실험적 해석을 위한 머리-목 형태의 더미 개발

김영은,남대훈,고창훈,Kim, Yeong-Eun,Nam, Dae-Hun,Koh, Chang-Hun 대한기계학회 1997 大韓機械學會論文集A Vol.21 No.7

A head-neck complex dummy, for measuring brain pressure and reaction force in the cervical spine was developed for experimental study related in injury mechanism. Dummy comprised aluminium-casted head with water filled cavity for simulating brain and mechanical neck assembled with six motion segments. Several kinds of experiments (compression, bending, cyclic modulus, relaxation and constant velocity profile) for the developed mechanical neck showed that this neck model is biomechanically reliable compared with in-vitro test results. As an application of developed head-neck complex dummy, shock absorbing properties of protective helmet was chosen. The experiments showed that the maximum pressure increment of brain after impact was tolerable compared with the guide line for mild brain injury pressure (25psi). Constrast to this results, the reaction force in the neck was high enough to produce failure in the cervical spine.

표준 요 시료 중 Oxalate의 측정을 위한 FT-NIR 분광기의 유용성 검정

김영은,홍수형,김정완,이종영,Kim, Yeong-Eun,Hong, Su-Hyung,Kim, Jung-Wan,Lee, Jong-Young 대한예방의학회 2006 예방의학회지 Vol.39 No.2

Objectives : The determination of oxalate in urine is required for the diagnosis and treatment of primary hyperoxaluria, idiopathic stone disease and various intestinal diseases. We examined the possibility of using Fourier transform near-infrared (FT-NIR) spectroscopy analysis to quantitate urinary oxalate. The practical advantages of this method include ease of the sample preparation and operation technique, the absence of sample pre-treatments, rapid determination and noninvasiveness. Methods : The range of oxalate concentration in standard urine solutions was $0-221mg/{\ell}$. These 80 different samples were scanned in the region of 780-1,300 nm with a 0.5 nm data interval by a Spectrum One NTS FT-NIR spectrometer. PCR, PLSR and MLR regression models were used to calculate and evaluate the calibration equation. Results : The PCR and PLSR calibration models were obtained from the spectral data and they are exactly same. The standard error of estimation (SEE) and the % variance were $10.34mg/{\ell}$ and 97.86%, respectively. After full cross validation of this model, the standard error of estimation was $5,287mg/{\ell}$, which was much smaller than that of the pre-validation. Furthermore, the MCC (multiple correlation coefficient) was 0.998, which was compatible with the 0.923 or 0.999 obtained from the previous enzymatic methods. Conclusions : These results showed that FT-NIR spectroscopy can be used for rapid determination of the concentration of oxalate in human urine samples.

전방 충돌에 따른 유아 승객 거동을 위한 3세 유아 모델의 개발

김영은,김희석,Kim, Yeong-Eun,Kim, Hui-Seok 대한의용생체공학회 1999 의공학회지 Vol.20 No.1

최근 들어 많은 관심에 대상이 되고 있는 동차 사고시 어린이 승객의 부상현상을 해석하기 위하여 범용 동력학 패키지인 DADS를 이용하여 3세 어린이 모델을 개발하였다. 모델은 모두 14개의 요소들과 12개의 조인트로 구성 시켰으며 부스터를 장착한 시트에 3점식 벨트를 체결한 형태로 개발되었으며 썰매를 이용한 전방 충돌 시뮬레이션 결과 기존의 더미를 이용한 실험 결과와 일치하는 응답 특성을 얻을 수 있었다. In order to increase our understanding of the injury mechanism in the child occupant, three year old child model was developed using commercial dynamic package DADS. Total 14 segments and 12 joints were used to compose a model in three points belted condition with booster seat. HYGE sled test case was simulated to validate the developed model. Based on the comparison of the model and published test results, the developed model appears to be a resonable representation of the three year old dummy.

