• KAPE Magazine
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• s.234
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• pp.4-6
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• 2016

축산물품질평가원에는 2016년 2월 현재 300여명의 직원들이 건강한 축산물의 생산 유통 소비 환경을 구축하기 위해 전국 각지 축산 현장을 누비고 있습니다. 현장에 계시는 생산농가나 유통관계자 등 축산 유통인이라면 축평원의 직원들과 함께 호흡을 나눈 경험이 있으실 테고 그만큼 익숙하시겠지요. 하지만 일반 소비자분들이시라면 등급정보지를 통해 살짝 엿봤다고는 하지만 생소한 점이 더 많으실 것 같습니다. 특히 축평원이라는 그림을 이루는 300여명의 다양한 구성원 조각들은 일반 소비자 뿐 아니라 축산 유통인들에게도 아직 미지의 세계가 아닐까 싶습니다. 그래서 준비했습니다. 2015년 '지원탐방'에 이은 기획 연재 2탄!! '우리, 만나볼란?' 다양한 이야기와 함께 하는 매력적인 축평원의 조각 다시보기. 많은 관심 부탁드립니다. 아울러 등급정보 $365^+$는 언제나 열려 있으니 '이 사람이 궁금하다'하는 인물이 있다면 제안해주세요. 열심히 취재해 매력 한 터럭까지 탈탈 털어 보여드리겠습니다!!

• Proceedings of the Korean Society of Soil and Groundwater Environment Conference
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• 2006.04a
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• pp.342-345
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• 2006

도시로의 인구 유입과 이로 인해 요구되는 도시 개발은 자연에 환경적 및 수리수문학적으로 부정적인 영향을 미치게 되며, 이러한 도시화는 산림이나 농경지와 같은 투수지역을 건물, 도로 등의 불투수지역으로 변화시켜 홍수파의 도달시간이 줄어들고 첨두 유량이 증가하여 수문변화를 유발하게 된다. 본 연구에서는 대전 소재 관평천 일대 도시화 진행 지역을 연구 대상으로 선정하여, 도시화 진행 초기부터 도시화 및 불투수층 증가가 인근 소하천 유출량과 시험 유역의 지하수위에 미치는 영향을 확인하고자 하였다. 이를 위하여 장기간에 걸친 모리터링 계획을 수립하고 관측을 시작하였다.

• Journal of the KSME
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• v.34 no.12
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• pp.918-928
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• 1994

금세기 들어 가스터빈 엔진이 실용화되기 시작한 후 1\ulcorner2차 세계대전을 거치면서 향공기 추진 기관으로서의 기술적 진화가 활발히 이루어져 오고 있다. 최근 항공기용 가스터빈 엔진은 100,000 LB급의 초대형 추진기관으로 발전되기에 이르렀고 사용연로의 효율성 및 안정성이 크게 향상 됨으로써 기술적으로 더 이상 개선의 여지가 거의 없을 정도의 수준에 도달했다고도 볼 수 있다. 이러한 추세와 병행해서 최근 분산형 발전설비의 개념이 전 세계적으로 활발하게 응용되고 천 연가스를 이용한 열병합 발전단지의 건설추세에 따라 발전설비용으로서의 가스터빈 응용이 증 가되는 추세에 있다. 또한 일본을 중심으로 가스터빈의 장점을 이용한 비상용 발전설비로의 사 용이 보편화되고 있다. 이 글에서는 발전설비용 산업용 가스터빈의 시장동향을 분석하고, 이에 관련된 소요기술 발전추세를 소개하며, 마지막으로 국내의 산업용 가스터빈 개발현황을 기술하 고자 한다.

