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.

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.

우리나라에서 솔껍질깍지벌레의 분포확산

임유진,이상명,김동수,김준범,최광식,이신혜,박정규,이동운,Lim, Eu-Gene,Lee, Sang-Myeong,Kim, Dong-Soo,Kim, Joon-Bum,Lee, Shin-Hye,Choi, Kwang-Sik,Park, Chung-Gyoo,Lee, Dong-Woon 한국응용곤충학회 2012 한국응용곤충학회지 Vol.51 No.1

솔껍질깍지벌레는 우리나라 곰솔림의 주요한 해충의 하나이다. 본 연구는 우리나라에서 솔껍질깍지벌레의 분포를 알아보기 위하여 7개도 3개 광역시, 91개 시군구, 686 읍면동의 해송림에서 2010년 밀도를 조사하였다. 5개도 2개 광역시에서 솔껍질깍지벌레가 서식하고 있었는데 시군구별로는 조사대상의 64.8%인 59개 시군구에서 서식이 확인되었다. 솔껍질깍지벌레의 분포는 남해안 전역과 동해안의 포항, 서해안의 충남 보령지역까지 분포하였다. 충북과 대전광역시 및 제주도에서는 솔껍질깍지벌레의 분포가 확인되지 않았다. 부산지역은 16곳의 모든 구에서 솔껍질깍지벌레가 분포하였고, 시군 단위에서는 전남 해남군의 솔껍질깍지벌레 평균밀도가 1.713마리/0.785 $cm^2$로 가장 높았으며 읍면동 단위에서는 해남군 송지면이 6.36마리/0.785 $cm^2$로 가장 높았다. 곰솔 가지 내의 솔껍질깍지벌레 밀도와 솔껍질깍지벌레가 서식하고 있는 빈도와는 높은 상관관계가 있었다(상관계수=0.89). The black pine bast scale, $Masucoccus$ $thunbergianae$ (Hemiptera: Margarodidae), is a serious pest of the Japanese black pine, $Pinus$ $thunbergii$, in Korea. The distribution of the black pine bast scale was examined, looking overall at 686 towns (eup), townships (myeon) or neighborhoods (dong). There were Japanese black pine ($Pinus$ $thunbergii$) forests in 91 cities, counties (gun) and borough (gu), in seven provinces and three metropolitan cities during 2010. Black pine bast scale were found in 64.8% of cities or counties or borough (59) in 7 provinces and 3 metropolitan cities, and were distributed in all South Costal regions, Pohang in East Costal region and Boryeong in West Costal region. Chungcheongbukdo, Daejeon and Jeju did not have black pine bast scale. All the gu regions in Busan had black pine bast scale, of which the area with the highest prevalence was Haenam in Jeollanamdo (1.713 crawlers/0.785 $cm^2$). Songji-myeon had the highest occurrence rate (6.36 crawlers/0.785 $cm^2$) from the towns, township and dong. The density of black pine bast scale in twigs was highly correlated with percentage of the sample with scale (Correlation coefficacy=0.89).

유동상 생물막법을 적용한 BNR공법에서의 인제거 영향인자

박운지,김동욱,이찬기 江原大學校 産業技術硏究所 2006 産業技術硏究 Vol.26 No.B

In this study, the use of MBBR(moving bed biofilm reactor) process for Phosphorus Removal efficiency depending on seasons and the factors affecting phosphorus removal efficiency in the process is evaluated. As a result of experiment, T-P removal efficiency has its highest value in winter, (80.8%). and T-P removal efficiency has its lowest value in autumn, (49%). Optimum SRT for Phosphorus Revomal revealed is about 8.8 days and process performs more efficiently as the temperature decreases. It is accepted that nitrate to anaerobic zone is affecting the Phosphorus removal process. With increasing the organic loading rate, Phosphorus removal efficiency also increases. Also, an experiment has been conducted to find out the highest efficiency according to Media existence and it has revealed that Media addition provides better phosphate removal.

