應急患者를 위한 頭部單純提 및 腦血管 撮影裝置의 試作

承健男 대구보건대학 1978 대구보건대학 論文集 Vol.4 No.-

with the progress of transport facilities or that pf industry, the number of trafic accidents or factory accidents has increased. Today, no less than several cases of head-trauma are btought to hospital a day. In the radiographing such cases, it is necessary to put a patient on the must suitable position as soon as possible, giving no pain to the patient. Therefoe, the autphy of the patient on a Therefore, the authorsmade for trial a simple X-ray apparatus in order to take x-ray photography of the patient on a stretcher. This apparatus was found to be able to be used for anterior roentgenography, Towne's radiography and encephaloarteriography.

복부 X선 촬영에 있어서 피폭 선량경감에 관한 연구

承健男 대구보건대학 1984 대구보건대학 論文集 Vol.8 No.-

복부 X-선 촬영시에 환자에 대한 피폭선량을 경감시키기 위하여 감도별 증감지와 관전압을 이용하여 실험하였으며 그 결과 다음과 같은 결론을 얻었다. 1. 증감지의 감도는 관전압이 증가됨에 따라 증가되었으며 증감지별로서는 special speed증감지가 우수하였고 special speed 증감지를 사용함으로서 medium speed 증감지 비해서 7.8배로 감도를 증가시킬 수 있었다. 2. 선예도는 관전압의 상승과 증감지의 감도에 반비례하였다. medium speed 증감지를 사용했을 때 감도와 선예도를 각각 100으로 기준을 잡으면 관전압 100 kv에서 special speed 증감지는 257로 증가되는데 비해서 선예도는 67.2로 나타났다. 3. 피폭선량을 표면선량으로 비교할 때에 비해서 100 kv에서 special speed증감지에서는 많은 피폭선량 감소를 보였다. 표면선량이 가장 적은 것은 관전압 100 kv에서 special speed 증감지를 사용할 경우로서 64 mR이고 다음은 역시 special speed증감지를 사용하여 120 kv에서 74 mR으로 나타났으며 medium speed 증감지와 80 kv에서는 663 mR로서 많은 피폭선량을 보여주고 있다. 그러므로 복부 X-선 촬영에서 가급적 고감도의 증감지를 사용하고 관전압은 100 kv이상으로 한다면 환자의 피폭선량을 경감시킬 수 있다는 실험결과를 얻었다. An experimental study for the reduction of exposure dose rate in abdominal vital organ roentgenography in plain film exposure with different screen was implemented and results were as follows : 1. With increasing volts in electricity the sensitivity of intensifying screen was increased accordingly therefore special high speed intensifying screen was the best quality for the reduction of dose rate in comparison of 80 kvp medium speed to 120kvp high speed which is more increased sensitivity in 7.8 times. 2. Sharpness was inversely proportional to the increased volts and sensitivity response to the intensifying screens. As of comparison in 100 of medium speed screens high speed screens become 69.2. 3. Exposed skin doses were resulted in 1/10 of reduction in skin dose in special speed high intensifying screens 100 kvp or more compare to the 8okvp medium speed one. From these results reducing skin dose rate in abdominal exposure of plain Roentgenogram should be utilized more in 100 kvp or more of high voltage and super sensitive hi& speed screens of intensification of exposure dose in abdomen.

파이온 비임 요법의 물리에 관한 연구

金承坤,姜正求,李延玉 全北大學校 1994 論文集 Vol.38 No.-

Monte Carlo calculations were performed for the transport of the photon, electron, and pion in the water phantom in an effort to quantify the effects of the three ionizing radiations for cancer therapy. Comparison of energy deposited by the three particles as a function of penetration shows that in the case of the negative pion, the normal Bragg peak is greatly enhanced by the energy deposited due to nuclear capture of the pion by a nucleus and the subsequent nuclear reaction. The results clearly indicate that a preferred method of radiation therapy is to use energetic negative pions which has a number of advantages over the other two particles.

