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      • Headed Reinforcement를 사용한 철근콘크리트 깊은 보의 전단거동

        강경훈,이우진,김수봉,서수연,윤승조,김성수 대한건축학회 2003 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.23 No.1(구조계)

        Generally, headed reinforcement offers several advantages over straight bar or hooked bar anchorages to develop reinforcement in concrete members. The purpose of this study is to investigate the shear behaviors of reinforced concrete deep beam with headed reinforcement. Five deep beam specimens are designed to study the anchorage capacity of headed reinforcement as well as the contribution of H-bar and V-bar to the shear. Two anchorage types, standard 90-degree anchorage and headed reinforcement, are considered in design. From the tests, it is shown that In the test results, headed reinforcement is able to replace standard 90-degree anchorage as the anchorage method. The evaluation on the contribution of H-bar and V-bar in current design code for deep beam shows that the former is overestimated 75% and the latter is overestimated 17%.

      • KCI등재

        심폐소생술중 심실기능 및 판막운동의 평가

        이부수,김영식,이강현,황성오,임경수,박금수,윤정한,안무업,최경훈 대한응급의학회 1994 대한응급의학회지 Vol.5 No.2

        Background : Mechanism of blood flow during cardiopulmonary resuscitation(CPR) in humans remains controversial and poorly understood, although cardiac or thoracic pump theory was proposed. We investigated cardiac movement, ventricular function and atrioventricular valve motion with aid of transesophageal echocardiography during precordial compression during CPR in humans. Methods and results : During CPR transesophageal echocardiography was performed in 14 patients with non-traumatic cardiac arrest. Manual precordial compression during CPR was performed according to American Heart Association guidelines. Mitral valve closed in 9 and did not close in 5 patients during "compression systole". Tricuspid valve closed during compression systole. Compression vector directed to right ventricle, basal portion of interventricular septum and left atrium. The heart rotated clockwise and the apex was more displaced than the base("swing motion"). Fractional shortening(FS) and ejection fraction(EF) of right ventricle exceeded those of left ventricle(FS : 55±9% vs 18±8%, p<0.05), EF : 79±9% vs 37±16%, p<0.05). FS and EF of left ventricle was higher in patients with systolic mitral valve closure than patients with persistent systolic opening of mitral valve(FS : 21±7 vs 13±7%, EF : 45±12 vs 22±12%, p<0.05), but FS and EF of right ventricle was not different. Conclusion : During precordial compression, the heart rotated clockwise and displaced. Systolic function of right ventricle exceeded left ventricle. Marked compression of right ventricle and systolic closure of tricuspid valve suggested that right ventricle functioned as a pump generating blood flow during precordial compression. Closure of mitral valve was dependant on systolic function of the left ventricle.

      • 달맞이꽃 뿌리의 성분에 관한 연구

        최윤수,석경순,이경선,전숙경 대구효성가톨릭대학교 1992 연구논문집 Vol.45 No.1

        Oenothera odorata Jacquin(Onagraceae), native to south America, is naturalized and grows wild in Korea. The seed oil, named evening primerose oil, of this plants is used for prophylacsis of adult disease. From the roots of this plant, β-sitosterol, β-sitosterol-3-O-D-glucopyranoside and asiatic acid were isolated. The structures were elucidated by spectrometric methods and chemical transformation.

      • KCI등재

        혼수상태의 외상환자에서 초음파를 이용한 흉부 및 복부손상의 진단

        임경수,이강현,이진웅,이부수,황성오,유수영,강성준 대한응급의학회 1995 대한응급의학회지 Vol.6 No.1

        The need for rapid diagnosis and treatment of life-threatening thoracic and intra-abdominal injury result in controversy over the appropriate triage of unconscious blunt trauma patients. To aid in early decisions for these patients, a prospective analysis of 98 patients with glasgow coma scale(GCS) scores≤8 was undertaken. Although intra-thoracic and intra-abdominal injuries were frequently identified based on systolic blood ressure, the use of clinical signs alone resulted in more missed injuries than did using the emergency ultrasonography. In normotensive patients(n=34), intra-thoracic injuries was identified in one patient(2.9%), and intra-abdominal injuries were in 7 patients(20.6%). In shock(systolic blood pressure<90mmHg) Pa-tients(n=64), thoracic injuries and intra-abdominal injuries were diagnosed in 8(12.5%) and 27 patients(42.3%), thoracic and abdominal combined injuries were identified in 11 patients(17.2%). The sensitivity, specificity, and accuracy of emergency ultrasonography were 96.3%, 91.7%, 94.9%. This study suggests that all unconscious trauma patients undergo immediate emergency ultrasonography to prevent missing life-threatening injuries.

