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CT절편두께와 RP방식이 3차원 의학모델 정확도에 미치는 영향에 대한 연구
엄기두,이병도 大韓口腔顎顔面 放射線學會 2004 Imaging Science in Dentistry Vol.34 No.1
Purpose : This study was to evaluate the influence of slice thickness of computed tomography (CT) and rapid protyping (RP) type on the accuracy of 3-dimensional medical model. Materials and Methods : Transaxial CT data of human dry skull were taken from multi-detector spiral CT. Slice thickness were 1, 2, 3 and 4 mm respectively. Three-dimensional image model reconstruction using 3-D visualization medical software (V-works^(TM) 3.0) and RP model fabrications were followed. 2-RP models were 3D printing (Z402, Z Corp., Burlington, USA) and stereolithographic Apparatus model. Linear measurements of anatomical landmarks on dry skull, 3-D image model, and 2-RP models were done and compared according to slice thickness and RP model type. Results : There were relative error percentage in absolute value of 0.97, 1.98, 3.83 between linear measurements of dry skull and image models of 1, 2, 3 mm slice thickness respectively. There was relative error percentage in absolute value of 0.79 between linear measurements of dry skull and SLA model. There was relative error difference in absolute value of 2.52 between linear measurements of dry skull and 3D printing model. Conclusion : These results indicated that 3-dimensional image model of thin slice thickness and stereolithographic RP model showed relative high accuracy.
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안두환,엄기진 江原大學校 附設 體育科學硏究所 1998 江原大學校附設體育科學硏究所論文集 Vol.- No.22
Ⅰ.Preface The aims of physical education are defind as competence of physical activities. reinforcement of physical functions. knowledge of atheletics. and the interaction for social development. The evaluation of physical education os divided into three domains as follows : 1)the evaluation psycho-motor domain 2)the cognitive domain. and 3)the affective domain And it natural for me to evaluate these three domains with harmony extending over the broader scope. It is easy to evaluate the psycho-motor domain and cognitive domain because these latter domains are visible. and so can be measured correctly. But it is difficult to evaluate the students on the basis of the affective characteristics because this domain is vague in concept and includes the deliate pasychological factors. The affective domain evaluates the students' desirable attitude toward the physical performances and social attitude. which we lay more emphasis on these area than ever,. So I feel the need for making items we can evaluate the students' attitude toward physical education. So I made devies which can measure the students' attitudes toward the affective characteristics as follows : 1)To make items for measuring the students' affective domain 2)To make checklist applied for affective domain Ⅱ.Procedure 1.Making items 1)To sample the affective educational objectives which were written in the physical education curriculum and teacher's guide book. 2)To make 45items on the physical educational objectives. and then classify the objectives into 13 categories. 3)To select the behavioral traits and classsify thsese traits into 7 categories in order to express the affective behavior more clearly 4)To classify 7 behavoral traits in reference to the affective behavior 5)To classify the content of the affective behavior in order to develop the evaluation of items 6)To make items by means of the teacher's observation 2.Checklist for evalution the Affective Domain 1)To make 14 devices for bsic evaluation and giver 2 marks per items 2)To make checklist in the affective domain which can evaluate the students' affective characteristics. and then try to apply to th checklists 3)To make rating scale-degree according to guideline of Ministry of Edijucation and Kanhwon-Do Board of Education Ⅲ.Conclusion 1)I drew the affective in the field of physical performance. and selected the suitable items for the affective domain. 2)I have been able to associate the students' anmes with their features and to make rapaport with them.
