BIM 모델과 증강현실을 활용한 교량 유지관리방안 연구

최웅규,PA PA WIN AUNG,산육타 아라비카,차기춘,박승희 대한토목학회 2024 대한토목학회논문집 Vol.44 No.1

Bridges, which are construction structures, have increased from 584 to 38,405 since the 1970s. However, as the number of bridges increases, the number of bridges with a service life of more than 30 years increases to 21,737 (71%) by 2030, resulting in fatal accidents due to basic human resource maintenance of facilities. Accordingly, the importance of bridge safety inspection and maintenance measures is increasing, and the need for decision-making support for supervisors who manage multiple bridges is also required. Currently, the safety inspection and maintenance method of bridges is to write down damage, condition, location, and specifications on the exterior survey map by hand or to record them by taking pictures with a camera. However, errors in notation of damage or defects or mistakes by supervisors are possible, typos, etc. may reduce the reliability of the overall safety inspection and diagnosis. To improve this, this study visualizes damage data recorded in the BIM model in an AR environment and proposes a maintenance plan for bridges with a small number of people through maintenance decision-making support for supervisors. 건설구조물인 교량은 1970년대 이후 584개소에서 38,405개소로 증가하였다. 하지만, 교량의 개소가 증가하면서 공용연수 30년 이상인 교량이 2030년까지 21,737개소로(71%) 증가하면서 시설물에 대한 인적자원 기본 유지보수에 따른 인명사고가 발생할 수 있다. 이에 따라 교량의 안전점검 및 유지관리 방안의 중요성이 높아지고 있으며, 다수의 교량을 관리하는 감독자의 의사결정 지원의 필요성도 요구되고 있다. 현재 교량의 안전점검 및 유지관리 방법은 외관조사망도에 손상 및 상태, 위치, 규격 등을 수기로 기입하거나, 카메라로 촬영하여 기록하는 방식을 사용하고 있지만, 손상ㆍ결함의 표기 오류나 감독관의 착각, 오타 등으로 인해 안전점검 및 진단 전체의 신뢰성이 저하될 수 있다. 이를 개선하기 위해 본 연구에서는 BIM 모델에 기록된 손상데이터를 AR 환경에 시각화하고, 감독자의 유지관리 의사결정 지원을 통해 소수의 인원이 많은 교량의 유지관리 방안에 대해 제안한다.

재난관리를 위한 인공지능 분석 모델 연구

최웅규,이성호,정종수 한국재난정보학회 2018 한국재난정보학회 학술대회 Vol.2018 No.11

본 논문에서는 선행연구를 통해 기준이 되는 AI 프레임워크를 설계하고 국내·외 사용되고 있는 AI 방법론에 대한 문헌조사 및 포커스 그룹 인터뷰를 통해 단계 별 최적의 표준화된 AI 분석모델을 연구 하였다. 본 연구 모델은 Business Value에서 출발하여 Economics까지 총 6개의 Component로 구성되어 있으며 데이터, 프로세스, 시스템 및 거버넌스 Framework를 준용한다. Decision Health Check 단계 에서는 데이터 분석 기반의 의사결정의 수준을 Process, Data, 조직, System 관점의 진단을 통해 AI 분석 활용을 위한 Enablement 정의 기초자료를 도출한다. 기초자료는 본 연구에서 검증된 AI 데이터 분석방안 과 모델링을 통해 특성요인(주요 변수, 후보변수)의 비즈니스 가설을 검증하고 데이터의 적합성을 평가 한다. 이는 AI기반의 효과적인 자원 관리(Resource management)뿐만 아니라 재난전조정보 예측 및 지능 의사결정을 위한 평가 도구로 활용 될 수 있다.

Hand Injury Patterns Caused by Different Electric Saws in South Korea

최웅규,김준현,김영준,남상현,최영웅 대한수부외과학회 2016 대한수부외과학회지 Vol.21 No.1

Purpose: Electric saw is widely used and patients involved with the tool are increasing. We made efforts to analyze data of saw-related hand injuries. Methods: Electric saw-related hand injuries that required operation were analyzed retrospectively by reviewing medical charts, clinical photographs and Xray films from 2009 through 2013. Additionally, we interviewed patients regarding the type of electric saw involved (hand-held/table-mounted) and how the hand was injured. Results: There were 16 male patients with 19 injured fingers and 22 injured tendons. Due to the damaging mechanism of the electric saw, injuries were severe and complex such as tendon, bone defects, fractures and amputations. 4 fingers had open fractures. Separately, 4 were amputated. Non-dominant hands were injured more by hand-held saw, while, dominant hands were damaged more by table-mounted saw. The thumb and index fingers were injured mostly by electric saw. Probability of dominant and non-dominant hand injury depends on the types of electric saw because of the working position when using this tool. Conclusion: Hand injuries can be classified according to the type of electronic saw used. Complete understanding of a specific trauma mechanism and the resulting injury patterns is important especially for hand surgeons. Surgeons should take into account the type of electric saw when examining patients. However, the most important step to prevent these types of injuries is to provide all workers with appropriate training and precautions before using the electric saw.

