고랭지 농업 용수확보를 위한 소규모 빗물 이용시설 적용방안

전계원(Kye Won Jun)(全桂元),장창덕(Chang Deok Jang)(張昌德),정승권(Seung Kwon Jung)(鄭承權),전병희(Byong Hee Jun)(田炳熙) 위기관리 이론과 실천 2013 Crisisonomy Vol.9 No.8

최근 기후변화로 지난 2009년과 2012년에 강원도 태백시에서는 가뭄으로 인하여 엄청난 피해를 경험한 적이 있다. 또한 가뭄과 장마의 예측은 점점 더 어려워져 가는 실정이다. 특히 태백시의 87일간의 가뭄과 제한급수에 따른 피해액은 일상생활 134억원, 산업부문 338억원, 공공부문 47억원, 정신적ㆍ사회적 피해 1, 430억원 등 총 1, 949억원에 달하는 것으로 분석되었다. 태백시에 또 다른 큰 문제점은 가뭄으로 인한 고랭지 농업 피해로 인한 손실이다. 고랭지 배추를 생산하는 태백시는 우리나라 유일의 고산지역의 도시로서, 고랭지 농업이 특히 발달한 지역이다. 특히 태백 고랭지 배추는 태백시 농산품의 95.9%, 총 경지면적의 86.6%를 차지하고 있으므로, 배추의 생산성이 태백시 농산품 생산성을 대변한다고 할 수 있다. 본 연구에서는 태백시의 공공기관과 고랭지 농업 지역을 직접 방문하여 소규모 빗물 이용 시설에 대한 현황조사 및 시설의 상태를 점검하고 가뭄발생시 고랭지 농업지역의 피해를 최소화 할 수 있도록 소규모 빗물 이용 시설의 적용 방안 및 효과를 분석하였다. Recently, drought and rainy season are getting more serious. It is getting hard to forecast about drought because drought frequency is getting shorter than before. In 2009(winter) and 2012(summer), Taebaek-si was suffered from enormous damage due to the drought. Particularly, in 2009, cost of damage due to drought and restriction on water supply for 87days were estimated daily life sector 134 billion won, industry sector 338 billion won, the public sector 47 billion won, mental and social damage 1, 430 billion won. The other big issue of Taebaek is decrease in products of Highland Agricultural caused by the drought. Highland chinese cabbage which is the most important agricultural product in Taebaek-si account for 95.9% of all agricultural production of Taebaek-si and account for 86.6% of all gross area. For this reason, chinese cabbage of Taebaek-si is tropical agricultural product and is in charge of supply cabbage definitely. It is considered that if small scale rainwater harvesting system would be installed in highland agriculture area, it could reduce damage of drought at low cost and damage of cabbage would be decrease by system. For this study, We have researched regarding current status of Small Scale Rainwater Harvesting System of Highland Agriculture area in Taebaek-si and have compared with the amount of damage and installation cost in case of drought for the beneficial effects of Small Scale Rainwater Harvesting System, flexible supply of water and damage minimization of agricultural products.

Self-injection locking 방식을 이용한 2.4GHz ISM대역 수신기의 국부 발진기용 VCO 설계 및 제작

정원재,전계석 경희대학교 레이저공학연구소 2004 레이저공학 Vol.15 No.-

This paper suggests that the jitter of the VCO is reduced to improve the phase noise using a microstrip meander line structure. Also the phase noise is improved by using a self-injection locking method which the output signal of the VCO is feedback. A phase noise is an important factor to decide a sensitivity and selectivity of an entire system. The phase noise of the VCO using a self-injection locking method is -85.19dBc/Hz at the l0kHz offset from 1.08GHz carrier with 2V tuning voltage and -98.62dBc/Hz at the l0kHz offset from 1.18GHz carrier with 8V tuning voltage.

인공 산성비 용액 함침 및 경사평면법에 의한 옥외용 실리콘 고무의 열화 특성 평가

김정호,정규원,유영식,양계준,박용관 成均館大學校 科學技術硏究所 1999 論文集 Vol.50 No.1

We investigated the effect of acid rain on the surface aging, and resistance to tracking and erosion of silicone rubber materials : First, we measured the contact angle, SEM, EDX, and weight reduction to investigate the surface aging caused by immersion in the artificial acid rain solution. From the results of a series of experiments, we concluded that the acid rain attacked the base polymer of the surface, and lead to the depolymerization. Second, we adopted Inclined-Plane Method to measure the resistance to tracking and erosion of silicone rubber, and rather not observably affected the immersed specimen in the tracking resistance than in the erosion resistance.

