유체 거동 소음 해석 자동화 시스템 개발

전완호(Wanho Jeon),김정일(Jungill Kim),김연호(Younho Kim),임태균(TaeGyun Lim),김재우(Jaewoo Kim) 한국소음진동공학회 2016 한국소음진동공학회 학술대회논문집 Vol.2016 No.4

냉간 아이들시 Cam Phasing 최적화에 의한 배출가스 저감에 관한 연구

김완호(Wanho Kim),박성서(Sungseo Park),최병남(Byungnam Choi) 한국자동차공학회 2007 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-

The fuel and spark control of gasoline engines at cold idle is a dominant factor to meet the exhaust emission regulations being reinforced recently. The engine control of cold idle phase has to be optimized to get low emissions enough to meet the regulations and good stability customers are satisfied with. In this study, we improved engine stability and reduced exhaust emissions by optimizing cold idle cam phasing after engine start.

동맥경화의 미세환경에서 대식세포의 사멸에 의한 혈관세포의 기능적 변화에 대한 가시화

김완호(Wanho Kim),손제구(Jegoo Son),전성윤(Sungyun Jeon) 한국가시화정보학회 2017 한국가시화정보학회지 Vol.15 No.3

The apoptosis of macrophages occurs throughout all stages of atherosclerosis. It is known to constitute atheromatous plaque, increase plaque instability, and thus contribute to the development of atherosclerosis. However, there still remains much to be elucidated on how the apoptotic macrophages affect the endothelial cells and also how they contribute to the development of atherosclerosis. Here we present a microfluidic system, which enables co-culture of apoptotic macrophages and endothelial cells in fibrin gel that mimics in vivo extracellular matrix. With the system, we can investigate the effect of macrophage apoptosis on vascular endothelial cells by quantitatively analyzing the level of reactive oxygen species of HUVECs, integrity of VE-cadherin and cell proliferation. We expect that this system could be utilized further for understanding different mechanisms of apoptotic macrophage on the development of atherosclerosis.

19세기 開城府 管理營 문서의 고문서학적 특징과 가치 - OCI 미술관 소장 고문서를 중심으로 -

김완호 ( Kim Wanho ) 한국고문서학회 2024 古文書硏究 Vol.64 No.-

본고는 OCI 미술관에 소장된 개성 지역 고문서를 대중에게 처음 공개하는 글이다. 먼저, 문서의 작성 및 내용의 신빙성을 담보하기 위해 문서의 정보를 토대로 작성 시기와 지역을 검토하였다. 또한 문서의 발급자, 서압, 인장 등을 세부적으로 분석하였다. 그리고 인접 학문 분야에서 활용할 수 있는 1차 사료로서의 가치를 밝혔다. OCI 미술관에 소장된 97건의 문서들은 1863년 개성부 관리영에서 작성되었다. 문서는 대체로 창고직인 내감(內監)이 결재하였는데, 이 문서들을 활용하여 작성한 개성부 관리영의 하기(下記)도 남아 있다. 내감이 결재한 문서 중 일부는 비장(裨將)이 결재하기도 하였는데, 문서의 서압과 인장을 검토하여 이들이 동일 인물일 가능성을 제시하였다. 내용적으로는 관원 및 원역이 개성을 지나갈 때 작성한 문서와 창고에서 지출한 내역을 작성한 문서로 구분하였다. 이 문서들을 바탕으로 하기를 작성한 것으로 추론하였다. This article is the first to reveal to the public ancient documents from the Kaesong region housed at OCI Museum of Art. First, to ensure the credibility of the documents and their content, the time and the region of their creation were reviewed based on the information about the documents. In addition, the issuers, signatures, and seals of the documents were analyzed in detail. And the value as primary historical research material was examined that can be used in adjacent academic fields. The 97 documents housed at OCI Museum of Art were made by Kaesongbu Gwanliyeong Management Office in 1863. The documents were generally approved by the Naegam(內監), a warehouse official, and the following records of the Gaeseongbu Gwanliyeong Management Office prepared using these documents also remain. Some of the documents approved by the Naegam were also approved by the Bijang(裨將), and the possibility that they were the same person was suggested by examining the documents’ signatures and seals. In terms of content, the documents were divided into two categories; documents written by officials and minor officials when passing through Gaeseong, and documents written about details of expenditure from the warehouse. It was inferred that the following records were made based on these documents.

