Event Mean Concentrations (EMCs) and First Flush Characteristics of Runoff from a Public Park in Korea

Jung, Jae-Woon,Park, Ha-Na,Yoon, Kwang-Sik,Choi, Dong-Ho,Lim, Byung-Jin The Korean Society for Applied Biological Chemistr 2013 Applied Biological Chemistry (Appl Biol Chem) Vol.56 No.6

Characteristics of non-point source (NPS) pollution runoff from a public park in Gwangju, Korea were investigated. Results exhibited the highest pollutant concentrations at the start of the rainfall events due to their build-up and wash off processes. The average event mean concentrations (EMCs) were 27.8, 7.2, 56.3, 7.5, and 0.84 mg/L (range: 4.2-54.8 mg/L) for COD, (0.5-20.8 mg/L) for TOC, (22.3-138.4) for SS, (1.4-18.5 mg/L) for T-N, and (0.17-2.02 mg/L) for T-P, respectively. The study site presented a strong first flush effect for most rainfall events. However, no first flush effect was observed in rainfall events with small rainfall factors (e.g. intensity, amount, and runoff depth). On the other hand, the ratios of total pollution loads discharged by the first 20% of runoff volume were 32% for COD, 34% for TOC, 36% for SS, 42% for T-N, and 50% for T-P. Especially, $MFF_{20}$ (mass first flush) values of T-N and T-P were larger than those of other pollutants (COD, TOC, SS), indicating that T-N and T-P are easily transported by stormwater runoff from the public park. First flush management of T-N and T-P, therefore, is required for efficient water quality management of the public park.

Linear Combination Analysis Using GPS Data

Park, Woon-Yong,Lee, Dong-Rak,Back, Ki-Suk,Hong, Jung-Soo 東亞大學校 建設技術硏究所 2005 硏究論文集 Vol.28 No.2

We can process and compute the position, velocity and time by satellite signals of GPS. The signals are used to compute positioning of three dimensions and timing offset of the receiver clock when we can track the tour satellite signals at least. One of the specified aims is to use less expensive single frequency code/carrier phase GPS receivers, which are typically around half the price of dual frequency receivers. In the study, the author analyzed the accuracy and applicability of frequence linear combination using triangulation points evaluated distance limitation.

Earnings Management by Controlling Shareholders in Anticipation of Stock Gift Transactions

Woon?Oh Jung,Sung?Ook Park 한국경영교육학회 2009 한국경영교육학회 학술발표대회논문집 Vol.2009 No.12

메치실린 내성 포도상구균에 대한 SK-302의 시험관내 및 생체내 효과

박윤선,김수기,신운섭,최선주,정종순,이종수 關東大學校醫科大學醫科學硏究所 1998 關東醫大學術誌 Vol.2 No.1

SK-302 is the active compound purified from culture filtrate of a streptomyces species (streptomyces sp. 302). The in vitro and in vivo antibacterial activities of SK-302 were evaluated against 6 clinically isolated MRSA strains and compared with the activities of vancomycin. SK-302 had node in virto antistaphylocoal activity stronger than that of vancomycin exhibiting MIC's, while vancomycin showed very weak 4 to 8fold lower than that of vancomycin. In SK-302 showed killing activity at the MIC, so SK-302 was superior to vancomycin. Furthermore, in acute systemic infections in mice, the ED_50s of SK-302 against infections by high-resistance MRSA were 30 to 40-feold less than that of vancomycin, therefore SK-302 showed potent in vive therapeutic efficacy against MRSA infection, These results suggest that SK-302 has excellent in virto in and in vivo activities against high-resistance MRSA.

초등학생의 식습관과 영양지식 및 건강상태 조사

박미정,박금순,박운제 동아시아식생활학회 2003 동아시아식생활학회지 Vol.13 No.6

This study was conducted to investigate the food habit, nutrition knowledge and health status of elementary school students in Kyung-buk area. As for dietary pattern, 65.8% of students ate breakfast and 82.9% ate dinner on a dally basis. Their main dish for the meal was boiled rice with soup and this combination accounted for 60.3% of the breakfast items and 67.8% of the dinner items. Students in both rural and urban areas had dinner more regularly than breakfast. Overall knowledge on nutrition was 7.31 points out of 10. Urban students earned 7.33 while rural students did 7.29. Out of the maximum of 20 points, the overall grades on physical health were 15.57. (15.44 in rural areas and 15.70 in urban areas) As a result of their spiritual health condition, rural children recorded 6.63 point and urban children recorded 6.81 point on a 10 point scale. Furthermore, 32.8% of the children of the respondents had spiritual awareness phenomenon. The better the understanding of nutrition, the sounder mind and physical health stemed from the good dietary habits. Also the data showed that relatively young parents had better dietary habits than the older ones.

