식물층에서의 편파별 후방 산란 측정과 산란 모델의 비교

홍진영,오이석,Hong Jin-Young,Oh Yi-Sok 한국전자파학회 2006 한국전자파학회논문지 Vol.17 No.9

본 논문은 후방 산란 계수 및 지표면 특성(ground truth)에 대한 측정 방법을 기술하며 후방 산란 계수 측정값과 radiative transfer 이론을 적용하여 개발된 산란 모델을 비교함으로써 산란 모델의 정확성을 검증한다. R 밴드 $(1.7\sim2.0GHz)$의 주파수 대역에서 polarimetric scatterometer 시스템으로 한강생태공원의 수풀 지형에서의 후방 산란 계수를 입사 각도의 변화와 지표면 수분 함유량의 변화에 따라 측정한다. 이 측정 결과를 지표 산란 모델과 비교한 결과 동일 편파의 경우 비교적 잘 일치하며 교차 편파의 경우 보정을 해줌으로써 산란 모델의 정확성을 얻을 수 있다. In this paper, we describe a measurement technique for the backscattering coefficient and ground truth of a vegetation canopy in detail. A simple microwave backscattering model for vegetation canopies is verified by being compared with this measurement. An R-band$(1.7\sim2.0GHz)$ scatterometer system is used to measure the backscattering coefficient of a vegetated area in the Han-river park for various incidence angles and a wide range of the soil moisture contents. It is found that the model agrees quite well with the measurements for co-polarized radar backscatter, and needs a correction for cross polarized radar backscatter.

흰개미 서식처의 미생물 다양성 및 특이성

홍진영,김영희,조창욱,김수지,이정민,정소영,Hong, Jin Young,Kim, Young Hee,Jo, Chang Wook,Kim, Sao Ji,Lee, Jeung Min,Jeong, So Young 국립문화재연구소 2016 保存科學硏究 Vol.37 No.-

We isolated microorganisms from soil arounding the stump and surface of stump in Bubjusa temple in Boeun, Heungguksa temple in Yeosu and Leeyongwoo house in Boseong. As a result, a distribution percentage of bacteria was high and there was a region-specific difference in bacteria colony. There was greater microbial diversity and population in the Leeyongwoo house in Boseong. 국내 목조문화재의 흰개미 피해는 토양과 인접한 건축물의 기둥하부에 주로 발생하지만 흰개미의 유입은 주변 야산의 부후된 목재나 수목 제거 후 남겨진 그루터기에 서식하는 흰개미가 인접한 건물로 유입되어 발생하게 된다. 본 연구는 목조문화재 생물피해 조사에서 흰개미 서식이 확인된 그루터기를 제거하면서 수거된 보은 법주사, 여수 흥국사, 그리고 보성 이용우 가옥의 그루터기와 주변 토양으로부터 미생물을 분리하였다. 그 결과, 세균의 분포 비율이 높았고 지역에 따라 세균 군집에 명확한 차이를 보였으며, 특히 보성 이용우 가옥 내 토양에서 다양한 세균이 다량 분포하는 것으로 나타났다.

상급종합병원 중환자실 간호사의 전문직 삶의 질이 전문직 자아개념에 미치는 영향

홍진영,손수경,Hong, Jin Young,Sohn, Sue Kyung 한국중환자간호학회 2019 중환자간호학회지 Vol.12 No.2

Purpose : The purpose of this study was to identify factors influencing the professional self-concept of nurses working in intensive care units (ICUs). Methods : Data were collected from July 1 to August 15, 2014. The subjects were 206 ICU nurses working in four university hospitals in B and U cities, Korea. Their professional self-concept was measured using Arthur's Scale revised by Yoon (2012), and professional quality of life (QOL) was measured using Pro QOL Korean Ver. 5 developed by Stamm (2010). Data were analyzed with SPSS Ver. 18, using a t-test, ANOVA, Pearson's correlation coefficient, and multiple regression analysis. Results : Professional self-concept was significantly correlated with compassion satisfaction (r=.61, p<.001), and burn out (r=-.57, p<.001). The factors influencing professional self-concept were compassion satisfaction (${\beta}=.46$, p<.001), burn out (${\beta}=-.27$, p<.001), and education level (${\beta}=.14$, p =.014). The explanatory power of this model was 46.5%. Conclusion : The results suggest that the influencing factors found in this study should be considered when planning nursing intervention programs for improving the professional self-concept of ICU nurses.