      • SCIESCOPUSKCI등재
      • 웹을 이용한 건축설계 협업시스템 구축을 위한 정보 플로우에 관한 연구

        오경진,오건수 남서울대학교 2005 남서울대학교 논문집 Vol.11 No.1

        The main problem of the architectural design process using web is a lack of proper collaboration system. The lack of proper collaboration system can occur the serious problems because of difficulty of sharing the opinions of participants and exchanging information each other. Therefore, to progress the architectural design in effective way, standardized and objective collaboration process is necessary. We develope the efficient communication to support the process. The main purpose of this study is to analyze the existing architectural design process, list the information according to the steps, and develope the collaborative system which can be saved as database and help the decision making.

      • KCI등재
      • KCI등재

        소아환자의 진정요법 효과와 그와 연관된 변수에 대한 연구

        김경희,김종수,김승오 대한소아치과학회 2007 大韓小兒齒科學會誌 Vol.34 No.2

        소아치과에서 진정요법은 chloral hydrate와 hydroxyzine을 함께 경구투여하는 방법이 가장 보편적이고, 진정의 심도가 술자가 원하는 정도에 미치지 못할 때에는 midazolam이나 N_(2)O/O_(2)를 병용투여하는 경우가 종종 있다. 본 연구는 chloral hydrate와 hydroxyzine을 이용한 진정요법의 효과와 안전성을 평가하고, 경구투여만으로 적절한 진정 수준을 얻지 못하여 N_(2)O/O_(2)를 병용투여한 경우, N_(2)O/O_(2)의 치료시간과 부작용에 대한 영향 그리고, 진정요법 효과에 영향을 줄 수 있는 변수들(연령, 성별, 체중, patient compliance, waiting time 등)을 확인할 목적으로 시행하였다. 2004년 12월부터 2005년 9월까지 단국대학교 치과병원 소아치과에서 chloral hydrate와 hydroxyzine을 이용하여 진정요법하에 치료받은 평균연령 30±8개월(12-51개월), 체중 13±2kg(9.5-18kg)의 총 94명(남아-46명, 여아-48명)의 환아들을 대상으로 조사하였다. 진정요법의 효과, 체중, 연령, 병용투여 방법에 따라 군을 분류하여 성별, 연령, 체중, patient compliance, waiting time, 치료시간, 치료양(RBVU), 부작용 등을 평가하였다. 진정요법 성공률은 85%였다. 진정요법에 성공한 그룹이 실패한 그룹보다 N_(2)O/O_(2)로 수면을 유도하여 사용하는 경우가 많았고, 치료시간이 길었다. 36개월, 14kg미만인 환아는 경구투여만으로 수면에 이를 수 있었고, waiting time이 짧았다. 36개월 이상인 환아는 N_(2)O/O_(2)를 사용하여 수면을 유도하는 경우가 많았다. 연령과 N_(2)O/O_(2)사용시간, N_(2)O/O_(2)사용과 치료시간사이에는 상관관계가 존재한 반면, 체중과 N_(2)O/O_(2)사용시간사이에는 상관관계가 없었다. 치료시간 연장, N_(2)O/O_(2) 사용여부와 부작용 발생간에서는 통계학적으로 유의한 차이는 확인되지 않았다. The combination of chloral hydrate and hydroxyzine is one of the safest and most commonly used drug regimens for sedating young, uncooperative pediatric dental patients. Midazolam IM or IN and N_(2)O/O_(2) inhalation is sometimes administered with chloral hydrate and hydroxyzinecombination when deeper and longer sedation is needed. The purpose of this study was to assess the outcome and safety of chloral hydrate, hydroxyzine and N_(2)O/O_(2) in the sedation of a large number of uncooperative pediatric dental patients and to identify variables associated with their effectiveness. In a nine-month retrospective study, 171 records of sedation performed in 94 healthy children(male 46, female 48) with mean age of 30±8 months were reviewed. The authors analyzed several variables such as age, sex, weight, methods of drug delivery, waiting time after drug delivery, treatment rendered, treatment time, adverse events, sedation outcome. Eighty five percent of sedation had success behavioral outcome. Sedation sessions rated success used more N_(2)O/O_(2) administration and had longer treatment duration than sedation sessions rated failure. A children patient under 36 months of age had enough sleep by on1y oral administration and the mean waiting time of this case was significantly shorter than that of a children patient over 36 months of age. There was a clear correlation between age and N_(2)O/O_(2) using time, but no correlation between weight and N_(2)O/O_(2) using time. There was no statistically significant difference among variables of treatment duration, N_(2)O/O_(2) administration and adverse event.

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