peel$ strength after thermal environment. Through compressive. buckling mode know to seen of properties of adhesive, sheet and core strength. First case of Chromate to aluminum sheet, know low shear strength of adhesive through buckling mode but case of Beomite to aluminum sheet, know than thin sheet and core low strength through buckling mode.

• 대한기계학회논문집B
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• 제30권5호
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• pp.480-488
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• 2006

Numerical simulations of flow over two spheres placed in a tandem arrangement are conducted to investigate the effect of the inter-sphere spacing on the flow characteristics. The Reynolds numbers considered are 100, 250, 300 and 425, corresponding to steady axisymmetric, steady planar-symmetric, unsteady planar-symmetric, and unsteady asymmetric flows, respectively, in the case of a single sphere. For small inter-sphere spacings, the flow past two spheres is more stable than that past a single sphere. For example, with the spacing of the sphere radius, the flow is steady axisymmetric up to Re=300. However, for relatively large spacings, the flow past two spheres becomes unstable and vortex shedding takes place even at Re=250. The drag coefficient of the rear sphere decreases significantly with decreasing inter-sphere spacing due to reduction of the stagnation pressure, thus being smaller than that of the front sphere. Also, the rear sphere shows large fluctuations of the lift force as compared to the front one in the case of unsteady flow.

• 대한설비공학회지:설비저널
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• 제14권1호
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• pp.1-11
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• 1985

Solar/absorption cooling system was analyzed and its operating condition was examined. For the system, the optimum size of absorption refrigerator and collector area should be determined. As the temperature of water supplied to the generator increases, the collector efficiency decreases whereas the coefficient of performance of absorption refrigerator increases up to a certain point, and vice versa for decreasing of the temperature of water supplied to the generator . Thus if the reeling load is given, the appropriate operating condition can be determined between the two opposing trends by simulation program. As an example of the simulation, the case of Jejudo province was studied. Under the conditions (such as weather data and prices of components, etc.) given en the sample calculation, the result shows that the optimum temperature of water supplied to the generator turned out to be $80.3^{\circ}C$, and still shows a large economical disadvantage in present stage compared to the case of conventional vapor compression cooling/heating combined heat pump system.

• 척추신경추나의학회지
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• 제2권2호
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• pp.49-56
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• 2007

Objectives : This study is to investigate the clinical application of conservative treatment to a patient who has the paresthesia and migration on L-spine MRI. Methods : A male patient, 34 years old, who has paresthesia and migration on L-spine MRI was evaluated after conservative oriental medical and chuna treatment by Visual Analog Scale(VAS), Numeric Rating Scale(NRS), Straight Leg Rasing Test(SLRT), Sensation, MRI follow-up. Results : 1. Visual Analog Scale(VAS), Numeric Rating Scale(NRS), Straight Leg Rasing Test(SLRT), Sense was significantly improved after conservative oriental medical and chuna treatment. 2. Also it was observed that herniated disc was decreased by L-spine MRI follow-up. Conclusions : Conservative oriental medical and chuna treatment can be effective for decreasing pain and improving paresthesia, also decreasing the volume of herniated disc.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2001년도 추계학술대회 논문집 전기물성,응용부문
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• pp.219-223
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• 2001

In this paper, electromagnetic waves were measured in accordance with propagating the discharge when positive and negative DC high voltage was applied to needle-plane electrdes and plane-plane electrdes that solid dielectric was inserted between the electrodes. The radiated electromagnetic waves were investigated in bandwidth of VHF($30{\sim}230$[MHz]) using an biconical antenna. In needle-plane electrodes high electric field intensity is shown in both frequency band of 90(MHz) and 170[MHz], and gradually decreasing characteric is appeared at high frequency band. However high electric field intensity is shown in both 80[MHz] and 140[MHz] in case of plane-plane electrodes configuration. And over 150[MHz] frequency band, rapidly decreasing characteristic is shown. Moreover, electric field intensity of positive DC is about $5{\sim}10$[dB] higher than negative DC.

• 한국추진공학회:학술대회논문집
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• 한국추진공학회 2005년도 제24회 춘계학술대회논문집
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• pp.23-26
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• 2005

LOx와 Kerosene을 연료로 사용하는 LRE(Liquid Rocket Engine) Block에서 지상연소시험을 수행할 경우에 발생하는 위험도를 감소시키는 방법을 연구하였다. 추진제누출로 이어지는 위험한 상황에 대한 원인분석도와 추진제 유출시 사고로 이어지는 발전 양상 및 발전 프로세스, 사고시 손실을 줄이기 위한 기술적인 해결방법을 제시함으로써 기존의 확률적인 통계 값을 바탕으로 하는 것과는 또 다른 방법으로써 위험을 감소하기 위한 대안으로 사용하고자 한다.

• 대한한방내과학회지
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• 제21권3호
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• pp.477-486
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• 2000

Objective : This is the experimental paper to investigate the effects of Gami-oryungsan(GO) on decreasing the activities of free radicals. Methods : We used three different group; In the normal group, we injected Gami-oryungsan extract intraperitoneally daily for 15days(90mg/kg), bromobenzene(310mg/kg) for 2days and injected normal saline in the control group. Results : We have observed the effects of Gami-oryungsan about the damage of rat's liver induced by bromobenzene. We can find the level of lipid peroxidation and type conversion ratio of xanthine oxidase decreased compared to the case of bromobenzene-treated group. The enzyme of activities of superoxide dismutase, catalase and glutathione peroxidase highly increased in Gami-oryungsan pre-acupunctured group compared to the group treated with only bromobenzene. The level of glutathione in Gami-oryungsan pre-acupunctured group was increased as highly as normal group. Also it was not seen special effects concerning aldehyde oxidase. Conclusions : Gami-oryungsan extract recovers the damage of liver due to bromobenzene intoxication by decreasing the lipid peroxidation.

• 대한기계학회논문집
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• 제17권10호
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• pp.2467-2474
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• 1993

This paper deals with the cantilever subjected to a follower force which is generated by real rocket motor which has linearly decreasing thrust. The cantilever is assumed to be uniform and elastic one, In the theoretical analysis, the tip mass of rocket motor is considered as a rigid body and effects of its dynamic parameters are shown and compared with the experimental results. Particularly, the variation of the 2nd natural frequency due to the decreasing thrust is measured in the experiments and compared with the theoretical estimations. Approximate method is adopted in the theoretical analysis using Galerkin method by introducing 3-element modified operator and modified variable which represent eqation of motion and natural boundary conditions. In general, structural damping effects can be neglected and all the rigid body parameters must be taken into account in case of the short action time of the follower force and the relatively big tip mass like the system of this paper according to the experiment. Good agreement was obtained between the theoretical estimations and the experimental results by neglecting structural damping and considering all the rigid bidy parameters of the tip mass.