• Journal of the Korean Association of Geographic Information Studies
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• v.15 no.2
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• pp.23-34
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• 2012

As the quality of life grows, the role of cultural facilities in urban areas is becoming more important. However, due to various reasons, the location of these facilities shows the geographical imbalance between urban regions. Even though provision of road network can improve this kind of urban problem, in many countries, the provision of urban infrastructure plays a role which is magnifies the cultural gap between regions and socio-economic classes. The findings of this study are as follows. First of all, the inequality of accessibility to cultural facilities is shown over the period. Cross-sectional data shows that the higher the income of a region, the higher the accessibility index(AI) of the zone to cultural facilities at any time. Next, the provision of road network contributes the improvement of AI of high income region. Finally the provision of new facilities has a tendency that these kind of facilities are located to make AI of high income zone better. It means that the decision making by city government intensifies the geographical inequality. This result would be very useful in the decision making process for determining the number and the location of cultural facilities and other similar urban infrastructure as well. Also it will be helpful for the selection of optimal location which considered not only physical distances but also social equalities.

• Journal of dental hygiene science
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• v.16 no.3
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• pp.249-255
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• 2016

The Ministry of Health and Welfare in Korea has enforced the oral health promotion program for elderly in Korea. There are the denture delivery program and the fluoride application-scaling program for elderly. Donggu Public Health Center in Daejeon has delivered the fluoride application-scaling program for elderly since the demonstration project in 2009. The official dental hygienists had a prior consultation with Dong-gu branch of Korean Senior Citizens Association in Daejeon. We expanded the program through government office, welfare centers, and nursing homes. The participants were satisfied with the public relations (95.2%), scaling (99.7%), fluoride application (91.5%), toothbrushing education (98.6%), and denture cleaning education (96.6%). After a medial accident with persistent bleeding, the pre-inspection survey about systemic disease and medication was reinforced. The official dental hygienists have agonized over the low participation of the low-income group and the overlap benefit with health insurance benefit of scaling. We suggested it be needed the assessment of the public oral health program to overlap with health insurance benefit.

• The Journal of Engineering Geology
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• v.32 no.4
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• pp.559-569
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• 2022

This study investigated the acidification and mixing with seawater of groundwater, stream water, and reservoir water in the Hunghae area of Pohang City, as well as the source of water expelled to the stream by liquefaction induced by the Pohang earthquake on 15 November 2017. Geologically, the area consists of Tertiary sedimentary rocks. We collected six samples of groundwater, five of reservoir water, four of stream water, two of liquefaction water, and one of seawater to analyze the chemical composition and stable isotopes (𝛿D and 𝛿¹⁸O). Gogkang Stream flows eastward through the central part of the study area into the East Sea. The groundwater and reservoir water in the lower part of the stream are acidic (pH < 4), have a Ca(Mg)-SO₄ composition, and high concentrations of Al, Fe, and Mn, likely due to the oxidation of pyrite in Tertiary rocks. The groundwater in the upper part of the stream have a Ca(Na)-HCO₃(Cl) composition, indicating the mixing of seawater with the stream water. The 𝛿D and 𝛿¹⁸O isotope data indicate the isotopic enrichment of reservoir water by evaporation. Based on the chemical and isotopic data, it is inferred that the two samples of liquefaction water originated from alluvium water in a transition zone with stream water, and from deep and shallow groundwaters that has been infiltrated by seawater, respectively.

• The Journal of Korean Institute of Electromagnetic Engineering and Science
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• v.12 no.2
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• pp.308-315
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• 2001

In this paper, a new power amplifier is proposed for reduction of amplified RX band noise signals as well as intermodulation distortion signals using feedforward technique. This power amplifier is implemented for IMT-2000 basestation TX frequency band. Both TX band intermodulation distortion signals and RX band noise signals are reduced by controlling variable attenuator, phase shifter and error amplifier. The proposed power amplifier, which contains two loops-intermodulation distortion signals cancellation loop and RX band noise signals cancellation loop, can provide duplexer with low TX path insertion loss for various wireless communication systems due to choice of loose RX attenuation characteristic. The principle of the proposed amplifier is described graphically based on the conceptual schematic diagram. A two-tone test for power amplifier is done at 2.14GHz with frequency spacing of 5MHz, and RX band rejection test is done over RX full band of 60MHz with 1.95GHz center frequency. Experimental results represent that the cancellation performance of intermodulation distortion signals and RX band noise signals are more than 3 1dB and 21dB, respectively.