간질환자의 간질 관련 외상

오동호,박운규,이영주,김희태,김승현,김주한,김명호,신동진 대한신경과학회 1998 대한신경과학회지 Vol.16 No.4

강우 시 도시 하천으로의 비점오염원 유출특성

박운지,김동욱,안종화,이찬기 江原大學校 産業技術硏究所 2007 産業技術硏究 Vol.27 No.B

We studied runoff characteristics of combined sewer overflows in a city while it was raining. The event mean concentration (EMC) of biochemical oxygen demand (BOD), chemical oxygen demand (COD_(cr)), suspended solids (SS), total nitrogen (TN), and total phosphorus (TP) in one of the combined sewer sites in Chuncheon was 63.5-211.6 mg/L, 114.9-523.8 mg/L, 70.3-436.4 mg/L, 6.4-33.0 mg/L, and 1.09-6.81 mg/L, respectively, In another combined sewer, the EMC of BOD, COD, SS, TN, and TP was 42.1-131.4 mg/L, 107.7-256.5 mg/L, 33.7-221.1 mg/L, 7.9-26.4 mg/L, and 1.16-3.91 mg/L, respectively. The ratio of the cumulative pollutant mass and the cumulative discharged volume determined using all parameters (BOD, COD_(cr), SS, TN, and TP was over 1.0, which shows the first flush effect. Relationships between flow and loadings of BOD, C0D_(cr), SS, TN, and TP were 0.90, 0.89, 0.88, 0.89, 0.92, respectively. Although the size of two areas was almost same, Pollutant concentration and loading were different because of the amount of rainfall, rainfall intensity and basin area.

수치표고모델의 자동생성에 의한 수치정사사진제작

박운용,이인수,김정동 동아대학교 건설기술연구소 2000 硏究報告 Vol.24 No.1

This study deals with the product of digital orthophoto using DEM(Digital Elevation Model) from the Digitizer and from the Digital Phtogrammetric Workstation using GCP(ground control points), TP(tie points), and elevation match points each. Interpretation accuracy of the configuration of the earth of the orthophoto from Digital Photogrammetric Workstation is comparatible to that of the orthophoto obtained from the conventional Stereoplotter. So it will be expected that this method are very effective to the fast upgrade of GIS database, and road design, etc.

建築物을 土地情報시스템에 登錄하는 方法의 硏究

박운용,이동락,백기석 東亞大學校建設技術硏究所 2004 硏究論文集 Vol.28 No.1

In this study. we investigated 3 methods for precise registration of buildings into LIS. They are : 1. using digital topographic maps. 2. using registered building maps. 3. cadastral surveyings on sites. The first method was found that it hardly met required precision. and the second one was also lack of precision because of unmatched actual buildings with registered ones and many unregistered buildings. The last method produced the most precise results. although it required laborious cadastral surveyings on sites. Considering the importance of building registration as it shows the ownerships of properties. the third method was thought to be desirable.

지형공간정보체계를 이용한 상수도 관로의 종합적인 운영관리에 관한 연구

박운용,신상철,김정동 동아대학교 건설기술연구소 1997 硏究報告 Vol.21 No.2

The urban expansion and the modernization of the urban infrastructure need a new technology to message water service. GSIS gears an efficient management of manpower, saving of time and cost for data accumulation, by processing and managing in the form of unified data. As various types of data accumulated in relation to the construction of the infrastructure facilities, which comes out after the rapid urbanization of the areas, we need a rational GSIS to avoid the duplication and confusion of data and data system. In this study, I intend to suggest a scheme for the efficient administration of the urban infrastructure facilities, based on GSIS for the efficiency of the acquisition and utilization of data. Also, I propose a program to manage the urban-related information more efficiently and to establish a more advanced system of database, by drawing up Digital Map using standard type to set up database.

Rhizopus oryzae를 이용한 바이오 디젤 생산

박상무,홍승준,이기영,김동운 全南大學校 觸媒硏究所 2002 觸媒硏究 論文集 Vol.23 No.-

Biodiesel was produced from soybean oil and methanol using fermentation broth or lipase. Production yield was 62% and 53.5% with purified Rhizopus oryzae lipase and Rhizopus oryzae broth respectively. This yield of biodiesel was highest in case of water content of 20%