동복수원지 자생식물이 침수시 수질에 미치는 영향

조영관,배석진,백순기,이정전 ( Young Gwan Cho,Seok Jin Bae,Soon Ki Baik,Jung Jun Lee ) 한국물환경학회 1996 한국물환경학회지 Vol.12 No.3

When wild growing plants such as Alopecurus aegualu var. amurensis were submerged in water for experiment, the conductivity and color of the water increased to a maximum 67 times that of raw water on the edged of Dongbok reservoir. In case of withered matters of Setaria viridis, the variation of color vas small, but when withered matters of Persicaria lapathafolia - which is used for dye materials - were submerged, the increasing rate of water color was very high. The variation of concentration of phosphorus and nitrogen in growing plants such as A. aegualis var, amurensis was 4∼37times and 2.5∼10times higher than that of withered plants(S. viridis and P. lapathafolia). As for treatment method. when ashes of A. aegualis var. amurensis were submerged in water, the concentration of total nitrogen(TN) and total phosphorus(TP) decreased more than that of non-treated. On the contrary, in case of withered matter of Persicaris lapathafolia, when ashes were submerged in water, the concentration of TN and TP increased more than that of the nontreated. Total nitrogen amount from the total plant biomass in the Dongbok reservoir was 12,821㎏ and total phosphorus amount was 1,141㎏. From among them, the amount of TN and TP in Persicaria lapathafolia was larger than that of any other dominant species.

저서동물을 (底棲動物) 이용한 증암천 (甑岩川) 상류 하천의 생물학적 수질평가

조영관,박병훈,백순기,김종선,나철호 ( Young Gwan Cho,Byoung Hoon Park,Soon Ki Baik,Jong Sun Kim,Chul Ho Ra ) 한국하천호수학회 1996 생태와 환경 Vol.29 No.3

The taxa of benthic macroinvertebrates in the upper region of the Cheungam stream was composed of 76 species, 61 genus, 41 families, 13 orders, 4 classes in 3 phyla. Among them, aquatic inserts containing 71 species (93%) were the major group. According to order, Ephemeroptera containing 26 species was abundant, and Trichoptera containing 19 species, Plecoptera 13 species an? Diptera 11 species were the major taxa. The seasonal species number of collected specimens was most numerous in spring (57 species) and similar in other seasons (41∼44 species). On the one-to-one propotion, Ephemeroptera were the highest (52%), and Trichoptera was 19%, Diptera 16%, Plecoptera 9%. DOminant Species were Epeorus, Cincticostella castanea, Serratella rufa and Hydropsyche belonging to Ephemeroptera and Trichoptera. Dominant indices ranged from 0.34∼1.00. Species diversity indices showed 0.00∼3.82. According to saprobic system based on the species diversity indices, water quality was evaluated to be oligosaprobic and β-mesosaprobics. The biological water quality as in biotic and pollution indices was evaluated oligosaprobic in site 1, 2 and 6 and β-mesosaprobics in site 3, 4 and 5.

황용강수계에서의 (黃龍江水系) 저서동물의 (底棲動物) 계절적 분포와 생물학적 수질평가에 관한 연구

조영관,배석진,백순기,나철호 ( Young Gwan Cho,Seok Jin Bae,Soon Ki Baik,Chul Ho Ra ) 한국하천호수학회 1996 생태와 환경 Vol.29 No.3

The benthic macroinvertebrates in the Hwangryong river occurred 51 species, 42 genera, 26 families, 10 orders, 5 classes in 3 phyla. Among them, aquatic insects containing 44 species were the major group comparing 84.6% of the whole. In particular, a great many Ephemeroptera containing 17 species occurred and Megaloptera were found only in 2 species. Also, there were 4 species of Trichoptera. The comparison of species at each site revealed the largest number of 29 species at site 2 and 3 respectivly, and the smallest was 18 species at site 1. The seasonal number of collected species were similar, as followers; 30 species occurred in winter, 25 species in spring, 28 species in summer, and 22 species in autumn. On comparing individual numbers in this survey, Ephemeroptera were the highest (50%) and Trichoptera were 37%. The most dominant species belonged to Trichoptera and Ephemeroptera. Above all, Uracanthella rufa and Cheumatopsyche brevilineata were dominant. Dominant indices ranged from 0.46 to 0.94. Species diversity indices ranged from 1.04 to 3.00. According to the saprobic system based on the species diversity indices of benthic macroinvertebrates, water quality was β-mesosaprobic in each site. The biological water quality as biotic indices was evaluated from α- to β-mesosaprobic, the pollution indices evaluated β-mesosaprobics, the simple water quality evaluation revealed secondary water quality criteria and the GPI evaluated ranged from oligosaprobics to β-mesosaprobics. The biological water quality evaluation by these indices proved similar to the results of chemical analysis.