레이더 반사강도와 강우강도의 지수함수계수 산정

안상진,김진국,전계원 충북대학교 건설기술연구소 2002 建設技術論文集 Vol.21 No.1

It is essential to estimate the spatial distribution of the rainfall for the effective water resources management in flood season. In hydrological practice, the estimation of the spatial distribution of the rainfall has been executed by Thiessen method and isoheytal line method which use surface raingauge data. But the surface rain-gauge data do not have the spatial continuity. The use of meteorological radar is very usefull to improvement the defect. Therefore, a rainfall estimation method was studied which simultaneously use the radar principle and the empirical method to setablish the relationship between radar reflectivity and rainfall rate was described And the quality test method of the radar and the coordinate conversion method was examined. Due to all of the priciples and methods mentioned above, the relationship between radar reflectivity and rainfall rate was estimated and tested from the data measured on the Chungju multipurpose dam basin in 2000. As the result of the test, two set of relation coefficients were estimated at fives raingauge sites, α=0.097~0.512, β=0.842~1.969. The radar rainfall estimation method studied in this paper is very helpful to get the spatial distribution of lood rainfal and to forecast eh flood slow.

호우로 인한 수공구조물의 홍수피해 영향

안상진,김진극,전계원,곽현구 충북대학교 건설기술연구소 2003 建設技術論文集 Vol.22 No.1

In this study, small water power dam established for water-power generation in rivers, it alnalyze about effect that get in innudated damage by storm. If construction is established in rivers, the flood discharge will not pass rivers harmoniously. By this cause, storage happens and backwater effect is happened to upper stream. Draw basin characteristics index using GIS method, and do link with HEC-HMS and calculated the flood discharge 14,659CMS to 19:00 August 7 in Yeongchun gaging station (No.108), storage effect of small water power dam is calculated by 1,940CMS and effect on the backwater analyzed water lever rise of 0.27m to Yeongchun 2 bridge(No.89+70).

고립성 폐결절의 조직학적 진단에 있어서 경기관지폐생검의 진단적 가치

김치훈,김정주,왕준호,연규민,김형수,리원연,용석중,신계철 건국대학교 의과학연구소 2002 건국의과학학술지 Vol.12 No.-

Transbronchial lung biopsy(TBLB) is a relatively simple and convenient diagnostic tool in solitary pulmonary nodule(SPN) on chest radiograph, which is cannot be diagnosed through routine tests. To investigate the diagnostic value and diagnostic rate of TBLB according to the variable factor, we analyzed 69 patients with radiologically SPN lesion on chest radiograph which was confirmed histologically. A histologic diagnosis of TBLB was made in 47 of 69 patients(68.1%), in which 26 of 37(70.3%) with malignancy and 21 of 32(65.6%) with benign lesion. There were no significant differences in diagnostic yield according to age, sex and location of the lesion. The diagnostic rate tended to increase with the more than 5 pieces to acquired by TBLB. When the size of SPN was less than 3 ㎝, it cannot be diagnosed. In conclusion, TBLB is a diagnostic procedure with good yield and safety, but percutaneous needle aspiration, transbronchial needle aspiration, and bronchial washing fluid cytology may be a complementary procedure to overcome the limitation of TBLB and get higher diagnostic yield for SPN.

다발성 대장암 간전이 환자의 간절제를 위한 새로운 시도

주종우,김형철,임철완,신응진,조규석,유기원,송옥평,홍대식,박성진,조준희,이혜경,김희경,권계원,고은석 순천향의학연구소;Soonchunhyang Medical Research Institute 2004 Journal of Soonchunhyang Medical Science Vol.10 No.2

Multiple bilobar liver matastases (MBLM) are the main cause of low resectability in the colon cancer liver metastases. The authors experienced one case of initially non-resectable colon cancer liver metastases. He was curatively and safely treated with a two-stage hepatectomy using the new method of future remnant liver volume growing. A 54-year-old man was referred to our department with the sigmoid colon cancer combined with MBLM, which were checked in two small metastatic lesions in the left lobe and five large sized lesions in the right lobe in the computed tomogram (CT). A laparoscopic assisted anterior resection was primarily performed. We performed the 1^(st) stage hepatectomy 3 weeks after the colon resection. Intra-operative Ultrasonogram (US) found 9 small superficial metastatic lesions in the left lobe. All that lesions were completely removed by non-anatomical wedge resection. An occlusion ballon catheter was placed in the right portal vein through a small branch of the inferior mesenteric vein at that time. The future remnant liver volume was sufficiently increased 3 weeks after the 1^(st) hepatectomy. A right hepatectomy was safely performed 22 days after the 1^(st) hepatectomy. The patient received a regional chemotherapy (interleukin2 based immuno-chemotherapy through hepatic artery) for 4 months, then received 9 cycles of systemic chemotherapy (biweekly Oxaliplation, leucovorin, plus 5-fluorouracil) without any recurrence evidence.

