• 한국물환경학회지
• /
• 제25권1호
• /
• pp.58-68
• /
• 2009

Low impact development (LID) technique is relatively new concept to reduce surface runoff and pollutant loading from land cover by attempting to match predevelopment condition with various integrated management practices (IMPs). In this study, computational model for designing and evaluating LID, named LIDMOD, was developed based on SCS-CN method and applied at Andong bus terminal to evaluate LID applicapability and design retention/detention area for volume or peak flow control. LIDMOD simulated with 21 years simulation period that yearly surface runoff by post-development without LID was significantly higher than that with LID showing about 2.8 times and LID could reduce efficiently yearly surface runoff with 75% reduction of increased runoff by conventional post development. LIDMOD designed detention area for volume/peak flow control with 20.2% of total area by hybrid design. LID can also efficiently reduce pollutant load from land cover. Pollutant loads from post-development without LID was much higher than those from pre-development with showing 37 times for BOD, 2 times for TN, and 9 times for TP. Pollutant loads from post-development with LID represented about 57% of those without LID. Increasing groundwater recharge reducing cooling and heating fee, creating green refuge at building area can be considered as additional benefits of LID. At the point of reducing runoff and pollutant load, LID might be important technique for Korean TMDL and LIDMOD can be useful tool to calculate unit load for the case of LID application.

• 한국정밀공학회:학술대회논문집
• /
• 한국정밀공학회 2008년도 추계학술대회 논문집
• /
• pp.345-346
• /
• 2008

• 한국정밀공학회:학술대회논문집
• /
• 한국정밀공학회 2008년도 춘계학술대회 논문집
• /
• pp.381-382
• /
• 2008

• 한국수정란이식학회지
• /
• 제12권2호
• /
• pp.141-149
• /
• 1997

This study was carried out to investigate the effect of vitrification and slow freezing methods on the post-thaw developmental rate of rabbit zygotes. After exposing rabbit zygotes in EFS solution for 0.5, 1, 2, 3 and S min at room temperature, they were washed with 0.5 M sucrose solution, D-PBS and TCM-199 and then cultured in TCM-199 plus 10% FBS with bovine oviduct epithelial cells(BOEC) to examine whether the cryoprotectant induced injury during the various exposure periods. The embryo development rates to hatched blastocyst after exposing in EFS solution for 3 and 5 min(40.0 and 16.7%) were significantly lower than in 0.5, 1 and 2 min(63.0, 72.0 and 54.5%), respectively. The post-thaw development rates to hatched blastocyst were significantly(P<0.05) higher in in vivo morula with intact mucin coat(85.2%) and mucin seperated morula(77.8%) than those of in vitro morula(58.5%) and zygote(5.9%), hut no difference was shown between in vitro morulae and mucin separated morula. The cryoprotectant dilution procedures showed no effects on the post-thaw development rates to hatched blastocyst under the present culture conditions. The post-thaw development to hatched blastocyst in the rabbit zygotes was not significantly different between the slow freezing(12.8%) and vitrification(5.9%). These results indicated that the rabbit frozen zygotes could he successfully developed in vitro to hatched blastocysts, though their developmental rate was very low, compared with morula stage embryos, in either vitrification or slow freezing procedure under the present conditions.

• 한국컴퓨터정보학회논문지
• /
• 제26권11호
• /
• pp.183-189
• /
• 2021

이 연구는 한국형 양송이버섯 재배 배지 후발효 시스템의 개발을 통해 양송이버섯 농가의 노동력 절감, 생산 사이클 단축을 통한 농가 소득 증가를 목적으로 두고 있다. 한국형 양송이버섯 재배 배지 후발효 시스템은 국내 양송이버섯 농가의 현실을 반영하여 설계되었으며, 후발효 시스템 내의 발효 배지의 온도 차를 줄여 균일한 품질을 보장하는 양송이버섯 재배 배지를 생산할 수 있다. 또한, 성능 실험 결과 배지 후발효 시스템이 40시간의 작업 시간이 단축되었으며, 양송이버섯 배지에 도움이 되는 호기성 세균 및 방선균은 증가함을 알 수 있었으며, 양송이버섯 품질을 저하시키는 사상균은 살균됨을 확인하였다.

• Reproductive and Developmental Biology
• /
• 제30권3호
• /
• pp.175-180
• /
• 2006

