무색 인공수정체렌즈안과 광변색 인공수정체안에서의 수술 전후 스트레이라이트의 비교

김인혁,황형빈,신승주,정성근,In Hyuk Kim,MD,Hyung Bin Hwang,MD,Seung Joo Shin,MD,Sung Kun Chung,MD,PhD 대한안과학회 2014 대한안과학회지 Vol.55 No.2

Purpose: To compare visual acuity and intraocular straylight after implantation of clear and photochromic intraocular lenses (IOLs) in a mesopic lighting condition. Methods: Clear IOLs were implanted in 95 eyes of 72 patients (clear IOL group), and photochromic IOLs were implanted in 22 eyes of 16 patients (photochromic IOL group). Best-corrected visual acuity (BCVA) was measured indoors before surgery and 1 month after surgery. Straylight values were measured indoors before surgery and 1 and 2 months after surgery using the C-quant straylight meter (Oculus GmbH, Wetzlar, Germany). Results: There were no significant differences between the 2 groups in BCVA at 1 month postoperatively (p = 0.587). Mean straylight values of clear and photochromic IOL groups were 2.76 ± 1.89 log (s) and 2.88 ± 2.04 log (s) preoperatively, 1.39 ± 0.84 log (s) and 1.32 ± 0.26 log (s) at 1 month postoperatively, and 1.43 ± 0.92 log (s) and 1.45 ± 0.50 log (s) at 2 months postoperatively. There were no significant differences between the 2 groups in indoor straylight values (p = 0.778, 0.709, 0.929, before surgery, 1 and 2 months after surgery respectively). Repeated-measure analysis of straylight values also showed no significant difference between the 2 groups (p > 0.05). Conclusions: There were no significant differences in BCVA and straylight values between clear and photochromic IOL groups under a mesopic light condition. Therefore, photochromic IOL could be suitable choice for cataract patients who spend significant time under mesopic conditions. J Korean Ophthalmol Soc 2014;55(2):190-195

다중이용업소 안전관리 개선을 위한 법적 소고 - 24시 무인점포의 화재안전 정책을 중심으로 -

김인혁(Kim, In-Hyuk),여은태(Yeo, Eun-Tae),조영진(Cho, Young-Jin) 한국비교공법학회 2021 공법학연구 Vol.22 No.4