토양 표면에서의 편파별 후방 산란 계수 측정을 통한 산란 모델과 Inversion 알고리즘의 검증

홍진영,정승건,오이석,Hong, Jin-Young,Jung, Seung-Gun,Oh, Yi-Sok 한국전자파학회 2006 한국전자파학회논문지 Vol.17 No.12

The backscattering coefficients of a bare soil surface were measured using an R-band polarimetric scatterometer, which were used to verify the validities of scattering models and inversion algorithms. The soil moisture contents and the surface roughness parameters (the RMS height and correlation length) were also measured from the soil surface. The backscattering coefficients were obtained from several scattering models with these surface parameters, and the computation results were compared with the measured backscattering coefficients. The soil moisture contents of the surface were retrieved from the measured backscattering coefficients, and compared with the measured surface parameters. This paper shows how well the scattering models agree with the measurements, and also shows the inversion results. 본 논문은 풀이 없는 지표면에서의 후방 산란 계수(backscattering coefficients)를 측정하고, 이 측정 결과를 이용하여 여러 표면 산란 모델들과 inversion 알고리즘의 성능을 비교, 분석하였다. 우선, R-밴드 주파수($1.7{\sim}2.0GHz$)에서 완전 편파 scatterometer를 이용하여 풀 층이 없는 지표면에 대해서 편파별로 후방 산란 계수를 측정하고, 동시에 수분 함유량과 표면 거칠기를 측정하였다. 그런 다음 측정된 지표면 변수들을 표면 산란 모델들에 입력하여 후방 산란 계수를 계산하고, 이 계산 결과를 측정 결과와 비교 분석하였다. 또한, inversion 알고리즘들을 적용하여 측정된 편파별 후방 산란 계수로부터 수분 함유량을 추출하고, 이 추출된 수분 함유량이 현장에서 측정한 수분 함유량과 잘 맞는지 여부를 확인하였다. 표면 산란 모델들 중에서 정확도가 높은 모델들을 제시하였으며, inversion 모델들의 계산 결과도 나타내었다.

유기질 문화재로부터 분리한 곰팡이에 대한 참나무 목초액의 항진균 활성 조사

홍진영,정미화,Hong, Jin-Young,Jung, Mi-Hwa 국립문화재연구소 2009 保存科學硏究 Vol.30 No.-

We have evaluated the antifungal activities of oak vinegar to develop a natural biocide for organic cultural heritage. Fungi used in this study were screened from the cultural heritages, Kyujanggak and JanggyeongPanjeon and tested on organic substrates-degrading ability. In the results, 7 species of fungi have produced the extracellular enzymes to degrade CMC, xylan, lignin. Thus, we have used these seven species fungi to investigate the antifungal activity of oak vinegar in this study. In the result, the antifungal activity of oak vinegar indicated positive potencial. Especially, methylene chloride and ethylacetate fractions of the oak vinegar had high activities at the concentration of 5.0mg/disc. In these fractions, many different kinds of compounds such as phenolic and furfural, etc. were analyzed by GC-MS. The experiments indicated that the development of a biocide using natural extracts can have a potential to conserve of organic cultural heritages.

