우리나라 湖水의 Chlorophyll-a 濃度와 無機營養鹽類 사이의 相關性 分析

金東植,方起雄 大田工業大學 1992 한밭대학교 논문집 Vol.9 No.2

ABSTRACT Summer mean data derived from various survey reports on Korean lakes since 1980 were used in order to relate chlorophyll-a concentration to inorganic nutrients and to find limiting nutrients to phytoplankton growth. From the analysis of data, POY4-P is an important limiting nutrient in Korean lakes. When the ratio of Inorganic-Nitrogen/POY4-P was greater than 17 and POY4-P concen- tration was less than 60mg/m3, the limiting nutrient was POY4-P, especially. A simple regression of chlorophyll-a concentration to inorganic nutrients showed that the models were log(Ch. -a)=0.563 log (POY4-P) -0.024 and log(Chl.-a)=1.377 log(Inorgan.-N)-3.225. Correlation coefncients of models in Korean lakes were Iower than those in foreign natural lakes. These reasons might be related to Iow transparency caused by SS from inflowing stream and short hydraulic retention time in Korean lakes. Summer mean data derived from various survey reports on Korean lakes since 1980 were used in order to relate chlorophyll-a concentration to inorganic nutrients and to find limiting nutrients to phytoplankton growth. From the analysis of data. PO_4 -P is an important limiting nutrient in Korean lakes. When the ratio of Inorganic-Nitrogen/PO_4-P was greater than 17 and PO_4-P concen-tration was less than 60mg /m^3, the limiting nutrient was PO_4- P, especially. A simple regression of chlorophyll -a concentration to inorganic nutrients showed that the models were log(Ch. -a)=0.563 lo9(PO_4-P)-0.024 and log(Chl.-a)=1.377 log(Inorgan.- N) -3.225. Correlation coefficients of models in Korean lakes were lower than those in foreign natural lakes. These reasons might be related to low transparency caused by SS from inflowing stream and short hydraulic retention time in Korean lakes.

물질남용 치료프로그램 후 재범여부에 대한 예비적 추적조사 연구

김현수,조선미,오은영,임기영,정영기,윤웅장,이영미 大韓神經精神醫學會 1999 신경정신의학 Vol.38 No.6

연구목적: 본 연구는 물질사범에게 시행되는 수강명령 프로그램의 효과를 재범률을 중심으로 살펴보고자 한 것이다. 방 법: 이 연구의 대상집단은 보호관찰소에서 의뢰받은 물질남용자집단이다. 이들은 법원으로부터 보호관찰, 수강명령, 치료명령, 사회봉사 등을 부과받았다. 총 104명의 대상자집단을 치료프로그램을 이수한 수강군과 비수강군으로 나누었으며 이들에 대한 재범률을 조사하였다. 결 과: 프로그램을 이수한 수강군이 비수강군에 비해 재범률이 낮았다(p<.05). 또한 단기 수강군과 장기수강군의 재범률의 차이를 조사하였는데 대상자 집단의 수가 적기 때문에 장기 수강군의 효과가 통계적으로 입증되지는 않았다. 결 론: 우리는 물질남용자에 대한 정책이 보다 교육적으로 변화할 것을 본 논문을 통하여 제시하려 하였으며 정부 및 법무부는 물질남용자에게 교육과 치료를 제공해주어야만 한다. Objectives: Using recidivism rate, we investigated the outcome after our substance abuse treatment program had been implemented. Methods: Our target population was substance abuse criminals referred by probational office. They either received the parole and probation order, treatment order or social service order from the court. We divided 104 substance abuse criminals into treatment group and non-treatment group. We examined their recidivism rate. Results: We reached a conclusion that treatment group had lower recidivism rate than non-treatment group(p<.0.5). We examined the effectiveness of short-term and long-term programs. However, no effectivess of long-term program was found because the sabject number was too small. Conclusion: We suggest that the strategies for substance abuse should be changed to more educative ones. The Government and Ministry of Justice must provide education and treatment to the substance abuse criminals.

정지영상 압축을 위한 이진적응에 관한 연구

김향태,위승정,정재영,최호진,최봉한,이웅기 조선대학교 통계연구소 1999 統計硏究所論文誌 Vol.1 No.1

대용량 저장장치의 출현, 컴퓨터 성능 및 초고속 망의 급속한 성장, 디지털 필름스캐너의 성능 향상 및 비용 감소 덕분에 디지털 형태로 영상을 다루기 위한 요구가 점차 증대되는 추세이다. 디지털 영상은 항상 고품질을 유지해야 하므로 화소 당 비트를 높게 할당하는데 이때 소요되는 방대한 비트 수를 효과적으로 감소시켜 저장용량 및 대역폭을 줄이기 위해서는 효율적인 영상 압축이 요구된다. 본 눈문은 디지털 영상의 압축을 위한 새로운 이진적응 방식을 제안한다. 먼저 변환된 예측오류를 얻기 위해 적응예측을 하고, 모델 템플리트로부터 적당한 예측오류 값 영역을 하나의 context영역이 되도록 하는 방식으로 부호화에 적절한 수의 context 영역을 결정한다. 그리고 부호화 효율을 개선하기 위해 개별적인 context 영역에서 부호화 될 예측오류가 나타날 확률을 근접하게 추정한 후, 고 빈도 예측 심볼 집합을 이진적응에 적용하여 부호화의 효율을 개선한다.