동복천수계에 서식하는 수서곤충의 (水棲昆蟲) 군집에 (群集) 관한 연구

조영관,백순기,김종선,나철호 ( Young Gwan Cho,Soon Ki Baik,Jong Sun Kim,Chul Ho Ra ) 한국하천호수학회 1993 생태와 환경 Vol.26 No.4

The total taxi of aquatic insects in the Tongbok stream were 78 species, 54 genera, 29 families in 8 orders. Among them, major groups were mayflies(24 species) and caddiesflies(17 species). The seasonal species number of collected specimen were similar, that is, they occurred 44 species in winter, 45 species in spring and summer respectively, and 39 species in autumn. In proportion of individuals at this surveyed stream, caddisflies were the highest(42%) and mayflies were 30%. Mostly dominant species were belonged to caddisflies and mayflies. Above all, Hydropsyche KUb and serratella rufa were dominant species. Dominant indices ranged from 0.25∼0.88. Species diversity indices showed 1.14∼4.29.

내시경점막하박리술 후 검체를 이용한 육안소견, 입체현미경소견 및 병리지도화 간의 검체 절제방향의 비교

조영관 ( Young Kwan Cho ),조주영 ( Joo Young Cho ),진소영 ( So Young Jin ),조원영 ( Won Young Cho ),정윤호 ( Yoon Ho Jung ),이태희 ( Tae Hee Lee ),김현건 ( Hyun Gun Kim ),김진오 ( Jin Oh Kim ),이준성 ( Joon Seong Lee ) 대한소화기학회 2010 대한소화기학회지 Vol.56 No.5

Background/Aims: The correct pathologic review is very important after endoscopic submucosal dissection. The cut direction of specimen should be the right angle of the closest area between the lesion and the lateral margin for the correct pathologic review. The aim of this study was to evaluate the concordance of the gross finding and stereoscopic finding compared to the pathologic mapping in the setting of the cut direction. Methods: Between December 2008 and May 2009, the objects were 48 specimens in 46 patients who were diagnosed with early gastric cancer and high grade adenoma after endoscopic submucosal dissection. The specimens were stained with hematoxylin and observed by the stereoscopy and analyzed by the image analysis system. The cut direction was divided by an angle of 45 degree based on the oral side of the specimen, and the cut directions of the gross finding, the stereoscopic finding, and the pathologic finding were compared. Results: The concordance of the gross finding in the setting of the cut direction was 68% (33/48), and the kappa value was 0.626, and the concordance of the stereoscopic finding in the setting of the cut direction was 87% (33/48), and the kappa value was 0.874. The accuracy of the gross finding was significantly lower than that of the stereoscopic finding in the setting of the cut direction (p<0.05). Conclusions: The endoscopist needs the careful observation and close attention in the setting of the cut direction of the specimen by gross finding, and stereoscopic analysis may be a useful tool for decision of the cut direction. (Korean J Gastroenterol 2010;56:293-298)

P. B. Shelley의 Adonais에 나타난 초월론적 회의주의

조영관 ( Cho Young-Kwan ) 현대영미어문학회 1991 현대영미어문학 Vol.9 No.-

Adonais is generally criticzed as a subtle and complex poem. So there has continued to be disagreement about several critical interpretations. Moreover the unity of this poem is still at issue. In this poem, the structure and various images are inseparable because of their mixture into a great one. Thus the method of its study must be focused on the whole forms of Shelley’s works. Above all, skepticism which is one of main streams of literary manifestation is thought not to be ruled out. The reason is that skepticism is at once a consistent literal philosophy and a method of poetic writing all through his works. Next, I will summarize the contents of Adonais from the skeptical point of view. Shelley, though a romantic, uniquely wrote a traditionally elegiac Adonais. But this poem shows his consistent world of works such as absurdity between reality and ideal. Alastor consists of pessimistic skepticism on life throughout, whil Adonais contains Platonic immortality and reality in the imaginative world. Shelley has a skeptical attitude toward the transcendence and immortality, the phenomenal illusion of which is based on Dream of Life principle. Moreover the ambivalence between the lamentation and silence of Keats’s death deepens his skeptical inclination. He is thought to acquire the immortality in the operation of loss and recompensation. His acquirement of the transcendental life can be said to be attributable to his skepticism. He made a delegate―Hour mourn Keats’s death, which evades a double death and gives animation to this poem. Though he feels betrayal of difference between man’s evanescence and the mutabiltiy of nature in the cyclical nature, he can unify phenomenal world with ontological reality. Through the self-portrait of man’s frail form he is convinced that a physical destruction can accomplish a mental world and has acquired a creative poetic inspiration within the form and essence of nature.