Epidemiological characterization of the antimicrobial resistant Enterococcus isolates from four major rivers in South Korea

Jun Bong Lee(Jun Bong Lee),Se Kye Kim(Se Kye Kim),Hyung Tae Lee(Hyung Tae Lee),Yeon Soo Chung(Yeon Soo Chung),Jae Won Song(Jae Won Song),Jang Won Yoon(Jang Won Yoon) 한국예방수의학회 2023 예방수의학회지 Vol.47 No.1

We investigated the epidemiological characteristics of the antimicrobial resistant Enterococcus isolates from the four major rivers of Korea in 2012. A total 316 surface water samples were collected from three distinct sites (nearby livestock farms, tributaries, and major rivers) at two different seasons (dry season: n = 76, wet season: n = 240). A total 654 bacterial cells were isolated from samples and their genus distribution were determined. We found that Gram-negative bacteria including various genera were prevalent (n = 522, 79.8%), and Enterococcus was the most common genus of Gram-positive bacteria (n = 119, 18.2%). The isolation rate of Gram-negative bacteria was higher in wet season, whereas that of Enterococcus isolates was higher in dry season. The prevalence of Enterococcus isolates was also higher nearby livestock farms than on tributaries and main rivers. Since Enterococcus isolate is a key indicator for animal fecal contamination, the following experiments focused on this microorganism. As compared to a previous report in 2006, the resistance rates in E. faecium to erythromycin (40.0% to 69.9%) and chloramphenicol (0% to 16.4%) were increased, whereas those to penicillin (56.0% to 4.1%) and teicoplanin (36.0% to 0%) were decreased. We also found that antimicrobial-resistant (AMR) E. faecium isolates from rivers and livestock samples shared similar pulsed-filed gel electrophoresis (PFGE) profiles, validating the transmission of AMR Enterococcus isolates from livestock to river. Taken together, this study provides us with detailed information about bacterial contamination status in four major rivers, and highlights the changes in AMR pattern of Enterococcus isolates, which are expected to have originated from livestock.

An Experimental Study on Sediment Discharge in River Channel for the Reduction of Sediment Disaster

Kye Won Jun,Mu Pyung Baek,Jong Ho Choi 위기관리 이론과 실천 2017 Crisisonomy Vol.13 No.9

최근 기후변화의 영향으로 집중호우 및 토사재해 발생빈도가 증가하고 있다. 이러한 토사재해로 인한 하도 내 피해예방 및 종합적인 토사 관리를 위해서는 정량적이고 시계열적인 토사이동량 파악 이 필수적이다. 그러나 우리나라의 재래식관측기를 이용한 직접적인 측정방법은 실제 측정이 용이 하지 않고 많은 비용과 인력, 시간이 소요된다. 특히 연속적인 측정이 거의 불가능한 상태에 있어 토사 이송에 관한 수문학적 요인과 메커니즘 관계를 정량적으로 분석한 연구는 부족한 실정에 있다. 따라서 본 연구에서는 하도 내 토사이동량 측정의 어려움을 개선하기 위해 실내수로실험에 하이드 로폰을 활용하였고 하이드로폰의 인지능력을 파악하기 위해 충돌음향 계측 및 분석을 수행하였다. 연구결과 하이드로폰이 인지할 수 있는 개별입자별 main충돌시의 최소 임계치 기준은 공급유량과 토사입자의 크기가 커질수록 증가하는 것으로 나타났다. Due to recent climate change, the frequency of heavy rainfalls and sediment disasters is increasing. In order to prevent damages caused by sediment disaster and implement a comprehensive sediment control, a time-series analysis of sediment discharge data is essential. However, in South Korea, it is difficult to measure them directly as they use conventional meters as measurement, which prevents research from presenting a quantitative relationship between hydrological factors and mechanisms with regard to sediment transport. In this regard, the study attempted to overcome difficulties related to the measurement of soil particle transport in river channel. It used acoustic signals to recognize the transport of sediment particles and established an indoor waterway experiment equipment with a hydrophone. As a result, it is found that the minimum threshold value for the main collision of individual particles perceived by hydrophone increased as the supply flow rate and the size of sediment particles increased.

Inhibition of in vivo staphylococcal infection by a bactericidal peptide-peptide nucleic acid targeting Staphylococcus aureus cytidine monophosphate kinase

( Jun Bong Lee ),( Hyung Tae Lee ),( Se Kye Kim ),( Jang Won Yoon ) 대한인수공통전염병학회 2019 창립총회 및 학술대회 초록집 Vol.2019 No.1

Introduction: Here, we report a novel bactericidal peptide nucleic acid (PNA) that can induce the antisense effect on Staphylococcus aureus cytidine monophosphate kinase Cmk, a putative essential component for bacterial species. Methods: Based on the genome sequence of S. aureus N315, a set of PNA conjugates with a bacterial penetration peptide, (KFF)₃K, were synthesized to target the seven potentially essential genes (cmk, deoD, ligA, smpB, glmU, pyrH, and ftsA) and further evaluated for their antibacterial properties in vitro as well as in vivo. Results: The results demonstrated that two peptide-conjugated PNAs (P-PNAs) ASP-cmk1 and ASP-deoD1, targeting either the cmk or the deoD gene, had the strongest inhibitory effects on the growth of S. aureus ATCC 29740 (a bovine mastitic milk isolate) in a dose-dependent manner. In vivo application of ASP-cmk1 resulted in a significant reduction of bacterial loads in mice intraperitoneally infected with a sublethal dose of S. aureus. Moreover, ASP-cmk1 greatly increased the survival rate of the breast-fed infant mice after intramammary infection of the lactating CD-1 mice. Conclusion: Taken together, our characterization of ASP-cmk1 demonstrated its bactericidal activity against S. aureus as well as its effectiveness in vivo.