항공기용 착륙장치 완충기내 유동해석

김학봉,임경호,나기웅 한국 항공대학교 항공산업기술연구소 1996 航空宇宙産業技術硏究所 硏究誌 Vol.6 No.-

항공기 착륙장치 완충기내 유압유의 유동특성을 비정상, 비압축성 점성 유동방정식을 일반 곡선 운동좌표계에서 수치적인 방법으로 해석하였다. 수치 방정식은 일반적으로 그 특성이 잘 알려진 SIMPLE 방법으로 해석하였다. 해석된 결과는 오리피스를 지나는 정상유동에 대한 실험 유량계수와 비교함으로서 점검하였다. 두 가지의 동역학적 문제에 대하여 계산하여 실제 낙하시험 결과와 비교하였다. 모든 경우에 합리적인 결과들를 얻을 수 있었다. In this study, the flow characteristics of hydraulic oil in the shock absorber of aircraft landing gear is analyzed using numerical method for the unsteady incompressible Navier-Stokes equations in generalized moving coordinates. The discrete equations are solved by the SIMPLE method. The results are validated by comparing the discharge coefficient of an orifice with experimental results for the steady flow through it. two dynamical cases are computed and compared with an actual landing gear drop test. The obtained results are reasonable in all cases.

여중생들의 신체조성과 심폐기능 및 심박수 회복율에 관한 비교 연구 : 비만 여중생과 정상 여중생을 중심으로

김태운,신군수,김종인,이광무,김성헌,안병철,고기준,한재웅,이재규 釜山大學校 附設 體育科學硏究所 1996 體育科學硏究所 論文集 Vol.12 No.-

The purpose of this study was to compare and analyze the relation between body composition, cardiorespiratory functions and percent heart rate recovery in obese and normal middle school female students. We used total of 12 middle school female students(3rd grade) as subject and devided them into two groups : The measurement items of cardiorespiratory functions were HR, VE, RQ, VO₂, VCO₂, VO₂/kg, O₂pulse, VE/VO₂, VE/VCO₂, before and after treadmill exercise load. The statistical analysis were M±SD and t-test for groups(α=.05) using ?? statistical package. The conclusion of this study was as follows ; 1. In 5 items(FM, LBM, %Fat, TBW, BMI) all of body composition, obese group has been significantly higher than normal group(P<0.01). 2. In heart rate and VO₂ of resting(before exercise loads) cardiorespiratory functions, normal group has been significantly higher than obese group(P<0.05). 3. In VEmax of cardiorespiratory functions after exercise loads, obese group has been significantly higher than normal group(P<0.05), and in VO₂max, obese group has been significantly higher than normal group(P<0.01). 4. In 1, 3, 5 minute percent recovery all of percent heart rate recovery after exercise loads, normal group has been higher than obese group but there was no statistical significant difference.

취학전 아동들의 체격 및 기초체력에 관한 비교 연구

김태운,안병철,고기준,한재웅,이재규 釜山大學校 附設 體育科學硏究所 1997 體育科學硏究所 論文集 Vol.13 No.-

The purpose of the present investigation was to compare and analyze the physique and physical fitness for children(boys:876, girls:784, age: 7 yrs), and to correlation between physique and physical fitness 5 items. The measurement items of physique and physical fitness were height, weight and sitting trunk flexion, 50M run, standing long jump, foot balance, flexed arm hang test. The statistical analysis were calculated to mean and standard deviation for all measurement values and correlation coefficients between physique and physical fitness 5 items for children using SPSS/PC+ statistical package(α=.05). The conclusion of the present investigation was as follows; 1. Physique 1) In height, boys(118.31 ±23.92cm) has been significantly higher than girls(116.11 ±4.72cm)(P<0.05). 2) In weight, boys(22.31 ±3.54kg) has been significantly higher than girls(21.17 ±3.31kg)(P<0.01). 2. Physical fitness 1) In sitting trunk flexion, girls(11.67 ±4.37cm) has been significantly higher than boys(9.97 ±4.48cm)(P<0.01). 2) In 50M run, boys(12.58 ±1.30sec) has been significantly faster than girls(13.30 ±1.59sec)(P<0.01). 3) In standing long jump, boys(112.99 ±16.36cm) has been significantly higher than girls(98.94 ±16.24cm)(P<0.01). 4) In foot balance, girls(30.90 ±19.66sec) has been significantly higher than boys(26.65 ±19.25sec)(P<0.01). 5) In flexed arm hang, boys(8.68 ±7.94sec) and girls(8.58 ±8.11sec) had no significant difference. 3. Correlation between physique and physique and physical fitness 1) In correlation between height and physical fitness, boys were no little correlation in 5 items all, and girls and total were significantly low correlation(P<0.01) between height and 50M run, standing long jump. 2) In correlation between weight and physical fitness, boys and girls all were significantly low correlation between weight and standing long jump(P<0.05), flexed arm hang(P<0.01), and total were significantly low correlation between weight and 50M run(P<0.05), standing long jump(P<0.01), flexed arm hang(P<0.01).