2019년 말부터 시작된 코로나19 팬데믹 사태는 오늘에 이르기까지 다양한 영역에서 우리사회에 혼란과 변화를 가져오고 있다. 특히 감염병은 여러 사람이 이용하는 시설을 중심으로 확산되고 있다는 특징을 지니기에 이를 예방하기 위한 방안 중 하나로 ‘사회적 거리두기’가 범정부적으로 시행되고 있다. 이는 우리사회가 이른바 ‘언택트Untact) 사회’로 급속히 변화되는 계기가 되었으며, 비대면 상거래의 새로운 장을 열었다고도 평가된다. 한편 핀테크(FinTech)와 셀프 서비스 테크놀로지(Self-service technology)의 고도화와 확산에 발맞춰 새로운 소비환경에 따른 밀키트, 아이스크림 전문점, 카페, 편의점, 코인빨래방 등 다양한 종류의 24시간 무인점포들이 생활밀접업종으로서 급속히 증가하고 있다. 이들 업종은 오피스텔, 다세대주택 등 1인 가구가 밀집하고 있는 지역에서부터 아파트 단지에 이르기까지 다양한 형태의 주거환경 속에서 쉽게 찾아볼 수 있다. 그러나 불특정 다수가 이용 가능한 24시 무인점포 등은 화재와 같은 재난으로부터 안전한지 의문이 제기되며, 안전관리의 사각지대에 있지는 않은지 면밀한 검토가 필요하다. 현행 법령에서는 23개 업종만을 다중이용업소의 안전관리 대상으로 규정하고 있기에, 신종 다중이용업소의 등장에 과연 유연하고 실효성 있는 대응이 가능한가를 살펴볼 필요성이 있다. 특히 무인점포와 같은 신종 다중이용업소에 화재 등을 예방하기 위한 소방안전시설을 설치할 수 있는 법적 근거가 충분하지 못하기에, 만약 화재가 발생할 경우 인명피해와 물적피해가 우려된다는 문제점도 제기되고 있다. 불특정 다수인들이 24시간 이용하는 이러한 점포는 소비자의 접근성을 높이기 위해 대부분 저층에 위치하고 있으며, 점포 내에 상주인원이 없어 화재발생 시 가장 중요한 초기대응 그리고 빠른 신고를 기대하기 어려우며, 화재발생시 인근 주변에까지 연소가 확대될 가능성이 매우 높다. 이와 같은 문제의식을 바탕으로, 본고에서는 오늘날 급속하게 증가하고 있는 무인점포의 화재를 예방하기 위한 측면에서 현행 법령상 다중이용업의 법적 정의와 각 개별법상 유사 개념에 대하여 살펴보고자 한다. 더불어 24시 무인점포의 현황 분석을 통해 24시 무인점포의 안전관리상 문제점들등을 살펴보고 이를 개선하기 위한 법제도적 방안을 도출해보고자 한다. The COVID-19 pandemic, which started at the end of 2019, has brought chaos and changes to our society in various fields up to today. In particular, since infectious diseases are spreading mainly in facilities used by many people, “social distancing” is being implemented as one of the measures to prevent it. This became an opportunity for our society to rapidly change into a so-called ‘untact society’, and it is also evaluated that it opened a new chapter in non-face-to-face commerce. Meanwhile, in line with the advancement and spread of FinTech and self-service technology, various types of 24-hour unmanned stores such as meal kits, ice cream shops, cafes, convenience stores, and coin laundries are living in the new consumption environment. As a closely related industry, it is growing rapidly. These industries can be easily found in various types of residential environments, from areas where single-person households are concentrated, such as officetels and multi-family houses, to apartment complexes. However, it is questionable whether unmanned 24 hour stores, etc. that can be used by many unspecified people are safe from disasters such as fire, and it is necessary to carefully examine whether they are in the blind spot of safety management. As the current law stipulates that only 23 industries are subject to safety management of publicly-used establishments, it is necessary to examine whether a flexible and effective response to the emergence of new publicly-used establishments is possible. In particular, there is not enough legal basis to install fire safety facilities to prevent fires in new publicly-used establishments such as unmanned stores. Most of these stores, which are used by unspecified people 24 hours a day, are located on the lower floors to increase the accessibility of consumers. It is very likely to expand. Based on this awareness, in this paper, as a way to consider the problems of fire safety management in unmanned stores, which are rapidly increasing today, the legal definition of publicly-used establishments under the Publicly-Used Establishments Act and the current status and problems of 24-hour unmanned stores are analyzed. We will look into it and try to derive legal and institutional improvements.

빛간섭단층촬영에 따른 당뇨황반부종의 형태학적 분류와 치료 후 임상경과

임종훈,김인혁,배지현,김하경,배소현,Jong Hoon Lim,In Hyuk Kim,Gi Hyun Bae,Ha Kyoung Kim,So Hyun Bae 대한안과학회 2014 대한안과학회지 Vol.55 No.2

Purpose: To analyze the optical coherence tomographic patterns and clinical courses of patients with diabetic macular edema (DME) after treatment. Methods: The charts of 65 patients with DME were retrospectively reviewed. Baseline optical coherence tomographic patterns of DME were categorized into the 4 groups: group 1 (9 eyes, 13.8%) showed diffuse retinal thickening, group 2 (21 eyes, 32.3%) had cystoid macular edema (CME), group 3 (13 eyes, 20.0%) demonstrated serous retinal detachment (SRD) and group 4 (22 eyes, 33.9%) had combined CME and SRD. Treatments for DME included intravitreal bevacizumab/ triamcinolone injection, focal laser photocoagulation and vitrectomy. During 12 months of follow-up, changes in the patterns of DME were assessed. Additionally, the central retinal thickness (CRT) and best-corrected visual acuity (BCVA) were measured at baseline, 6 and 12 months. Results: During 12 months of follow-up, 21 eyes (32.3%) showed changes in the DME pattern: 2 eyes (22.2%) in group 1, 3 (14.3%) in group 2, 4 (30.8%) in group 3 and 12 (54.5%) in group 4. A significantly greater proportion of eyes with changes in DME pattern underwent vitrectomy compared with those without changes in DME pattern (p = 0.012). There was a significant difference in CRT among the 4 groups; group 4 demonstrated the largest CRT at baseline, 6 and 12 months (p < 0.001, 0.002 and 0.029, respectively). However, there were no significant differences in BCVA among the 4 groups at baseline, 6 or 12 months (p = 0.879, 0.375 and 0.246, respectively). Conclusions: Clinical courses varied according to the tomographic patterns of DME after treatment, and the poorest anatomic outcome was found in group 4. Change in tomographic pattern of DME was correlated with the treatment of DME, which might suggest a poorer outcome in those patients than in the patients who maintained their DME patterns. J Korean Ophthalmol Soc 2014;55(2):222-229

