봉사활동 필요한 곳 미리 알려야

문영민 고려대학교 지방자치법학연구회 2000 지방자치법연구 Vol.1 No.-

수열합성에 의해 제조된 YVO₄:Eu³⁺ 형광체의 발광특성

문영민,최성호,정하균,임상호,Moon, Yong-Min,Choi, Sung-Ho,Jung, Ha-Kyun,Lim, Sang-Ho 한국재료학회 2008 한국재료학회지 Vol.18 No.10

We have synthesized $Eu^{3+}$-doped $YVO_4$ phosphors by using a hydrothermal method and investigated their luminescent properties. Aqueous solutions of $Y_2O_3,\;V_2O_5,\;Eu_2O_3$, and nitric acid with various pH values were used as the precursors. The crystallinity, surface condition, and emission characteristics were examined using XRD, FT-IR, and photo-excited spectrometer. $Eu^{3+}$ incorporation followed by the efficient red emission strongly depends on the acidity of solution media. The emission intensity becomes stronger as the pH values increase to 7 and then gradually decreases. This phenomenon might be related to the hydroxyl quenching effect, which is induced by surface bound OH-groups.

조간대 갯벌에서의 도요·물떼새 서식지수용능력 추정

문영민,김관목,유정칠 한국해양과학기술원 2020 Ocean and Polar Research Vol.42 No.1

Shorebirds migrating along the East Asian-Australasian Flyway (EAAF) have been drastically decreasing due to continuous area loss and quality degradation of intertidal mudflats in the Yellow Sea. Evaluating the current habitat quality by means of habitat carrying capacity estimation could be effective in predicting the magnitude of impacts caused by habitat loss and provide better understanding to improve management strategies. In this study, we estimated the total biomass of Macrophthalmus japonicus, a main prey item of curlews in the Korea peninsular as habitat carrying capacity of the southern intertidal mudflat of Ganghwa Island, one of the key stopover sites for curlews in the EAAF. The result of the estimation took into account spatial differences of prey biomass and the available foraging time by tide patterns. Accordingly, it was found that curlew populations account for 30.26% of the habitat carrying capacity. When we calculated the mean biomass of the area and extrapolated it to the whole area to calculate the total biomass, it was found that the curlews have consumed 10.92% of the total biomass. The results show that the habitat carrying capacity of the southern intertidal mudflat of Ganghwa Island has decreased by 7.8% compared to a study conducted twenty years ago employing the same method. This study shows that there can be considerable differences in the results of habitat carrying capacity estimation between different methods, indicating that various environmental factors that affect the estimation results of habitat carrying capacity must be considered to achieve a more precise analysis and assessment.

Short-Term Topical Antibiotic Treatment in Nasal Cavity Actinomycosis: Case Report and Literature Review

문영민,정수영,임상권,이규만 대한이비인후과학회 2022 대한이비인후과학회지 두경부외과학 Vol.65 No.9

Actinomycosis is a rare acute-to-chronic bacterial infection caused by Actinomyces. A 7-yearoldhealthy girl presented with left-sided nasal obstruction and purulent discharge. She had nospecial medical or trauma history, and the symptoms developed gradually after severe vomitingone month prior to the visit. Nasal endoscopy revealed white-black-colored cheesy materialthat appeared as a foreign body or fungal material in the left nasal cavity. The lesion wascompletely removed endoscopically under local anesthesia. The patient was prescribed only atopical antibiotic ointment without any additional systemic antibiotics. She was diagnosedwith actinomycosis based on histopathological examination after a few days. There was no recurrenceat six months post-procedure. The common treatment for actinomycosis is surgicalremoval and a systemic antibiotic therapy. However, this case was successful with completesurgical removal and only a short-term topical antibiotic ointment therapy. Therefore, thetreatment for actinomycosis should differ based on clinical characteristics and the patient’scondition.

