• Journal of Korea Water Resources Association
• /
• v.52 no.1
• /
• pp.83-96
• /
• 2019

In order to properly manage the river water use, it is necessary to collect reliable data of river water use. However, It is not easy to get credible river water use data in Korea because there are some difficultites in reporting and measuring river water use data. Thus, Han River Flood Control Office has installed and operated measuring facility using V-ADCP on the EOUBO intake open channel in the Gosan-Bongdong station section of the Mankyung river, where the use of agricultural water is large. In this study, the applicability of the V-ADCP velocity profile method was evaluated for real-time river water use. For this reason, the parameter sensitivity of Chiu's 2D velocity distribution equation was analyzed and the optimal parameters based on actual discharge data were calculated. In addition, the characteristics of the velocity profile method were analyzed by comparative evaluation of the rating curve method and the index velocity method.

• Explosives and Blasting
• /
• v.30 no.2
• /
• pp.86-97
• /
• 2012

Ground vibration induced by a bench blasting in the construction site should cause the damage to the structure and indirect damage to a human body, and the vibration level is most practical descriptor for regulating the damage to human body and peak particle velocity is the descriptor for direct damage assesment of the structure. Meantime, the vibration level has not been considered for the blasting design but this study is the case that apply not only peak particle velocity but also vibration level on the blasting design. Also, we strongly believe that this study will be helpful for the management in the blasting site which some civil appeal is concerned. Total 232 measurements of both ppv and vibration level was used to estimate the scale distance. When the regulating threshold was ppv 0.3 cm/s and vibration level 75 decibel, the charge per delay to be estimated with vibration level could be recommended by 1.2~1.4 times than it of ppv. So, it is proven that considering vibration level on the blasting design is reasonable for not only prevention of the civil appeals but also effective blasting. Again, the blasting design which follows the law, "Noise and Vibration Control Act" can actually serve good condition to carry much more economical and effective blasting. The instruments used for this study are the SV-1 model, as first instrument in korea which can measure vibration velocity and vibration level at the same time.

• Journal of Korean Society of Environmental Engineers
• /
• v.27 no.6
• /
• pp.663-669
• /
• 2005

The aim of this study was to investigate the ozone decay pattern for the effective application of ozone in drinking water treatment. In order to measure the ozone decomposition in water, ozone measuring instrument was developed with flow injection analysis (FIA) method. From the result of continuous residual ozone concentration in water, it was confirmed that the ozone decay pattern was divided with instantaneous ozone demand(I.D) and pseudo first-order rate($k_c$) phases, which were influenced by the variation of ozone dose. The empirical model obtained from I.D and $k_c$ values enabled us to predict the residual ozone concentration according to the reaction time, showing the high correlation between model and experimental values. The concentration of OH radical and $R__{ct}$ could be indirectly measured by OH radical probe compound. In both I.D and $k_c$ phases, the production pattern of OH radical could be observed, which was also affected by the variation of ozone dose. Finally, it was confirmed that the ozone consumption rate was varied according to the each drinking water treatment process and seasoning. Therefore, the optimum position and dosage of ozone have to be selected by considering various factors.

• Progress in Medical Physics
• /
• v.22 no.1
• /
• pp.35-41
• /
• 2011

For overall system test, hidden-target test have been used using film which leads to inherent analysis error. The purpose of our study is to quantify this error and to propose gel dosimeter based verification technique for 3-dimensional target point error. The phantom was made for simulation of human head and this has ability to equip 10 gel-dosimeter. $BANGkit^{TM}$ which we are able to manufacture whenever it is needed as well as to easily change the container with different shapes was used as a gel dosimeter. The 10 targets were divided into two groups based on shapes of areas with a planned 50% isodose line. All treatment and analysis was performed three times using Novalis and $BrainSCAN^{TM}$. The target point error is $0.77{\pm}0.15mm$ for 10 targets and directional target point error in each direction is $0.54{\pm}0.23mm$, $0.37{\pm}0.08mm$, $0.33{\pm}0.10mm$ in AP (anterior-posterior), LAT (lateral), and VERT (vertical) direction, respectively. The result of less than 1 mm shows that the treatment was performed through each precise step in treatment procedure. In conclusion, the 3-dimensional target point verification technique can be one of the techniques for overall system test.