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Ki, Chang Seok,Lee, Ki Hoon,Baek, Doo Hyun,Hattori, Masahiro,Um, In Chul,Ihm, Dae Woo,Park, Young Hwan Wiley Subscription Services, Inc., A Wiley Company 2007 Journal of applied polymer science Vol.105 No.3
<P>Regenerated silk fibroin (SF) filaments could be prepared by wet spinning in common solvent/coagulation system. SF was directly dissolved in mixture solvent of phosphoric acid and formic acid (20/80–30/70 ratio) and coagulated in methanol bath. The concentration and stability of SF dope solution have been studied by varying the mixture ratios of these solvents in accordance with elucidating the role of formic acid in the mixture solvent system. Morphological structure as well as crystalline structure of the regenerated filament was examined using SEM and XRD analyses. As a result of tensile test, the regenerated SF filament, which was made by one-step dissolution and coagulation process, had good mechanical properties, 2.3 gf/d tenacity and 18% breaking strain. In this study, a simple wet spinning method which enables to apply to practical production has been reported for the preparation of the regenerated SF filament. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci 2007</P>
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Metal Ion Adsorbability of Electrospun Wool Keratose/Silk Fibroin Blend Nanofiber Mats
Baek, Doo-Hyun,Ki, Chang-Seok,Um, In-Chul,Park, Young-Hwan The Korean Fiber Society 2007 Fibers and polymers Vol.8 No.3
In this study, electro spun wool keratose (WK)/silk fibroin (SF) blend nanofiber was prepared and evaluated as a heavy metal ion adsorbent which can be used in water purification field. The WK, which was a soluble fraction of oxidized wool keratin fiber. was blended with SF in formic acid. The electrospinnability was greatly improved with an increase of SF content. The structure and properties of WK/SF blend nanofibers were investigated by SEM, FTIR, DMTA and tensile test. Among various WK/SF blend ratios, 50/50 blend nanofiber showed an excellent mechanical property. It might be due to some physical interaction between SF and WK molecules although FTIR result did not show any evidence of molecular miscibility. As a result of metal ion adsorption test, WK/SF blend nanofiber mats exhibited high $Cu^{2+}$ adsorption capacity compared with ordinary wool sliver at pH 8.5. It might be due to large specific surface area of nanofiber mat as well as numerous functional groups of WK. Consequently, the WK/SF blend nanofiber mats can be a promising candidate as metal ion adsorption filter.
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Jang, Ki-Chang,Lee, Jin-Hwan,Kim, Seong-Cheol,Song, Eun-Young,Ro, Na-Young,Moon, Doo-Young,Um, Yeong-Cheol,Park, Ki-Hun The Korean Society for Applied Biological Chemistr 2007 Journal of Applied Biological Chemistry (J. Appl. Vol.50 No.1
1-C-(p-Hydroxyphenyl)-glycerol (1) was isolated and purified by column chromatography and recrystallization from the rhizome of Trichosanthes kirilowii, firstly in this species. Isolated compound showed inhibitory effects on the growth of five bacteria (Bacillus cereus, Escherichia coli, Streptococcus faecalis, etc) completely at the concentration higher than 10 ppm as well as delayed the growth of three bacteria (Bacillus substilis, Staphylococcus aureus, Pseudomonas aeroginosa) at the concentration of 25 ppm for 60 h. Moreover, this compound showed potent antioxidant activity against DPPH radical ($IC_{50}$ = 56.0 ppm)
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성기철(Ki-Cheol Seong),김천환(Chun-Hwan Kim),이진수(Jin-Soo Lee),김두섭(Doo Seob Kim),엄영철(Yeong-Cheol Um) (사)한국생물환경조절학회 2006 시설원예‧식물공장 Vol.15 No.4
단호박의 억제재배시 착과율 향상 및 유인노력 절감을 위한 한라산 중산간지(해발 600m) 육묘 효과를 검토 하였다. 정식직전 묘의 T/R율은 평지 육묘 9.5로 도장된 경향을 보였으나 중산간지 육묘에서는 5.4로 건실한 묘 생육을 보였다. 육묘 지역에 따른 1번 암꽃의 착생 위치는 평지 육묘 26.0마디에 비하여 중산간지 육묘 19.4마디로 크게 낮아졌으며 2번 암꽃 및 그 이후에 착생되는 암꽃들도 평지 육묘에 비하여 3~5마디 아래에서 착생되어 유인노력을 20% 정도 절감할 수 있었다. 2번과 착과율은 중산간지 육묘 17.2%로 평지 육묘 1.4%'에 비하여 16%정도향상 되었다. 상품수량의 경우 평지 육묘 3,500㎏/10a에 비하여 중산간지 4,460㎏/10a로 27%가 증가 하여 한라산 중산간지를 이용한 여름철 육묘 효과가 크게 나타났다. This study was carried out to determine the effect of raising seedling at Hallasan area of subalpine (altitude of 600m above sea level) to improve fruiting rate of Squash (Cucurbita maxima) in retarding culture. “Ebis” cultivar was seeded in plug tray of 32 cells and the seedlings were grown for 25 days. They were transplanted on August 26, 2004, following L-stem training method under rain-shielding condition. Seedling height, number of nodes and leaf area were higher in lowland than in sub-alpine area. T/R ratio of seedling in sub-alpine was much lower as compared with that in the lowland. The first fruiting was on the 19th node in sub-alpine area, and on the 26th node in the lowland area(control). The succeeding fruiting nodes were lower by 3 to 5 node than those of control. Fruiting rate of second flower was improved by 17.2% compared with the 1.4% in control. The marketable yield was increased by 27% by raising seedling in sub-alpine area (4,460 ㎏/10a). This also brought out 20% labour saving effect. The environmental condition for raising seedling in the sub-alpine area of Hallasan was effective for the improvement of Squash(Cucurbita maxima) fruiting rate compared with lowland area.
