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金熙鍾,柳又秀,金佳鉉,申東守,韓健模,全裕燦 東亞大學校 大學院 1984 大學院論文集 Vol.9 No.-
This paper is a study on relation between run-off ratio and antecedent discharge, run-off ratio and antecedent discharge per unit area, antecedent discharge and antecedent precipitation, by the data from the five major river basins in Korea and the small river basins in Pusan. The Nak-Dong rivers(An-Dong upper stream) f=0.4780+0.0124 ln qA r=0.99 qA=0.3368e0.1101R r=0.99 f=0.5793+0.0146 ln(qA/A) r=0.99 The Nak-Dong rivers except Ga-song station f=0.2017-0.0840 ln qA r=0.75 f=0.7012+0.0750 ln(aA/A) r=0.71 The Han rivers f=-0.0035+01267 on qA r=0.75 f=1.1311+0.1263 ln(qA/A) r=0.71 L=302.9064-43.8490 ln qA r=0.84 The Geun rivers(Mu-sin Cheon) f=0.295+0.1823 ln qA r=0.93 f=0.8417+0.1823 ln(qA/A) r=0.93 L=40.0456+62.0346 ln qA r=0.94 The Yeong-san rivers f=0.3766+0.0598 ln qA r=0.79 f=0.8084+0.0599 ln(qA/A) r=0.79 The Seom-jin rivers f=-1.3875+0.6505 ln qA r=0.92 f=2.1633+0.3465 ln(qA/A) r=0.76 Small river basin in Pusan f=0.3635+0.1120 ln qA r=0.87
유동호,김형아,허용,성재혁,이한기,박용규 한국산업위생학회 2003 한국산업보건학회지 Vol.13 No.1
The aim of this study was to evaluate exposure to dust and endotoxin produced while working at swine confinement buildings. The dusts and endotoxin may cause adverse health effects on humans. Fourteen swine farms located at Yong-In, I-Cheon and Yeo-Ju of onggi-do were investigated. Husbandry workers form the farms were requested to wear personal sampler to measure respirable dust levels. Area samplings for total and respirable dust were also conducted at swine confinements buildings by season (summer under window open, winter under window close.) Gravimetric analyses and Limulus Amebocyte Lysate assay for measu- rement of dust level and endotoxin, respectively. The highest geometric mean (GM) concentration of airbome dusts was 7.47mg/㎡ for area respirable dust. and 10.35mg/㎡ for personal respirable dust. For respirable dust levels, seven farmers exceeded level of ACGIH, 3mg/㎥. The highest GM of endo- toxin was 5745.40 EU/㎥ for personal respirable dust. Significantly increased level of total dust (p〈0.001) and endotoxin in area total dust was observe with winter samples compared with those of summer. Area total dust and area respirable dust (r-0.622, p〈0.0001) was very significantly correlated in winter. Swine husbandry worker may have a considerable risk of ill health whenexposed to level of dust or endotoxin demonstrated at this study.
한국산 붕어(Carassius auratus)의 초기생활사
한경호,진동수,유동재,백승록,황동식 여수대학교 2001 論文集 Vol.16 No.-
The egg development and morphological development of larvae and juveniles of crucian carp, Carassius auratus (Linnaeus) caught at Bosung River, Chollanam-do, in April to June, 1999 were investigated in the laboratory, Yosu National University. In the spawning season, the nuptial organ was appeared on the opercular region and under region of eye, pectoral fin, ventral fin and lateral line. The egg was transparent of yellowish brown color, demersal of adhesive and sperical in shape, measuring 1.49∼1.63㎜ (mean 1.57㎜, n=50) in diameter. The first hatching was occured in 75 hours 10 minutes after fertilization in water temperature 18.3∼21.7℃. Newly hatched larvae attained mean 4.28㎜ had a big yolk sac and their mouth, and anus were not opened yet. At 5 days after hatching, the larvae attained mean 5.34㎜ and the yolk sac was almost absorded. At 13 days after hatching, the larvae attained mean 7.21㎜. The caudal notocord was flexed 45°upward, and they reached post larvae stage. At 31 days after hatching, the larvae, mean 14.68㎜ in TL reached the juvenile stage with all of the fins formed with complete set of the fin rays (D. ⅩII-11∼15; A. Ⅲ-5∼6; P. 15∼16; V. 1-8).