호텔건축물의 방화(防火) 대책에 관한 연구

김기옥,이영재,이시웅 大田産業大學校 2000 한밭대학교 논문집 Vol.17 No.1

On the basis of the research and survey on the hotel, I suggested in this paper the comprehensive to secure safety from a fire in hotel in the following areas : fire prevention, escape from a fire, fire-fighting devices, and fire-prevention management. First, in architectural planning and design, more reliable plan should be made for fire door and anti-smoke around the stairs. Second, in escape plan, it should be designed that we can refuge to the 2 directions. And we should make the middle floor for refuge from a fire which an aerial truck can reach easily. Third, in fire-protection devices, Automatic Fire Alarm Systems must be maintained under the synthetic system. Fourth, in fire-prevention management, the residents and managing officers in hotel must have developed the abilities to cope with a fire.

합성피혁제조업체 근로자들에 있어서 N-methylformamide 배설속도에 관한 연구

김기웅,최병순,강성규,문영한 大韓産業醫學會 1999 대한직업환경의학회지 Vol.11 No.1

This study was conducted to examine the excretion rate of dimethylformamide(DMF) from the workers exposed to DMF. The study was done at two synthetic leather factories located in Kyeonggi-do from the period of May 2 to 30, 1996. N-methyl-formamide (NMF) concentrations in urine were measured and compared by the three exposure level of DMF in air. The mean concentration of the Low (dry and winder part), Moderate (rinsing part) and High (mixing and coating part) exposure group were 3.99±3.54, 10.19±5.69 and 32.10±7.87㎎/㎥ during workshift of 8 hours, respectively. The mean concentration of urinary N-methylformamide (NMF) were 2.13±2.58, 11.16±4.98 and 26.24±7.35㎎/g creatinine, respectively. The concentration of NMF in urine could reach to maximum in 3 hours and was reduced nearly to zero in about 18 hours after exposure to DMF.

유전자 알고리즘을 이용한 타원 검출

김향태,박찬란,이웅기 조선대학교 통계연구소 1999 統計硏究所論文誌 Vol.1 No.1

본 논문은 농도화상에서 타원을 검출할 수 있는 알고리즘을 새롭게 제안한다. 알고리즘은 먼저 초기 화상에서 윤곽선을 검출한 후 윤곽선에서 타원을 만들 수 있는 가능한 후보를 선별해 낸다. 제안된 알고리즘에서 타원이란 세 점을 이용해서 윤곽선을 정의한다. 뿐만 아니라 유전자 알고리즘을 이용해서 화상에 가장 적합도가 높은 세 점의 윤곽선을 찾는 알고리즘을 제안한다. 또한 초기 화상을 사용해서 제안된 알고리즘의 성능을 평가한다. We present a new algorithm to detect ellipses in an intensity image. The algorithm first extracts line support regions from the original image. Next, candidates for elliptic arcs are selected from these line support regions. In the proposed algorithm, each ellipse is defined by triplet of line support regions, And, using a genetic algorithm, the proposed algorithm searches for triplets of line support regions that have highest fitness to the image. By experiments using original images, we estimate the performance of the proposed algorithm.

Trichloroethyene 처리한 흰쥐의 이물질 대사효소의 활성도에 관한 연구

김기웅,강성규,최병순,이종성,김종성,문영한 大韓産業醫學會 1994 대한직업환경의학회지 Vol.6 No.2

Trichloroethylene(TRI) is one of the most widely used organic solvent in many industries. It is used a degreasing agent, extract and dillution solvents. TRI is metabolized by liver microsomal cytochrome P450 to reactive intermediates, which are considered responsible for its hepatotoxicity. Cytochrome P450 is a key enzyme in the first step of TRI metabolism resulting in chloral hydrate(CH) formation, which is a rate-limiting step in TRI metalbolism. This study was performed to find change of hepatic cytochrome P$%) levels and of electron transport system for P-450 dependent reaction. Injections of TRI were done to the male Sprague Dawley rats(mean body wights, 170±10g) in corn the dosage of 150,300,600 ㎎/㎏ for 2 days. The results of experiments are following: 1. The contents of microsomal protein, cytochrome P450 and b5 are tended to be decreased with increasing amount of TRI, but not signifcantlly(p>0.05). 2. The activity of NADPH-cytochrome P450 reductase is slowly decreased by increasing amount of TRI, but not significantlly(p>0.05). On the other hand, the activity of NADH-b5 reductase is increased with increasing amount of TRI(p<0.05). 3. The activity of 7-ethoxyresolufin O-deethylase did not show any critical changes(P>0.05). This result suggests that the inductive pattern of TRI may not be related to P 450IA1 and P450IIB.