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제주에서 터널 피복시기가 아스파라거스의 수확기 및 수량에 미치는 영향
성기철(Ki Cheol Seong),김천환(Chun Hwan Kim),이진수(Jin Soo Lee),김두섭(Doo Seop Kim),엄영철(Yeong Cheol Um),강경희(Kyong Hee Kang) (사)한국생물환경조절학회 2007 시설원예‧식물공장 Vol.16 No.4
난지권인 제주에서 아스파라거스 수확기 및 수량에 미치는 터널피복 시기를 구멍코자 2년생 ‘그린타워’ 품종을 이용 수행하였다. 무처리를 비롯하여 터널피복시기는 2004년 1월 10일부터 15일 간격으로 2월 25일 까지 4회 실시하였다. 맹아일은 관행 3월 3일에 비하여 1월 10일과 25일 피복구에서 23주 빨랐다. 첫 수확일은 관행구(무처리) 3월 11일에 비하여 1월 10일 피복구에서는 2월 19일로 3주, 1월 25일과 2월 10일 피복구에서는 2월 25일로 2주 정도의 수확기 촉진 효과가 나타났다. 주당 수량은 1월 10일과 25일 피복구에서 가장 많았으며 피복구에서 각각 325, 333㎏/10a로 크게 나타났으며 2월 10일 피복구 이후에서는 크게 감소되었다. Optimal date to cover plastic film tunnel for hastening the harvest and increasing the yield in asparagus was studied using 2-year-old ‘Green tower’ cultivar in Jeju. Plastic film tunnel was covered on January 10 and 25, and February 10 and 25 in 2004. The asparagus spear sprouted on March 3 in the control. They emerged earlier by about 2 to 3 weeks in the plots covered on January 10 and 25 than the control. First harvesting was hastened by 3 weeks in the plots covered on January 10 and two weeks in the plots covered on January 25 and February 10 compared to the control. Yield per plant was the highest in plastic film tunnel covered on January 10 and 25. Early harvesting in February in plastic film tunnel covered on January 10 and 25 were 325 and 333 ㎏/10a respectively with no significant difference between two treatments whereas yield was low significantly in plastic film tunnel covered on February 10 and 25.
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제주에서 터널 피복시기가 아스파라거스의 수확기 및 수량에 미치는 영향
성기철(Ki Cheol Seong),김천환(Chun Hwan Kim),이진수(Jin Soo Lee),김두섭(Doo Seop Kim),엄영철(Yeong Cheol Um),강경희(Kyong Hee Kang) (사)한국생물환경조절학회 2005 시설원예‧식물공장 Vol.14 No.2
난지권인 제주에서 아스파라거스 수확기 및 수랑에 미치는 터널피복 시기를 구명코자 2년생 ‘그린타워’ 품종을 이용 수행하였다. 무처리를 비롯하여 터널피복 시기는 2004년 1월 10일부터 15일 간격으로 2월 25일 까지 4회 실시하였다. 맹아일은 관행 3월 3일에 비하여 1월 10일과 25일 피복구에서 23주 빨랐다. 첫 수확일은 관행구(무처리) 3월 11일에 비하여 1월 10일 피복구에서 2월 19일로 3주, 1월 25일과 2월 10일 피복구에서는 2월 25일로 2주 정도의 수확기 촉진 효과가 나타났다. 주당 수량은 1월 10일과 25일 피복구에서 기장 많았으며 피복시기가 늦어짐에 따라 크게 적어졌다. 터널피복에 의한 2월 조기수확 효과는 1월 10일 및 1월 25일 피복구에서 각각 325, 333㎏/10a로 크게 나타났으며 2월 10일 피복구 이후에서는 크게 감소되었다. Optimal date to cover plastic film tunnel for hastening the harvest and increasing the yield in asparagus was studied using 2-year-old 'Green tower' cultivar in Jeju. Plastic film tunnel was covered on January 10 and 25, and February 10 and 25 in 2004. The asparagus spear sprouted on March 3 in the control. They emerged earlier by about 2 to 3 weeks in the plots covered on January 10 and 25 than the control. First harvesting was hastened by 3 weeks in the plots covered on January 10 and two weeks in the plots covered on January 25 and February 10 compared to the control. Yield per plant was the highest in plastic film tunnel covered on January 10 and 25. Early harvesting in February in plastic film tunnel covered on January 10 and 25 were 325 and 333 ㎏/10a respectively with no significant difference between two treatments whereas yield was low significantly in plastic film tunnel covered on February 10 and 25.
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