장애인 1인가구의 삶의 선택과 전략 - 시간, 공간, 관계적 측면을 중심으로

문영민,김주옥,김수영 한국사회복지학회 2022 한국사회복지학회 학술대회 자료집 Vol.2022 No.10

Effect of Minimum Segment Width on Gamma Passing Rate Considering MLC Position Error for Volumetric Modulated Arc Therapy

문영민,배상일,최철원,전완,김진영,이만우,노태익 한국물리학회 2019 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.74 No.7

Volumetric modulated arc therapy (VMAT) requires higher multi-leaf collimator (MLC) position accuracy compared with conventional radiotherapy to reduce dose delivery error because various small segments are used to create complex dose distributions in VMAT plans. Despite the many reports on the effect of MLC position error on dosimetric quality assurance (DQA), few have addressed the correlation between the minimum segment width (MSW) and the gamma passing rate considering the MLC position error. We analyzed this correlation for VMAT plans using ArcCheck. VMAT plans with three different MSWs (5, 10, and 15 mm) were created for each of the seven prostate cancer cases using Monaco 5.11. With the introduced systematic errors of +1.0, +0.5, 0.0, --0.5, and --1.0 mm in the MLC leaf bank, the dose distributions were measured using ArcCheck. The planned and measured dose distributions were compared using gamma analysis with the Sun Nuclear Corporation (SNC) Patient software. The average passing rates and standard deviations were 73.4\% $\pm$ 3.8\%, 92.9\% $\pm$ 1.9\%, 96.9\% $\pm$ 1.3\%, 90.9\% $\pm$ 2.9\%, and 72.7\% $\pm$ 6.7\% for MLC position errors of --1.0, --0.5, 0.0, +0.5, and +1.0 mm, respectively. The gamma passing rate was linearly correlated with the MSW, as the R$^2$ value was greater than 0.96 for all MLC position errors, except 0.0 mm. The slope increased with increasing the MLC position error in all directions. For an MLC position error of --1.0 mm, the average differences in the gamma passing rates between MSWs of 10 and 15 mm with respect to an MSW of 5 mm were 3.9\% $\pm$ 4.0\% and 7.6\% $\pm$ 3.3\%, respectively, whereas the values were 8.6\% $\pm$ 6.1\% and 12.9\% $\pm$ 3.3\%, respectively, for an MLC position error of +1.0 mm. A correlation between the DQA results considering the MLC leaf bank errors and the MSW of the VMAT plans was established. The use of higher MSWs in VMAT plans was found to be less affected by the MLC position errors. This indicates that the lower the MSW, the more important the DQA before treatment. This study determines the maximum value of MSW corresponding to which the effect of MLC leaf bank error is minimum, thus providing a guidance for the clinical implementation of VMAT.

