RISS 학술연구정보서비스

검색
다국어 입력

http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.

변환된 중국어를 복사하여 사용하시면 됩니다.

예시)
  • 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
  • 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
닫기
    인기검색어 순위 펼치기

    RISS 인기검색어

      검색결과 좁혀 보기

      • 좁혀본 항목

      • 좁혀본 항목 보기순서

        • 원문유무
        • 음성지원유무
        • 원문제공처
        • 등재정보
        • 학술지명
        • 주제분류
        • 발행연도
        • 작성언어
        • 저자

      오늘 본 자료

      • 오늘 본 자료가 없습니다.
      더보기
      • 무료
      • 기관 내 무료
      • 유료
      • Resin Work Technique에 따른 Orthodontic Acrylic Resin의 파절강도에 관한 연구

        閔炳國 동남보건대학 2002 論文集-東南保健大學 Vol.20 No.1

        This study aims to maximize the function of base plate in dental orthodontic appliance by comparing fracture strength of base plates manufactured with spray-on technique and doughing technique. S₁-group(spray-on technique) and D₁-group(doughing technique) were manufactured in tap water at room temperature under the pressure of 1㎏/㎠. S₂-group and D₂-group were manufactured in 20℃ distilled water under the pressure of 2㎏/㎠. S₃-group and D₃-group were manufactured in 20℃ distilled water under the pressure of 4㎏/㎠. S₄-group and D₄-group were manufactured in 40℃ distilled water under the pressure of 2㎏/㎠. S_(5)-group and D_(5)-group were manufactured in 40℃distilled water under the pressure of 4㎏/㎠. In each group 5 sample plates of each group were prepared with the size of 25×2×2㎜. so total 50 sample plates were manufactured using self-curing resin. After sample plates were immersed in distilled water(37±1℃) for one day. the fracture strength of each was measured with 3 point flexural equipment of Instron. The results are as follows: 1. When sample plates were manufactured in tap water at room temperature under the pressure of 1㎏/㎠. the fracture strength was low regardless of the resin work technique. 2. When sample plates were manufactured in 20℃ distilled water under the pressure of 2㎏/㎠, sample plates manufactured with doughing technique(D₂) showed significantly higher fracture strength(p<.05) than those with spray-on technique(S₂). When sample plates were manufactured with spray-on technique in 20℃ distilled water, sample plates manufactured under the pressure of 4㎏/㎠(S₃) showed significantly higher fracture strength(p<.05) than those under the pressure of 2㎏/㎠(S₂). 3. When sample plates were manufactured in 40℃ distilled water, sample plates manufactured with doughing technique showed higher fracture strength than those with spray-on technique. But, there were no significant differences in fracture strength between the resin work technique or between the pressure. With these results. the fracture strength of sample plates will be higher when the temperature of distilled water and the pressure increased, and when sample plates were manufactured with doughing technique rather than with spray-on technique.

      • SCOPUSSCIEKCI등재

        실험적 뇌경색에서 Xanthine Oxidase 활성도 변화에 관한 연구

        민병국,박관,김영백,황성남,석종식,최덕영,박용석,이영배 대한신경외과학회 1992 Journal of Korean neurosurgical society Vol.21 No.7

        To observe the activity of the xanthine oxidase in cerebral ischemia, an ischemic model was made using a transorbital occlusion of the middle cerebral artery(MCA) in cats. Xanthine oxidase activity was measured by means of high performance liquid chromatography with electrochemical detection of uric acid. The results were as follows : 1) The infarction in the territory of the left middle cerebral artery(MCA) was identified with intracardiac perfusion of a 2% triphenyltetrazolium chloride(TTC) solution after transorbital occusion. 2) There was no significant difference between the control and ischemia groups in the total xanthine oxidase activity. 3) In the control group, 38.2% of the total xanthine oxidase was in the oxygen-dependent superoxide-producing oxidase group (Type 0). It had been increased with time in ischemia, despite the total xanthine oxidase activity remaining the same ; particularly at 12 hours (p<0.05) and 24 hours (p<0.01) after occlusion of the left MCA. 4) In the healthy side, the activity of type 0 and its ratio to the total xanthine oxidase activity has not been increased. 5) IN the ischemic side, the conversion of type D xanthine oxidase to the type 0 xanthine oxidase was demonstrated and its rate had been increased with the passage of time.

