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      • KCI등재

        텔레스코픽 크라운 임플란트 지지 피개의치와 치아 지지 피개의치의 하악골내 응력분포에 관한 유한요소분석

        이창규,백장현,김태훈,김민정,김형섭,권긍록,우이형 대한치과보철학회 2012 대한치과보철학회지 Vol.50 No.1

        PURPOSE. The purpose of this study was to investigate the stress distribution in mandibular implant-supported overdentures and tooth-supported overdentures with telescopic crowns. MATERIALS AND METHODS. The assumption of this study was that there were 2, 3, 4 natural teeth and implants which are located in the second premolar and canine regions in various distributed conditions. The mandible, teeth (or implants and abutments), and connectors are modeled, and analyzed with the commercial software, ANSYS Version 10.1. Stress distribution was evaluated under 150 N vertical load bilaterally on 3 experimental conditions - between canine areas, canine and 2nd premolars, 10 mm posterior to 2nd premolars. RESULTS. Overall, the case of the implant group showed more stress than the case of the teeth group in stress distribution to bone. In stress distribution to superstructures of tooth and implants, there was no significant difference between TH group and IM group and the highest stress appeared in TH-IV and IM-IV. The stress caused from bar was much higher than those of implant and tooth. TH group showed less stress than IM group in stress distribution to abutment teeth and implant. CONCLUSION. The results shows that it is crucial to make sure that distance between impact loading point and abutment tooth does not get too far apart, and if it does, it is at best to set abutment tooth on premolar tooth region. It will be necessary to conduct more experiments on effects on implants, natural teeth and bone, in order to apply these results to a clinical treatment. 연구 목적: 이 연구의 목적은 텔레스코픽 크라운 하악 임플란트 지지 피개의치와 치아 지지 피개의치에서 지대치의 수와 위치에 따른 응력 분산을 비교하기 위함이다. 연구 재료 및 방법: 본 연구에서는 임플란트를 4개 식립하고 임플란트 지지 피개의치로 설계하였고, 식립 위치를 견치와 소구치 부위에 위치 별로 3개 또는 2개 존재시를 실험군으로 설정하였다. 자연치아를 갖는 경우도 견치와 제2소구치 4개를 가진 경우를 대조군으로 설정하고 부위별로 3개 또는 2개를 가지는 경우를 실험군으로 설정하였다. ANSYS Version 10.1 (Swanson, Inc., USA)로 분석하였다. 결과: 악골내 응력의 경우, 전반적으로 임플란트(IM)로만 구성된 경우가 치아(TH)로만 구성된 경우에 비해 응력이 크게 발생하였다. 상부구조의 경우, 치아군(TH)과 임플란트군(IM) 사이의 차이는 크게 없었으며 편측 견치와 제2소구치에 지대치 또는 임플란트가 위치하는 경우 가장 큰 응력이 나타났고 바(bar)에서 발생된 응력이 임플란트와 치아에서 발생되는 응력에 비해 상대적으로 훨씬 크게 발생하였다. 지대치와 임플란트의 경우, 치아군(TH)이 임플란트군(IM)보다 응력이 작게 발생하였다. 결론: 본 연구의 결과로부터 지대치(임플란트 또는 치아)를 설정할 때는 하중작용점과 지대치 사이의 거리가 너무 길어지지 않도록 지대치의 수와 위치를 확보해야 하며 소구치 자리에 지대치를 확보하는 것이 유리하다. 앞으로, 실제 임상에 적용하였을 경우, 임플란트 및 자연치아와 악골에 미치는 결과에 대한 연구가 더 필요할 것으로 생각된다.

      • SCOPUSKCI등재
      • KCI등재후보

        Cyclophosphamide 를 포함한 항암화학요법 후 발생한 간질성 폐렴 3 예

        김경태,박연희,이춘택,이승숙,이진오,강태웅,강윤구,남승모,류백렬,임영혁,김태유,성주병,이영우,장은정,허남현 대한내과학회 1997 대한내과학회지 Vol.53 No.4

        Development of diffuse pulmonary infiltrates in patients receiving chemotherapy is a major diagnostic challenge. Diffuse pulmonary infiltrates may be due to infection, pulmonary hemorrhage, pulmonary edema or drug-induced lung injury. Among these, pulmonary toxicity caused by antineoplastic agent is being recognized more frequently. Cyclophosphamide, an alkylating cytotoxic drug, is used widely in the treatment of malignancies including lymphoma. The incidence of pulmonary toxicity is probably less than 1 percent, and its relation with total dosages and schedule of the drug is not yet defined. The typical pictures of cyclophosphamide-induced pulmonary toxicity are non-productive cough, dyspnea, fever, hypoxemia with respiratory alkalosis and interstitial pneumonitis. However, relatively infrequent pulmonary toxicity of cyclophosphamide and frequent development of infectious pulmonary infiltrate in the patients treated with chemotherapy may hamper the early diagnosis of cyclophosphamide toxicity. Interstitial pattern and unresponsiveness to antibiotics of the pneumonitis might be the clues of suspicion. The best ways to treat the patients with cyclophosphamide toxicity are early diagnosis, discontinuation of the drug and early corticosteroid trial, although usefulness of steroid has not been firmly established. Recently, we experienced three cases of interstitial pneumonitis developing during cyclophosphamide-containing chemotherapy for non-Hodgkin's lymphoma in the absence of neutropenia or thrombocytopenia. Early use of corticosteroid in later two cases could resolve the pulmonary complication completely, whereas the pneumonitis failed to improve in spite of the massive use of multiple antibiotics in the first case.