장애인 노동자의 건강 생애사 연구

문영민 한국사회복지학회 2023 한국사회복지학 Vol.75 No.3

This study aimed to examine the health of workers with disabilities, which has not been the subject of policy consideration in both the labor and health domains, from the perspective of lifecourse epidemiology. To this end, life histories of seven dworkers with disabilities were collected and analyzed by applying Mandelbaum’s (1973) life history methodology. The results are as follows. First, in the ‘domain’, the participants faced direct barriers in the labor market or healthcare system. This not only worsened their health, but also contributed to disability discrimination and attitudes that they had to deal with their health problems alone. Second, disability discrimination in the labor market, and the establishment of legislation to promote labor market participation for people with disabilities since the 2010s, was a personal and social ‘turning point’ that changed their attitudes towards disability and work. Finally, despite the deterioration of their health, the participants were able to reorganize their life strategies, recover through work, and maintain homeostasis in their lives. Based on the results, it was recommended that the health care system for people with disabilities be effectively reorganized, that the social care system for children with disabilities be expanded, and that specific support be provided for workers with disabilities who suffer both disability and health problems. 2017년 장애인건강권법의 시행 이후 장애인의 건강증진에 대한 사회적 지원체계가 구성되고 있는 상황에서, 본 연구는 그동안 노동과 건강 영역 모두에서 정책적 고려 대상이 되지 않았던 장애인 노동자의 건강을, 생애과정 역학의 관점으로 살펴보는 것을 목표로 하였다. 이를 위해 다양한 장애를 가진 7명의 장애인 노동자의 생애사를 수집하여, Mandelbaum(1973)의 생애사 방법을 적용하여 분석을 진행했다. 연구 결과는 다음과 같다. 첫째, '삶의 영역'에서 참여자들은 노동시장이나 의료체계에서 물리적, 인식적인 직접적인 장벽과 맞닥뜨렸다. 참여자들이 맞닥뜨린 장벽은 직접 건강을 악화시켰을 뿐 아니라, 장애 차별과 건강 문제를 오롯이 혼자 해결해야 한다는 특정한 태도를 만들어냈다. 둘째, 노동시장에서의 장애 차별, 그리고 2010년대 이전 장애인 노동시장 참여를 증진하는 법제의 부재, 2010년대 이후 지원 법제의 수립은 장애인이 장애와 노동에 대한 태도를 변화시키는 개인적, 사회적 ‘전환점’이 되었다. 마지막으로, 노동 과정에서 참여자들의 건강은 악화되었지만, 삶의 전략을 재구성하고 노동을 통해 회복하며 삶의 항상성을 유지하고 ‘적응’해 나갔다. 연구 결과를 토대로 하여 장애인 건강주치의 제도를 실효성 있게 개편할 것, 장애아동을 위한 사회적 돌봄 체계를 확대할 것, 장애와 건강문제를 동시에 경험하는 장애인 노동자를 위한 구체적인 지원책을 마련할 것을 제언하였다.

Chinchilla 달팽이핵에서 Calbindin D-28ka 면역반응세포의 미세구조에 관한 연구

문영민,박영란,정윤영,김종증 朝鮮大學校 附設 醫學硏究所 2008 The Medical Journal of Chosun University Vol.33 No.3

Chinchilla 달팽이핵의 신경표지물질의 하나인 calbindin D-28ka은 칼슘결합단백질의 일종으로 여러 포유동물의 신경계통에 널리 분포하고 있는 것으로 알려지고 있다. Chinchilla 달팽이핵에서 CB에 대한 고도의 특이성을 지닌 단세포군항체를 이용하여 광학 및 전자현미경적 면역화학염색방법을 이용하여 CB양성세포의 분포상과 세포의 형태 및 크기와 CB세포의 미세구조에 대하여 관찰한 결과 다음과 같은 결론을 얻었다. 1. Calbindin D-28ka 양성반응세포는 chinchilla 달팽이핵의 전 분야에서 관찰할 수 있었으나 특히 등쪽달팽이핵에서 더 많이 관찰할 수 있었으며 CB양성세포의 형태는 방추형, 타원형, 이극 및 뭇극형이었고 세포의 크기는 16-30?μm 였다. 2. 수많은 미토콘도리아와 축삭세포체 연접, 미세섬유등을 관찰할 수 있으며 축삭을 둘러싸고 있는 말이집과 calbindin D-28ka 양성반응세포의 침착물과 모세혈관을 관찰할 수 있었고 커다란 핵과 축삭의 주변에 작은 슈반핵과 말이집으로 둘러싸인 가로 단면의 수많은 축삭들을 관찰할 수 있었다. 이상의 결과로 보아 calbindin D-28ka 양성반응세포는 청각기능세포를 보호할 뿐만 아니라 청각기능을 수행하는데 매우 중요한 역할을 하는 것으로 판단된다. A unique class cells, strongly immunopositive for anti-calbindin D-28ka were observed in and near the cochlear nucleus of the chinchilla (chinchilla laniger). They were preferentially located in the dorsal cochlear nucleus, as well as in the adjacent superior olivary nucleus. The calbindin D-28ka positive neurons had relatively large cell bodies with thick, heavy spinal dendrites, and were typically situated in the immediate subpial position. The calbindin D-28ka immunoreactive neurons were very varied morphologically; bitufted, bipolar, multipolar and horizontal cells in shape, and the diameters of the neurons are 16-30 μm have been described in the cochlear nucleus of the chinchilla. Also, the calbindin D-28ka positive dendrites were considerably more densely arrayed than those of other cochlear nuclear cells, including the cartwheel cells of the dorsal cochlear nucleus. The fine structure of the cells in the cochlear nucleus in the chinchilla(chinchilla laniger) was studied by transmission electron microscopy. The neurons had a large, round, centrally located nucleus, and their cytoplasm contained numerous mitochondria, myelinated axon, dense granular endoplasmic reticulum, abundant Golgi apparatus, groups of free ribosomes, some heterogeneous particles and neurofilaments. Cell surfaces were studied irregularly with small spinous processes, and they contained a few fine irregularly arranged neurofilaments and some granular endoplasmic reticulum. Boutons contacting the soma and dendrites of the cochlear nucleus neurons were defined as the axosomatic synapses. Based on differences in the bouton and vesicle morphology, the four synaptic bouton types were identified; 1. Asymmetrical and symmetrical synapses with small rounded vesicles. 2. Asymmerical synapses with pleomorphic admixture contained predominantly spherical vesicles. 3. Symmerical synapses with pleomorphic vesicles of flattened, spherical and dense-core vesicles. 4. Asymmetrical as well as symmetrical synapses with heterogeneous and large dense-core vesicles. Synaptic boutons containing the rounded vesicles and the large densecore vesicles were most frequently observed.

