SAR 영상을 활용한 지반침하의 위험평가를 위한 지표결정에 대한 연구

이효진,윤홍식,한학,Lee, Hyojin,Yoon, Hongsic,Han, Hak 한국지반환경공학회 2021 한국지반환경공학회논문집 Vol.22 No.7

2015년 4월 개통한 호남고속철도 근처 노반의 침하 문제가 지속적으로 제기되고 있으며 이에 따라 호남고속철도 인근지역의 지반 안정성 또한 문제가 있을 수 있다. 위험지도를 제작하는데 있어서 지표 및 지표를 결정하는 인자를 선정하는 것은 매우 중요하다. 기존의 위험지표는 관측된 기간 중 가장 마지막 관측날을 기준으로한 최종 변위량으로 산정하는데 침하 원인과 지표의 거동을 분석하기 위해서는 시계열적인 지표변위를 확인해야한다. 또한 광범위한 지역의 경우 직접 수준측량을 실시하기에 경제적으로 비효율적이므로 SAR 영상을 이용해 지표변위를 관측하고자 하였다. 본 논문에서는 PS-InSAR기법을 이용해 시계열 지표변위를 관측하였으며 위험지표를 결정하기 위한 인자로 최종지표변위량, 누적지표변위량, 최소변위량과 최대변위량의 차를 이용해 각 인자로 위험도를 등급화하여 비교하였다. 그 결과 최종변위량의 위험도 등급과 각 인자 간 위험도 등급이 상이하였으며 위험지표를 결정하는데 있어 다양한 관점의 인자를 추가하는 것을 제안하였다. 이는 지반침하의 원인을 찾고 해결방안을 모색하는데 있어 중요한 연구가 될 것으로 기대한다. The problem of subsidence of the roadbed near the Honam High Speed Railway, which opened in April 2015, continues to be raised, and the ground stability of the area near the Honam High Speed Railway may also be problematic. It is very important to select the factors that determine the indicators and indicators in producing the risk maps. Existing risk indicators are calculated as the final displacement volume based on the last observed date of the observed period, and time-series indicator displacement must be identified to analyze the cause of subsidence and the behavior of the indicator. Furthermore, for a wide range of regions, it is economically inefficient to conduct direct level measurements, so we wanted to observe surface displacement using SAR images. In this paper, time series indicator displacement was observed using PS-InSAR techniques, and risk was compared by rating each factor using the difference between final indicator displacement, cumulative indicator displacement, minimum displacement and maximum displacement as factors for determining risk indicators. As a result, the risk rating of the final displacement is different from that of each factor, and we propose adding factors from different perspectives in determining risk indicators. It is expected to be an important study in finding the cause of ground subsidence and finding solutions.

면 편성물의 방염처리에 의한 쾌적성 변화

이효진,지주원,Lee Hyo-Jin,Jee Ju-Won 한국섬유공학회 2006 한국섬유공학회지 Vol.43 No.2

In this study, the effect of fixation methods, relaxation treatment and washing treatment on the comfortable properties of MDPPA/HMM treated cotton weft-knitted fabrics was studied. As a result, 1) Air permeability of knitted fabrics decreased after flame resistant treatment. Single jersey and 10G showed higher value of air permeability than those of interlock and 14G. Swelling agent and wet fixation method which increased the values of W/T and decreased the values of WC/W resulted in decreased values of air permeability. 2) $Q_{max}$ of knitted fabrics decreased after washing treatment. $Q_{max}$ of knitted fabrics increased with decreasing air permeability 14G showed higher value of $Q_{max}$ than those of 10G. 3) Water absorption of knitted fabrics increased after relaxation treatment. Water absorption of knitted fabrics increased with increasing the value of W/T. Water absorption of knitted fabrics is more affected by the structure of fabrics rather than the effect of treatment.

