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3차원 영상복원을 통한 모듈러 유닛의 비틀림 각 측정방법
지형진(Ji, Hyeong-Jin),김구연(Kim, Gu-youn),김홍진(Kim, Hong-Jin) 대한건축학회 2020 대한건축학회논문집 Vol.36 No.7
This paper reviews a method of measuring the tilted of horizontal angle of modular unit roof that occurs during fabrication and site assembly phase using three-dimensional restoration image process. Checkerboard patterns were used for camera calibration, and image analysis performed 3D reconstruction by locating the center coordinates of the circular target. A miniature model experiment was conducted before it was applied to the actual modular unit. The experiment measured the target at a distance of 300mm, 400mm, 500mm for the eight tilted angles of 0.5°, 1°, 1.5°, 2°, 3°, 5°, 7° and 10°, depending on the quantity (4,8,16,32,64,128 sheets) and distribution of concentration and distribution of the image data used for camera calibration. In sections with a tilted angle of 4 degrees or less, the error of the measurement angle using the concentrated image data was less than the error of the measurement angle using the dispersed image data. The result of the target at a distance of 400 mm, 500 mm, excluding 300 mm, showed a small error at a tilted angle of less than 3 degrees. The result of 300mm distance showed very large errors due to distortion of circular targets. Errors were reduced by the number of images for camera calibration, and the quantity of image data used for camera calibration from 32 sheets did not significantly affect the error.
콩 재배 시 크림손클로버, 헤어리벳치, 호밀 예취물 피복이 잡초 발생과 콩 생육 및 수량에 미치는 영향
이지현(Ji Hyun Lee),이병모(Byung Mo Lee),심상인(Sang In Shim),이연(Youn Lee),지형진(Hyeong Jin Jee) 韓國雜草學會 2011 Weed&Turfgrass Science Vol.31 No.2
본 연구는 콩 재배시 동계 피복작물인 크림손클로버, 헤어리벳치, 호밀의 예취물 피복이 잡초발생과 콩생육 및 수량에 미치는 영향을 알아보고자 실시되었다. 연구결과 크림손클로버, 호밀, 헤어리벳치 피복구에서 모두 이른 봄 잡초 억제율이 높았으며, 콩 정식 64일 후에도 헤어리벳치 피복구는 87.6%, 호밀 피복구는 72.0%로 콩의 초관이 형성될 때까지 높은 잡초억제율이 유지되었다. 그러나 크림손클로버 피복구는 시간에 흐름에 따라 잡초억제율 감소이 커서 여름잡초가 많이 발생한 콩 정식 64일 후에는 4/1%로 현저하게 감소되었다. 헤어리벳치 피복구는 월년생과 다년생잡초에 대한 억제율이 57.6%인 반면, 화본과잡초 억제율은 93.8%로 광엽잡초 보다 화본과 잡초에 대한 억제 효과가 높았다. 크림손클로버 피복구에서는 다년생과 월년생잡초 억제효과가 거의 없었으며, 광엽잡초에 대한 억제효과도 없었다. 콩의 후기 영양생장기에 초장을 조사한 결과 무피복에 비해 크림손클로버, 헤어리벳치, 비닐 피복구에서 각각 6.9%, 20.2%, 22.0% 초장이 더 길었으나, 호밀 피복구는 오히려 초장이 짧았다. 콩의 입비대시에는 호밀 피복구의 콩 생육이 다소 회복이 되었으며, 수확기 때 콩 수량은 헤어리벳치 피복구 ≒ 비닐 피복구 〉크림손클로버 피복구 ≒ 호밀 피복구 〉무피복구 순이었다. Weed control using cover crops has advantages of agricultural and environmental aspects which prevent soil erosion, nitrogen supply, improving soil physical properties, reduction of nitrate leaching, organic supply and control of weed occurrence. In this study, we evaluated the inhibitory effects of cover crops on the weed occurrence, growth and yield of soybean in cover crop-soybean cropping system. The treatments were consisted of 4 different mulching system such as crimson clover (Trifolium incarnatum) residue, hairy vetch (Vicia villosa) residue, rye (Secale cereale) residue and Polyethylene plastic(P.E.) mulch with no mulch treatment (control). Three cover crops were grown throughout the winter and were cut in next spring. And then 13 days old soybean seedlings were transplanted in each treatment field on 4th June. Crimson clover, hairy vetch and rye mulch treatments reduced weeds density compared to control (73.0%, 98.0% and 85.3% respectively), on 26th May. However, weed inhibition rate of crimson clover mulch treatment was sharply decreased to 4.17% on 6th August, while hairy vetch and rye mulch treatments were continued high weed inhibition rate with 87.6% and 72.0% respectively. There was no inhibition effect of perennial, winter annual and broadleaf weeds inhibition in crimson clover mulch treatment. Height of soybean in crimson clover, hairy vetch and P.E. mulch treatment was 6.9%, 20.2% and 22.0% higher than that of control. But height of soybean in rye mulch treatment was lower than control on 13th July. At harvesting, yields of soybean were in order of hairy vetch mulch treatment≒ P.E. mulch treatment>crimson clover mulch treatment ≒ rye mulch treatment>control.
