유전체 덮개층 효과를이용한 이동통신용 마이크로스트립 안테나의 개발에 관한 연구

이홍민 경기대학교 부설 산업기술종합연구소 1997 산업기술종합연구소 논문집 Vol.13 No.-

In land mobile communications, incident waves to mobile antenna come mostly from directions having low elevation angles about 30。 up from the horizontal plane. In order to receive this waves effectively, planar type antenna was fabricated and its characteristics were analyzed. This type of antenna is achieved using superstrate effect criteria which are derived for a nonzero radiation field extending down to the substrate layer surface plane. A small planar type microstrip antenna which can receive incident waves having low elevation angle was fabricated. Experimental results show that the band width of the fabricated antenna is 70 MHz at 1.2 GHz and has nonzero radiation filed down to the layer surface.

변위기여도 및 변형에너지밀도를 활용한 초고층 건물의 센싱 부재 선정

이홍민,박성우,박효선,Lee, Hong-Min,Park, Sung-Woo,Park, Hyo-Seon 한국전산구조공학회 2009 한국전산구조공학회논문집 Vol.22 No.4

초고층 건물의 안전성 및 사용성을 합리적으로 확보하고 유지하기 위해서 부재의 구조 반응 모니터링은 필요하다. 이러한 대형 건물의 건전도 모니터링은 최근 들어 많은 연구자들에 의해서 관심 되어지고 있지만 건물 특성상 계측 대상 부재가 많고 하중과 구조반응의 관계가 복잡하기 때문에 센싱 부재 선정의 어려움으로 그 적용에 한계가 있다. 본 논문에서는 부재의 변위기여도 및 변형에너지밀도를 기반으로 초고층 건물의 안전성 모니터링을 위한 구조반응 계측 부재 선정에 대한 연구를 수행하였다. To rationally secure and maintain the safety and serviceability of a high-rise building, monitoring of structural responses of members is necessary. As such health monitoring of large-scale building structures has received growing attention by researchers in recent years. However, due to a very large number of members complexity of structural responses of a high-rise building structure, practical difficulties exist in selection of structural members to be sensored for assessment of structural safety of a structure. In this paper, a selection technique for active members for safety monitoring of a high-rise building based on displacement participation factor and strain energy density of a member is investigated.

족삼리(足三里) 경혈배합(經穴配合)에 따른 SHR의 뇌줄기, 소뇌(小腦) 영역(領域)에서 NADPH-diaphorase와 nNOS, 신경세포(神經細胞)의 변화연구(變化硏究)

이홍민,김창환,김용석,Lee, Hong-min,Kim, Chang-hwan,Kim, Yong-suk 대한침구의학회 2003 대한침구의학회지 Vol.20 No.6

Objective: This study examines the effects of acupoint combination on NADPH-diaphorase and neuronal nitric oxide synthase(nNOS) in the brainstem of spontaneously hypertensive rats. Methods: The changes of NADPH-d-positive neurons using a histochemical method and the changes of nNOS-positive neurons using an immunohistochemical method were evaluated. The optical densities of NADPH-d-positive neurons and nNOS-positive neurons of the Choksamni(ST36) Umnungchon(SP9) groups were significantly increased in all brainstem areas as compared to the Choksamni and Choksamni Kokchi(LI11) groups and decreased, with the exeption of the nNOS-positive neurons in the superficial gray of superior colliculus, as compared to the normal group. Results: Our results demonstrated that electroacupuncture changes the activity in the NO system in the brainstem of SHR and the acupoint combination is one of the important parameters for this effect.

足三里 經穴配合에 따른 SHR의 뇌줄기, 小腦 領域에서 NADPH-diaphorase와 nNOS 神經細胞의 變化硏究

이홍민,김창환,김용석 대한침구의학회 2003 대한침구의학회지 Vol.20 No.1

The Effect of Acupuncture in Promoting Neurogenesis and Angiogenesis after Middle Cerebral Artery Occlusion in Rats

