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      • KCI등재

        불소처리된 치근상아질에 대한 심미수복재의 결합에 관한 연구

        탁흥수,박상진,민병순,최호영,최기운 大韓齒科保存學會 1998 Restorative Dentistry & Endodontics Vol.23 No.1

        The purpose of this study was to evaluate the effects of fluoride application on the aspect of shear bond strength of three aesthetic restorative materials to dentin. One light-cured composite resin(Palfique Esterite) and two light-cured glass ionomer cements(Fuji Ⅱ LC and Compoglass) were used in this study. 120 permanent molars were used for this study. The teeth were extracted due to the origin of periodontal disease. The crowns of all teeth were removed, and the remaining roots were embedded in epoxy resin. The mesial or distal surfaces of roots were ground flat to expose dentin and polished on wet 320-, 400-, and 600 grit SIC papers for a total of 120 prepared flat root dentin surfaces. The prepared samples were divided into six groups. Group 1, 3, and 5 were control groups and group 2, 4, and 6 were experimental groups. Sixty samples for experimental groups were treated with 2% NaF solution for 5 minutes. Group 1 and 2 were bonded with Plafique Esterite, group 3 and 4 were bonded with Fuji ll L(and group 5 and 6 were bonded with Compoglass. After 24 hours water storage at 37±1℃, all samples were subjected to a shear to fracture with Instron universal testing machine(No.4467) at 1.0㎜/min displacement rate. Dentin surfaces treated with each conditioners before bonding and interfacial layers between dentin and aesthetic restorative materials were observed under Scanning Electron Microscope(Hitachi S-2300) at 20Kvp. The data were evaluated statistically at the 95% confidence level with ANOVA test. The result were as follows; 1. Among the control groups, group 1 showed strongest bond strength and group 3 showed weakest. 2. Among the experimental groups, group 2 showed strongest bond strength and group 6 showed weakest. 3. Statistical analysis of the data showed that pretreatment of dentin with 2% NaF solution significantly decreased the bond strength of three aesthetic restorative materials to dentin(P<0.05). 4. SEM findings of fluoride treated dentin surfaces(2, 4, 6 group) demonstrated dentin surfaces covered with fluoridated reaction products. 5. Except group 4 and 6, resin tags were formed in all groups.

      • 經濟發展論의 比較考察

        成炳卓 대구교육대학교 1974 論文集 Vol.10 No.-

        In this paper, I have attempted to compare the theories of economic development on Classical, Maxian, Neo-classical, Schumpeterian, and Keynesians. theories of economic development have long been of interest, and the above economists have all contributed to the subject. Besides, I have summarizes the major differences and similarities among these theories. And both their contributions and limitations to the understanding of the economic development process are stressed.

      • 경제교육의 실태와 과제

        김병구,남병탁 경일대학교 산업정보연구소 2000 産經硏究 Vol.7 No.1

        경제교육의 목표는 경제적 사고력을 바탕으로 경제문제를 합리적으로 해결할 수 있는 능력을 배양하는 것이다. 본 연구는 현행 중·고등학교 경제교육이 이러한 경제교육의 목표를 달성함에 있어서 어떠한 문제점을 안고 있으며, 향후 과제는 무엇인지에 대해 연구하였다. 먼저 현행 경제교육의 문제점으로는 첫째, 이론 중심의 교과서 편성, 둘째, 가치규범의 방향 제시 미흡, 셋째 사실오류와 일관성의 결여를 들 수 있다. 경제교육의 목표를 보다 효과적으로 달성하기 위해서는 경제 및 교육환경의 변화를 교육내용에 포함시키며, 선정된 경제교육의 내용을 효과적으로 학습하는 방법은 무엇인지를 따져볼 필요가 있다. 본 논문에서는 향후 경제교육의 과제로 다음의 방안을 제시하였다. 첫째, 경제교육은 세계화, 정보화와 같은 환경 자체를 교육내용에 포함시켜야 한다. 둘째, 경제교육은 경제이론에 치중하기보다는 경제력 사고력 신장에 중점을 두어야 한다. 셋째, 정의적 측면에서 경제적 윤리관과 가치관을 확립하는 것이 중요하다. 넷째, 학습자 중심의 교육에 필요한 교수-학습방법의 개발과 교사의 고정된 지식관을 바꾸어야 한다. 이러한 방안들을 경제교육 현장에 적용함과 동시에, 경제교육과 관련된 주체가 경제교육의 목표달성에 많은 관심을 가질 때 경제적 사고의 신장과 합리적 의사결정능력의 함양이라는 경제교육의 목표는 보다 효과적으로 달성될 수 있을 것이다.

      • 소형가솔린 기관의 운전조건에 따른 작용하중의 변화와 응력분포 특성에 관한 연구

        김병탁 釜慶大學校 1997 釜慶大學校 論文集 Vol.2 No.2

        In this study, the amplitude and fluctuation of the mechanical forces which avt on a small 3-cylinder gasoline engine block were investigated in consideration of the measured gas pressure and the transmission path of the loads. And the variations of torques during one cycle were examined in various operating conditions and their mean values were calculated using the mechanical loads and compared with the mesured ones from the dynamometer. With the mechanical forces at the time when each cylinder is subject to macimum pressure, the finite element analysis was carried out in order to examine the stress and deformation characteristics of the block from a point of view concerning their effects on the engine operation.

