건물군 인벤토리가 고려된 다차원법을 활용한 홍수피해액 산정

이석호,이석호,김길호,김병식 한국방재학회 2018 한국방재학회논문집 Vol.18 No.7

As a result of recent climate change, flood damage originating from local floods and typhoons has become more frequent, costing many lives and damaging property. Especially in city centers, a large amount of damage can occur due to inundation caused by river flooding. In this study, flood damage area was calculated using the Flo-2D flood inundation model, and the estimated flood damage was calculated using multi-dimensional flood damage analysis. In general, the flood damage rate can be calculated using the area ratio according to the land use in the affected administrative district. However, in this study the flood damage rate was calculated using the flood damage rate proposed in the multi-dimensional flood damage analysis. The estimated flood damage as a function of return period were estimated using the estimated flood damage rate. The flood damage rate estimated using the area ratio was estimated to be at least 51% with a maximum 75% lower than the flood damage rate estimated using the building group, and the total damage was underestimated when the area ratio was used. Therefore, it is necessary to estimate damages using building inventories presented in the multidimensional law for residential and industrial areas. 최근 기후변화로 인해 국지성 집중호우 및 태풍으로 제내지 침수로 인한 홍수피해가 빈번하게 발생하고 있으며, 많은 인명피해와 재산피해가 발생하고 있다. 특히 도심지에서 하천의 범람으로 인한 침수로 많은 피해액이 발생하게 된다. 따라서 본 연구에서는 도심을 흐르는 도시하천인 원주천유역을 대상으로 홍수범람모형인 Flo-2D모형을 이용하여 홍수피해면적을 산정하였으며 다차원법을 이용한 피해액 산정방법을 통하여 빈도별 예상홍수피해액을 산정하였다. 일반적으로 행정구역상 토지이용에 따른 면적비를 이용하여 침수편입률을 산정하나 본 연구에서는 다차원법에서 제시하는 침수편입률 산정방법을 이용하여 산정하였다. 산정 결과 면적비를 이용한 편입률이 건물군을 이용한 편입률 보다 최소 51%, 최대 75% 낮게 산정되었으며 면적비를 이용하였을 때 과소 산정되는 것으로 나타났다. 따라서 다차원법을 이용한 피해액 분석시 주거, 산업의 경우 다차원법에서 제시되고 있는 건물군을 이용하여 피해액을 산정하는 것이 필요하다고 판단된다.

주물에서 기계 가공에 의한 잔류 응력의 제거 공정에 관한 실험적 연구

이석호 釜山大學校 工科大學 1981 工科大學 硏究 報告 Vol.21 No.-

국산 고속도강 드릴의 절삭성에 관한 비교 연구

이석호 釜山大學校 工科大學 1982 工科大學 硏究 報告 Vol.23 No.-

효율성 측도와 손보사 파산 예측

이석호 한국리스크관리학회 2005 리스크 管理硏究 Vol.16 No.2

This study analyzes insolvency prediction models for property-liability insurers using efficiency variables. The results of the study support two principal conclusions. First, this study finds that the efficiency measures, especially cost X-efficiency and revenue scale efficiency, are important factors in identifying and forecasting insurer insolvencies in the property- liability insurance industry. Second, this study also provides evidence that the efficiency variable sets add significant explanatory or discriminatory power to the financial ratio variable sets. From the evidence in this study, new sets of predictors (i.e., the efficiency measures) could contribute and be incorporated in the development of a more efficient and reliable early warning model for insurer insolvency. Especially, the results of this research suggest that regulators should be more concerned particularly with cost X-efficiency (and probably, revenue scale efficiency, too) among the types of efficiency in accessing and identifying potential insurer insolvency.

나노유체를 이용한 2상유동 2성분 루프형 열사이폰

이석호,박종찬,차경일,임택규,이충구,신동륜,박기호 대한설비공학회 2006 설비공학 논문집 Vol.18 No.5

Reported are the heat transfer characteristics of a two-phase loop thermosyphon (TLT) with nanofluids consisted of nano-size silver particles and distilled water as the working fluid. The nanofluids used in the present study are dispersed solutions with various amount of silver nanoparticle in distilled water. It is seen from the present study that the heat transfer performance of the test TLT with nanofluids increased as much as about 2 times higher than that of a TLT with pure water as the working fluid based on same heat flux. The study also showed that there was no deterioration of the TLT performance with time, up to a period of 8 days of continuous operation which implies that there was no coagulation of nanoparticles within the working nanofluid during the operation of the test TLT.