• Proceedings of the Korea Water Resources Association Conference
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• 2022.05a
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• pp.503-503
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• 2022

미호천은 금강의 중권역에 위치하며 도심을 관통하는 전형적인 도심형 하천으로 금강대권역 물환경관리계획 내에서 다루는 지류하천 중 논산천과 함께 물환경 목표기준 미달성 하천으로 분류되어 중점관리 중권역으로 분류되어 있다. 금강 본류의 수질 악화에 큰 영향을 주는 하천으로 수질개선을 위해서는 목표기준 미달성 원인 파악 및 정책적 개선방안 모색을 통해 실질적인 정부와 지자체의 계획에 반영할 필요성이 있다. 그간 미호천 수질개선과 관련한 많은 연구가 진행되었으나, 연구의 대부분은 특정 오염원에 집중된 단기적인 조사에 편중되어 있다. 수질개선을 위한 정책분석 및 대응방안을 제시하기 위해서는 미호천 지류가 본류에 미치는 영향 등의 전반적인 하천 특성과 장기적인 이·화학적 수질 영향을 검토를 통한 정책적 지원 전략 수립이 필요한 상황이다. 본 연구에서는 미호천 수질개선을 목표로 수행되었던 환경기초조사업과 지자체별 정책사업들을 조사하고 수질개선 방안을 고찰함으로써 중권역의 수질개선을 위한 지역맞춤형 정책제언 및향후 지역 간 연계협력사업의 추진을 위한 참고자료를 제공하고자 하였다. 참고자료에는 수질현황조사 결과와 환경기초조사사업 및 미호천 관련 8개 지자체별 정책사업을 조사하였으며, 중권역 물환경관리계획에 수립된 예산 대비 현재까지 집행된 비율을 통해 이행도를 검토하였다. 마지막으로 미호천 수질관리 개선을 위한 축산오염원, 토지 비점오염원, 생활계 오염원, 산업계 오염원, 보 관리, 주민참여에 대한 부문별 개선방안을 제안하였다.

• Journal of Wetlands Research
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• v.14 no.2
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• pp.181-192
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• 2012

Dae Dong Stream basin has been selected and operated as a representative experimental basin of UNESCO IHP since year 2007. It is located at Daejeon Metropolitan city, Korea and hydrologic data such as precipitation, runoff, and water quality have been being collected and provided after establishing the monitoring plan as an experimental basin for city/disaster prevention. In this study, runoff characteristics for non-point sources of rainfall-runoff process from urban stream basins were analyzed using the flow and water quality data measured during the year 2011. As an operation result for the test subjected basin, rating curves at Panam Bridge and at Chulgap Bridge were prepared, and to compare runoff characteristics of non-point source by precipitation, by estimating the Event Mean Concentration(EMC) for 10 water quality items, runoff characteristics of non-point source per different observation points as per the precipitation, antecedent rainfall, and land utilization status were analyzed.

• Journal of Korea Water Resources Association
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• v.41 no.5
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• pp.463-471
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• 2008

The purpose of this study is to analyze the features of groundwater use to utilize as basic information for water-cycle analysis system development and effective groundwater management in the Kap-cheon basin. The cumulative relationship between groundwater use and the number of wells was analyzed to estimate the representative total groundwater use and the number of wells for the Kap-cheon basin. Then, the spatial distribution of groundwater use in the basin were figured out using the detailed information on groundwater use in each well. Finally, the reasonability of groundwater resources management in Kap-cheon basin was evaluated by comparing groundwater recharge and groundwater use in sub-basins and major stream basins. The results of the analysis showed about 25% of the total wells could represent 90% of groundwater use ($37,923,516\;m^3$/year) in the Kap-cheon basin. A detailed analysis on the groundwater uses in the vicinity of down-town areas of Daejeon metropolitan city showed high groundwater uses ($1.4{\sim}11.1$ times) compared to the groundwater recharge previously estimated using the rainfall-runoff model. The ratio of groundwater use and groundwater recharge for the major river basins in Kap-cheon basin ranged from 1.9 to 2.3 indicating that more sustainable groundwater management should be exercised. The results of this study can be used as basic information in evaluating the change of groundwater flow, stream flow and water-cycle for various groundwater uses in the Kap-cheon basin.