대나무 편성물의 황토염색 후 쾌적성의 변화

이효진,지주원,Lee, Hyo-Jin,Jee, Ju-Won 한국섬유공학회 2008 한국섬유공학회지 Vol.45 No.4

In this study, the comfort properties of bamboo knitted fabrics were evaluated and compared with those of cotton and bamboo-cotton blend knitted fabrics before and after loess dyeing. As a result, it was found that appearance density, air permeability, coefficient of thermal conductivity, and deodorization rate of bamboo knitted fabrics were greater than those of cotton knitted fabrics. After loess dyeing, W/T values of knitted fabrics increased due to adhesion of loess to the surface of fiber and pore filling. WC/W value of all knitted fabrics decreased representing that fabric become harder and less fullness. After loess dyeing, air permeability, warmth retaining property, and water absorption capacity of knitted fabrics were decreased and deodorization of knitted fabrics was improved. Overall, bamboo-cotton blends are good alternative for well-being textiles because they have the advantages of both cotton and bamboo fabrics.

고속충돌노즐을 이용한 분류층 가스화기내의 유동특성에 관한 연구

이효진,박태준,이재구,김재호,안달홍,Lee, Hyo-Jin,Park, Tae-Jun,Lee, Jae-Gu,Kim, Jae-Ho,An, Dal-Hong 대한기계학회 1996 大韓機械學會論文集B Vol.20 No.5

An entrained flow gasifier simulating the cold mode was tested to estimate its performance for coal gasification and flow characteristics with a developed high speed impinging jet nozzle. The burner was designed for high temperature and high pressure(HTHP) conditions, especially for IGCC(Integrated Coal Gasification Combined Cycle). In order to get proper size of droplets for high viscous liquid such as coal slurry, atomization was achieved by impacting slurry with high speed (over 150m/sec) secondary gas (oxygen/or air)/ Formed water droplets were ranged between 100.mu.m to 20.mu.m in their sizes. The flow characteristics in the gasifier was well understood in mixing between fuel and oxidizer. Both external and internal recirculation zones were closely investigated through experimentation with visualization and numerical solutions from FLUENT CODE.

Amisulpride의 지속 투여가 생쥐의 성별에 따른 체중 및 대사에 미치는 영향

이효진,신윤오,전병화,박룡진,김정란,Lee, Hyo-Jin,Shin, Yun-O,Jeon, Byeong-Wha,Piao, LongZhen,Kim, Jeong-Lan 대한생물정신의학회 2008 생물정신의학 Vol.15 No.2

