오픈 스쿨 (Brain Desk) : 저소득층 자녀를 위한 무료 동영상 강의 시스템 설계(오픈스쿨) -집단지성 활용

이호준,황희재,최우진,이호준,허미란 한국산업경영시스템학회 2014 한국산업경영시스템학회 학술대회 Vol.2014 No.추계

寄生蟲으로 因한 膽道系疾患

李浩濬 최신의학사 1961 最新醫學 Vol.4 No.2

大學敎育에 있어서 漢字사용의 필요성

李浩俊 전국한자교육추진총연합회 1999 한글한자문화 Vol.5 No.-

고속도로에서의 자율주행 알고리즘 개발 및 평가를 위한 다차량 시뮬레이션 환경 개발

이호준,정용환,민경찬,이명수,신재곤,이경수,Lee, Hojoon,Jeong, Yonghwan,Min, Kyongchan,Lee, Myungsu,Shin, Jae Kon,Yi, Kyongsu 한국자동차안전학회 2016 자동차안전학회지 Vol.8 No.4

Since real road experiments have many restrictions, a multi-vehicle traffic simulator can be an effective tool to develop and evaluate fully automated driving systems. This paper presents multi-vehicle environment simulation tool to develop and evaluate motorway automated driving systems. The proposed simulation tool consists of following two main parts: surrounding vehicle model and environment sensor model. The surrounding vehicle model is designed to quickly generate rational complex traffic situations of motorway. The environment sensor model depicts uncertainty of environment sensor. As a result, various traffic situations with uncertainty of environment sensor can be proposed by the multi-vehicle environment simulation tool. An application to automated driving system has been conducted. A lane changing algorithm is evaluated by performance indexes from the multi-vehicle environment simulation tool.

Epidemiology and Management of Iatrogenic Vertebral Artery Injury Associated with Cervical Spine Surgery

이호준 대한신경손상학회 2022 Korean Journal of Neurotrauma Vol.18 No.1

Iatrogenic vertebral artery injury (VAI) caused by surgical interventions involving the cervical spine is an uncommon but catastrophic complication associated with high morbidity or mortality due to ischemic stroke, intra- or extra-dural hemorrhage, and the formation of pseudoaneurysm or arteriovenous fistulae. In cervical spine surgeries, VAI may occur during the peri- or postoperative period. This may be induced by an anterior or posterior surgical approach. Despite advanced imaging techniques and increased anatomical knowledge, VAI during cervical spinal surgery remains a challenge. Techniques for managing VAI include hemostatic tamponade, ligation, microvascular repair or anastomosis, and endovascular management. We need to consider the risk of iatrogenic VAI as a complication in patients undergoing cervical spine surgeries and a better understanding of its mechanism and proper management.

동해의 지진해일, 그 위험과 대책

이호준 한국방재학회 2005 한국방재학회지 Vol.5 No.1

12월 20일, 성탄절 이튿날 지구촌은 최악의 대재앙을 실감했다. 인도네시아 수마트라 앞바다에서 발생한 M9.0의 강진과 함께 지진해일이 인근 연안에 내습하여 근 30만 명의 목숨을 앗아갔다. TV를 통해 비추어지는 참담한 모습만으로도 그 공포를 실감할 수 있었다. 온 세계가 지진해일의 공포를 느끼고, 그 위험에 대해 인식하기 시작했으며, 국제적 차원에서의 대책마련에 관심이 집중되고 있다. 지진해일 경보 미비, 피해자들 대부분이 지진해일에 대한 지식과 대처요령을 터득하지 못했으며, 저빈도 재해로서 피해국이 투자우선순위를 뒤로하였던 공통점이 이번 대규모 인명피해에 대한 직접 원인이라는 지적이 제시되고 있는 한편으로, 그동안 선진국을 중심으로 발전해 오던 지진해일 대책에 대한 취약점이 지적되면서 대책의 수정이 필요하게 되었다 경보체제의 정비를 뒤로하더라도, 주민의 방재의식과 재해에 대한 지식 함양을 지진해일재해에 대한 직접적 해결책으로 선진국들은 주장하고 있다. 본 고에서는 그 위력과 예측불허의 특성 때문에 지구상의 대재앙으로 여기는 지진해일에 대하여 우리가 처해 있는 위험환경과 대책마련에 있어서의 문제점에 대해 짚어 보고자 한다.