슬라이딩 모드 외란 관측기와 제어기를 이용한 DC 모터 전류 제어기 설계

김인혁(In Hyuk Kim),손영익(Young Ik Son) 제어로봇시스템학회 2016 제어·로봇·시스템학회 논문지 Vol.22 No.6

Using a sliding mode controller and observer techniques, this paper presents a robust current controller for a DC motor in the presence of parametric uncertainties. One of the most important issues in the practical application of sliding mode schemes is the chattering phenomenon caused by switching actions. This paper presents a novel sliding mode controller that incorporates an integral control with a sliding mode disturbance observer to attenuate the chattering by reducing the controller/observer switching gains. The proposed sliding mode disturbance observer is designed to estimate a relatively slow varying signal in the equivalent lumped disturbance owing to system uncertainties. Combining the estimated uncertainty with the sliding mode control input, the proposed controller can achieve the control objective by using the relatively low gain of the controller. The proposed disturbance observer does not include the switching control input of the baseline sliding mode controller to reduce the observer switching gain. In the proposed approach, the integral sliding mode control is used to improve the steady state control performance. Comparative computer simulations are carried out to demonstrate the performance of the proposed method. Through the simulation results, the proposed controller realizes the robust performance with reduced current ripples.

재난관리 관점에서 본 유해화학물질 유출사고 예방기능 강화의 필요성과 법적 과제 - 화학물질관리법제의 개선방안을 중심으로 -

김인혁(Kim, In-Hyuk),여은태(Yeo, Eun-Tae),조영진(Cho, Young-Jin) 한국비교공법학회 2021 공법학연구 Vol.22 No.2