동산문화재 다량 보관처의 공기 중 부유 미생물 분포 조사

홍진영,서민석,김수지,김영희,조창욱,이정민,Hong, Jin-Young,Seo, Min-Seok,Kim, Soo-Ji,Kim, Young-Hee,Jo, Chang-Wook,Lee, Jeung-Min 국립문화재연구소 2015 保存科學硏究 Vol.36 No.-

동산문화재 보관처는 사찰과 문중 또는 개인 소유자가 관리하므로 전문적이고 체계적인 보존 관리가 부족하며 이로 인해 열악한 보존환경으로 이어질 수 있다. 실내 공기질에 부유하는 먼지와 미생물은 문화재에 생물학적 훼손을 발생시킨다. 본 연구에서는 다양한 동산문화재들이 보관되어 있는 10곳의 수장시설 또는 전시 및 보관시설에 대하여 실내 공기 중 부유 미생물의 분포 상태를 조사하였다. 그 결과, 수집된 미생물의 집락수는 조사 장소에 따라 큰 차이를 나타냈는데, 가장 미생물 오염이 심각했던 보관처는 전남 영암의 D 유물전시관으로 이곳은 모든 조사 지점에서 $2,000C.F.U/m^3$ 이상이 검출되었으며 대부분의 소장처에서는 $166C.F.U/m^3$ 이상의 진균이 부유하고 있는 것으로 확인되었다. 검출된 미생물을 동정한 결과, Aspergillus sp.와 Penicillium sp., Alternaria sp. Cladosporium sp.등이 공통적으로 확인되었으며 Ceriporia lacerata, Ganoderma carnosum, Myrothecium gramineum 와 Bjerkandera sp. 등과 같은 부후균도 동정되었다. 이러한 진균들은 문화재의 원형 손상 등의 문제를 발생시킬 수 있으므로 부유 진균 농도에 대한 권고기준을 제시하고 소장처의 보존환경 관리 시스템을 마련해야할 것으로 판단된다. The temple and family or private owner have managed the storage space of movable cultural properties. Thus they lack the ability to manage professionally and systematically, movable cultural properties are in a poor environment and have been damaged by abundant dust and airborne fungi in the storage. In this study, we investigated microbes distribution in 10 storage or exhibition hall housing the movable cultural properties. As a results, concentration of collected microorganisms exhibited a large difference according to a storage and the D Relic Museum in Yeongam is the most contaminant storage, in which detected $2,000m^3$ or more. More than $166m^3$ of the fungi were detected in most storages of the other. We identified so many varieties of fungi such as Aspergillus sp., Penicillium sp., Alternaria sp. and Cladosporium sp. existing commonly in 10 storages including wood rot fungi such as Ceriporia lacerata, Ganoderma carnosum, Myrothecium gramineum and Bjerkandera sp.. This airborne fungi may damage cultural heritages. The Guideline on a concentration of airborne fungi should be estimated and management system to the preservation environment must be provided.

중환자실 간호사의 임상 적응 경험

홍진영,손수경,Hong, Jin Young,Sohn, Sue Kyung 한국중환자간호학회 2024 중환자간호학회지 Vol.17 No.1

Purpose : This study aimed to explore and describe intensive care unit (ICU) nurses' experience of clinical adaptation. Methods : The participants were 14 ICU nurses with more than two years of working experience in the ICU. Data were collected through in-depth individual interviews conducted between July and October 2021. Theoretical sampling was used to the point of theoretical saturation. Data were analyzed using the Strauss and Corbin method. Results : A total of 79 concepts, 37 subcategories, and 16 categories were identified through open coding. Axial coding based on the paradigm model revealed that the central phenomenon was "The harsh adversity faced in the nursing field where life and death are determined" and the core category was "Enduring the adversity of caring for critically ill patients and achieving self-realization." ICU nurses' clinical adaptation process was explained in five phases: "confrontation period," "turbulent period," "seeking period," "struggling period," and "stabilized period." The five phases that affect interventional conditions were "Support from reliable people," "Recognition of administrative and financial support." Conclusion : This study provided novel insights for a comprehensive understanding of ICU nurses' clinical adaptation processes. Furthermore, the findings are expected to be used as basic data to develop multifaceted strategies to help ICU nurses' adaptation to critical care.