[응용논문] 소음예측을 위한 연료저장장치의 자동해석 시스템 구축 기술 개발

김재우(Jaewoo Kim),박기동(Kidong Park),김정일(Jungill Kim),김연호(Younho Kim),최익황(Ikhwang Choi),전완호(Wanho Jeon),김덕윤(Deokyun Kim) 한국자동차공학회 2018 한국 자동차공학회논문집 Vol.26 No.5

In this study, an automation system platform is developed to estimate fuel tank noise caused by sloshing. Due to the lack of suitable analysis techniques for users, the design and development of the fuel tank are evaluated mostly through testing. Based on this developed automation system, it is possible to evaluate fuel tank performance, and estimate sloshing noise directly. On the main screen of the platform, the user could specify a modified CAD file and a project directory-arranged analysis condition. Engineers could confirm the result of the analysis through a visualized material by relying on the automation system of this study. The result of the analysis on fuel tank sloshing was compared with a test result that was based on the trend video of the fuel tank internal medium. When the result of the modal test was compared with the result of the noise analysis, the mean error was 3.2 %, and the maximum error was 8.1 %, respectively. In the near future, the integration platform would be based on an extended development with structural analysis.

장애인보조기구의 효율적 품질관리 방안 제시

고석기(Seokki Ko),김완호(Wanho Kim),서원산(Wonsan Seo),허가영(Gayoung Heo) 한국HCI학회 2017 한국HCI학회 학술대회 Vol.2017 No.2

본 연구는 2015 년에 제정된 『장애인·노인 등을 위한 보조기기 지원 및 활용촉진에 관한 법률』을 근거로 장애인보조기구 교부사업 교부품목의 품질을 관리하기 위한 방안으로 교부품목의 등록기준을 제시하고, 교부품목에 대한 등록제를 실시하였다. 또한, 보건복지부에서는 등록된 제품을 장애인보조기구 교부사업을 통하여 장애인에게 지원하도록 권고하였다. 이에 따라 장애인보조기구 취급 업체의 적극적인 등록제 참여를 유도하여, 보조기구의 품질관리 방안으로 제시하고자 한다.

장애인보조기구 교부사업 이용실태 및 교부품목 만족도 조사

허가영(Gayoung Heo),김완호(Wanho Kim),고석기(Seokki Go),서원산(Wonsan Seo) 한국HCI학회 2017 한국HCI학회 학술대회 Vol.2017 No.2

본 연구는 2015 년 장애인보조기구 교부사업 수급자를 대상으로 장애인보조기구 교부사업 이용실태 및 교부품목 만족도를 조사한 연구이다. 연구결과, 교부사업 신청 상담 및 설명은 교부사업 담당공무원을 통해 가장 많이 받았으며, 교부품목의 전반적인 만족도는 3.5 점으로 나타났다.

수치해석을 통한 단일형 현장타설말뚝 외부강관의 적정 보강길이 산정

양우열(Wooyeol Yang),김완호(Wanho Kim),이강일(Kangil Lee) 한국지반환경공학회 2021 한국지반환경공학회논문집 Vol.22 No.6

