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김종성,이인,정태양,오승택,김국진,Kim, Jong-Sung,Lee, In,Jeong, Tae-Yang,Oh, Seung-Taek,Kim, Guk-Jin 한국지하수토양환경학회 2016 지하수토양환경 Vol.21 No.1
Bioremediation is one of the most effective ways to remediate TPH-contaminated sites. However, under actual field conditions that are not at the optimum temperature, degradation of microorganisms is generally reduced, which is why the efficiency of biodegradation is known to be significantly affected by the soil temperature. Therefore, in this study, the labscale experiment was conducted using indigenous crude oil degrading microorganisms isolated from crude oil contaminated site to evaluate the remediation efficiency. Crude oil degrading microorganisms were isolated from crude oil contaminated soil and temperature, which is a significant factor affecting the remediation efficiency of land farming, was adjusted to evaluate the microbial crude oil degrading ability, degradation time, and remediation efficiency. In order to assess the field applicability, the remediation efficiency was evaluated using crude oil contaminated soil (average TPH concentration of 10,000 mg/kg or more) from the OO premises. Followed by the application of microorganisms at 30℃, the bioremediation process reduced its initial TPH concentration of 10,812 mg/kg down to 1,890 mg/kg in 56 days, which was about an 83% remediation efficiency. By analyzing the correlation among the total number of cells, the number of effective cells, and TPH concentration, it was found that the number of effective microorganisms drastically increased during the period from 10 to 20 days while there was a sharp decrease in TPH concentration. Therefore, we confirmed the applicability of land farming with isolated microorganisms consortium to crude oil contaminated site, which is also expected to be applicable to bioremediation of other recalcitrant materials.
압력용기강 용접 열영향부에서의 미세조직 및 기계적 물성 예측절차 개발 및 적용성 평가
김종성,이승건,진태은,Kim, Jong-Sung,Lee, Seung-Gun,Jin, Tae-Eun 대한기계학회 2002 大韓機械學會論文集A Vol.26 No.11
A prediction procedure has been developed to evaluate the microtructures and material properties of heat affected zone (HAZ) in pressure vessel steel weld, based on temperature analysis, thermodynamics calculation and reaction kinetics model. Temperature distributions in HAE are calculated by finite element method. The microstructures in HAZ are predicted by combining the temperature analysis results with the reaction kinetics model for austenite grain growth and austenite decomposition. Substituting the microstructure prediction results into the previous experimental relations, the mechanical material properties such as hardness, yielding strength and tensile strength are calculated. The prediction procedure is modified and verified by the comparison between the present results and the previous study results for the simulated HAZ in reactor pressure vessel (RPV) circurnferential weld. Finally, the microstructures and mechanical material properties are determined by applying the final procedure to real RPV circumferential weld and the local weak zone in HAZ is evaluated based on the application results.
직교형으로 배열된 2개의 1x2서브-어레이를 이용한 433MHz에서 동작하는 RFID 리더용 안테나 설계
김종성,박승모,최원규,성낙선,Kim Jong-Sung,Park Seung-Mo,Choi Won-Kyu,Seong Nak-Seon 대한전자공학회 2005 電子工學會論文誌-TC (Telecommunications) Vol.42 No.9
본 논문에서는 433MHz에서 동작하는 RFID 리더용 직교형 안테나에 관하여 기술하였다 본 이중편파 안테나는 1x2 서브어레이를 기본으로 하여 급전회로망의 위상을 동위상 또는 반대 위상을 갖도록하여 2개 안테나의 방사체에서의 상대적인 전류 분포를 제어하여 빔 패턴에서 편파를 수직 및 수평으로 복사가 가능토록 하였다 단일 안테나는 역-에프형 구조를 이용하였으며 위상차에 따른 단락점에서부터 개방점 까지의 전류의 변화가 궁극적으로 수직 및 수평 편파가 제어되도록 하였다 이중입력에 대한 안테나의 이득은 수직 및 수평 편파에 대하여 2.7 및 0.4 dBi를 나타내었으며, 포트간 아이솔레이션은 25dB 이하의 특성을 나타내었다. An orthogonal antenna is presented for reader application of radio frequency identification (RFID) at 433 MHz. Two 1x2 sub-arrays are orthogonally placed on a ground plane and two different feeding networks are applied to control horizontal and vertical radiation current flows for each sub-array, respectively. Inverted-F structures are used as radiation elements and can generate two linear polarizations by relative current distribution of radiators forming sub-arrays. Antenna gains are 2.7 and 0.4 dBi and isolation between two input ports is less than 25dB.
김종성 ( Jong Seung Kim ),유방현 ( Bang Hyun Liu ),신영기 ( Young Kee Sin ),강수철 ( Soo Cheol Kang ),박순규 ( Soon Kew Park ) 대한내과학회 1973 대한내과학회지 Vol.16 No.8
A 16 year-old girl was admitted to the Busan National University Hospital with the complaints of jaundice, orthopnea, cyanosis, chest discomfort and cough on the Jan ll th 1972. She has the history of dyspnea 4 years prior to the admission and thereafter t
2차원 평면 이미지를 이용한 3차원 동영상 제작 기법의 고찰
김종성(Kim Jong-Seong),서영상(Suh Young-Sang),송승헌(Song Seung-Heon),김응곤(Kim Eung-Kon) 한국콘텐츠학회 2006 한국콘텐츠학회 종합학술대회 논문집 Vol.4 No.2
2차원 이미지는 오래전부터 발전되어온 훌륭한 표현 방법 중 한가지 이다. 하지만 단순한 2차원 이미지만을 가지고 보정과 편집을 통해 다양한 효과를 표현하는데 있어 여러 가지 한계가 있다. 본 논문에서는 2차원의 평면 이미지인 나비와 춘란의 이미지를 사용하여 나비의 날개짓과 춘란의 생장을 표현함으로써 단순한 2차원 평면 이미지를 사용하여 3차원 공간상에서 움직임과 동적인 느낌을 강조한 3차원 영상 제작기법을 구현하고자 한다. 이러한 영상제작기법은 동적인 효과를 가진 고품질의 영상을 쉽게 제작할 수 있기 때문에 개인 뿐만 아니라 전문방송과 영상 매체에 효율적으로 적용할 수 있다는 장점을 가지고 있다.
공동주택 무량판구조의 주요 골조계획에 따른 공사비 분석에 관한 연구
김종성(KIm, Jong-Sung),김승훈(Kim, Seung-Hun),조민주(Jo, Min-Joo) 한국주거학회 2016 한국주거학회 학술대회논문집 Vol.2016 No.4
In response to physical and functional life required by the latest “Long-Life House Construction and Certification Criteria,” the column-type system has been proposed as an alternative to the conventional wall-type system and various relevant systems have been developed. However, due to higher framework costs than the conventional wall-type system, the column-type system has not been widely distributed or implemented in Korea. In this study, structure design and economic feasibility of the wall system and flat plate frame for the same construction plan of an apartment house were evaluated and the framework construction costs of the two systems were compared. Also, in order to propose a framework construction plan to reduce the costs, construction costs were analyzed based on main members, concrete, and rebar strength.