하천 복원을 위한 과거 및 현재 자료 기반의 하천지형학적 특성 분석: 미호천과 내성천을 중심으로

이찬주,김지성,김규호,신형섭,Lee, Chan Joo,Kim, Ji Sung,Kim, Kyu Ho,Shin, Hyoung Sub 한국수자원학회 2015 한국수자원학회논문집 Vol.48 No.3

하천 복원을 위한 기초 작업으로서 자연 상태에 가까운 하천의 지형학적 특성을 파악하기 위해 과거 및 현재 자료를 이용하여 하천지형학적 분석을 실시하였다. 대상 하천은 미호천과 내성천이다. 분석에 포함된 지형학적 변수는 하곡변수인 곡저폭, 하도 형상변수인 사행도, 강턱하폭, 하도경사, 구성재료 변수인 하상재료, 지배 변수인 강턱유량, 비유수력이며, 지배적인 프로세스가 함께 고려되었다. 분석 결과 두 하천은 비슷한 유역면적을 갖는 모래하천이지만, 곡저폭, 하도 형상변수, 종단적 위치에 따른 지배적인 프로세스 등에서 차이가 있는 것으로 나타났다. 또한 지형학적 변수들 사이의 상호 관계를 분석하였다. 그 결과 강턱하폭은 강턱유량에 비례하여 증가하였고, 그 경향성은 기존의 연구 결과와 대체로 일치하고 있다. 강턱유량과 하도경사를 분석한 결과 미호천은 사행하천과 망상하천의 특성을 나타내고 있는 반면, 내성천은 대부분의 구간에서 망상하천에 해당하는 것으로 나타났다. 하도경사와 하폭수심비 관계를 이용하여 지배적인 프로세스를 분석한 결과 미호천은 사구-연흔의 특성을 나타내고 있으나 내성천은 하류에서는 망상하천 특성이 지배적인 반면, 상류에서는 여울-소 내지는 평하상 특성이 지배적인 것으로 나타났다. 과거 자료를 이용한 분석 결과는 정비된 하천의 자료를 이용한 분석 결과에 비해 합리적인 것으로 나타났다. As a basic work for river restoration, analysis on fluvial geomorphological characteristics is made using past and present data to understand close-to-nature geomorphic status. The Miho and the Naesung Rivers are targets of this study. Fluvial geomorphic variables including valley-floor width, sinuosity, bankfull width, channel gradient, bed material size, bankfull discharge and unit stream power are evaluated with dominant processes. Though common sand-bed rivers with similar catchment area, the Miho and the Naesung Rivers are different in terms of valley-floor width, channel shape variables and dominant processes related with longitudinal location. In addition, analyses on interrelationship among the geomorphological variables are carried. Bankfull width is shown to be proportional to bankfull discharge, as is in a rough agreement with the previous studies. Relationship of bankfull discharge and channel gradient shows meandering and braiding are prevalent in the Miho River, whereas the most of the sub-reaches of the Naesung River fall to braiding. Relationship of channel gradient with width-depth ratio indicates dune-ripple processes are dominant in the Miho River, while the Naesung River shows longitudinal diversity from braiding in the downstream sub-reaches to riffle-pool and plane-bed along the upper ones. Analyses based on the past data on a river in a close-to-nature status are thought to be rather reasonable in comparison with those on the same river in a engineered condition.

계절창고 속에 포장 저장된 과일의 호흡 예측 모델

김광섭,심승우,나현정,조인철,정흥조,박찬영 전남대학교 촉매연구소 2001 觸媒硏究 論文集 Vol.22 No.-

Fruit are normally kept in a pouch of cold storage room in winter. In this work, a mathematical model that is emulating the fruit respiration in the pouch of the storage has been established. The calculated result is compared to the actual measured gaseous composition change of pear in the packaging pouch LDPE film incorporated with silver coated ceramic powder. The presented model, that is combining polysaccharide digestion kinetics in pear, Fickian diffusion for permeation of the film and sigmoidal adsorption equilibrium between the film and gases, predicts the respiration of the pear in the packing film fairly well.

