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소비자 맞춤형 개념설계 및 쿠션부 충격해석을 통한 외피형 에어백 헬멧 개발
정인덕(In-Duck Jung),이용문(Yong-Moon Lee),오미옥(Mi-Ok Oh),김승철(Seung-Chul Kim),이태구(Tae-Gu Lee),강명창(MyungChang Kang) 한국기계가공학회 2016 한국기계가공학회지 Vol.15 No.6
This study was initiated to minimize head injuries, which is the largest cause of increased external activity, traffic accident injuries, and death. We developed a low cost airbag that can be covered by a safety helmet based on consumer needs. The results of the survey showed that safety is the most important aspect of consumers" safety helmets. It also predicted that increasing the weight would present the biggest problem. Curved airbag cushion parts that can be attached to a helmet and the sensor part of a block type were designed. Impact analysis was performed by specifying the pressure inside the airbag and the volume of the airbag as variables.
정인성(Jung In-Sung),이주(Lee Ju),정락교(Jung Rak-Gyo),이종우(Lee Jong-Woo) 한국철도학회 1998 한국철도학회 학술발표대회논문집 Vol.- No.-
The LIM can be used as a transport system with wheel structure. The structural tolerance cause the airgap unbalance and that effects on the LIM performance. The effect of airgap unbalance on the motor performance such as thrust force, velocity and armature current are investigated by using Finite Element Analysis (FEA). From this numerical works, it is known that the airgap unbalance almost does not effect on the motor performance and LIM for transport system is robust to the structural tolerance.
정인상,이인철,박정식,이순린 ( In Sang Chung,In Chul Lee,Jung Sig Park,Soon Lin Lee ) 한국열처리공학회 1990 熱處理工學會誌 Vol.3 No.2
Since the reverse shape memory effect(RSME) was reported in a CuZnAl alloy, further study has been done on the mechanism of this phenomenon and reported that it occurs by the bainitic transformation. But the present authors revealed in the previous work that the RSME in a B2 CuZnAl alloy is not caused by the shear process involved in the bainitic transformation and also that the RSME takes place as the remaining α`₂phase, which is two-step transformed strain induced martensite, is newly transformed into α phase. In order to provide further evidence in supporting the facts, thus, more detailed investigations have been carried out in a DO₃CuZnAl alloy.
흉부 X-Ray 검사실에서 Auto Voice Device의 유용성과 방사선사의 편의성에 관한 고찰
정인아(In-A Jung),이동희(Dong-Hee Lee),이민우(Min-Woo Lee),김순배(Sun-Bae Kim) 대한영상의학기술학회 2012 대한영상의학기술학회 논문지 Vol.2012 No.-
목적: 음성안내가 많은 흉부 X-ray 검사실에서 사용할 Auto voice device를 제작하여 장비의 유용성과 이에 따른 방사선사의 업무 편의성에 대해 알아보고자 하였다. 대상 및 방법: 2012년 01월 09일 부터 02월 24일에 걸쳐 방사선사 87명에게 검사방법과 장비사용법이 담긴 동영상을 보여준 후 연구목적과 취지를 설명하고 협조를 요청하여 설문 지를 배부하여 분석하였다. 방사선사의 일반적 특성은 성별은 남성이 58명(67.7%)으로 9 명(33.3%)인 여성의 약 2배이고, 평균연령은 36(35.89±7.90)세이며, 근무기간은 13(13.41±7.54)년, 검사건수는 300~399건이 41명(28.7%)으로 가장 많은 비중을 차지했 다. 조사결과 분석은 방사선사의 검사에 대한 일반적 견해와 개선사항과 장비의 질에 대한 견해를 파악하기 위해 빈도와 백분율을 산출하고, 검사장비도입의 효과 및 효능의 통계적 처리는 SPSS를 이용하여 일원배치 분산분석(ANOVA)을 하였다. 결과: 설문조사 결과 연령과 근무기간에 따른 Auto voice device의 유용성은 유의확률이 0.05 이상으로 모두 통계적으로 유의하지 않아 상관관계가 적은 것으로 나타났다. 그러나 검사건수에 따른 검사자의 피로도 감소는 유의확률 0.000 (p<0.01)으로 매우 유의한 결과를 얻었고, 검사건수에 따른 업무의 편의성도 유의확률 0.001 (p<0.01)으로 매우 유의하다는 결과가 나왔다. 결론: Auto voice device를 사용함으로써 업무의 편의성 증가와 목의 피로도 감소는 매우 높은 평가를 얻었다. 하지만 장비를 조작하는 시간이 추가됨에 따라서 전체적인 검사시간은 단축되지 않았고, 호흡조절도 장비를 사용하는 것과 육성을 사용하는 것을 비교하였을 때크게 다르지 않았다. 향후 개선사항들을 토대로 장비의 음질 개선과 언어의 다양화, 자막기 능을 추가하여 현재 장비의 업그레이드를 진행 중이며, 더 발전된 Auto voice device로 방사선사의 업무에 보다 더 효율을 줄 것으로 기대한다. Purpose: This study investigated usefulness of the device and its work convenience for radiologic technologist by making auto voice device used at chest X-ray lab where many voice guidance is made. Materials and Methods: The subjects are 87 radiologic technologists and they were asked to see video clip where how to use the device and method of applying to examination was introduced during the period from Jan. 9, 2012 to Feb. 24, 2012. Since then, study purpose was explained to ask for cooperation. For general characteristics of the subjects, the gender is 58 males (67.7%); 29 females (33.3%) - male is double female. Average age is 36 (35.89±7.90). Working period is 13 (13.41±7.54) years. As for number of examination by radiologic technologist, 41 radiologic technologists (28.7%) did 300-399 cases each person. To show general opinion of the subjects about examination, and opinion about improvements and quality of device, percentage was used. Effect and efficiency of using Auto voice device was analyzed using ANOVA through statistical processing by SPSS. Results: For reduction of fatigue in radiologic technologist s throat according to number of examination, p-value 0.000 (p<0.01) - this is very significant result. For work convenience according to number of examination, p-value 0.000 (p<0.01) -this is also very significant result. Conclusion: Using auto voice device brought increase of work convenience and reduction of fatigue in throat. But whole time for examination was not saved because maneuvering device requires additional time. In controlling breathing, there is no much difference between using device and human voice. It is expected that if auto voice device is improved in sound quality, variety in provided language etc. through this study results, this device would be more useful for work of radiologic technologists in the future.