KOMPSAT-1 EOC영상을 이용한 정사영상생성의 정확도 향상

박운용,이현우,정공운 東亞大學校 建設技術硏究所 2001 硏究論文集 Vol.25 No.2

KOMPSET -l(Korea Multi - Purpose SA Tellite-1) Platformed EOC(Electro –Optical Camera) could collect high resolution images of 6.6m during photograph, it possible for get on tilt image on the lean about 45 degrees on satellite body. According as, it has possibility that we take a photographing pair of tilt image about same place from two of different orbits. KOMPSA T-1 sensor of mission is the Korean map drawn on a scale of 1: 25,000 image becoming. Following study, KOMPSAT-1 platformed automate feature extraction and using of stereo satellite image, it certify interpret through reducing influence of sensor, rid of preprocessing, also, we intend to discuss ortho-images production of appropriateness. Because of this study, we conclude to the next in that fact. The case make use of 6, 7, 9 of ground control point evenly spread, 3-D positioning possible about horizontality, verticality of location as a 95% of reliance rate ,in case nine of ground control point, RMSE 6.0752m, 9.8274m. In case of ortho-image RMSE 17.568m, elevation error become 36.82m. Elevation accuracy is inferior as compare with positioning accuracy. Because it analyzed by image matching problem.

JPEG 압축 이미지를 이용한 수치사진측량의 정확도

박운용,곽두호,정성모,김천영 동아대학교 건설기술연구소 2001 硏究報告 Vol.25 No.1

The aim of our research is to find out how digital photogrammetry responds to image compression. Specially, we wish to know if using JPEG image compression leads to loss of accuracy in DTM derived by digital methods. We first review JPEG compression, and since we use the PCI OrthoEngine Airphoto Edition v6.3 digital phtogrammetry software, we briefly review it's principle of principle of operation. We use knowledge of the effect of JPEG compression on the geometric accuracy of images to predict the influence of compression on DTM accuracy. We then compare this to estimates derived from actual measurements. We find that the actual effect om DTM accuracy is greater than predicted, and consistent with geometric error due to compression in the region of 0.33 pixel.

측위 기법별 1등 수준망에 대한 정확도 분석

박운용,안상준,정순룡 東亞大學校 建設技術硏究所 2002 硏究論文集 Vol.26 No.1

Currently, the management of Triangulation-station and Bench-Mark is conducted by National Geography Institute(NGD). In this study, we are measured the official products of First Order Bench Mark and calculated the residual errors which are differences between the official product and results by Static-GPS, TS and PL-1 for same points. Then, we are compared each leveling techniques and analyzed the leveling accuracy. For the result achieved by each measurements, first, we are defined that the PL-1 could obtain higher accuracy than the others but the efficiency is low for taking many time second, TS could obtain low accuracy. We defined that Static-GPS is more economical than TS, PL-1. The efficiency and the accuracy by static-GPS are very high. Particularly, the residual errors for all survey line of NO.3 point are out of allowable error. So, GPS is contributed to the leveling survey for the efficiency, time and cost.

키토산 및 목질탄화물 처리가 마늘, 양파의 생육 및 수량에 미치는 영향

朴貞鉉,金炳云 목포대학교 자연자원개발연구소 2000 자연자원연구 Vol.3 No.-

The effect of woody charred materials and chitosan treatment before planting on the growth and yield of garilc and onion was investigated. Chitosan solution dipping treatment was effective on the growth and yield of garlic. Dipping treatment of 1000㎎/L chitosan solution followed by charcoal powder coating before planting also increased growth and yield of garilc. Pyroligneous acid and chitosan treatment followed by charcoals powder coating increased the dry matter ratio of onion.

박막 크로멜-알루멜 열전퇴형 교류-직류 변환기

정인식,김호운,김진섭,이정희,이종현,신장규,박세일,권성원 경북대학교 센서기술연구소 1998 센서技術學術大會論文集 Vol.9 No.1

A planar chromel-alumel multijunction ac-dc converter was fabricated on a LPCVD Si_(3)N_(4)/SiO_(2)/Si_(3)N_(4)-diaphragm, prepared by silicon bulk micromachining, which thermally isolated a bifilar evanohm-heater and the hot junctions of a chromel-alumel thermopile from the silicon substrate. The voltage responsivity, the ac-dc transfer error, and the fluctuation of the output thermoelectric voltage of the converter were investigated. The respective voltage responsivities in air and in a vacuum of the converter were about 3.16 mV/mW and 9.41 mV/mW. The ac-dc voltage and the current transfer errors in air were about ±1.5 ppm and ±0.7 ppm in a frequency range from 10 Hz to 10 kHz, respectively. The fluctuation of the output thermoelectric voltage from 5 seconds to 120 seconds after preheating in air for 5 seconds was about 0.06 % for a heater input of dc 1 V.