이홍민,남상수,김용석 대한침구의학회 2013 대한침구의학회지 Vol.32 No.3

Objectives : This study was performed to choose more effective neuro-protective acupuncture point and to verify the effect of acupuncture in promoting neurogenesis and angiogenesis as a result of its neuro-vasculo-regenerative effect in middle cerebral artery occlusion model in rats. Methods : By TTc staining we chose the most effective acupuncture point with neuro-protection. We randomly divided into four groups: Such as (1) sham group(with sham-operation), (2) sham+acupuncture group(with sham-operation), (3) middle cerebral artery occlusion group, (4) MCAO+AT group. Acupuncture procedure was performed for four days. Total RNA was extracted using TRIzol reagent, according to the manufacturer’s instructions, and was purified using an RNAeasy mini kit. Immuno-histochemistry was performed using primary antibody mouse anti-BrdU, NeuN, Dcx, and VEGF. Results : We found that ST36 had the more neuroprotective effect than LI11 and SP3. The microarray analysis revealed that 54 genes were more expressed neurogenesis pathway in MCAO+AT group compared with MCAO group(fold changes greater than or equal to twofold change). 11 genes were more expressed angiogenesis pathway. And 7 genes were more expressed VEGF pathway. Immuno-histochemistry revealed that cell proliferation, cell migration and cell maturation were increased. Conclusions : This study demonstrated that acupuncture on ST36 had neuro-protective and neuro-restorative effect in ischemic brain injuries. And its mechanism might be related to promote neurogenesis and angiogenesis. These results suggest that acupuncture have potential benefits for the treatment of ischemic stroke.

특수체육교사의 교수법 개선에 있어 전문적사회화 시기의 영향

이홍민 서원대학교 사범대학 부설 교육연구소 2023 교육발전 Vol.42 No.3

The purpose of the current study was to analyze the influence of teacher socialization of adapted physical education teachers. The participants of the study consisted of three adapted physical education teachers who had more than fifteen years of teaching experiences. The data was collected from in-depth interviews and documents related to various experiences. The current study used domain analysis and taxonomic analysis. The followings are results of the study from analyzing data: (1) teaching methods for different types of disabilities were helpful to teach students with disabilities, (2) it is critical to learn effective teaching methods for different classroom environments, and (3) student teaching was helpful to develop effective teaching and volunteer experiences motivated the participants to be a teacher. 본 연구의 목적은 특수체육교사의 교사사회화 과정에 있어 전문적사회화 시기의 영향에 대해 심층적으로 탐색하는 데 있다. 특수체육교사의 교사 사회화 과정을 탐색하기 위하여 15년 이상의 경력을 지닌 3명의 특수체육교사를 연구 참여자로 선정하였다. 경력 특수체육 교사들의 내러티브(narrative) 연구 수행을 위하여 심층면담과 문서 수집이 이루어졌으며 자료의 분석을 위하여 영역분석(domain analysis)와 분류분석(taxonomic analysis)을 사용하였다. 본 연구에서 자료 분석을 통한 결론은 다음과 같다. 첫째, 다양한 장애 유형에 따른 지도 방법론 수업이 수업 진행 시 도움이 되었다. 둘째, 다양한 교실 환경에서 적용 가능한 교수 방법론 수업이 중요하다. 셋째, 교생실습을 통하여 효과적인 교수법 개선에 도움이 되었으며 자원봉사 활동은 교직에 대한 동기부여를 위하여 중요하다.

다층 유전체 효과를 이용한 마이크로스트립 안테나에 관한 연구 ( A Study of the Microstrip Antenna Using Multisuperstrate Layer Effect )