서울에서 分離된 腸內細菌의 抗生劑耐性과 耐性傳達因子에 관한 硏究

劉承兆,金勝喜,염곤 成均館大學校 1980 論文集 Vol.28 No.-

Studies on drug resistance and R-factor of enteric bacterial flora isolated from Seoul area(June 1978∼Sept. 1978). Drug Resistance and the distribution of R-factor were examined using Escherichia coli, Salmonella, Shigella, Enterobacter and Klebsiella isolated from patients in Seoul area from June 1978 through Sept. 1978. 1. Of Escherichia coli, 147 strains (87.50%) were resistant to Ampicillin, but 2 stranins (1.19%) only were resistant to Nalidixic acid. Of Shigella, no strains were resistant to Gentamicin, and the persectage of resistancd to Streptomycin was highest (26.53%). Of Salmonella, no strains were resistant to Nalidixic acid, Tetracyclin, Gentamicin, Chloramphenicol, but the percentage of resistance to Streptomycin was high (95.04%). Of Enterobacter, 100% were tesistant to Amplicillin and Tetracyclin and of Klebsiella, 100% were resistant to Ampicillin. 2. Of Escherichia coli, most of strains were multiply resistant, while only 2 strains were singly resistant. Of Salmonella, 88.14% of resistant strains were singly resistant and of Enterobacter, all of 29 resistant strains were multiply resistant. 3. Escherichia coli, transferred R-factor in 81.76%, Shigella 25.00%, Klebsiella 93.48%, Enterobacter 86.96%, while Salmonella didn't transfer R-factor at all. 4. 23 resistant patterns of R-factor were found ifn Escherichia coli, 4 resistant patterns in Shigella, 7 resistant patterns in Klebsiella, and 3 resistant patterns in Enterobacter, especially, a resistant pattern of R-factor (AP)^r was 54.62% in Escherichia coli, 57.1% in Shigella, and 35.00% in Enterobacter, which was the highest one of resistent patterns of R-factor, while (AP, TC)^r was 48.84% in Klebsiella. 5. According to the result of examination, the multiply resistant strains transferred R- factor more easily than the singly resistant strains.

16세기 조사 연구

金昇坤 건국대학교 1974 學術誌 Vol.18 No.1

1.The Kinds of the articles of 16 century's Korean were case articles connectine articles interrogative articles and assistance articles. 2.There were nominative, possessive objective, comparative, positional, relative, instrumental, original and calling articles in the care articles. 3.There were i, ε in the nominative articles. 4.objective articles il. ril. were used for directive and indireative article. 5.new compartive articles, magot' ath appeared. 6.new relative articlesl g'i, handi which had not appeared in 15 century appeared. 7.new instrumental article, uro which had not appeared in 15 century appeared. 8.「j□」 was newly appeared in 16 century, 9.「va□」 was newly appeared as the connective article in 16 century. 10.「utu□. daga. s□n□. (a) mandj□, mana」 were newly appeared as the assistances articles in 16 century.

π-X선 강도계산

김승곤,김창영 全北大學校 敎育大學院 1986 敎育論叢 Vol.6 No.-

In the absence of comprehensive theory to explain the fluctuations of a given observed pionic X-ray yield as a function of the atomic number of the host atom, a simple parameterization of the negative pion distribution among various angular momentum states in its initial bound level was introduced in a standard pion cascade code. From the behavior of this initial distribution parameter which reasonably fits the observed fluctuations some information about the pion capture in the initial atomic orbit was deduced.