Reference Dosimetry and Calibration of Glass Dosimeters for Cs-137 Gamma-rays

문영민,이동주,김정기,강영록,이만우,임희진,정동혁,Moon, Young Min,Rhee, Dong Joo,Kim, Jung Ki,Kang, Yeong-Rok,Lee, Man Woo,Lim, Heuijin,Jeong, Dong Hyeok Korean Society of Medical Physics 2013 의학물리 Vol.24 No.3

본 연구에서는 방사선생물 분야에서는 사용하는 세슘-137 조사기에 대한 기준 흡수선량을 측정하고 시료의 방사선량 평가에 활용하기 위하여 유리선량계를 교정하였다. 세슘-137 감마선에 대하여 IAEA TRS-277 프로토콜을 적용하여 정밀하게 물흡수선량을 결정하였다. 기준 흡수선량 측정에는 PTW-TM300013 전리함과 PTW-TM41023 물팬텀을 사용하였으며, 유리선량계는 DoseAce사의 GD-302M 모델을 사용하였다. 교정된 유리선량계의 불확도(1 SD)는 약 2.7%로 평가되며, 본 결과는 연구용 시료의 방사선량 측정에 이용될 예정이다. In this research, the glass dosimeter was calibrated to measure the standard absorbed dose of the Cs-137 irradiator and absorbed dose in a biological sample. Absorbed dose in water for Cs-137 gamma ray was determined by the IAEA TRS-277 protocol. The PTW-TM30013 ion chamber and the PTW-TM41023 water phantom were utilized for measuring absorbed dose and the value was compared with the reading from DoseAce GD-302M glass dosimeter from Asahi Techno Glass Corporation for its calibration. The uncertainty of measurement ($1{\sigma}$) of the calibrated glass dosimeter was 2.7% and this result would be applied to improve the accuracy in measurement of absorbed dose in a biological sample.

Effective Dose Measurement for Cone Beam Computed Tomography Using Glass Dosimeter

문영민,김효진,곽동원,강영록,이만우,노태익,김정기,정동혁 한국원자력학회 2014 Nuclear Engineering and Technology Vol.46 No.2

During image-guided radiation therapy, the patient is exposed to unwanted radiation from imaging devices built into themedical LINAC. In the present study, the effective dose delivered to a patient from a cone beam computed tomography(CBCT) machine was measured. Absorbed doses in specific organs listed in ICRP Publication 103 were measured with glassdosimeters calibrated with kilovolt (kV) X-rays using a whole body physical phantom for typical radiotherapy sites, includingthe head and neck, chest, and pelvis. The effective dose per scan for the head and neck, chest, and pelvis were 3.37±0.29,7.36±0.33, and 4.09±0.29 mSv, respectively. The results highlight the importance of the compensation of treatment dose bymanaging imaging dose.