이홍민,이승엽,이영훈,박한규 대한전자공학회 1990 대한전자공학회 학술대회 Vol.1990 No.5

업무상 재해의 요건과 인과관계의 증명책임

이홍민 조선대학교 법학연구원 2022 法學論叢 Vol.29 No.2

대법원ﾠ2021. 9. 9.ﾠ선고ﾠ2017두45933ﾠ전원합의체 판결에 대해서는 아쉬움이 많다. 우선 법제사법위원회의 체계·자구심사보고서에는 산업재해보상보험법 제37조 제1항을 현재의 규정과 같이 정한 이유에 대해 분명히 업무와 재해 사이에 상당인과관계가 없는 것을 공단이 증명하는 것으로 기재하고 있고, 이러한 심사보고서는 법제사법위원회와 소관위원회인 환경노동위원회는 물론 국회 본회의에 제출되었음에도 불구하고 그에 대한 논의가 이루어지지 않은 것에 불과하다. ‘입법자의 의사’에서 입법자란 ‘전체로서의 국회’를 의미한다는 점을 고려할 때에, 비록 입법 과정 전체 중 일부에 표현된 것이라고 해도, 그에 대한 이견 없이 그 내용이 법안에 반영되어 국회의 의결을 거쳤다면, 그러한 내용은 입법자의 의사 내지 입법의도로 인정되어야 할 것이다. 다음으로, 이 사건 판결은 ‘업무관련성’과 ‘상당인과관계’를 업무상 재해의 요건 사실로 파악하는 것으로 보이는데, 이에 관한 논의는 거의 이루어지지 않고 있다. 그런데 현행 법상 ‘출퇴근 재해’가 업무상 재해의 하나로 추가된 이상 업무관련성으로 이러한 내용을 모두 포섭하기는 어렵다. 따라서 업무상 재해로 인정되기 위한 요건은 ① 근로자가 부상·질병 또는 장해가 발생하거나 사망할 것, ② 산재보험법 제37조 제1항 각호의 사실이 존재할 것, ③ ①과 ②의 요건 사이에 상당인과관계가 존재할 것, 이렇게 3가지라고 하면 그것으로 필요·충분하며, 증명책임의 분배에 관한 법률요건분류설에 따를 때, 이 중 근로자 측은 ①과 ②에 해당하는 내용을 증명해야 하며, 그 경우 공단 측에서 ③의 요건의 부재를 증명하지 못하면 업무상 재해로 인정해야 한다고 보는 것이 규정의 표현에 맞는 해석이라고 할 것이다.

Simultaneous Determination of Vitamin A and E in Infant Formula by HPLC with Photodiode Array Detection

이홍민,곽병만,안장혁,정승환,심성례,김경수,윤태형,임동길,정재영 한국축산식품학회 2011 한국축산식품학회지 Vol.31 No.2

The objective of this study was to develop a method to simultaneously quantify vitamins A and E in infant formula. To determine the vitamin A and E content, vitamin A and four different vitamin E isomers (α-, β-, γ-, and δ-tocopherol) were separated by high performance liquid chromatography with a photodiode array detector using a Develosil RPAQUEOUS RP-C_30 column (4.6×250 mm, 5 μm). The vitamin A and E contents in the certified reference material determined using this method were within the certified range of standard values. The limits of detection (LODs) and limits of quantitation (LOQs)for vitamin A were 0.02 and 0.06 μg/L, respectively. LODs and LOQs for the vitamin E isomers ranged from 0.20 to 0.55and from 0.67 to 1.81 μg/L, respectively. Linear analyses indicated that the square of the correlation coefficient for the vitamin A and E isomers was 0.9997–0.9999. The recovery of vitamins ranged from 96.69 to 97.79%. The results demonstrate that this novel method could be used to reliably analyze vitamin A and E content in infant formula.

노화(老化)의 연구동향(硏究動向)에 관한 고찰(考察)

이홍민,서정철,김용석,Lee, Hong-Min,Seo, Jung-Chul,Kim, Yong-Suk 대한침구의학회 2001 대한침구의학회지 Vol.18 No.1

Objectrve : To research the trends of the study related to aging process, and to establish the direction of the study on aging process. Method : We reviewed the journal and essay about the aging process which are published as well in Korea as in foreign country. Results : 1. The study on the Oriental Medicine field can be classfied with the fourth. first, the study of single herb medication's effect on the aging process. second, the study of multiple herb medication's effect on the aging process. third, the study of herb-acupuncture solution's effect on the aging process. fourth, journal review. We find the fact that the study on the Oriental Medicine is concerned with pathology of deficiency syndrome of the kidneys, retention of phlegm and fluid, blood stasis. 2. On the Western Medicine field, mechanism and pathology of aging pracess primarily has been studied. The mechanism of aging process is classified with 'Wear and tear theory' and 'Genome-based theory'. Among the mechanism of aging process, 'Free radical theory' is the most important. Additionally 'Senescence-Accelerated Mouse' has been studied. 3. We review the journal published in foreign country and its subject was the following: first, moxibustion combined with acu-area skin allograft therapy for the aging was effective, second, the traditional chinese medicine bu-zhong-yi-qi-tang in mice have anti-aging effect. third, the overview Preventive geriatrics of Traditional chinese medicine. 4. We researched anti-aging effect study in the journal of the Korean Acupuncture and Moxibustion, and we found a few journal of Herb-acupuncture solution's anti-aging effect. Hereafter, it is necessory that we will study about relationship between acupuncture-moxibustion therpy and anti-aging effect using Senescence-Accelerated Mouse.