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강기판(kang Gi Pan),조기현(Cho Kee Hyeon),정영진(Jung Young Jin) 대한기계학회 2015 대한기계학회 춘추학술대회 Vol.2015 No.11
Liquid core reduction (LCR) means the technology that upper frame of bender semgent press the solified shell of slab in the strand of caster. Thus, bender segment frame should have the sufficient strength against the pressing force. We have designed the bender segment and conducted experiments on several cases according to slab thickness. And then, we have obtained the material property of the range 900~1300℃ through the compression test in high temperature furnace. We have also done the LCR test in the pilot caster and compared with the result of compression test. And then, we have found that there is an analogy between LCR force and the compression strain curve in high temperature. As a result, we have known that the inner quality of slab is secured under the 20% over pressing condition of slab thickness.
한,일 군사전략의 추세변화 비교논의 및 함의 -한국의 "신군사전략"과 일본의 "집단적 자위권"을 중심으로-
최병학 ( Byoung Hahk Choi ),조기현 ( Gi Hyeon Cho ) 미래군사학회 2013 한국군사학논총 Vol.2 No.2
Recently, American ``Revolution (Return to Asia) to Asia`` Policy strikes Chinese expansionism through ``Anti-Access / Area - Denial (2A/2D)`` strategy. Therefore possession of Sankkaku chain of islands and selection of air defence area are getting issued. Such serious of events caused international tension around northeast asia, which includes Korea. In this situation, Abbe’ regime of Japan is calling out ``Active Pacifism`` and abolish ``An exclusively defensive security policy’s principle``. Planning Pacific constitution revision and insistencies ``The Right of Collective Self-defense``. Contrive to a ordinary country Which provides opposition of around countries and Arms Race including Korea and China. Therefore, the Japan``s ``Collective Self Defense Events and Activities`` is devising the great country of the military to influence in East Asia. So we need to discuss the problem as a strategic dimension and injustice of Japan. Our army``s ‘The Strategy of the Preemptive Right of Self-defense’ is based on UN. Each the Right of Self-defense is justice but the Japan``s ‘The strategy of Right of Collective Self-defense’ is one of the offensive strategy which effects international sociality and Korea``s Strategic confrontation logic about Japanese Collective Self Defense after discuss comparing mutually in dimension that infringe interests of marginal.
지열원 열펌프 열풍건조기와 냉풍데시칸트건조기의 감(곶감, 감말랭이) 건조비교
박승태(Seung Tae Park),조승구(Seung Gu Cho),조기현(Gi Hyeon Cho),이정호(Jeong Ho Lee),박성찬(Seong Chan Park),황보경(Gyeong Hwangbo),김영일(Yeong Il Kim),양원석(Won Seok Yang),오상민(Sang Min Oh) 대한설비공학회 2018 대한설비공학회 학술발표대회논문집 Vol.2018 No.6
This study compares the drying performance of geothermal heat pump hot-air dryer and cold-air desiccant dryer. Through the experiment, the sample condition, drying factor, dehumidification(drying) amount and power consumption were compared. For the purpose of fair comparison, the same experiment was conducted. The persimmon color is dark brown in the geothermal heat pump hot air dryer and orange in the cold air desiccant dryer. The taste and texture are almost the same. The energy efficiency of the geothermal heat pump hot air dryer was better than that of the cold desiccant dryer by about 45%.