Objectives : This study was conducted to examine the effects on food intake, body weight, and metabolic parameters by amisulpride administration in male and female mice, comparing the effects of risperidone and vehicle administration. Methods : Female and male C57BL/6 mice were grouped into low dose amisulpride(1.5mg/kg), high dose amisulpride(15mg/kg), risperidone(0.1mg/kg) and vehicle. Drugs were administered once daily through intraperitoneal injection over 21days. Body weight was measured weekly and food intake was measured daily. Levels of triglyceride, glucose, insulin and prolactin were determined at the end of experiment(on day 22). Results : In the female mice, low and high dose amisulpride as well as risperidone caused significant weight gains. But weight gains in amisulpride groups were numerically smaller than that of risperidone group. In male mice, only high dose amisulpride caused significant weight gain. Among weight gain groups, only weight gain of male mice with high dose amisulpride was significantly associated with increased food intake. Weight gain group in female mice did not show significant correlation with food intake. In male mice, both amisulpride groups showed significantly high plasma insulin levels compared to vehicle. In female and male mice, low and high dose amiulpride groups showed significant high plasma prolactin levels compared to vehicle. Triglyceride level were not significantly changed in all groups. Glucose level was changed significantly only in male risperidone group. Conclusions : Administration of amisulpride caused more significant weight gains in female and male mice than controls but changes of metabolic parameters were different according to sex of mice. Our results suggest that different mechanisms of amisulpiride are likely to affect weight gain between male and female mice. 목 적 이 연구는 수컷과 암컷 생쥐에서 amisulpride를 투여하였을 때 먹이 섭취량, 체중 및 대사 지표에 대한 영향을 risperidone 및 정상 대조군과 비교하여 알아보고자 하였다. 방 법 수컷과 암컷 C57BL/6형 생쥐를 저용량 amisulpride 투여군(1.5mg/kg), 고용량 amisulpride투여군(15mg/kg), risperidone 투여군(0.1mg/kg)과 Vehicle군으로 나누었다. 약물은 21일간 매일 하루에 한 번 복강 주사를 통해 투여되었다. 체중은 일주일에 한 번씩 측정하였으며 먹이 섭취량은 매일 측정하였다. Triglyceride(TG), glucose, insulin 그리고 prolactin은 실험 종료 시에 측정하였다(실험 22일). 결 과 암컷 생쥐의 경우, 저용량과 고용량의 amisulpride 투여군에서는 유의한 체중 증가를 보였으며, risperidone 역시 유의한 체중 증가를 보였다. 그러나, 두 amisulpride군의 증가량은 risperidone군의 증가량에 비해 수치적으로 작았다. 수컷 생쥐의 경우, 고용량의 amisulpride만이 유의한 체중 증가를 가져왔다. 체중 증가를 보였던 집단 중에서, 고용량의 amisulpride를 투여하였던 수컷 생쥐만이 유의하게 증가된 먹이 섭취량과 연관성이 있었다. 암컷 생쥐에서 체중 증가를 보였던 군들은 먹이 섭취량과 유의한 상관성을 보이지 않았다. 수컷 생쥐에서, 두 개의 amisulpride 투여군 모두는 vehicle에 비해 유의하게 높은 혈장 insulin 수치를 보였다. 암컷과 수컷 생쥐에서, 저용량과 고용량의 amisulpride 투여군은 vehicle과 비교하여 유의하게 높은 혈장 prolactin수치를 보였다. Triglyceride는 모든 집단에서 유의하게 변화하지 않았으며 glucose는 수컷 risperidone 투여군에서만 유의하게 변화하였다. 결 론 Amisulpride는 암수 생쥐에서 체중 증가를 일으키지만, 대사 이상에 대한 결과는 성별에 따라 차이가 있었다. 본 연구의 결과는 amisulpride에 의한 체중 증가에 암수 생쥐에서 서로 다른 기전이 작용할 가능성을 시사한다.

장.노년기 성인 음성의 성별과 연령에 따른 음향음성학적 특성 비교

이효진,김수진,Lee, Hyo-Jin,Kim, Soo-Jin 대한음성학회 2006 말소리 Vol.60 No.-

This study focused on comparing the following acoustic changes according to age and sex in adulthood: Fo, Jitter, Shimmer, and NHR. One hundred twenty Korean adults were divided into three age groups (20's, 50's, and 70's) and two sex groups (male and female). The subjects of this study performed three tasks: (1) sustained three vowels; (2) read on paragraph of 'Taking a Walk' (3) explained a picture. The data was analyzed using the MDVP of Multi-Speech. In the parameter of Fo, sex and age were influential factors. In the parameters of Jitter, Shimmer and NHR, the effect of sex and age was different in all three parameters. When the groups organized by sex were analyzed by age, the 20's group showed a statistical difference in all four parameters (Fo, Jitter, Shimmer, and NKR), when compared to the other two age ranges of 50's and 70's. We need to consider our standard parameter for the normal voice in the Korean elderly because the 50's and 70's age normal groups in our study are out of the current range of normal in MDVP.