호밀 리빙멀치, 토양환원, 예취처리가 유기농 콩밭 잡초 발생에 미치는 영향
이병모(Byung Mo Lee),이지현(Ji Hyun Lee),오영주(Young Ju Oh),이상범(Sang Bum Lee),강충길(Chung Kil Kang),지형진(Hyeong Jin Jee),이종형(Jong Hyung Lee) 韓國雜草學會 2010 Weed&Turfgrass Science Vol.30 No.2
유기농 콩 재배에 가장 문제가 되는 잡초를 억제하기 위하여 호밀을 피복작물로 이용하여 콩을 재배하였다. 호밀의 이용방법에 따른 잡초 억제 효과를 보기 위하여 리빙멀치(living mulch), 토양 환원, 호밀 예취구를 두었고, 콩의 재식밀도와 호밀 파종밀도를 다르게 처리하여 잡초의 발생 양상을 비교하였다. 호밀을 리빙멀치로 이용한 처리구가 잡초의 발생과 생 육을 가장 효과적으로 억제하였다. 콩 파종 한달 후의 잡초 억제율은 리빙멀치구가 92.5%에 달하였으며 15일 예취구가 75.4%, 토양 환원구가 67.1%, 30일 예취구가 61.3%에 달하였다. 호밀의 파종 밀도에 따른 효과는 처리구간 차이가 미미하였으나 콩 생육 후기에는 호밀 2줄 파종이 호밀 1줄 파종보다 다소 우수하였다. 콩 재식거리에 따른 효과도 호밀 파종 밀도의 결과와 비슷하여 밀식과 소식간 차이가 인정되지 않았다. In organic agriculture, cover crops are used for weed control. Cover crops inhibited weed germination or growth by allelopathy or shading effects. In this study, we used rye as cover crop to control weed in organic soybean field. The main treatment was rye using method such as living mulch, incorporating and mowing. Sub-treatment was rye planting density and soybean planting density. One month after soybean sowing, weed emergency and growth had been highly suppressed by rye in all treatments. Living mulch treatment was the best effective way to control the weed about 92%, and mowing treatment was the second about 75% compare to control. The weed control efficiency between rye planting densities was similar during one month. Soybean planting density treatment was same result as rye planting density. As a result of this experiment, we recommend rye as living mulch in one row planting.
임계결손된 토끼 요골에서 인체 유래 탈회골기질의 골치유 효과
김종민 ( Jong Min Kim ),( Jun Sik Son ),채희열 ( Hee Youl Chai ),지형진 ( Hyeong Jin Ji ),김대중 ( Dae Joong Kim ),강성수 ( Seong Soo Kang ),김근형 ( Gon Hyung Kim ),최석화 ( Seok Hwa Choi ) 한국조직공학과 재생의학회 2011 조직공학과 재생의학 Vol.8 No.2s
This study was designed to evaluate the effect of pure demineralized cortical bone source (CBS), and CBS and non-demineralized cancellous bone sources (CCBS) on bone healing process. Twenty-one male New Zealand White rabbits were used in this study. The rabbits were anesthetized with zoletil (15 mg/kg, IM) and xylazine (5 mg/kg, IM). An osteoperisteal segmental defect was created on the middle portion of three times as long as the diameter of the diaphysis for creation of critical-sized defect. Rabbits received bilateral segmental radial defect of 15 mm. The created defects were filled in rabbits with human-drived deminerallized bone matrixes (DBM) such as CBS and CCBS. Evaluation consisted of radiographs after surgery and sacrifice, three-dimensional micro-computed tomography (micro-CT) and histopathology. Complications after implantation with CBS and CCBS were not identified. Comparison of the scoring of the radiographs or micro-CT images revealed no significant difference in defect bridging between CBS and CCBS. Bone remodeling of critical-sized radial bone defect was completed at 13 weeks after DBM implantation. In conclusion, the results of this study indicate that DBM may be used in clinical trials for healing of bone defect.