응고제와 침지제의 pH 조절에 따른 곤약의 저장성 강화

최웅규 한국식품위생안전성학회 2019 한국식품위생안전성학회지 Vol.34 No.1

In this study, viable cells, coliforms and food poisoning bacteria were identified according to the pH levels of the coagulant and immersion liquid during each stage in the production of konjac, and storage stability was confirmed for 3 months. A considerable number of bacteria were found in the raw material, or powdered konjac (Amorphophallus konjac), as well as in the processing water. However, it has been shown that the plastic package were safe from microorganisms. Due to the high pH of the added coagulant [2.0% Ca(OH)2], no contaminating bacte-ria were observed after konjac jelly formation. Coliforms were not detected any of the tested steps. During the mold-ing process, the pH of konjac was adjusted to 9.5 ~ 12.5 at intervals of 0.5, and the number of bacteria was determined. As a result, no bacteria were detected in the alkaline range above pH 11.5. The pH of the immersion liquid was adjusted to 10.0 ~ 12.5, and after hardening, the konjac were stored at room temperature for 12 weeks. As a result, no bacteria, Escherichia coli or other food poisoning bacteria were detected at pH 11.5 or higher. Based on these results, it is expected that when the pH levels of the konjac and its immersion liquid are maintained at 11.5, it should be pos-sible to keep the product for 3 months without additional sterilization process.

Ocular Complications in Assault-Related Blowout Fracture

최웅규,김영준,남상현,최영웅 대한두개안면성형외과학회 2016 Archives of Craniofacial Surgery Vol.17 No.3

Background: Blowout fracture is one of the most common facial fractures, and patients usually present with accompanying ocular complications. Many studies have looked into the frequency of persistent ocular symptoms, but there is no study on assault patients and related ocular symptoms. We evaluated the incidence of residual ocular symptoms in blowout fractures between assaulted and non-assaulted patients, and sought to identify any connection among the degree of enophthalmos, defect size, and assault-related injury. Methods: A retrospective review was performed for any patient who sustained a unilateral blowout fracture between January 2010 to December 2014. The collected data included information such as age, gender, etiology, and clinical ocular symptoms as examined by an ophthalmologist. This data was analyzed between patients who were injured through physical altercation and patients who were injured through other means. Results: The review identified a total of 182 patients. Out of these, 74 patients (40.7%) have been struck by a fist, whereas 108 patients (59.3%) have sustained non-assault related injuries. The average age was 36.1 years, and there was a male predominance in both groups (70 patients [94.6%] in the assaulted group and 87 patients [80.6%] in the non-assault group). Diplopia and enophthalmos were more frequent in patients with assault history than in non-assaulted patients (p <0.05). Preoperatively, 25 patients (33.8%) with assault history showed diplopia, whereas 20 patients (18.5%) showed diplopia in the non-assaulted group (p <0.05). Preoperative enophthalmos was present in 34 patients (45.9%) with assault history, whereas 31 patients (28.7%) showed enophthalmos in the non-assaulted group (p <0.05). Conclusion: : Patients with an assault history due to a fist blow experienced preoperative symptoms more frequently than did patients with non-assault-related trauma history. Preoperative diplopia and enophthalmos occurred at a higher rate for patients who were assaulted. Surgeons should take into account such characteristics in the management of assaulted patients.

상염색체 열성 다낭신 4례

최웅규,이승철,박용원,이종국,Choi Woong-Kyu,Lee Seung-Cheol,Park Yong-Won,Lee Chong-Guk 대한소아신장학회 1997 Childhood kidney diseases Vol.1 No.1

Polycystic kidney disease is defined as a heritable disorder with diffuse involvement of both kidneys without dysplasia other than cysts. The major clinical entities of autosomal recessive polycystic kidney disease and autosomal dominant polycystic kidney disease have a considerable overlap in clinical presentations and radiographic features in the pediatric population. We experienced three cases of autosomal recessive polycystic kidney disease of neonate who expired within 24 hours due to respiratory difficulty and the other case was detected by gross hematuria. So we report four cases with brief review of literatures.

40세 이상 환자에서 심방중격결손의 치료

최웅규,박용원,구본일,오상준,이홍섭,최석구,김상우 인제대학교 1998 仁濟醫學 Vol.19 No.2

심방중격결손증은 성인 연령층에서 발견되는 가장 흔한 선천성 심질환으로, 외과적 교정을 받지 않은 중년의 환자에서는 점차 폐고혈압, 심방부정맥, 울혈성 심부전, 심방세동, 색전증 등의 빈도가 점차 증가한다. 인제대학교 서울백병원에서 1988년 5월부터 1997년 5월까지 지난 10년간 40세 이상 중년에 이차공성 심방중격결손증을 가진 20명의 환자에 대하여 직접 봉합술을 실시하였다 수술의 결과는 좋았고 수술 후 사망은 없었으며, 고연령을 포함한 모든 환자들은 수술 후 적어도 NYHA(New York Heart Association) functional class I 이상의 개선이 있었다. 그러므로 성인의 심방중격결손의 치료에 있어서 고령이거나, 어느 정도의 폐동맥 고혈압이 동반되더라도 수술을 시도하는 것이 최선의 치료가 될 것으로 생각되는 바이다. This study showed clinical results of 20 patients aged 40 years or older undergoing surgical repair of isolated secundum atrial septal defect at Inje university, Paik hospital during the period from May 1988 to May 1997. ASD was closed with direct suture in all patients. Responses to surgery were excellent. We had no operative mortalities, and good clinical improvements of more than one class according to New York Heart Association functional classification. An old age was not a contraindication to surgery.

흰쥐에서 회장의 장막근육 절편을 이용한 방광확장술

최웅규,임수길 가톨릭대학 (가톨릭신학대학) 대학원 1993 가톨릭大學醫學部 論文集 Vol.45 No.1

쥐에서 회장을 이용한 방광확장술시 Octreotide의 점액분비 감소효과

최웅규,윤문수 大韓泌尿器科學會 1993 Korean Journal of Urology Vol.34 No.4

완전 관해를 보였던 급성 골수성 백혈병 환자의 신장에 발생한 과립성 육종 1례

최웅규,이충범,윤재영,조용현,윤문수,임수길 大韓泌尿器科學會 1992 Korean Journal of Urology Vol.33 No.2