      • 강원지역 치과기공사의 보수교육 인식에 관한 조사연구

        閔炳國,郭秀眞 동남보건대학 2000 論文集-東南保健大學 Vol.18 No.1

        The study objected to the 64 persons out of 102 persons who had registered under the association of the dental technicians in Kang-Won to grasp contents about improvement of life long education of the present day of January 2000, and its results which we had acquired by this study were as follows ? l. A sense of satisfaction toward the system of life long education appeared as unsatisfaction and its unsatisfaction decreased from the contents of education, The rate of member's attendance, the problem of inviting of a lecturer. 2. The frequency of the opening for the life long education was fixed as nowadays two times per annually and they wanted to keep it. They liked the opening at the second week and preferred the holding on saturdays. 3. The subject of the life long education had appeared the opinion that thesis was lop-sided toward the allocation of time schedule of lecture appeared the opinion of which they preferred the rate of an hour of cultural subject and three hours of major studies, and invitation for an instructor they preferred two dentist, one member, one dean for the cultural subject and there were lots of opinions which they wished display of materials. 4. A sense of satisfaction about the place was good. They hoped taking place in a public auditorium or seminar room. 5. The problem of a Exam. mark, Which derived by a substitute presence and the relation which legal treatment when ones didn't completed Exam. 6. Lastly, there were lot's of opinions who had required the necessities to constitution for the academic branch.

      • KCI등재

        산화아연 나노막대가 내장된 아산화구리 박막 구조를 이용한 산화물 광양극 제작 및 광전기화학적 특성

        민병국,김효진 한국재료학회 2019 한국재료학회지 Vol.29 No.3

        We report on the fabrication and characterization of an oxide photoanode with a zinc oxide (ZnO) nanorod array embedded in cuprous oxide (Cu2O) thin film, namely a ZnO/Cu2O oxide p-n heterostructure photoanode, for enhanced efficiency of visible light driven photoelectrochemical (PEC) water splitting. A vertically oriented n-type ZnO nanorod array is first prepared on an indium-tin-oxide-coated glass substrate via a seed-mediated hydrothermal synthesis method and then a p-type Cu2O thin film is directly electrodeposited onto the vertically oriented ZnO nanorod array to form an oxide p-n heterostructure. The introduction of Cu2O layer produces a noticeable enhancement in the visible light absorption. From the observed PEC current density versus voltage (J-V) behavior under visible light illumination, the photoconversion efficiency of this ZnO/Cu2O p-n heterostructure photoanode is found to reach 0.39 %, which is seven times that of a pristine ZnO nanorod photoanode. In particular, a significant PEC performance is observed even at an applied bias of 0 V vs Hg/Hg2Cl2, which makes the device self-powered. The observed improvement in the PEC performance is attributed to some synergistic effect of the pn bilayer heterostructure on the formation of a built-in potential including the light absorption and separation processes of photoinduced charge carriers, which provides a new avenue for preparing efficient photoanodes for PEC water splitting.

      • SCOPUSSCIEKCI등재

        뇌파 등전위 분포도법의 임상적 응용 : Computed Mapping of EEG

        민병국,황성남,석종식,최덕영,임광세 대한신경외과학회 1987 Journal of Korean neurosurgical society Vol.16 No.1

        Topographic electroencephalographic study (CME) is a newly developed method using a microcomputer system that displays the scalp topograph as the square roots of the average power spectra over each EEG frequency band on a color television screen. CME were applied to thirty patients. Fifteen patients out of them with focal neurologic deficit were analysed about CT scan and conventional EEG. The results of the study were as follows: 1) Comparing the results of CME and conventional EEG reading, CME revealed to be slightly more sensitive in detecting asymmetrical depression of background activity than the conventional reading of the EEG. 2) Topograph EEG study was more accurate than conventional EEG in lateralization of the lesion. 3) CME is very useful in topographic and objective diagnosis of functional lesion, although the source of the data is the same as that from the conventional EEG.