粉末洗濟에 대한 生分解度와 重金屬에 대한 硏究

김영철,김종섭,유찬주,주충열 漢陽大學校 環境工學硏究所 1997 環境科學論文集 Vol.18 No.-

현재 국내에서 시판중인 의류용 세탁 분말세제 6종을 대상으로 미생물에 의해 분해될 수 있는 정도를 파악하기 위한 생분해도(Biodegradability)를 측정하고 동시에 인체에도 직접적인 영향을 미치는 중금속(Pb,Cd,As 및 Hg)를 분석하였다. 분석결과 전제품이 KS 기준에 모두 적합하였으나 석유계 계면활성제인 AOS 또는 LAS가 다량 포함 되어있는 제품에서는 상대적으로 생분해도가 낮다는 것을 알 수 있으며 중금속 함유량은 제품 6종 모두 화장품 원료기준에 훨씬 못미치는 우수한 제품인 것을 알 수 있었다. As the subject of study of six kinds of laundry powder detergents for clothing that come into the domestic market at present, the biodegradabilities to understand the extent of microorganisms decomposition were measured and the heavy metals(Pb, Cd, As and Hg) to have a direct effect on human body were analyzed. Analysis results show that though they all suit KS(Korean Industrial Standards) well, powder detergents containing plenty of petroleum surface active agents have the lower biodegradability than the others and Heavy metal contents are that all of them are very good at the cosmetic material standards.

UASB에 의한 染料化學工場 廢水處理

김성우,임찬섭,박정호,성낙창,박승조 동아대학교 환경문제연구소 1996 硏究報告 Vol.19 No.1

This study has been carried out to measuring the biodegradability and toxicity of dyes chemnical factory wastwwater for anaerobic treatment. The experiment consisted of batch test pilot plant test. The results are as follows 1. Biodegradability assays were conducted at two assay concentration for 2gCOD and 5gCOD tat BMP are respectively 0.23㎥CH₄/ ㎏.COD, 0.16㎥CH₄/㎏.COD respresents the noninhibited bioconversion efficency also MRR were 1.080 and 0.959 represented. 2. In pilot plant experiment, COD removal efficency are up 65% represented according to changing COD loading rate from 0.15㎏COD/㎥.d to 2.6㎏COD/㎥.d 3. Alkalinity and Volatile, VA/Alkalinity as chemical factor of anaerobic was 1070∼1700㎎/ℓ, 30∼150g/ℓ and 0.02∼0.09 respectively. 4. According to changing COD loading rate from 0.15㎏COD/㎥.d to 2.6㎏/COD/㎥.d the methane gas production was 0.20~0.23]㎥ CH₄/㎏.COD_(rem)

중증 세균 감염 및 내성균에 대한 Fosfomycin의 치료효과

김찬기,노승무,윤완희,장일성,배진선,손기섭 충남대학교 의과대학 지역사회의학연구소 1991 충남의대잡지 Vol.18 No.1

A Clinical study for the therapeutic effect of Fosfomycin was made in 20 cases with the severe infection and the resistent organisms against the other antibiotics. Fosfomycin was administered intravenously 2-4 gm daily in two divided for an average of 13.1 days. The overall effectiveness was 90% without any significant side effect and the effectiveness for the resistant organisms(13 cases) against the other antibiotics was 84.6%. These results demonstrated that Fosfomycin can be used effectively in the treatment of the severe infection and the resistant organisms against the other antibiotics.