Effect of Mixing Ratio of Non-Spherical Particles in Colloidal Silica Slurry on Oxide CMP

이호준,이다솔,김문성,정해도 한국정밀공학회 2017 International Journal of Precision Engineering and Vol.18 No.10

Colloidal silica and fumed silica are common slurry materials for oxide chemical mechanical polishing (CMP). Non-spherical colloidal silica particles are manufactured via a multi-step feeding method to compensate for the material removal rate of colloidal silica slurry, which is lower than that of fumed silica slurry. Additionally, mixed abrasive slurry has been used by combining nonspherical and spherical colloidal silica particles. Experiments were conducted on a 4-inch wafer with silicon dioxide film (SiO2, 1- μm thick) and KOH-based colloidal silica slurry. The slurry had spherical colloidal silica particles with the size of 30 nm and 70 nm and non-spherical colloidal silica particles with the size of 70 nm. Effects of different colloidal particles in the oxide CMP were observed under the same pH condition in order to achieve high material removal rate. The mixing ratios were 2:1, 1:1, and 1:2 respectively. The analysis of the particle combinations showed that the mixing of particles with different sizes caused agglomeration and increased the material removal rate. The relatively smaller spherical particles improved the surface roughness and overall performance, especially when mixed with non-spherical particles. Such mixtures of particles with different sizes and shapes mixed at an appropriate ratio can outperform the fumed silica slurry.

Effect of Non-Spherical Colloidal Silica Particles on Removal Rate in Oxide CMP

이호준,김문성,정해도 한국정밀공학회 2015 International Journal of Precision Engineering and Vol. No.

Oxide CMP generally has used colloidal silica slurry and fumed silica slurry. To compensate the lower removal rate (RR) of colloidal silica slurry compared to the one of fumed silica slurry, the multi-step feeding method was used to produce a non-spherical silica particle, for which the existing spherical colloidal silica particle was combined with two to three particles. To improve the performances, the prepared non-spherical colloidal silica particles were assessed by both single and mixed abrasive slurry. The slurry has two different sizes, 30 nm and 70 nm, of spherical colloidal silica particles and 70nm of non-spherical colloidal silica particles. Through the experiments, it was found out that non-spherical colloidal silica slurry had the higher RR than spherical colloidal silica slurry, and its RR was similar to the one of fumed silica slurry. For mixed abrasive slurry, the combinations of spherical and spherical or spherical and non-spherical showed higher RR, which were 152.8% higher than single abrasive slurry and 19.3% higher than fumed silica slurry, and better surface roughness than the fumed silica slurry. Therefore, non-spherical colloidal silica particles are found to be efficient to gain a higher RR and a better surface roughness than the ones of fumed silica particles.

C-phycocyanin-doxorubicin conjugate for synergistic chemo-photodynamic tumor therapy

이호준,김민아,김예슬,박지선,김진,김동운,윤순도,이창문 한국공업화학회 2019 한국공업화학회 연구논문 초록집 Vol.2019 No.1

C-Phycocyanin (CPC), a natural blue-colored pigment, is attracting attention due to its unique photodynamic activity, anti-inflammatory and anticancer properties. The aim of this study is to synthesize and evaluate a C-phycocyanin-doxorubicin (CPD) conjugate as a synergistic chemo-photodynamic tumor therapeutic agent. The CPD conjugate was successfully synthesized and formed self-assembled nanospheres in aqueous solution. After 635 nm laser irradiation, reactive oxygen species (ROS) in CT26 cells by CPC treatment was generated effectively. In addition, the production of ROS in CT26 cells by CPD treatment after the laser irradiation increased effectively enough to kill tumor cells. All these results indicate that CPD could become an attractive agent for chemo-photodynamic tumor therapy.

Analysis of Removal Mechanism on Oxide CMP using Mixed Abrasive Slurry

이호준,정해도 한국정밀공학회 2015 International Journal of Precision Engineering and Vol.16 No.3

Mixed abrasive slurry (MAS) is one of the non-traditional slurries with more than two different sizes, shapes or materials of abrasiveswhich are to improve a chemical mechanical polishing (CMP) performance such as a removal rate. This paper focuses on the MASmixed with two different sized abrasives and controlled by mixing ratio. Hybrid effect of the MAS was investigated from the removalmechanism of the mixed abrasives on oxide film. Experiments have been implemented with a 4-inch wafer with silicon dioxide filmand KOH-based colloidal silica slurries. The slurry has two different sizes, 30 nm and 70 nm, with concentration of 1~30 wt%. Theeffects of abrasive concentration and mixing ratio were investigated in the oxide CMP in order to achieve high removal rate. Duringthe oxide CMP with the MAS, the contact condition of abrasives was changed by mixing ratio. Through the experiment, it could beseen that two-body and three-body abrasions occur in mixed abrasive slurry according to the particle concentration. Finally, we couldsee that the proper ratio to achieve high removal rate was 2:1 (D30:D70) since most of the abrasives were active in material removaland carried out two-body abrasion.