      • SCOPUSSCIEKCI등재

        소아에서 시상하부에 발생한 모양세포성 신경교종 : 증례 보고 Case Report

        민병국,구영두,석종식,최덕영 대한신경외과학회 1980 Journal of Korean neurosurgical society Vol.9 No.2

        The Juvenile pilocytic astrocytoma has histologically the same features as the adult type one. Contrary to the adult type, the parallel arrangement of fibrils in long thin tapering cells of the tumor is peculiarly independent of the environment in which the tumor is growing and it gives rise to the main tumor mass that is usually well circumscribed. The overall incidence is relatively rare of all the brain tumor, it occurs in children mainly from three to five of age. Its predilection sites are the hypothalamus and the optic chiasm. We are reporting an experiance of a juvenile pilocytic astrocytoma in a three years old female patient, involving the hypothalamus, basal ganglia and deep white matter of the temporoparietal lobe of the left side.

      • SCOPUSSCIEKCI등재

        뇌 지주막 낭종 : 증례 보고 Case Report

        민병국,윤병만,석종식,최덕영,임광세 대한신경외과학회 1981 Journal of Korean neurosurgical society Vol.10 No.1

        Intracranial arachnoid cysts are uncommon congenital lesions of considerable interest and importance, the origins and exact nature of which remain uncertain. They account for about 1% of all intracranial space-occupying lesions). Its predilection sites are in the sylvian fissure, the interhemispheral fissure, the cerebral convexity, the base of the brain, and over the midline of the cerebellum in the posterior fossa. We are reporting a case of arachnoid cyst, developed in the left sylvian fissure in a ten years old male patient

      • 경인지역 치과기공사의 건강증진행위와 자기효능감과의 관계 연구

        閔炳國,李周熙 동남보건대학 2001 論文集-東南保健大學 Vol.19 No.1

        This study was designed to investigate the relationship of health promoting daily life style and self-efficiency about a dental technician. For maintaining health, it is important to keep one s healthful behavior. If human activity is decided by personal recognition, it might be crucial to research the relationship between health promotion behavior and the recognition factors on health promotion. A self-efficiency, among cognitive-perceptual factors, has been convinced of being the most efficient factor for a health promotion to take and maintain a certain activity. The purpose of this study is to inquire into the degree of health promotion activity of a dental technician, and to find out the relationship between the self-efficiency and the health promotion behavior in order to offer the basic data for developing a educational method or program of health promotion. The objects of this study were selected by haphazard sampling and the size was 203 of the dental technician. I collected the data 24 November 2000 to 8 January 2001 and the data was analyzed by means, percentage, ANOVA, pearson's correlation coefficient and stopwise multiple regression, using SPSS-PC+, and the results are as follows. 1. The hypothesis that 'The higher the self-efficacy, the better the health-promoting behaviors' was supported on a meaningful level(r=.623, p<.000). I analyzed the effect of self-efficacy on each section of the health-promoting behaviors and the result in every section supported the hypothesis on a meaningful level-the eating habit(r=.541. p<.000), drinking · smoking(r=.629, p<.000), health responsibility(r=.02, v<.000). the control of interpersonal relation(r=.415. p<.000). the exercise(r=.504, p<.000), the control of interpersonal relation(r=.313, p<.000), self-achievement(r=.542, p<.000). 2. The executive degree of health-promoting behaviors of the objects was above-middle, 2.59(total=4.00). When the means of the executive degree of each sections were examined, the section of self-achievement was the highest(2.98), and the others order was drinking smoking(2.81), the control of personal relation(2.80), the control of stress(2.68), the eating habit(2.82), the exercise(2.49), health-responsibility(2.07). 3. The point of self-efficacy was 6.63(total=10.00). In each sections, self-achievement was the highest(7.82). the control of interpersonal relation(7.33), drinking smoking (6.92) was the next, and the control of stress(6.90) was the next, the eating habit(6.26), the exercise(6.05), health-responsibility(5.98) was the lowest one.

      • 치과기공사의 이미지에 관한 연구

        민병국,최에스더 東南保健大學 2005 論文集-東南保健大學 Vol.23 No.2

        This study surveyed 350 persons who were over 18 and not related to dentistry with questionnaires in order to examine the image and preference of dental technicians.

      맨 위로 스크롤 이동