Shelley의 Alastor에 나타난 Psyche-epipsyche에 관한 연구

조영관 ( Cho Young-kwan ) 현대영미어문학회 1985 현대영미어문학 Vol.3 No.-

Shelley’s Alastor is attempting to settle a conflict between what might be called the law for nature and the law for love—that is between the material world and psychological world. But we may consider this poem to be the material world, and put emphasis on the philosophical viewpoint because of its quest towards inner being. In the process of searching for inner being, he uses variously invisible symbols beyond visible realities. He is far from being satisfied with external phenomena such as social systems, conventions, but eagerly longs for the ideal beauty beyond them. However, he is unable to cope with these environments effectively unless he is able to establish a connection with some epipsychological counterpart through whom he accomplishes his ideal beauty towards perfection. Thus he creates a Narrator, a poet as his other self through whom he intends to attain this goal. His thought can be said to be derived from Plato’s threefold division of the soul. Thus Shelley’s conception of soul in this poem is alleged to be divided as follows: (1) an immortal spirit, which controls the other two parts, is a dream-symbol. (2) a higher moral or rational soul is expressed as boat-journey and narcissim. (3) a desiring part, which guides the appetites, leads to the Poet’s death because of distorted emotion. Consequently in this poem the separation of epipsyche from psyche produces death, whether actual or symbolic. And the Psyche-Epipsyche theme can be the prototype of his late poems.

정수장 회수조 상등수 재이용에 따른 안전성 고찰

조영관(Young Gwan Cho),이대행(Dae Haeng Lee),명화봉(Hwa Bong Myung),박병훈(Byung Hoon Park),곽명규(Myung Gyu Gwak) 한국수처리학회 2001 한국수처리학회지 Vol.9 No.3

N/A The safety of water quality at several water treatment plant(WTP) in Gwang-ju was investigated when the backwashing water was reused. Concentrations of turbidity, E. coli, NH₃-N, metals in recycled water of Y-WTP were generally low under the standard limit of drinking water. However, turbidity and color of the backwashing water at N-WTP were so high that affected to the water treatment process as coagulation/sedimentation and also increased the amount of sludge in sedimentation basin. When the ratio of recycled water to raw water was increased, much alum was needed and residual turbidity in effluent of sedimentation was also increased. 15% NaCl solution was used to chase the stream characteristics of processes at N-WTP. A drift of one side was occurred because the flow rate of streams and the amount of effluents were different at two sedimentation basins.

원위위절제술 후 토혈을 동반한 공장-위 장중첩증 1예

정윤호 ( Yoon Ho Jung ),김동균 ( Dong Kyun Kim ),조영관 ( Young Kwan Cho ),조원영 ( Won Young Cho ),김진오 ( Jin Oh Kim ),조주영 ( Joo Young Cho ),이준성 ( Joon Seong Lee ) 대한소화기학회 2010 대한소화기학회지 Vol.55 No.6

Adult intussusception represents 5% of all cases of intussusception and accounts for only 1-5% intestinal obstructions. Intussusception is a rare complication after gastric surgery with an incidence estimated at 0.1%. Early diagnosis of the acute onset intussusception is critical because mortality rates increase abruptly with delay in surgical treatment. We present here a case of jejunogastric intussusception diagnosed by gastroscopy in a patient with a history of distal gastrectomy due to early gastric cancer who had experienced hematemesis. (Korean J Gastroenterol 2010;55:390-393)

직접에너지적층 공정의 UNSM 후처리를 통한 잔류응력 분포 제어와 기계적 특성변화

조영관(Y. K. Jo),유재현(J. H. Yu),조영태(Y. T. Cho),이춘만(C.-M. Lee),박상후(S. H. Park) Korean Society for Precision Engineering 2023 한국정밀공학회 학술발표대회 논문집 Vol.2023 No.5