      • KCI등재

        加味大補湯이 白鼠의 血壓에 미치는 影響

        金炳卓,金聖勳,金允植 대한동의병리학회 1997 동의생리병리학회지 Vol.11 No.1

        現代 成人病 중에서 가장 根本이 되는 基礎的 原因疾患으로서, 最近 食生活의 向上, 公害의 增加, 精神的 緊張의 增加로 인해 腦卒中, 動脈硬化, 糖尿病 등의 疾患과 더불어 增加趨勢에 있는 高血壓에 대하여 氣血大虛로 因한 中風의 左半身 或 右半身不遂 및 高血壓의 症狀에 有效한 治療效果가 있다고 思料되는 加味大補湯의 고혈압 억제 작용을 SD를 통하여 검토하였던 바 加味大補湯은 低濃度에서 血壓 降下作用이 있고 高濃度에서는 血壓에 影響을 주지 않으며, 血壓降下作用이 交感神經 α2 및 α受容體 遮斷制에 의해 遮斷되었으므로 交感神經遮斷劑로서의 役割을 하는 것으로 判斷되나 앞으로 用量의 變化에 따른 血壓에 미치는 影響과 血壓降下의 機轉에 대한 깊은 硏究가 必要하리라 思料된다. A study on the Effect of KAMITAEBOTANG(加味大補湯) on the Blood Pressure in SD Rats. The results were obtained as follows ; 1. In the result of Administration of KTBT for 11 days in SD Rats, the Blood Pressure was decreased in 150㎎/㎏, 300㎎/㎏ of solid extract of KTBT, unchanged or increased in 600㎎/㎏, 1200㎎/㎏ of solid extract of KTBT, KTBT had no effects on Pulse Rate at all treated group. 2. After injection of KTBT on caudal vein of SD Rats, the Blood Pressure was decreased in 150㎎/㎏, 300㎎/㎏ of solid extract of KTBT, unchanged or increased in 600㎎/㎏, 1200㎎/㎏ of solid extract of KTBT, and KTBT had no effects on Pulse Rate to all treated group. 3. The antihypertensive effect of KTBT was obliterated by pretreating with Clonidine 0.2㎎/㎏, Adrenergic α2 recepter Blocking Agent, and KTBT had no effect on Pulse Rate to all treated group. 4. The antihypertensive effect of KTBT was obliterated by pretreating with Pentolamine 1.0㎎/㎏, Adrenergic α recepter Blocking Agent, and KTBT had no effect on Pulse Rate to all treated group. 5. The antihypertensive effect of KTBT was not obliterated by pretreating with Propranolol 1.0㎎/㎏, Adrenergic β recepter Blocking Agent, and KTBT had no effect on Pulse Rate to all treated group. 6. The antihypertensive effect of KTBT was not obliterated by pretreating with Hydralazine 2.0㎎/㎏, Vasodilating Agent, and KTBT had no effect on Pulse Rate to all treated group. 7. The antihypertensive effect of KTBT was not obliterated by pretreating with Verapamil 1.5㎎/㎏, Ca++Blocking agent, and KTBT had no effect on Pulse Rate to all treated group. From the above result, blood pressure was decreased in the lower concentration of KTBT, unchanged or increased in the more concentration of KTBT. Because the antihypertensive effect of KTBT was obliterated by pertreateing with Adrenergic α2, αrecepter Blocking Agent, the antihypertensive mechanism of KTBT is supposed be Adrenergic α2, α recepter Blocking Agent. And further study on the effect on the Blood Pressure and the antihypertensive mechanism of KTBT on accordance with concentration should be ensured.

      • KCI등재

        最初記憶의 診斷別 比較

        朴炳卓,田民 大韓神經精神醫學會 1981 신경정신의학 Vol.20 No.1

        The earliest memory has been studied by many has been studied by many psychiatrists and psychologists in terms of under standing individual psychodynamism. To compare the earliest memories of two different diagnostic groups of schizophrenia and neurosis, the authors studied the reports of the memories of 245 schizophrenics and 213 neurotics who were either outpatients or inpatients of Daegu Dongsan Presbyterian Hospital, neuropsychiatric department from March, 1980 to August, 1980. In order to investigate the differences between both sexes, each group was divided into male and female subgroups. The results could be summarized as follows; 1. Events of the earliest memory took place most frequently in the oedipal period of 3 to 4 years of age. The memories of the preoedipal events were more frequent in the schizophrenic group compared to the neurotic group. 2. Affect associated with the memory was more frequently unpleasant in both groups, but pleasant affect was more frequently reported in the neurotic group as compared to the schizophrenic group. 3. The earliest memory of being alone was more frequent in the schizophrenic group, and among the neurotic group, it was more frequent in the male than the female group. The earliest memory of being with two to four persons was more frequent in the neurotic group. The persons in the memories were more frequently identified in the neurotic group. 4. The most frequent theme of the memories was dependency, occupying more than half in both groups. Aggression was also a frequent theme. There was no statistical difference between two groups. However, schizophrenics had more regressive themes in earlier ages, while neurotics had less regressive themes in later years. 5. Among the male neurotics, the denpendency theme was more frequent in the earlier ages, while in the female neurotics, it was more frequent in the later ages. Among the schizopqrenics, the aggression theme was more frequent in the male group.

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