Many of the structures constructed since the 1970s have begun to deteriorate. As a result, safety inspection / diagnosis and maintenance are expected to increase further, and long-term and systematic measures are urgently needed to prepare for the aging of major infrastructures. Currently, the safety inspection and maintenance of the structure is carried out by the method based on the utilization of the measurement data and the manager's experience, but the reliability and the accuracy are still insufficient. In other words, there is a limit to understanding the state change of bridges, such as abnormal behavior and gradual damages, therefore, it is necessary to have an accurate and reliable monitoring process using new techniques and systems. For this reason, I would like to examine the possibility of using cloud and big data in the field of infrastructure safety management.

To investigate the ichthyofauna and habitat type of the fish in Tamjin River system, Korea, fishes were collected with cast net (5×5 mm, 8×8 mm) and dip net (4×4 mm) at eight stations seasonally during five years from 2000 to 2004. 56 species belonging to 18 families were collected and 15 Korean endemic species(26.8%) were investigated. While Coreoperca kawamebari was occurred at every station, the number of individuals and composition were decreased. Anguilla marmorata was not collected and the exotic species didn't appeared. Dominant species were Zacco platypus(34.2%), Squalidus gracilis majimae (9.4%), Microphysogobio yaluensis(8.1%), Zacco temmincki(6.8%) and Acheilognathus lanceolatus(5.1%). The surveyed stations were clustered into 3 groups : up stream, main stream and estuary. With the cluster analysis using the relative abundance of major fishes at each habitat, fishes were separated into 5 habitat types : U (upstream type), UM (up and main stream type), M (main stream), ME (main stream and estuarine type), and E (estuarine type).

기관배양을 통한 대량증식 방법의 일환으로 액아배양을 이용한 multiple shoot 유도 조건을 조사하였다. 기내 배양 중인 식물체로부터 액아를 절취하여 TDZ와 BA를 각각 농도 별로 첨가한 MS배지와 1/2 MS배지에서 6주간 배양한 결과, MS기본배지에 0.005 mg·L-1 TDZ가 첨가된 처리구에서 효과가 가장 양호하였다. 한편 발생된 신초를 1 mg·L-1 GA3와 0.5 mg·L-1 IBA가 첨가된 1/2 MS배지에 배양했을 때 뿌리의 발생과 신장이 가장 양호하였다. 발근된 식물체를 포트에서 순화시켜 온실로 이식하였을 때 90%에 가까운 생존율을 보였으며 형태적인 변이 없이 생장하였다. 이상의 결과는 액아유도를 통한 대량번식의 가능성을 제시한다.