      • KCI등재

        유휴시간을 활용한 대둔근 강화운동 프로그램이 여고생의 체력 및 대사증후군에 미치는 영향

        김태우(Kim tae wo),장창현(Jang Chang Hyun) 학습자중심교과교육학회 2018 학습자중심교과교육연구 Vol.18 No.5

        The purpose of this study was to investigate for effect of 8 weeks restricted Idle time gluteus maximus training on physical fitness, metabolic syndrome in high school girls. A total of 26 high-school girls were randomly assigned to control roup(CG, n=13) and muscular strength exercise group(EG, n=13). Participants in EG performed of muscular strength, 50 min/session, 3 session/week, for 8 weeks. All the data were producted mean(M) and standard deviation(SD) from SPSS ver.18.0. Two-way ANOVA was used, and Duncan was used to verify the difference of interaction effect. The statistic significant level was set to .05. As for the physical fitness, in cardiopulmonary endurance(p<.01), muscular strength(p<.01), power(p<.05) there were significant differences between pre- and post- values in the exercise group after completing the gluteus maximus training. As for the metabolic syndrome, in waist circumference(p<.01), HDL-C(p<.01) there were significant differences between preand post- values in the exercise group after completing the gluteus maximus training. As a result of the study, it is considered that the exercise program of the gluteus maximus can help the high school girls to improve their physical fitness and prevent the metabolic syndrome because they can participate in the exercise without any time, place. 본 연구는 유휴시간을 활용한 대둔근 강화운동 프로그램이 여고생의 체력 및 대사증후군에 미치는 영향을 살펴보자고 경기도 소재 G고등학교 1학년 여학생 26명을 대상으로 실험을 실시하였다. 연구기간은 2017년 10월부터 11월까지 2개월간 진행 되었으며, 대둔근 중심의 운동프로그램을 학교일과중 유휴시간을 이용하여 8주간 주 3회 50분(준비운동과 정리운동 포함)을 실시하였으며 4주마다 세트수를 증가하여 강도를 조절하였다. 8주간의 대둔근 운동프로그램이 여고생들의 체력, 대사증후군에 미치는 영향을 알아보기 위한 각 항목의 특정 값에 대한 평균(M) 및 표준편차(SD)를 산출하였다. 피검자의 사전 동질성 검사를 알아보기 위하여 독립표본 t검증 (Independent samples t-test)을 실시하였다. 집단간, 시기간, 집단과시기간 상호작용 의 차이를 알아보기 위해 이원변량분석(two way ANOVA)을 실시하였다. 분석결과 통계적으로 상호작용의 유의한 차이가 있을 경우 사후검정 방법으로 Duncan 방식을 실시하였다. 유의수준은 .05로 설정 하였다. 연구결과 첫째, 체력요인은 운동그룹에 서 심폐지구력(p<.01), 근력(p<.01), 순발력(p<.05)에서 통계적으로 유의한 차이가 나타났고, 집단 시기간 상호작용은 나타나지 않았다. 둘째, 대사증후군은 운동그룹에서 허리둘레(p<.01), HDL-C(p<.01)는 통계적으로 유의한 차이가 나타났으며, TG는 통계적으로 유의한 차이가 나타나지 않았다. 연구결과 운동그룹의 변화를 살펴봤을 때 대둔근 운동프로그램은 여고생들이 시간과 장소, 운동기구 등에 구애를 받지 않고 운동참여를 할 수 있어 여고생들의 체력향상, 대사증후군을 예방하는데 도움을 줄 수 있다고 판단되며, 건강한 청소년을 대상으로 예방적 차원의 다양한 운동효과 분석이 필요하다고 판단된다.