대나무 편성물의 물성변화

이효진,지주원,Lee, Hyo-Jin,Jee, Ju-Won 한국섬유공학회 2007 한국섬유공학회지 Vol.44 No.4

Bamboo fabrics, which are made by a echo-friendly fiber, have the following properties: lightweight, good weathering ability, good design and manufacture flexibility and medium strength. Dyeing using loess, a major kind of mineral natural dye is good for human body, protects environment and is able to produce beautiful natural colors. In this article, the changes of mechanical properties of bamboo knitted fabric after loess dyeing were evaluated and compared with those of cotton knitted fabric and cotton/bamboo blended knitted fabric. Experiment is conducted as follows; 1) preparing 3 kinds of knitted fabrics, 2) 3 kinds of knitted fabrics were loess dyed 8 times, 3) measuring and comparing the mechanical properties of knitted fabrics before and after dyeing. As a results, bamboo knitted fabrics were more flexible than cotton knitted fabrics. After loess dyeing, stiffness and toughness properties of knitted fabrics further increased. Cotton knitted fabrics showed higher value of KOSHI than bamboo knitted fabrics. Cotton knitted fabrics showed lower value of NUMERI, FUKURAMI than bamboo knitted fabrics. Bamboo-cotton blend is a good alternative for well-being textile because it has the advantages of both cotton and bamboo fabrics.

대나무 산림토양으로부터 수집한 Streptomyces 속 방선균의 계통학적 다양성

이효진,황경숙,Lee, Hyo-Jin,Whang, Kyung-Sook 한국미생물학회 2010 미생물학회지 Vol.46 No.3

국내 자생하는 왕대, 분죽, 조릿대, 호마죽과 같은 다양한 대나무 산림토양의 낙엽층, 부식층, 근권토양 내 방선균 밀도 측정 결과, $2.7{\times}10^6-2.7{\times}10^8$ CFU/g로 계수되었으며, 특히 조릿대 낙엽층 내에는 $2.7{\times}10^8$ CFU/g의 매우 높은 밀도로 분포하였다. 본 연구에서는 대나무림 낙엽층으로부터 100균주, 부식층으로부터 70균주 그리고 근권토양으로부터 160균주로 총 330균주의 방선균을 수집하였다. 이들 분리된 균주들의 기균사, 기중균사 및 색소형성 등을 관찰한 결과 36개 방선균 군집으로 분류되었다. 각 그룹으로부터 대표 방선균 50균주를 선발하여 16S rRNA 유전자 염기서열을 해석하고 계통학적 위치를 검토한 결과, 94%가 Streptomyces 속에 속하였으며, cluster I (2균주), II (35균주), III (6균주), 그리고 IV (7균주)에 속하는 특징을 나타내었다. 대나무 산림토양으로부터 수집된 Streptomyces 속 방선균 50균주를 Shannon-Wiener법에 의해 다양성 지수를 산출한 결과, 대나무림 낙엽층으로부터 수집된 방선균의 다양도는 3.33으로 부식층과 근권토양 보다 높게 나타났으며, 근권토양으로부터 수집된 방선균의 88%가 cluster II에 속하는 특징을 나타내었다. 본 연구에서 수집한 방선균을 Botrytis cinerea, Xanthomonas campestris 그리고 Xanthomonas axonopodis pv. vesicatoria에 대해 항균활성능을 검토한 결과, 각 74균주, 16균주, 25균주 그리고 24균주가 항균활성능을 나타내었다. To investigate a quantitative evaluation of the actinobacteria, we have collected samples from various kinds of bamboo forest soil. Each different layers contained $2.7{\times}10^6-2.7{\times}10^8$ CFU/g of actinobacteria which was the highest in litter layers of Sasa boreali forest soil. We obtained 330 actinobacteria from different layers of bamboo forest soil; litter (100 strains), humus (70 strains), and rhizosphere soil (160 strains). Based on the colony morphology (aerial mycelium, substrate mycelium, and soluble pigment), isolates were divided into thirty-six groups and we selected 50 representative isolates. 16S rRNA gene sequence analysis showed Streptomyces was major actinobacteria (94%) and they were categorized as cluster I (2 strains), II (35 strains), III (6 strains), and IV (7 strains), respectively. The diversity index of 50 Streptomyces collected from the bamboo forest soil was calculated with the Shannon-Wiener method. Bamboo litter showed higher diversity index level of 3.33 than that of humus and rhizosphere soil. Also, antibiotic activities of our isolates were investigated against Botrytis cinerea, Xanthomonas campestris, Xanthomonas axonopodis pv. vesicatoria, and Bacillus cereus and found in 74, 16, 25, and 24 strains, respectively.