• The Korean Journal of Nuclear Medicine Technology
• /
• v.18 no.1
• /
• pp.122-126
• /
• 2014

Purpose: The new reconstruction algorithms (NRA) provided by vendor aim to shorten the acquisition scan time. Whereas depending on the installed version AutoQuant program used for myocardial SPECT quantitative analysis did not contain the normal data that NRA is applied. Thus, the purpose of this paper is to compare the results according to AutoQuant versions in myocardial SPECT applied NRA and half-time scan (HT). Materials and Methods: Rest Tl and stress MIBI data of total 80 (40 men, 40 women) patients were gathered. Data were applied HT acquisition and ASTONISH (Philips) software which is NRA. Modified autoquant of SNUH and old version of AutoQuant (full-time scan) provided by company were compared. Comparison groups were classified as coronary artery disease (CAD), 24 hrs delay and almost normal patients who have a simple pain patient. Perfusion distribution aspect, summed stress score (SSS), summed rest score (SRS), extent and total perfusion deficit (TPD) of each 25 patient who have above diseases were compared and evaluated. Results: The case of CAD, when using re-edited AutoQuant (HT) SSS and SRS showed about 30% reduction (P<0.0001), Extent showed about 38% reduction and TPD showed about 30% reduction in the tendency (P<0.0001). In the score of the perfusion, especially on the part of infero-medium, infero-apical, lateral-medium and lateral-apical regions were the biggest change. The case of the 24 hrs delay patient SRS (P=0.042), Extent (P=0.018) and TPD (P=0.0024) showed about 13-18% reduction. And the case of simple pain patient, comparison of 4 results showed about 5-7% reduction. Conclusion: This study was started based on expectation that results could be affected by normal patient data. Normal patient data is possible to change by race and gender. It was proved that combination of new reconstruction algorithm for reducing scan time and analysis program according to scan protocol with NRA could also be affected to results. Clinical usefulness of gated myocardial SPECT is possibly increased if each hospital properly collects normal patient data for their scan acquisition protocol.

• Research in Plant Disease
• /
• v.9 no.2
• /
• pp.94-98
• /
• 2003

To produce antibodies against Pseudomonas tolaasii and P. agarici, lyophilized P. tolaasii and P. agarici ($5{\times}10^7$ cfu/ml) and Freund, s adjuvant were immunized into rabbits 4 times. The specificity and sensitivity of the antibodies were evaluated by immunodiffusion test and indirect enzyme-linked immunosorbent assay (id ELISA). The ${\alpha}$-P. tolaasii antibody was very specific only against P. tolaasii, while ${\alpha}$-P. agarici antibody was not specific and showed a high cross reactivity toward P. tolaasii with detection limit concentration of $2{\times}10^3$ cfu/ml. However, the cross reactivities of ${\alpha}$-P. agarici antibody toward the related species including P. reactans were very low. Our results showed that ${\alpha}$-P. tolaasii and ${\alpha}$-P. agarici antibodies against P. tolaasii and P. agarici, respectively, might be useful for rapid and simple detection of the causal agents of bacterial brown and yellow blotches in cultivated oyster mushrooms.

• The Journal of The Korea Institute of Intelligent Transport Systems
• /
• v.12 no.3
• /
• pp.42-52
• /
• 2013

In this study, value of VMS (Variable Message Sign) traffic information is estimated by using CVM (Contingent Valuation Method), which is developed to quantify the value of non-marketable goods in environmental economics. CVM is used to estimate the value of goods provided by a project under consideration and then the project feasibility can be indirectly examined on the basis of the estimated value. This study focuses on estimating to estimate value of traffic information provided through VMS, a part of the transportation system enhancement project by Korea Expressway Corporation which is aimed at mitigating traffic problems on expressways. In particular, this study analyzes value of information separately by trip purpose, information type, and traffic flow condition. A state preference survey was designed to estimate the value of non-marketable traffic information. To maximize reliability of the survey results, a pilot survey was taken before the main survey. The open-ended question method was adopted in capturing users' willingness-to-pay. Both Tobit and binary Probit models were applied in estimating the value of VMS traffic information and their parameters were estimated using the maximum likelihood estimation. The estimation results suggests that the value of traffic information perceived by users is 518.28 KRW.

• Journal of the Korean Wood Science and Technology
• /
• v.38 no.6
• /
• pp.518-525
• /
• 2010

Infrared (IR) thermography which is the technique for detecting invisible infrared light emitted by objects due to their surface thermal condition and for producing an image of the light has been applied in various field without damaging the objects. It also could be used indirectly to examine the inside of an object. In this study, insulation property of wooden house in Korea Forest Research Institute (KFRI) was evaluated with according to "Thermal performance of building - Quantitative detection of thermal irregularities in building envelopes - infrared method (KS F 2829)". This method uses "Temperature Difference Ratio (TDR)" between outdoor wall surface and indoor wall surface of wooden building for evaluating its thermal performance. The thermal performance of a room on the 2nd floor of the wooden house was focused in this study and IR thermography on the indoor and outdoor surface of the house was captured by IR camera. Heat loss from the corner and the window of the wooden house as well as wall of the house was quantitatively evaluated and the invisible heat loss in the wall was detected. It is expected that the results from this study could contribute to improve the wooden building energy efficiency.