Propylene Glycol Alginate 제조에 관한 연구

오찬열,김영조,강동섭,강영주,이장순 제주대학교 해양연구소 1988 해양자원연구소연구보고 Vol.12 No.-

유효세율과 기업특성의 변화

노현섭 ( Roh Hyun-sub ),김정찬 ( Kim Jung-chan ) 한국세무회계학회 2018 세무회계연구 Vol.0 No.56

본 연구는 지난 26년 동안 유효세율의 추세를 분석하였다. 본 연구는 기간경과에 따른 유효세율의 추세를 분석하기 위하여 1991년부터 2016년까지의 기간 동안 6,312 기업-연도표본을 조사하였다. 본 연구는 또한 국외원천소득이 있는 기업의 국내 및 국외원천 유효세율을 분석하였다. 분석결과는 유효세율이 유의하게 감소하였다는 것을 보여주고 있다. 유효세율의 감소는 다국적기업에만 집중되지 않았으며, 다국적기업과 내국기업 모두 대략 유사한 비율로 감소하였다. 다국적기업의 경우 국외원천 유효세율과 국내원천 유효세율 모두 감소하였다. 마지막으로, 기업특성의 변화는 유효세율의 전반적인 감소의 일부만을 설명하고 있다. 추가분석의 결과는 기업특성을 통제한 후에도 유효세율이 유의적으로 감소하였다는 분석결과를 발견하였다. 본 연구는 유효세율의 기간추세를 분석함으로써 조세회피 연구에 공헌한다. 또한, 본 연구는 유효세율의 결정요인 연구에 공한할 것이다. In this paper, we investigate the trend in corporate effective tax rates over the past 26 years. To investigate the existence of a trend in effective tax rates over time, we examine a sample of 6,312 firm-year from 1991 to 2016. We study the trend in effective tax rates. We also examine domestic and foreign effective tax rates, which we use to test domestic versus foreign rates for corporations that have income from foreign sources(multinational firms). The results show that the effective tax rates have decreased significantly.The decline in effective tax rates is not concentrated in multinational firms, effective tax rates have declined at approximately the similar rate for both multinational and domestic firms. Within multinational firms, both foreign and domestic effective tax rates have decreased. Finally, changes in firm characteristics explain little of the overall decrease in effective tax rates. The Result of additional analysis suggests, that even after controlling for firm characteristics, we continue to see a significant decrease in effective tax rates over time. This paper contributes to the literature by executing an examination of time trends in corporate effective tax rates. And, this study is important for researchers interested in studying the determinants of effective tax rates.

간내담석의 치료에 관한 연구

孫基燮,金瓚起 충남대학교 의과대학 지역사회의학연구소 1990 충남의대잡지 Vol.17 No.2

Management of intrahepatic stones has been very complicated and troublesome problems in Korea as well as other countries in East Asia. It is quite differ from gallstones on Americans and Western Europeans, which are mainly located in the gallbladder. The true incidence of the biliary duct stones in Koreans is still uncertain but according to a review of collected series, which were reported in the magazines of Korean Surgical Society, for the last 30 years, the incidence of regions are 43.6% in gallbladder, 42.9% in common bile duct, and 13.5% in intrahepatic duct respectively, and the proportions of both intrahepatic ducts, left hepatic ducts and right hepatic ducts are approximately 52.4%, 36.2%, and 11.5%, nearly 5:4:1 in ratio respectively. It means nearly two thrid of intrahepatic stones are located in the left lobe of liver, and that, the management of left hepatic stones are more obstinate and bothersome than right hepatic stones. It seems to be related with a few reasones include 1) main branches of left hepatic duct makes a right angle, 2) It usually has a stricture at around the point of angulation, 3) As a result of those, bacterial infection is more aggrevated. Until first half of 1970s most of hepatic stones had mainly been treated with surgical intervention in many ways such as by-pass procedures including sphincteroplasty and choledochoduodenostomy, extended choledochojejunostomy, Longmire procedure, Roux-en-Y hepaticojejunostomy and with anchoring jejunal loop, hepatotomy, and lobectomy etc. Since second half of 1970s, a variety of nonsurgical therapy have been developed in many fields including oral bile acid chemolytic therapy, contact solvent dissolution, interventional radioiogy, endoscopic management, extracorporeal shock-wave lithotripsy (ESWL), electro-hydrauric lithotripsy and laser or other fragmentation technologies. Although these have been successfully treated in certain patient with intrahepatic stones and are enthusiastic trials but not always satisfactory, and have had a many limitation by each method only, and that the primary treatment of intrahepatic stones has still remain surgical. The prospect in the future, for the better therapy of hepatic stones we need better organized multidisciplinary therapy incorporating surgery, interventional radiology, and medical therapy etc, and surgical procedures of which suppose to be more simple and less extensive procedures. Instead of conclusion I'd like to present finally my experiences of managment of the hepatic stones especially left side of hepatic stones, namely combined choledocho-hepatochlangioplasty and lithotomy and interventional radiology. The result are as follows: 1. 9 cases, 53.0% were excellent results. 2. 5 cases, 29.4% has had retained stones two of which were removed the stones by interventional radiology.