금융 포커스 : 보험사 대출채권의 현황 및 시사점

이석호 한국금융연구원 2009 주간 금융 브리프 Vol.18 No.13

Radiation therapy with chemotherapy for patients with cervical cancer and supraclavicular lymph node involvement

이석호,이승헌,이규찬,이광범,신진우,박찬용,심선진,이준호 대한부인종양학회 2012 Journal of Gynecologic Oncology Vol.23 No.3

Objective: We wanted to evaluate the outcomes of cervical cancer patients with supraclavicular lymph node (SCLN) involvement and who received radiation therapy (RT) combined with chemotherapy. Methods: From August 2001 to April 2009, nine cervical cancer patients with SCLN involvement were treated by RT and cisplatin-based chemotherapy. Most of the patients (8/9, 88.9%) also had a positive para-aortic lymph node (PALN). The RT field was designed to include the whole pelvis, the involved PALNs and the SCLN area. The median SCLN RT dose was 66.6 Gy (range, 60 to 70 Gy). Results: The median follow-up period was 61 months (range, 13 to 98 months). The 3- and 5-year overall survival rates were 66.7% and 55.6%, respectively and the 3- and 5-year progression-free survival rates were 66.7% and 44.4%, respectively. The acute hematologic toxicities according to the criteria of Radiation Therapy of Oncology Group (RTOG) were G1/2 leucopenia in 3 (33.3%), G3/4 leukopenia in 6 (66.7%), G1/2 anemia in 7 (77.8%), G3 anemia in 1 (11.1%), G2 thrombocytopenia in 2 (22.2%), and G3/4 thrombocytopenia in 2 (22.2%). Within 6 months after RT, most of the patients (5/6, 83.3%) recovered from the G3/4 leukopenia, except for 1 patient who received chemotherapy after completing RT due to subsequent bone metastasis. Conclusion: For patients with advanced cervix cancer and SCLN involvement, RT with chemotherapy as active therapy can be expected to provide favorable results, although there is an increased risk of G3/4 hematologic toxicity. Objective: We wanted to evaluate the outcomes of cervical cancer patients with supraclavicular lymph node (SCLN) involvement and who received radiation therapy (RT) combined with chemotherapy. Methods: From August 2001 to April 2009, nine cervical cancer patients with SCLN involvement were treated by RT and cisplatin-based chemotherapy. Most of the patients (8/9, 88.9%) also had a positive para-aortic lymph node (PALN). The RT field was designed to include the whole pelvis, the involved PALNs and the SCLN area. The median SCLN RT dose was 66.6 Gy (range, 60 to 70 Gy). Results: The median follow-up period was 61 months (range, 13 to 98 months). The 3- and 5-year overall survival rates were 66.7% and 55.6%, respectively and the 3- and 5-year progression-free survival rates were 66.7% and 44.4%, respectively. The acute hematologic toxicities according to the criteria of Radiation Therapy of Oncology Group (RTOG) were G1/2 leucopenia in 3 (33.3%), G3/4 leukopenia in 6 (66.7%), G1/2 anemia in 7 (77.8%), G3 anemia in 1 (11.1%), G2 thrombocytopenia in 2 (22.2%), and G3/4 thrombocytopenia in 2 (22.2%). Within 6 months after RT, most of the patients (5/6, 83.3%) recovered from the G3/4 leukopenia, except for 1 patient who received chemotherapy after completing RT due to subsequent bone metastasis. Conclusion: For patients with advanced cervix cancer and SCLN involvement, RT with chemotherapy as active therapy can be expected to provide favorable results, although there is an increased risk of G3/4 hematologic toxicity.

