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Ballistic Range 로부터 발사되는 초음속 Projectile 측정
권오형(Oh Hyung Kwon),이중근(Jung Keun Lee),김희동(Heuy Dong Kim) 대한기계학회 2010 대한기계학회 춘추학술대회 Vol.2010 No.11
Two-stage light-gas gun have a large number of applications in various fields of engineering. A two-stage light-gas gun can produce an extremely high pressure in a very short interval of time. In general, the two-stage light-gas gun is made up of a high pressure tube, a compression tube and a launch tube, each stage being separated by diaphragms. This can be employed efficiently in the application of ultra-high pressure liquid jets. In the present study, experiments are carried out to investigate the projectile velocity and visualization of the flow around the projectile. As a result, the projectile velocity increased from 333 ㎧ to 909 ㎧ and the flow around of projectile was visualized using a nano-sparcle schlieren optical method.
강종진 ( Kang Jong Jean ),주종우 ( Joo Jong Woo ),김대욱 ( Kim Dae Wook ),김민웅 ( Kim Min Ung ),권오형 ( Kwon Oh Hyung ),이용환 ( Lee Yong Hwan ) 한국사진학회 2017 AURA Vol.0 No.38
The photography has passed through the era of analog silver halide film and has entered the era of digital photography. Photographs have been faithfully used for about 170 years as information records, proofs, arts and personal play tools. The development of digital photography is further expanding the scope of photography and their industry. Photography plays a role in various industries that will lead the future such as 3D printing, drones, image big data. Tens of millions of photographs are continuously being recorded and transferred to big data, making information. However, legal and administrative support for photography industry in Korea is very scarce. Already in November 2015, a lawmaker for Park Maong-woo proposed a bill to promote the photographic industry. In this situation, the financing of the photo promotion law is urgent for qualitative and quantitative growth of photography industry and contents. This study examines various cases related to the promotion law in other fields, and it is a study that discusses the legislative discussion on photography industry promotion based on the theoretical basis. Based on the main contents of this law, Korea should make photographic industry promotion law for the development of the photographic industry and prepare a bridgehead for the huge image industry of the future.