Development and evaluation of a competitive enzyme-linked immunosorbent assay using a monoclonal antibody for diagnosis of severe fever with thrombocytopenia syndrome virus in bovine sera

이효진,Eun-Ju Kim,최정수,Ji Youn Lee,조인수,신연경 대한수의학회 2016 Journal of Veterinary Science Vol.17 No.3

Severe fever with thrombocytopenia syndrome (SFTS) caused by the SFTS virus (SFTSV), a phlebovirus in the family Bunyaviridae, is an emerging tick-borne infectious disease that impacts humans. This disease manifests as a decreased blood cell count and multi-organ failure, with a case-fatality rate of more than 12% in China. Because vaccines or antiviral drugs for the treatment of this disease are not available, monitoring the SFTS circulation in animals and controlling the tick-mammal cycle are important for preventing SFTS. Monoclonal antibodies against the recombinant nucleoprotein of SFTSV were generated to develop a competitive enzyme-linked immunosorbent assay (cELISA) for the detection of antibodies against SFTSV infection in cattle. The specificity and sensitivity of cELISA was assessed by comparing the results of this assay to those of an immunofluorescence assay (IFA). The results of the cELISA using 416 field bovine serum samples and laboratory-immunized positive sera showed 98.1% consistency with those of the IFA. The cELISA used in this study did not show cross-reactivity with antisera against other viral cattle diseases. The cELISA presented in this study can be applied to detect antibodies against SFTSV in cattle.

패널모형을 이용한 도시특성요소가 범죄 발생에 미치는 영향 분석

이효진,이재송,최열,Lee, Hyo Jin,Lee, Jae Song,Choi, Yeol 대한토목학회 2015 대한토목학회논문집 Vol.35 No.6

본 연구는 사회학적 범죄이론에 근거하여 도시 지역의 특징과 범죄 발생 간의 관련성을 규명함으로써 효과적인 범죄예방 대책을 수립하는데 도움이 되고자 하였다. 연구를 위하여 지난 8년간(2005~2012) 대검찰청의 범죄데이터와 지역별 통계연보 등을 통한 인구사회학적 데이터를 이용하여 패널데이터를 구축하였고, 부산시의 16개의 구 군을 대상으로 패널모형으로 분석하였다. 분석결과를 바탕으로 범죄 발생을 줄이고, 범죄예방을 위해서는 첫째, 일반적인 범죄 예방책보다는 지역의 특성에 적합한 정책이 필요하다. 둘째, 범죄연구에 필요한 구체적이고, 정확한 범죄데이터를 활용할 수 있는 제도적 시스템이나 정책이 필요하다. 셋째, 앞으로도 사회과학분야의 제도와 함께 도시공학 및 여러 학문들이 연계된 연구의 수행이 이루어져야 할 것이다. This study, based on the sociological crime theory, is to examine the relation between urban characteristics and the incidence of crime, helping establish effective crime prevention measures. For doing so, the study employs crime data from the Supreme Prosecutors' Office and socio-demographic data including the regional Statistical Yearbooks -both from 2005 to 2012- to build the study's panel data, and analyzes the panel model on the 16 subordinate districts in the city of Busan. To reduce the incidence of crime and prevent crimes from occurring based on the analysis results, first, prevention measures specific to each region by its attributes are needed rather than general ones; second, new institutional frameworks or policies are required for utilizing accurate crime data; third, interdisciplinary research in which various fields including urban engineering are associated to that of social science is necessary to further the study.