교각기초 형식으로 적용되는 기초공법 중 하나는 단일형 현장타설말뚝이다. 이 말뚝에 대한 설계 시 주된 관심사항은 말뚝체에 작용하는 수평지지력 확보 여부이다. 현재 말뚝체의 강성증가를 위해 외부강관으로 말뚝체를 보강하여 말뚝의 수평지지력을 증가시키는 방법이 활용되고 있다. 그러나 지반조건에 따라 외부강관의 보강효과와 적정 강관보강 길이가 달라질 수 있음에도 이에 대한 연구가 미흡하여 현장에서는 대부분 말뚝체 전체를 외부강관으로 보강하고 있다. 그러나 시스템 내의 전체 말뚝길이를 외부강관으로 보강할 경우 공사 지연과 공사비의 증가로도 이어질 수 있다. 따라서 좀 더 효과적으로 외부강관을 활용하기 위해서는 외부강관으로 보강된 말뚝체를 대상으로 말뚝의 수평지지특성을 평가하여 강관의 적정한 보강길이를 결정해야 한다. 이에 본 연구에서는 수치해석방법을 통해 각 조건별 외부강관의 보강길이를 적용한 단일형 현장타설말뚝의 말뚝체에 대한 지지특성을 평가하고, 이 해석결과를 바탕으로 외부강관의 적정 보강길이를 제안하였다. 본 연구결과, 단일형 현장타설말뚝의 말뚝체에 대한 수평지지력을 효과적으로 증가시키기 위해서는 강관의 보강길이가 말뚝의 휨거동 영향범위인 1/β의 2배를 적용해야 하는 것으로 나타났다. One of the construction methods applied as a pier foundation type is a single type cast-in-place pile. In applying a pile bent system as a foundation type, the main concern in designing can be said to secure the lateral bearing capacity of pile structure in system. In addition, to increase the rigidity of the pile structure, a method of increasing the lateral bearing capacity by reinforcing the pile structure with a casing has been used. However, although the reinforcing effect and appropriate reinforcing length of casing may vary depending on the soil conditions, there is insufficient studies on this, and for this reason, the entire pile structure in a pile bent system is reinforced with a casing, in the field. In addition, if the length of the entire pile is reinforced with a casing, it may lead to delays in construction and increase in construction costs. That is, in order to more effectively reinforce the pile structure with a casing, it is necessary to study the lateral bearing characteristics of the reinforced pile structure in system. And it should be determined the appropriate reinforcing length of the casing from the evaluated bearing characteristics. Therefore, in this study, the lateral bearing characteristics of piles applied with the reinforcing length of casing for each condition were evaluated through a numerical analysis. And, based on the analysis results, the appropriate reinforcing length of casing was proposed. As a result of the study, it was found that in order to effectively increase the lateral bearing capacity of pile structure, the reinforcing length of casing should be applied twice the influence range of the bending behavior of the pile, 1/β.

음향창 박리에 따른 음향특성해석

강명환(Myunghwan Kang),정병규(Byungkyoo Jung),김완호(Wanho Kim),서영수(YoungSoo Seo) 한국소음진동공학회 2019 한국소음진동공학회 학술대회논문집 Vol.2019 No.2

70세 이상 노령환자에서 척추관 협착증의 수술적 치료

하기용,Wee, Dennis,장정호,김완호 대한척추외과학회 1997 대한척추외과학회지 Vol.4 No.1

Study Design : A retrospective analysis was performed on 19 patients, aged 70 years or over, who had decompressive surgery with or without fusion for degenerative lumbar stenosis. Objective : To analyze the result of spinal surgery in elderly patients with degenerative lumbar stenosis and to present possible complication following surgery. Summary of Background Data : In elderly patients who had degenerative lumbar stenosis, decompression is the most important factor in relieving symptoms and that the addition of spinal fusion would increase the postoperative morbidity. The long-term outcome of decompressive surgery in the elderly does not differ from that reported for younger patients. Methods : All patients were divided into 2 groups by surgical method. One group, consisting of 8 patients, underwent decompressive laminectomy and the other group, consisting of 11 patients, underwent decompressive laminectomy and fusion with instruments. The comparative analysis was performed between decompressive group and fusion group. Results : Overall, 72.5% of the patients had an excellent and a good results. There was no differences of overall clinical outcome between two surgical groups. As a complication, there was no significant complication in a decompressive group. In a fused group, however, significant complication developed. One patients died of unknown origin immediately after surgical intervention for failed back surgery syndrome. Radiographic nonunion and fracture adjacent to fused segments developed in one, respectively. Conclusions : Extra-careful preoperative evaluation must be done in order to recognize and minimize perioperative complications associated with major surgeries in more fragile patients especially who had failed back surgery syndrome. Wide decompressive laminectomy for spinal stenosis with segmental instability should be performed with fusion concomitantly to prevent postoperative instability regardless of patient's age.