오늘날 우리사회가 직면하는 재난의 규모는 점차 대형화되어 가고 있으며, 재난의 진행양상도 복잡해지는 특징을 보이고 있다. 재난을 관리하기 위한 법제도는 재난이 발생하고 난 이후 지속적으로 정비되고 개선되면서 발전하고 있다는 점에서 재난이 발생되기 이전과 이후에 드러난 문제점을 분석하고, 이를 해결하기 위한 법제적 연구가 반드시 필요하다. 재난관리에 있어 모법이라고 할 수 있는 「재난 및 안전관리 기본법」에 따라 재난의 예방․대비․대응․복구를 위한 모든 활동을 재난관리라고 정의하고 있으며, 재난의 유형은 크게 자연재난과 사회재난으로 구분하여 관리되고 있다. 특히 오늘날 재난관리 측면에서 바라보면, 풍수해 등으로 인한 이른바 전통적 재난과는 달리 사회재난의 유형은 날로 다양해지고 있고 이를 관리하기 위한 법령도 점차 강화되고 있다. 이와 같은 측면에서 본고에서는 사회재난의 한 유형인 유해화학물질 유출사고를 예방하기 위한 법적 근거를 분석하기 위해 「화학물질관리법」을 중심으로 하여 재난예방을 목적으로 두고 있는 규정을 살펴보고자 한다. 유해화학물질 유출사고로는 처음으로 특별재난지역이 선포된 바 있는 2012년 구미 휴브글로벌 불산누출 사고로 인해 23명의 인명피해가 발생되었으며, 이는 우리 사회에 화학물질의 위험성과 그 관리의 중요성을 일깨우게 하는 큰 사건 중 하나였다. 이후 「유해화학물질관리법」이 「화학물질관리법」으로 전면개정 되면서, 화학물질로 인한 사고와 재난을 예방하기 위한 법적 근거는 다소 보완되었다고 할 수 있다. 그러나 점차 화학사고에 관한 안전규제 조치가 완화되면서 화학물질로 인한 재해가 다시 빈번히 발생되고 있다는 사실을 통해 「화학물질관리법」에서의 보다 강화되고 실효성 있는 법적 개선방안을 제시함으로써 향후 유해화학물질 사고를 예방하기 위한 입법정책을 모색하는데 기여하고자 한다. The scale of disasters facing our society today is gradually becoming larger, and the progression of disasters is characterized by being complicated. Since the legal system for managing disasters is continuously improved and improved after a disaster, it is necessary to analyze the problems that have been revealed before and after the disaster, and legal research to resolve them. According to the framework act on the management of disasters and safety, all activities for disaster prevention-preparation-response-recovery are defined as disaster management, and the types of disasters are largely divided into natural and social disasters and managed. In particular, from the perspective of disaster management, unlike traditional disasters caused by storms and floods, the types of social disasters are gradually diversifying, and legislations to manage them are also being strengthened. In this respect, this study aims to examine the regulations on disaster prevention, focusing on the chemical substance management act in order to analyze the legal basis for preventing the leakage of hazardous chemical substances, which is a type of social disaster. In 2012, when a special disaster area was declared for the first time as a hazardous chemical leakage accident from the Hube Global plant in Gumi caused 23 casualties, reminding our society of the dangers of chemical substances and the importance of their management. It was one of the major social disasters. Later, as the toxic chemical substances control act was completely revised to the chemical substance management act, the legal basis for preventing accidents and disasters caused by chemical substances was somewhat supplemented. However, with the fact that accidents caused by chemical substances are frequently occurring again as safety regulatory measures for chemical accidents are gradually eased, more strengthened and effective legal improvement measures in the chemical substance control act are proposed to prevent future hazardous chemical accidents. It intends to contribute to the search for a legislative policy to prevent it.

고정밀 거리감지를 위한 라이다 신호처리 반도체 개발

오정대(Jung-Dae Oh),김인혁(In-Hyuk Kim),이희현(Hee-Hyun Lee),우재혁(Jae-Hyuck Woo) 대한전자공학회 2020 대한전자공학회 학술대회 Vol.2020 No.8

In this paper, we propose an integrated signal processing semiconductor that can detect distance with high resolution in LiDAR system. The suggested method is to configure TDC, TIA, and MCU, which function specifically on a single chip. The proposed semiconductor has advantages of high-precision long-distance detection using TDC, acceptability in various photo detectors using TIA, cost savings as integrated into a single semiconductor, and lightening and miniaturizing the module. In addition, it supports error correction, data signal processing and various communication protocols using MCU, which is applicable to various LiDAR systems.

Dowex 21K XLT 수지에 흡착된 금과 구리-시안 착화합물의 탈착에 대한 아세톤의 영향

김인혁 ( In Hyuk Kim ),최종문,전충 ( Choong Jeon ),차주현 ( Ju Hyun Cha ) 한국물환경학회(구 한국수질보전학회) 2014 한국물환경학회·대한상하수도학회 공동 춘계학술발표회 Vol.2014 No.-

다관절 로봇의 타축 반력 저감을 위한 외란 관측기반 제어기 설계

김인혁(In-Hyuk Kim),손영익(Young Ik Son),김필준(Pil-Jun Kim) 대한전기학회 2013 대한전기학회 학술대회 논문집 Vol.2013 No.10

고고도항공기용 외전형 동기전동기의 특성 비교분석

김인혁(In-Hyuk Kim),정민재(Min-Jae Jung),정상용(Sang-Yong Jung) 대한전기학회 2014 대한전기학회 학술대회 논문집 Vol.2014 No.7

외란을 갖는 기계 시스템의 마찰 보상을 위한 적응 제어기 설계

김인혁(In-Hyuk Kim),조경훈(Kyoung-Hun Cho),오정철(Jeong-Cheol Oh),손영익(Young Ik Son),김필준(Pil-Jun Kim) 대한전기학회 2012 정보 및 제어 심포지엄 논문집 Vol.2012 No.10