• 지구물리와물리탐사
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• 제17권4호
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• pp.209-215
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• 2014

광물자원탐사 기술 개발의 일환으로 광대역 유도분극 탐사 자료를 활용한 광체의 부존 가능성 평가를 위해 모이산 지역에 대한 3차원 포텐셜 지도 구축 연구가 수행되었다. 현장 탐사 결과를 지질모델링 영역별로 해석하여 광체 영역에서 나타나는 위상 및 전기비저항 값의 분포 특성을 해석하였으며, 이를 바탕으로 모이산 광체에 대한 부존 잠재성 평가를 수행하였다. 잠재성 평가 결과 기존에 확인된 광체 영역에서는 높은 부존 가능성이 확인되었으며, 최근 시추를 통해 확인된 일부 광체 영역에서도 주변부에 비해 잠재성이 높은 것으로 해석되어 신뢰도가 높음을 확인하였다. 광체 분포특성에 따라 효과적으로 측선 설계가 이루어지고 보다 조밀한 광대역 유도분극 탐사 자료를 얻을 경우 이번 연구를 통해 습득한 해석 기술은 광체 평가에 효율적으로 적용될 수 있을 것으로 판단된다.

• 한국콘텐츠학회논문지
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• 제19권3호
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• pp.213-222
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• 2019

본 연구는 2000년대 등장한 다수의 분단영화 중에서 간첩영화와 남성 버디무비의 성격을 띤 세 편의 영화<공동경비구역 JSA>(박찬욱, 2000), <의형제>(장훈,2010), <공작>(윤종빈, 2018)을 중심 텍스트로 하여 남북 남성주인공의 관계 변화와 주요 공간적 배경의 차이와 상징성이 갖는 의미를 고찰하는데 목적이 있다. <공동경비구역 JSA>는 2000년대 분단영화의 서막을 연 작품으로 이전과는 다른 차원의 남북관계를 제시한다. 남북한 병사들이 비무장지대에서 만나 친구가 되고 북한군 초소에서 어울리는 것이다. <의형제>는 북에서 버림받은 남파 간첩이 생계형 간첩으로 살아가며 국정원에서 버림받은 전직 남한 요원과 동업을 하는 이야기다. 친구에서 형제로 나아간 남북관계에 대한 전망은 <공작>에 이르면 동반자의 관계로 성숙한다. 10년 정도의 시차를 두고 나온 세 영화들은 지난 20년 동안 이루어진 남북관계 변화 자체도 담고 있지만 남북관계에 대한 사회적 인식의 변화를 보여준다는 의미가 있다. 각기 다른 시기 다른 감독이 연출한 작품들이지만, 궁극적으로 통일서사를 지향한 행보를 읽을 수 있다.

• 한국초지조사료학회지
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• 제43권3호
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• pp.156-161
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• 2023

This study was conducted to determine the appropriate seeding dates by verifying the difference in winter survival and productivity of alfalfa according to fall sowing dates in the central area of South Korea. The experiment was conducted for 2 years (2020 and 2021) at the field in the Department of Animal Resources Development, NIAS located in Cheonan. Sowing dates started from September 18 to November 8 with 10 days of intervals during 2020 and 2021; SO1 (September 18), SO2 (September 28), SO3 (October 8), SO4 (October 18), SO5 (October 28), and SO6 (November 8). After sowing, the winter survival rate was measured in the spring of the following year, and the dry matter yield was measured by harvesting at 10% flowering and harvesting five times a year. SO6 failed to winter survival, and SO5 also had a lower winter survival rate than SO1~4 (p<0.05). The average annual dry matter yield of alfalfa linearly decreased with delaying sowing dates (p<0.05). The feed value did not differ in the same year by delaying the sowing date in the same year. These results suggest that sowing date should be started before October 18 to increase winter survival and productivity of alfalfa in the central area of South Korea.

• Advances in pediatric surgery
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• 제5권1호
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• pp.69-74
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• 1999

Condyloma acuminata, an uncommon disease m the pediatric patients, is being reported with increasing frequency in both adults and children. During the last 10 years, we managed 11 children with condyloma acuminata of the anogenital area. The patients' age at presentation varied from 9 months to 11 years, and boys outnumbered girls by a ratio of 2 : 1. The lesions were found in the perianal area in 9 patients and the genital area in 2. No history of sexual contact or abuse could be elicited. Although the exact mode of transmission of human papillomavirus(HPV) couldn't be defined, maternal-infant transmission at birth and close nonsexual family contact were the main possible causes of HPV infection in our patients. Our experience suggest that fulguration of the warts and concomitant excision with scissors of the larger lesions are the most satisfactory method of treatment in children. However, condyloma acuminata have high recurrence rate despite these treatments. Viral typing and careful epidemiological investigation on a larger series of patients may clarify the causative factors and effective modalities of treatment in childhood anogenital condyloma acuminata.