YHB216 의 비글개에서 정맥내 단회 및 4 주 반복투여독성시험
장호송(Hu Song Zhang),정은용(Eun Yong Jung),신지순(Ji Soon Sin),안경규(Kyoung Kyu Ahn),최연식(Yeon Shik Choi),강종구(Jong Koo Kang),노용우(Yong Woo Roh),지형진(Hyeong Jin Ji),강민정(Min Joung Kang),이종욱(Jong Wook Lee) 한국응용약물학회 2002 Biomolecules & Therapeutics(구 응용약물학회지) Vol.10 No.1
N/A Recently, recombinant human erythropoietin (rHu-EPO) has been used to treat various types of anemia. YHB216 is a new rHu-EPO developed by Yuhan Research Institute. In this study, we investigated the single dose and 4-week repeated dose toxicity of YHB216 in Beagle dogs. In the single dose toxicity study, YHB216 was administered intravenously at single dose levels of 0 and 25,000 IU/㎏ to dogs (2 dogs/sex/ group). There were no treatment-related changes in survivals, clinical signs, body weight gain, hematological values, blood chemical values, and necropsy finding during experimental period. In the repeated dose toxicity study, YHB216 was administered intravenously to dogs for 4 weeks at the dose levels of 0, 100, 500, and 2,500 IU/㎏ (3 dogs/sex/group). There were no toxicologically significant changes in clinical signs, body weights, food and water consumptions, ophthalmoscopy, urinalysis and blood chemistry. There were increased values of red blood cell, hemoglobin, and hematocrit at all treated groups. Spleen revealed increased weight and extramedullary hematopoiesis at 500 IU/㎏ or more. These changes are all considered to be pharmacology-related effects and were recovered after 4-week recovery period. From these results, it is concluded that LD_50 value was above 25,000 IU/㎏ in the single dose toxicity study of YHB216 in dogs and the no observed adverse effect level (NOAEL) was 100 IU/㎏/day in the repeated dose toxicity study of YHB216 in dogs.
백민경(Min-Kyoung Paik),심창기(Chang-Ki Shim),이제봉(Je-Bong Lee),오진아(Jin-Ah Oh),정미혜(Mi-Hye Jeong),김두호(Doo-Ho Kim),김민정(Min-Jeong Kim),지형진(Hyeong-Jin Jee),최은지(Eun-Ji Choi),조현조(Hyeon-Jo Cho) 한국농약과학회 2012 농약과학회지 Vol.16 No.4
Loess-sulfur complex has been widely used as an environmental friendly organic materials for insecticides and fungicides in crop cultivation. However, there are high concerns about skin and eye irritation for farm workers due to the high alkaline properties of loess-sulfur complex. The acute toxicity evaluation was conducted with three samples of loess-sulfur complex in different pH (pH 9, 10, 11) in order to supply the evidentiary data for selecting the optimal product among the test materials. The results of acute oral toxicity using rats showed LD<sub>50</sub> of over 2,000 mg/kg b.w. for all three samples of loess-sulfur complex. The calculated acute dermal LD<sub>50</sub> of all tested materials was over 4,000 mg/kg b.w.. The Skin and eye irritation indicated that all tested materials have no irritation. Consequently, it was suggested that loess-sulfur complex be low in acute toxicity at all different pH values (pH 9~11).
Chlorella vulgaris CHK0008 시비가 유기농 딸기와 엽채소의 저장성과 신선도 향상에 미치는 영향
김민정(Min-Jeong Kim),심창기(Chang-Ki Shim),김용기(Yong-Ki Kim),박종호(Jong-Ho Park),홍성준(Sung-Jun Hong),지형진(Hyeong-Jin Ji),한은정(Eun-Jung Han),윤종철(Jung-Chul Yoon) 한국원예학회 2014 원예과학기술지 Vol.32 No.6
This study aimed to enhance storage and freshness of strawberry fruits and foliage vegetables by spray treatment with Chlorella vulgaris as a bio-fertilizer. The tested strain, C. vulgaris CHK0008, was isolated from an organically cultivated rice paddy and identified as C. vulgaris by its morphology and 18S rDNA and 23S rDNA sequence homology. We successfully cultured C. vulgaris CHK0008 in BG11 modified medium (BG11MM) and adjusted 2.15 × 10? cell/㎖ C. vulgaris CHK0008 to one OD value by measuring the optical density at 680 ㎚ using a UV-vis spectrophotometer. The soluble solid content of ‘Seolhyang’ and ‘Yukbo’ strawberry fruits treated by spray application with C. vulgaris CHK0008 was enhanced by 22.2% and 11.5% respectively, compared to untreated controls. Additionally, the decay rates of treated ‘Seolhyang’ and ‘Yukbo’ strawberry fruits decreased 63.8% and 74.4% respectively, compared to untreated control. Surface color changes and chlorosis of leaves in leaf vegetables such as lettuce, kale, red ornamental kale, white ornamental kale and beet were observed in samples treated with water spray for 10 days after cold storage. However, the decay rate of leafy vegetables treated with foliar application of 25% C. vulgaris CHK0008 liquid culture was significantly decreased compared to that of the untreated control during storage at 4℃.