금융 포커스 : 역모기지 활성화를 위한 공적보증체계의 필요성

이석호 한국금융연구원 2005 주간 금융 브리프 Vol.14 No.43

3차원 공간질의를 위한 효율적인 위상학적 데이터 모델의 검증

이석호,이지영,Lee, Seok-Ho,Lee, Ji-Yeong 한국공간정보학회 2011 한국공간정보학회지 Vol.19 No.1

최근 들어 건축과 IT 기술이 발전함에 따라서 대규모의 복잡한 3차윈 공간이 증가하고 있고, 사람들 또한 이러한 공간에서 생활하는 시간이 늘어나고 있는 추세이다. 이에 따라 복잡한 3차원 공간 내에서 유사시를 대비한 또는 편의 정보를 제공하기 위한 서비스가 필요하게 되었고, 이러한 서비스를 제공하기 위해서는 복잡한 공간에서의 효율적인 위상학적 관계성 파악이 기본적으로 뒷받침이 되어야 한다. 공간의 관계성 파악은 위상학적 관계를 저장하고 표현하는 각각의 데이터 모델에 따라 그 방법과 효율성이 달라진다. 위상학적 관계성 저장과 표현에 있어서 가장 널리 사용되어 왔던 데이터 모델은 B-rep 기반의 데이터 모델이고, 2000년대 초반에 들어서는 네트워크 기반 위상학적 데이터 모델에 관한 연구가 많이 진행되었다. 본 연구에서는 데이터 저장 용량 및 공간질의에 대하여 두 데이터 모델의 효율성을 검증한다. 효율성은 데이터의 저장용량, 인접성 및 연결성 질의 응답속도를 기준으로 하여 수행한다. 효율성 검증의 결과로써 네트워크 기반 위상학적 데이터 모델이 3차원 공간질의에 있어서 B-rep 기반 데이터 모델 보다 효율성이 높음을 제시한다. In recent years, large and complex three-dimensional building has been constructed by the development of building technology and advanced IT skills, and people have lived there and spent a considerable time so far. Accordingly. in this sophisticatcd three-dimensional space, emergencies services or convenient information services have been in demand. In order to provide these services efficiently, understanding of topological relationships among the complex space should be supported naturally. Not on1y each method of understanding the topological relationships but also its efficiency can be different depending on different topological data models. B-rep based data model is the most widely used for storaging and representing of topological relationships. And from early 2000s, many researches on a network based topological data model have been conducted. The purpose of this study is to verify the efficiency of performance on spatial queries. As a result, Network-based topological data model is more efficient than B-rep based data model for determining the spatial relationship.

근육위축가쪽경화증 환자에서 뒤정강신경/ 엄지벌림근부위에서 시행한 신경생리학적 지표의 유용성

이석호,김현영,김주한,김승현 대한신경과학회 2008 대한신경과학회지 Vol.26 No.4

Background: Neurophysiological Index (NI) is a sensitive measure of changes during the course of amyotrophic lateral sclerosis (ALS). However, NI applied at the ulnar nerve has limitation in that the initial manifestation of ALS is different among individual patients. This study was aimed to evaluate the efficiency of NI applied to the posterior tibial nerve system in a prospective study of progression in ALS patients. Methods: The subjects of the study were 22 patients with definite or probable ALS based on revised EL Escorial criteria. NI applied to the ulnar nerve/abductor digiti minimi muscle and the posterior tibial nerve/abductor hallucis muslce, revised ALS functional rating scale, Norris scale, and grip power were obtained at four and eight months of the follow-up. Results: Overall, NI at both ulnar and posterior tibial nerve systems showed a significant interval change at 4 and 8 months. Although NI in both nerve systems showed significant changes at an interval of 4 months in patients with upper limb onset, NI obtained from the ulnar nerve did not show a difference from the baseline in the lower limb onset patients. Moreover, there was a significant change of NI in the early stage ALS patients, compared to the late stage patients. Conclusions: In the lower limb onset patients, NI obtained from the posterior tibial nerve is more useful in evaluating the disease progression pattern. Moreover, NI is more effective in the evaluation of the patients in the early stage. Background: Neurophysiological Index (NI) is a sensitive measure of changes during the course of amyotrophic lateral sclerosis (ALS). However, NI applied at the ulnar nerve has limitation in that the initial manifestation of ALS is different among individual patients. This study was aimed to evaluate the efficiency of NI applied to the posterior tibial nerve system in a prospective study of progression in ALS patients. Methods: The subjects of the study were 22 patients with definite or probable ALS based on revised EL Escorial criteria. NI applied to the ulnar nerve/abductor digiti minimi muscle and the posterior tibial nerve/abductor hallucis muslce, revised ALS functional rating scale, Norris scale, and grip power were obtained at four and eight months of the follow-up. Results: Overall, NI at both ulnar and posterior tibial nerve systems showed a significant interval change at 4 and 8 months. Although NI in both nerve systems showed significant changes at an interval of 4 months in patients with upper limb onset, NI obtained from the ulnar nerve did not show a difference from the baseline in the lower limb onset patients. Moreover, there was a significant change of NI in the early stage ALS patients, compared to the late stage patients. Conclusions: In the lower limb onset patients, NI obtained from the posterior tibial nerve is more useful in evaluating the disease progression pattern. Moreover, NI is more effective in the evaluation of the patients in the early stage.