전철용 고분자 장간애자의 실증 시험을 통한 신뢰성 평가

홍진영,김영성,백주흠,박완기 ( J . Y . Hong,Y . S . Kim,J .H . Baek,W . K . Park ) 한국전기전자재료학회 1997 한국전기전자재료학회 추계학술대회논문집 Vol.1997 No.1

Inhibitory Activity of Asarum sieboldii against Wood Rot Fungi on Traditional Paper, Hanji

홍진영,김영희,조창욱,이정민,김수지,정소영,Hong, Jin Young,Kim, Young Hee,Jo, Chang Wook,Lee, Jeong Min,Kim, Su Ji,Jeong, So Young The Korean Society of Medicinal Crop Science 2017 한국약용작물학회지 Vol.25 No.5

Background: To investigate the possibility of using Asarum sieboldii as an environment-friendly fumigant for protecting organic cultural heritages, the inhibitory effect of A. sieboldii extract against wood rot fungi on Hanji was examined. Methods and Results: The physical, optical, and morphological properties of Hanji inoculated with Trametes versicolor and Tyromyces palustris, and exposed to the n-hexane fraction of A. sieboldii extract, were measured. The physical properties were expressed as weight loss, zero-span tensile strength and viscosity and the optical properties were depicted by luminance and chromaticity ($L^*$, $a^*$, and $b^*$). The results showed that, the n-hexane fraction of A. sieboldii extract inhibited the growth of fungi on Hanji, and preserved its condition. At a concentration of 25 mg, the n-hexane fraction of A. sieboldii extract maintained zero-span tensile strength, increased viscosity, and restricted discoloration of Hanji. It also was confirmed that the weight of fungi infested Hanji exposed to the extract did not decrease. Scanning electron microscopic images revealed that the spores and hyphae of T. versicolor and T. palustris were not present on Hanji during treatment with > 25 mg of the n-hexane fraction of A. sieboldii extract. Conclusions: These results indicate that the n-hexane fraction of A. sieboldii extract by virtue of its antifungal effectiveness may help in preserving Korean paper cultural heritages, including Hanji.

임피던스 경계 조건, 모멘트 법과 몬테 카를로 방법을 이용한 논의 산란계수 수치적 계산과 측정 데이터와의 비교

홍진영,오이석,Hong, Jin-Young,Oh, Yi-Sok 한국전자파학회 2007 한국전자파학회논문지 Vol.18 No.7

본 논문은 논에 대한 전파 산란 특성을 측정하고, 수치적 계산 결과와 비교함으로써 벼의 수치적 모델링에 대한 전파 산란 알고리즘을 제시하고자 한다. 임피던스 경계 조건과 dyadic 그린함수로부터 임피던스 표면 위(수면)의 손실 있는 유전체(벼)에 대한 적분 방정식을 유도하였고, 모멘트 법을 이용하여 유전체의 체적 전류를 계산하였다. 또한, 몬테 카를로 방법을 적용하여 입사 각도 및 편파에 따른 후방 산란 계수를 수치적으로 계산하였다. 1.85 GHz의 측정 시스템을 이용하여 논의 후방 산란 계수를 측정하였으며, 본 논문에서 제시한 알고리즘의 계산 결과와 비교, 검증하였다. A numerical algorithm for estimating precise backscattering coefficients of rice fields is proposed and its accuracy is verified in this paper. After a bunch of rice plants above water surface is modeled with a bunch of randomly oriented lossy dielectric bodies above an impedance surface and the equivalent volume currents of the lossy dielectrics are computed using the moment method. Then, the scattered fields of a rice field with many bunches are computed with a Monte Carlo method, and consequently the backscattering coefficient of the rice field is computed for various incidence angles and polarizations. Finally, the backscattering coefficient of a rice field is measured at 1.85 GHz using an R-band scatterometer system, and these experimental data are used to verify the numerical algorithm proposed in this paper. It is found that the numerical computation results agree well with the measurement data.