본 연구는 융합 전 수핵란의 활성화 처리 유무와 활성화 처리 시간이 소 체세포유래 핵이식란의 체외 발육능에 미치는 영향을 검토하기 위해 수행하였다. 소 체외성숙란의 탈핵 후 체세포 핵을 이식하고 일부는 전기 융합 후 활성화를 유기하였고(pre-AC), 일부는 먼저 활성화 처리 후 융합을 실시(post-AC)하였다. 난자의 활성화는 $Ca^{2+}$-ionophore(A23187)로 처리 후 DMAP로 4시간 배양하는 방법으로 유기하였다. 핵이식란은 CR1aa액에서 9일간 배양하여 발육율을 검토하였으며, 활성화 후 30분${\sim}$2.5시간에 고정하여 confocal microscope하에서 핵형 변화를 검사하였다. 배반포기까지 발육율은 post-AC구(20.6%)가 pre-AC(15.3%)보다 다소 높게 나타났다. 또한 활성화 처리를 하여 핵이식란의 배 발달을 비교한 결과 post-AC구가 더 늦은 배 발달 속도를 나타내었다. Post-AC구를 활성화 후 30분, 2시간, 4시간으로 나누어 융합하여 발육율을 검토한 결과 발육율에 차이가 없었다. 본 연구의 결과는 수핵란의 활성화 시간에 따라 핵이식란의 발육 및 핵형이 영향을 받을 수 있음을 시사한다.

• 한국소성가공학회:학술대회논문집
• /
• 한국소성가공학회 2008년도 추계학술대회 논문집
• /
• pp.341-344
• /
• 2008

Plastics is commonly used in consumer electronics because of it is high strength per unit mass and good productivity. But. using, transporting, and keeping of plastic component was happened post-deformation. As time goes by and temperature is changed, the post-deformation causes the problems of exterior design and performance. But, it is difficult to estimate the post-deformation by only thermal deformation analysis. Also, the estimation technique of the pest-deformation must be easily applied to product development and it should be reliable because development time of product is limited. In the paper. the process to predict the post deformation under cyclic thermal loadings was suggested. The process was applied to the real panel, and the deformation predicted by the analysis was compared with that of real test, which showed the possibility of applying the suggested process to predict the post deformation of plastic product under thermal loadings.

• 한국축산식품학회지
• /
• 제35권4호
• /
• pp.524-532
• /
• 2015

The objective of this study was to investigate the effects of high post-mortem temperature application on development of pale, soft, exudative (PSE) turkey meat characteristics in terms of local slaughter conditions. Within this scope, it was targeted to obtain PSE-like muscles benefiting from different post-mortem temperature applications. Immediately after slaughter, turkey Pectoralis major (n=15) muscles were kept at various post-mortem temperatures (0, 10, 20, 30, and 40℃) for 5 h. pH values of 40°C treatment were lower than four other treatments (p<0.05). L* values, drip loss, cook loss, and thawing loss of 40℃ group were higher than the other groups (p< 0.05). Napole yield of 40℃ treatment indicated that high post-mortem temperature decreases brine uptake. Protein solubility of 40℃ group was lower than 0℃ group (p<0.05). Expressible moisture did not differ between 0 and 40℃ treatments. Hardness, gumminess and chewiness of 40℃ treatment were higher than 0℃ treatment. The results of this research showed that high post-mortem temperature treatment induced development of PSE-like turkey meat, with lower pH, paler color, higher technological and storage losses, and reduced protein solubility and texture.

• Carbon letters
• /
• 제8권2호
• /
• pp.127-133
• /
• 2007

In this study, commercially available pitch-based carbon fibers of general grade were post-heat-treated using a boxtype high temperature furnace at $1800^{\circ}C$, $2000^{\circ}$, $2200^{\circ}C$, and $2400^{\circ}C$, respectively. The fundamental characteristics of each heat-treated carbon fibers were investigated in terms of chemical composition, morphology, thermal stability, X-ray diffraction, single filament tensile test, and electrical resistivity. The result showed that the fiber properties were significantly influenced by the post-heat-treatment, indicating the greater effect with increasing treatment temperature. The carbon contents, thermal stability, and tensile properties of the carbon fibers used here were further increased by the post-heat-treatment, whereas the d-spacing between graphene layers and the electrical resistivity were reduced with increasing post-heat-treatment temperature.

• 벤처창업연구
• /
• 제1권2호
• /
• pp.27-65
• /
• 2006

본 연구는 TDX 및 CDMA 등 과거 기술추격기(Catching-up)에 이루어졌던 국가연구개발사업 성공사례와 탈추격기(Post Catching-up)에 이루어진 FTTH 기술개발 사례를 비교 분석한다. 이를 통해, 추격기에서의 국가연구개발사업 성공모델이 탈추격기 상황에서 왜 효과적으로 작동하지 않은가를 규명하고 탈추격기에서 국가연구개발사업의 성공을 위한 정책적 개선방안을 제시한다. 탈추격기의 FTTH 기술개발 사례를 추격기의 TDX 및 CDMA 사례들과 비교하면, 탈추격기에는 1) 기술적 불확실성이 높고 기술표준을 설정하기 어려우며, 2) 정부 주도의 연구개발과 시장창출이 용이하지 않고, 3) 연구개발 컨소시엄 참여자들의 비전 공유가 어렵고, 그리고 4) 마케팅 능력이 취약한 중소 벤처기업들에 의해 상용화가 이루어진 점 등에서 차이가 있다. 이러한 탈추격기 국가연구개발사업의 성공을 위한 정부의 역할과 국가 차원의 기술개발 전략을 논의한다.