실험적 뇌지주막하 출혈에서 칼슘길항제 Nimodipine이 대뇌피질 혈류에 미치는 영향

허승곤,이규창 대한신경외과학회 1987 Journal of Korean neurosurgical society Vol.16 No.4

The effect of the calcium antagonist nimodipine on the feline cerebral cortical blood flow in experimentally induced subarachnoid hemorrhage(SAH) was studied. Cerebral cortical blood flow was measured in the middle cerebral arterial territory at specified intervals by the hydrogen clearance method. SAH was induced 25 cats by a slow injection of fresh autogenous arterial blood into the cisterna magna. Twenty-five cats were divided into 5 groups of 5 cats each according to the timing of the cerebral cortical blood flow measurements after SAH ; immediate(Group la, lb), 24 hours(Group 2), 48 hours(Group 3) and 7 days (Group 4). Cerebral cortical blood flow decreased by 55.5%, 39.2%, 41.4% and 38.3% from pre-SAH levels in each group respectively. During nimodipine infusion(1㎍/㎏/min) cerebral cortical flow increased by 89.0%, 51.8%, 87.5% and 24.5% from pre-nimodipine infusion levels in each group respectively. Mean arterial blood pressure(MABP) after cisternal blood injection increased by 6.5% from pre-SAH levels, and MABP during nimodipine infusion decreased by 15.4% from pre-Nimodipine infusion levels. The calcium antagonist nimodipine increased cerebral cortical blood flow significantly in experimentally induced SAH without considerable change of MABP. Results are considered promising for trials in the treatment and prevention of cerebral ischemia caused by vasospasm following SAH.

액체 ^⁴He에서의 μ^- 및 π^- X-선 강도 계산

김승곤 全北大學校 敎育大學院 1984 敎育論叢 Vol.4 No.-

Cascade calculations have been performed in an effort to better fit measured absolute yields of muonic and pionic X-rays in liquid ^4He. With the bell-shaped intial distribution calculated by Haff and Tombrello a slight improvement over the last calculation was made in agreement with the measured mesic X-ray yields.

Attrition Reactor에서의 힘의 소모량 측정에 관한 연구

劉承坤 충남대학교 공업교육연구소 1982 論文集 Vol.5 No.1

The milling effect of Attrition reactor was very successful using stainless steel balls as a milling media. But Attrition reactor need large amount of power consumption to agitat the heavy milling media. Power measurements were studied with a dynamometer which was attached to the torque table. Power consumptions were measured by changing agitation speeds, kinds of milling media, heights of milling media, positions of stirrer, stirrer types, and so on.

감마선 및 엑스선의 피이크 분석

김승곤,허영회,박광준 대한방사선방어학회 1984 방사선방어학회지 Vol.9 No.1

核分裂 및 放射化生成物質에서 放出하는 여러가지 감마선들은 核燃料를 破壞하지 않고도 推出할 수 있는 많은 情報를 包含한다. 그러나 半導體 檢出器에서 얻은 복잡한 스펙트럼에서 이러한 정보를 推出하기가 容易하지 않기 때문에 電算코드의 使用이 必要하게 된다. 本 硏究에서는 그동안 國際的으로 널리 普及되어 使用되는 감마선 分析 프로그램들의 長點을 취하여, 감마선은 물론 X-線의 스펙트럼도 피팅(fitting)하여 피이크의 중심과 면적을 正確히 計算할 수 있는 전산코드 CAERI를 開發하였다. CAERI는 FORTRAN으로 쓰여있고, 특히 固有輻射線幅(natural line width)을 무시할 수 없는 X-線의 피이크 表現函數인 Voigt 函數에 대해서는 다른 X-線 分析 프로그램들이 使用한 간단한 近似式 대신에, 더욱 正確한 無限級數近似式을 사용하였다. 특히 CAERI는 U이나 Pu과 같은 重元素의 核種分析時에 直面하는 감마선과 U이나 Pu의 X-線이 任意로 ()()하여 共存하는 복잡한 스펙트럼까지도 取扱할 수 있다. ()Lu감마선과 ()U K()X-線의 試驗스펙트럼을 피팅하여 다른 프로그램들의 피팅결과와 비교했을 때 좋은 一致를 보았다. A great variety of nuclear gamma rays emitted from fission and activation products of spent nuclear fuel contains much information that can be clicited without affecting the integrity of the fuel elements. But the extraction of such information form the comples spectrum is difficult and requires computer codes. In the present work, a versatile code "CAERI" was developed which located peaks and calculates their areas for X-rays as well as gamma rays using elegant features of some widely used program for gamma-ray peak fitting. "CAERI"coded in FORTRAN used infinite series approximation more accurate than other workers various simple, piecewise series approsimations for evaluations of the Viogt function which represents the X-ray peak with non-negligible natural line width. "CAERI" can handle even a complex multiplet consisting of peaks from X-rays and gamma rays in arbitray mixture, which one often encounters in the isotopic analysis of heavy elements such as U and Pu. The results of the fitting performed on the test spectra of ()Lu ()-ray and ()U K() X-ray show good agreement with those by previous workers.