• 한국대기환경학회지
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• 제28권3호
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• pp.261-272
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• 2012

In this study, climate variability was predicted by the Weather Research and Forecasting (WRF) model under two different scenarios (current trends scenario; SC1 and managed scenario; SC2) for future urban growth over the Seoul metropolitan area (SMA). We used the urban growth model, SLEUTH (Slope, Land-use, Excluded, Urban, Transportation, Hill-Shade) to predict the future urban growth in SMA. As a result, the difference of urban ratio between two scenarios was the maximum up to 2.2% during 50 years (2000~2050). Also, the results of SLEUTH like this were adjusted in the Weather Research and Forecasting (WRF) model to analysis the difference of the future climate for the future urbanization effect. By scenarios of urban growth, we knew that the significant differences of surface temperature with a maximum of about 4 K and PBL height with a maximum of about 200 m appeared locally in newly urbanized area. However, wind speeds are not sensitive for the future urban growth in SMA. These results show that we need to consider the future land-use changes or future urban extension in the study for the prediction of future climate changes.

• 한국주조공학회지
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• 제30권2호
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• pp.83-88
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• 2010

Bulk amorphous alloys with reasonable glass forming ability and large plasticity were found in Zr-Cu-Al alloys. Further increase in the GFA and the ductility is expected by appropriately choosing a fourth element. In this study, we select Be as the fourth element and added to the Zr-Cu-Al system to synthesize $(Zr_{57.4}Cu_{38.1}Al_{4.5})_{100-x}Be_x$(x=0~16) alloys and the glass forming ability and the plasticity were measured. With Be addition, the supercooled liquid region (${\Delta}T_x$), the plasticity and GFA as high as $134^{\circ}C$, 20.5%, 7 mm, respectively, can be obtained. Herein, we present the effect of Be addition on the variations of various mechanical properties and thermal characteristics of the $(Zr_{57.4}Cu_{38.1}Al_{4.5})_{100-x}Be_x$ alloys.

• 한국대기환경학회지
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• 제25권1호
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• pp.57-74
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• 2009

In order to clarify the vertical ozone distribution in planetary boundary layer of coastal area with complex terrain, an observation campaign was carried out around Gwangyang Bay with dense pollutant emission sources during two days from June, 4 2007. For this observation are Radiosonde, SODAR(SOnic Detection And Ranging) and Tethered ozone sonde were employed. The surface meteorological and photochemical observation data provided by AWS (Automatic Weather System) and AQMS (Air Quality Monitoring System) were also applied for analysis. Synoptic condition is strongly associated with lower level ozone distribution in complex terrain coastal area. Since mesoscale circulation induced by difference of characteristics of land and sea and orographic forcing is predominant under calm synoptic condition, vertical distribution of ozone is complicate and vertical ozone concentration greatly fluctuated. However in second day when synoptic influence become strong, ozone concentration in lower levels is vertically uniform regardless of observation level. This results in vertical observation indicates that vertical ozone distribution is often determined by synoptic condition and also affects surface ozone concentration.

• 한국재료학회지
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• 제9권4호
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• pp.362-367
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• 1999

We intended to make the activated carbon fibers which could separate, remove and recover the volatile organic compounds of benzene, toluene, acetone and methanol. Changing activation temperature and time, large specific surface area and narrow pore distribution could be obtained. The activated carbon fibers have large adsorption capacity and selectivility for those organic compounds. We characterized the adsorption capability of the activated carbon fibers for benzene, toluene, acetone and methanol by BET specific surface area and pore size and micropore volume measurements. In the result of activation, the maximum value of BET specific surface area of the fibers was $1100\m^2$/g at $800^{\circ}C$ for 60 minutes and $K_2$O was reduced actively in this condition. Their average pore size was 5.8~5.9$\AA$. The activated carbon fibers prepared in this work had high adsorption rate to saturation and the selectibility for the above organic compounds. The adsorbed amount of acetone and methanol(diameter of$ 4.3\AA$ and $4.4\AA$ respectively) which are smaller than micropore diameter in size was 43~49%, which was larger value than benzene and toluene(in the same diameter as $5.9\AA$).

• 한국물환경학회지
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• 제30권6호
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• pp.622-631
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• 2014

The purpose of this research was to find a proper disposal rainfall extent to improve water quality. SWMM was applied to select catchment area and tested first flush load and rainfall extent. BOD 40mg/L was selected to dispose the first flush and sewer overflow with the same as the criteria of Sewerage Act. Design rainfall, BOD load ratio of first flush sewer overflow, and the ratio of disposal flow were analyzed under various rainfall distribution. BOD load and design rainfall to treat overflow in situation of first flush extent with 4.3~17.4% were 56~87% and 3.8~6.8 mm/day, respectively. In urban area, first flush loads were not correspond to land activities, but tend to increase with increasing rainfall amount and drainage area. The more the distribution of rainfall is similar to Huff-frontal or central distribution of rainfall, the more increase the first flush loads.

• 한국환경과학회지
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• 제23권12호
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• pp.2089-2099
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• 2014

Emissions from aircraft have impacts on the air pollution of airport and the surrounding area. There are methods of emissions calculated as Tier 1, Tier2, Tier 3A and Tier 3B. Thus, this study investigated emissions from aircraft at the Gimhae International Airport using EDMS(Emissions & Dispersion Modeling System) program. Results of estimation from aviation emissions, Tier 3B considering all parts which can occur at the airport has the largest amount emissions. In order to understand the relation between aviation emissions and distribution of ozone concentration over airport area, numerical evaluation were carried out. Although the difference of surface ozone distribution between numerical assessment with and without aviation emissions was little, effects of air pollution at airport area from aviation emissions of NOx and VOCs.