한동숭,유흥상 한국학교수학회 2001 韓國學校數學會論文集 Vol.4 No.2
Since the computer is becoming more and more indispensible tool in every fields of the modern society, it is needed and desirable to utilize the computer as a basic tool from the very early stage of the education process. Recently Maple is gaining its popularity as a comprehensive mathematical software with its power of symbolic calculations and graphics as well as its great numerical computational ability. We demonstrate the suitability of this software as a tool for the mathematical education and presents several examples of the applications of Maple. For the middle and the high school mathematics courses, we give the application examples for the quadratic functions and their graphs, statistics, the three dimensional shapes, algebraic problems. Through the examples, we confirm that mathematical education can be much more effective and simple by using Maple. If we establish computer-assisted mathematical classes, we can draw more attention and excitement from the attendants than traditional classes and eventually improve more rapidly their problem-solving ability. On the other hand, the excess of the computer-aided education give to obstacle of psychological, not to be passing over the fact.
유소영,박찬영,정석,김동익,이병붕,허세호,한동철,장준근 대한혈관외과학회 2002 Vascular Specialist International Vol.18 No.2
Purpose: The spreading, orientation, and chemotaxis the gradient of a chemoattractant of smooth muscle cells (SMCs) were studied on the micro-grooved substrata by the light, fluorescence and scanning electron microscopy. Method: Vertical-walled grooves were produced in silicon wafers by the micromachining technique. All grooves were 4~20㎛ deep and 10~80㎛ wide, SMCs were cultured on each microgroove and examined under stereo-microscope. Result: Cell clusters were markedly oriented by all the grooved substrata examined. Tim-lapse images acquired from CCD (Charge Coupled Device) showed that the grooves directed the migration of SMCs. There was no prominent difference in the migration speed of SMCs according to the grooves. All the cytoskeletal fibers were reoragnized in the same direction with grooves. Especially the alignments of microtubule and intermediate filaments were distinguished in the SMCs on the micro grooves. Conclusion: These results could be applied to the analysis of vascular restenosis and the development of artificial blood vessels.
Calix[6]arene 유도체를 이용한 물속에 녹아있는 중금속 이온의 제거 효율성 연구
한승완,박유미,성대동,김상열 동아대학교 환경문제연구소 1992 硏究報告 Vol.15 No.1
The removal effectiveness of various heavy metal ions in aqueous solutions has been studied by means of spectroscopic and pH method. Treatment of calix[6]arene-p-hexa-sulfonate and O-n-hexa[6]arene-p-sulfonate to heavy metal ion solutions showed a good result to remove the big size atomic radii of the heavy metal. Stability constants were depended on the variation of pH likely to show the absorbance is higher at pH 8~10 region.
Aspergillus nidulans 에서 nsdD 유전자의 cDNA 클로닝
한갑훈,한유정,한동민 원광대학교 생명공학연구소 1995 생명공학연구소보 Vol.3 No.1
In Aspergillus nidulans, Never in Sexual Development(nsdD) gene is required for the early stage of sexual development. A region of the A. nidulans genomic DNA carrying the nsdD gene which complements NsdD19 mutation was isolated by transformation of NsdD19 mutant with a cosmid library. The size of the subcloned gene was about 4kb-long and the plasmid containing the 4kb DNA fragment, pNSD19-SB4, was cloned. 2.5kb and 2. 1kb cDNAs of nsdD gene were obtained from the sexual-development specific cDNA library by plaque hybridization and cloned into pBluescriptⅡ KS+.