• Proceedings of the Korea Water Resources Association Conference
• /
• 2023.05a
• /
• pp.441-441
• /
• 2023

통합물관리는 2000년 이전부터 필요성이 논의되다가 2019년 물관리기본법이 제정·시행되면서 수량, 수질, 수생태, 방재 등 분야의 물관리 통합이 단계적으로 추진되고 있다. 수자원장기종합계획, 물환경관리 기본계획, 국가물관리기본계획, 4대강별 유역물관리종합계획 등이 수립되거나 수립중에 있다. 2021년 6월에 수립된 국가물관리기본계획에서는 통합물관리 정량지표들을 물환경, 물이용, 물안전, 물산업, 거버넌스의 5개 분야로 구분하여 제시하였고, 4대강 유역물관리종합계획(안)에서는 국가기본계획의 지표들을 근간으로 유역별 특성을 고려한 정량지표를 설정하고 있다. 수자원장기종합계획부터 유역물관리종합계획까지 통합물관리 정량지표들의 변천 내용과 현황을 검토하였다. 수자원장기종합계획(2016~2020)의 전략과 목표는 "①맑은 물 공급: 급수보급율, 관망 복선화율, 댐 부족량 공급기준, 비상급수 피해인구, 스마트시티 음용률, 누수율 저감, 물 기본법 제정, ②홍수안전 기반구축: 하천기본계획, 하천정비, 수해금액, 도시하천 종합치수대책 수립, 국가하천 홍수예보 지점, 홍수예보시간 단축지점 비율, ③친수환경 조성: 하천유지유량, 하천 이용객, 어류종 및 철새종 증가, ④수자원산업 및 기술개발: 일자리, 수자원산업 육성제도, 해외수주액, 외국 MOU, 국제회의, 남북공유하천 협의"이었다. 물환경관리 기본계획(2016~2025)의 전략과 목표는 "①물순환 체계: 불투수면적률 25% 초과지역, ②깨끗한 물 확보: 상수원 수질달성, ③생태계 서비스 증진: 수생태계 건강성 달성, ④물환경 기반 조성: 산업폐수 유해물질 배출저감, 상수원 4대강 보의 총인 농도와 남조류 세포수, ⑤경제·문화적 가치 창출: 국민체감 만족도"이었다. 국가물관리기본계획에서는 "①물환경: 하천·호소 목표수질 달성률, 수생태계 건강성 B등급 이상 비율, ②물이용: 수돗물 만족률-직·간접 음용률, 노후 상수관로-하수관로 개량, ③물안전: 가뭄피해 인구, 홍수피해 인구-피해액, 댐안전성 강화율, ④물산업: 물관리 R&D 예산, 수량·수질·수생태 통합측정 중권역 비율, 물산업 매출액의 수출액 비중, 한국 주도 국제협력 의제, ⑤거버넌스: 미정"을 계획지표로 하였다. 유역종합계획에서는 4대강별로 거버넌스를 포함하여, "①물환경: 국가계획지표, 주요 상수원 수질, ②물이용: 노후 상하수관로 개량, 지방상수도 유수율, ③물안전: 한해 인구, 수해 인구-피해액, 하천정비율, ④물산업: 물산업 일자리 창출, ⑤거버넌스: 물포럼, 시민참여활동"을 정량지표로 고려하고 있다.

• Journal of the Korean Data and Information Science Society
• /
• v.27 no.6
• /
• pp.1465-1475
• /
• 2016

In order to secure safe meals, the hazards of microorganisms associated with food poisoning accident should be monitored and controlled in real situations. It is necessary to determined the correlation between existing common bacteria number (aerobic plate count; APC) and RLU (relative light unit) in cookware. In this paper, we investigate the correlation between ATP (RUL) and APC (CFU) by using three types of transform (inverse, square root, log transforms) of raw data in two steps. Among these transforms, the log transform at the first step has been found to be optimal for the data of cutting board, knife, soup bowl (stainless), and tray (carbon). The square root-inverse and the square root-square root transform at the second step have been shown to be optimal respectively for the cup and for the soup bowl (carbon) data.