8주간의 수영훈련이 호흡순환기능에 미치는 영향

유승희,김복현,심성섭,박찬호 경희대학교 체육과학연구소 1995 體育學論文集 Vol.23 No.-

In this study, ten students of department of physical education in K unversity participated in 8-week-swimming training. With the figures of respiration and circulation shown before the training and after the trainging, the conclusion came out as follows after comparison and analysis of the changes in the stability and the maximum figures. 1)The respiration of one time ventilation(TVE, ㎖) Looking info the quantity of one lime ventilation In the rest, it came out 946.47㎖, meanwhile, after the training, it fell down to 878.17㎖, which is lower by 68.39㎖ and the the percentage of decrease is 7.78%. But as for the maximum figures, in came out 3117.70㎖, while after the training, it was 3219.10㎖ and that's higher by 101.4㎖ and the percentage of increase is 3.15%. 2)The oxygen uptake(VO2, ㎖/min) In the rest, the quantity of Q2 taken into the lung was 540.83m7/min before the training, but after the trainging, it showed 405.63㎖/min, which was lower by 135.20㎖/min, and the percentage of decrease is 33.33%. But as for the maximum figures, it was 3701.60㎖/min before the training, while after the training, it was 3885.30㎖/min, which Is higher by 183.7㎖/min and the percentage of· increase is 4.73%. 3)The rate of gas exchange(R)In the rest, the rate of gas exchange showed no big difference between before (1.03) and after (1.03) the training. But in the maximum figures, it was 1.42 before the training, while it was 1.45, which was higher by 0.03 and the rate of increase is 2.07%. 4)The oxygen uptake per weight(VO2/W, ㎖/kg/min)In the rest, the quantity of O2 per weight was 8.05㎖/kg/min before the training. But after the training, it was 5.99㎖/kg/min, which was lower by 2.06㎖/kg/min, and the rate of decrease is 34.39%. But in the maximum figures, it was 53.64㎖/kg/min before the trainging, while it was 58.80㎖/kg/min, which was higher by 5.16 and the rate of increase is 8.78%. 5)Heart rate(HR, beats/min)Looking Into the heart rate in the rest, it was 74.24beats/min before the training, but after the training, it was 70.84beats/min, which was lower by 3.4beats/min and the rate of decrease is 4.79%. But in the maximum figures, before the training, it was 187.25beats/min while it came out 194.69beats/min, which was higher by 7.44beats/min and the rate increase was 3.82%. 6)O2 pluse(VO2/HR, ㎖/beats)In the rest figures came out 6.10 before the training, while after the training, it was 5.72㎖/beats which was lower by 0.38 and the rate of decrease was 6.64%. But in the maximum figures, it was 19.78㎖/beats before the training, but after the training, while after the training, it was 22.54me/beats, which was higher by 2.76 and rate of increase is 12.24%.

Streptomyces albulus 세정균체에 의한 polylysine의 대량생산

선흥석,김광섭,안치민,박찬영 全南大學校 觸媒硏究所 1997 觸媒硏究 論文集 Vol.19 No.-

Streptomyces albulus 세정균체를 이용하여 항세균물질인 폴리리신의 대량생산 가능성에 대하여 조사하였다. 발효기 배양에서 배양액 pH는 6.8에서 3.2로 감소하는 동안에 pH 4.0에서 4.5사이에서 폴리리신이 최대로 축적되므로 대수말기의 균체를 멸균증류수로 세척하여 마련한 세정균체를 아미노산 생산을 향상할수 있는 구연산을 2%첨가하고 pH를 최적인 4.2로 조정한 배지로 옮겨 배양하였다. 이러한 2단계공정으로 세정균체를 배양한 경우 배양액내의 폴리리신은 일반 1단계 단순 배양에 비하여 최대 6배의 축적량을 나타내었다. The feasibility of mass production of polylysine, an antibacterial substance, employing a washed mycelium of Streptomyces albulus has been investigated. Since the maximum accumulation of polylysine had appeared between 4.0 to 4.5 of pH during fermentor cultivation of which the pH of the broth has declined to 3.2 from 6.8, the strain growing in the broth on late log phase had been washed with sterilized water, then the sole mycelium had been transferred to another medium containing 2% citric acid having pH adjusted with NaOH to optimum of 4.2 to improve the production of the amino acid. The total accumulation of polylysine by washed mycelium of Streptomyces albulus from this two step procedure has exhibited 6 times more than the normal production of the simple one step fermentation.