      • KCI등재후보

        Aggressive 비호즈킨 림프종의 예후인자 분석과 고위험군 환자 선별을 위한 International Prognostic Index Model

        김경태(Kyung Tae Kim),김태유(Tae You Kim),임영혁(Young Hyuck Im),강윤구(Yoon Koo Kang),이창희(Chang Hee Lee),곽영임(Young Im Kwak),류백렬(Baek Yeol Ryoo),성주병(Ju Byeung Sung),이영우(Young Wo Lee),장은정(Eun Jung Jang),김재학(Jae Ha 대한내과학회 1997 대한내과학회지 Vol.53 No.3

        N/A Objective: Although the therapeutic outcome of aggressive non-Hodgkin's lymphoma (NHL) has been considerably improved by the introduction of combination chemotherapy, many patients still fail to achieve complete response(CR) and/or long-term survival. Because the outcome appears to depend on certain prognostic factors, long term prognosis can be predicted by identification of risk group. And also, the patients in high risk group may benefit from new therapeutic modality. In 1993, the international prognostic index model for aggressive NHL as developed far the purpose of predicting outcome and designing of therapeutic trial. Thus, analysis of prognostic factors was performed to identify independent factors for the end points of CR, overall survival, and disease-free survival. Methods : From 1989 to 1994, total 340 patients were treated with combination chemotherapy and/or radiotherapy for NHL in Korea Cancer Center Hospital. Among 340, informations on eleven prognostic factors(sex, age, performance status, Ann Arbor stage, serum LDH level, tumor size, number of extranodal disease sites, bone marrow involvement, presence of B symptom, sex, time to CR, and histologic grade) were avaliable for 273 patients. Among these, 221 patients with aggressive NHL(NCI clinical schema) were eligible for the prognostic factor analysis for the response and survival. Also, 186 patients were eligible to determine whether International Prognostic Index Model could be applicable for Korean NHL. Results: One hundred fifty patients(68%, 95% CI 62-74%) achieved a complete remission, 43 patients (20%) a partial remission. With a median follow-up of 3,5 years, overall 3 year survival rate was 6396, and 3 year DFS for the 150 CRs was 72%. In a univariate analysis for the CR and survival, Ann Arbor stage, number of extranadal disease, performance status, presence of B symptoms, presence of BM involvement, serum LDH level and histologic grade were found to be statistically significant prognostic factors. Among them, by multivariate analysis, number of extranodal disease(RR 0.2, 95% CI 0.1-0.7), B Symptoms (RR 0.4, 95% CI 0.2-0.9), and histologic grade(RR 0.2, 95% CI 0.08-0.7) showed to be independent adverse prognostic factors for CR. For disease-free survival, Ann Arbor stage(RR 2.6, 95% CI 1.1-6.4) was independent risk factor. For overall survival, number of extranodal involvement(RR 2, 95% CI 1.3-4) and histologic grade(RR 2, 95% CI 1.2-3.7) were independently significant prognostic factors. With these 2 independent prognostic factors for survival, we could establish a prognastic index model which could separate the high risk patients. However, the usefulness of this model should be confirmed in a larger patient population. The dose intensity of cyclophosphamide, during initial 3 months of treatment, was significantly associated with CR rate and overall survival(p=0.01 & 0.03, respectively). When International Prognostic Index Model was applied to our patients, patients in the lower risk groups had significantly better outcome than patients in the higher risk groups(3 year survival and RR: 77% & 1 for low risk group, 61% & 1.9 for low-intermediate risk group, 50% & 2.2 for high-intermediate risk group, and 25% & 6 for high risk group). Conclusion: In this study, we confirmed that features other than the Ann Arbor stage were independently associated with CR and survival, and the International Prognostic Index Model would be an useful tool for the selection of high-risk patients who could be benefited from more aggressive chemotherapy.

      • Analysis of Imported Cargo Radiation Monitoring System in Korea

        Wo Suk Choi,Sung Jun Kim,Jin Ho Son,Hwa Pyoung Kim,Chang Ju Song,Ji Ung Kim,Tae Young Kong 한국방사성폐기물학회 2023 한국방사성폐기물학회 학술논문요약집 Vol.21 No.1

        After the Fukushima nuclear accident in Japan in March 2011, many Koreans were concerned that products exposed to radioactive materials released from the nuclear power plant would be imported into Korea. Systematic radiation monitoring was required for food and daily necessities imported from the nuclear accident area. The need for a legal system to support systematic radiation monitoring was also demanded. The Act on Protective Action Guidelines against Radiation in the Natural Environment was enacted to resolve concerns regarding environmental radiation in Korea in July 2011. According to this law, radiation monitoring equipment has been installed and operated at major airports and ports nationwide. This paper aims to review the radiation monitoring system of the Korean government comprehensively. The legal system and the legal basis for radiation monitoring of imported cargo conducted by each department were investigated by analyzing the laws and regulations of radiation monitoring for the relevant cargo items. In addition, the current status of radiation monitoring by the government departments was examined to determine how radiation monitoring for imported cargo is performed within the legal system. The investigation of the current radiation monitoring system for imported cargo in Korea confirmed that radiation monitoring is conducted by classifying cargo items under the jurisdiction of each government department for all imported cargo. However, the reduction in efficiency of radiation monitoring of imported cargoes, unclear legal grounds for radiation monitoring of imported cargo by some departments, the occurrence of overlapping inspections by departments, and the difficult process of issuing the radiation test certificate required for customs clearance by the Korea Customs Service were also identified. As a result of the analysis, it was found that the current radiation monitoring system for imported cargo in Korea ought to be improved, taking into account efficiency, overlapping inspection, legal background, and the difficult process of issuing the certificates.

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