유한요소 모델을 이용한 인간 뇌의 미만성 부상에 대한 해석

김영은,남대훈,Kim, Yeong-Eun,Nam, Dae-Hun 대한의용생체공학회 1998 의공학회지 Vol.19 No.6

가속도 변화에 따른 뇌의 미만성 부상을 해석하기 위하여 성인 및 2세, 6세아의 머리 부분에 대한 유한 요소 모델을 개발하였다. 외력은 최대값이 200g인 삼각형 형태의 가속도를 가하였으며, 가속도의 방향, 지속시간에 따른 변화를 해석하였다. 가속도 변화에 따라 발생되는 뇌내의 전단력 분포는 뇌간, 뇌교 및 중뇌등 신경조직이 밀집된 곳에서 크게 발생되어 이곳에서 미만형 부상이 발생할 확률이 높음을 알 수 있었으며, 특히 6세아 모델의 경우 뇌간에서의 최대 전단력이 굴전 형태의 회전가속도 받았을 때 가장 크게 나타나는 결과를 보여 개발된 모델이 임상결과와 일치함을 보여주고 있었다. 가속도 지속 시간이 길어짐에 따라 뇌내에 발생되는 압력 및 최대 전단력의 크기가 증대되고 있었으며, 유아모델의 경우 성인모델에 비하여 가속도 방향과 관계없이 낮은 압력이 발생하였지만 발생압력이 감소하지 않고 지속되는 현상을 보이고 있었다. 그리고 각 가속도에 의한 미만성 부상을 예방하기 위한 안전지수로는 현재 탑승자의 안전 설계에 활용되고 있는 HIC보다는 최대 전단응력이 더 적절한 부상 예측인자임을 알 수 있었다. To anlyze the diffuse axonal injury of the human brain, 3-D finite element models of the adult, two and three years child were developed. Triangular type acceleration which had its maximum value 200g was applied to investigate the effects of acceleration direction and duration time. The pattern of high shear stress generated at the brain stem, pones and midbrain was similar to the pattern of DAI seen in the clinical observation, especially high maximum shear stress was detected in the brain stem of the six year old child model under flexional acceleration. As the duration of acceleration increased generated pressure and maximum shear stress also increased. For the children's model relatively small pressure was generated regardless of the acceleration direction and continued much longer compared with adult's model. From this analysis maximum shear stress was revealed more proper indicator to predict DAI compared to HIC in case of angular acceleration loading.

성인 뇌와 유아 뇌 모델의 진동 특성 해석

김영은,유진환,Kim, Yeong-Eun,Yu, Jin-Hwan 대한의용생체공학회 1998 의공학회지 Vol.19 No.6

머리(뇌 포함) 부분에 대한 3차원 유한 요소 모델을 이용하여 진동 방향에 따른 응답특성을 해석하였다. 해석 결과 성인의 뇌는 9Hz, 14Hz에서 고유 진동수를 나타내었으며 유아의 뇌에서는 2Hz, 3Hz에서 고유 진동수가 계산되었다. 진동 방향에 관계없이 각 진동에 대해 계산된 가속도를 제외한 전단력, 압력, von-Mises 값의 최대, 최소값의 비는 성인에 비해 유아모델에서 더 크게 나타났다. 각 고유 진동수에서 성인모델은 14Hz에서 상지 중추보다 하지 중추를 관장하는 뇌의 영역에서 보다 큰 응력이 계산되어 상지에 의한 오동작 보다 하지에 의한 오동작을 일으킬 가능성이 더 큼을 유추할 수 있었다. Using three dimensional finite element model of the human brain, vibratory characteristics of the human brain according to vibratory direction was analyzed. From this analysis 9, 14Hz and 2, 3Hz natural frequencies were calculated for adult's and baby's brain model respectively. Regardless of the vibratory direction relatively high shear stress, pressure and von Mises stress variation except acceleration were detected in the baby brain model. At each natural frequencies, adult's model showed relatively high stress level in the region of lower limb control area compared with upper limb control area at 14Hz natural frequency.

초음파센서를 이용한 자동분사 향기 등

김영은(Yeong Eun Kim),오도희(Do Hee Oh) 한국IT마케팅학회 2014 한국IT마케팅학회 학술대회 Vol.2014 No.1

Homes and cafes, and restaurants etc. If you visit a variety of places, including anywhere like that one about fragrances and moods are present. However, such cases provide a good air freshener fragrance but drops in design. As interior accessories That is irrelevant. While the mood can provide attractions such as the interior is small but creates a good atmosphere, whereas the practical side it points falling. To synthesize these fragrances such as mood and to equip both the design and the practical side. Also add the function to be automatically injected jet flavor hover hands only. In this paper, we implement an automatic spray fragrance, etc. that you can use in everyday life, such as through a combination of ultrasonic sensors with Arduino LED

아이디어 매칭 어플리케이션 설계

김영은 ( Yeong-eun Kim ),황정민 ( Jeong-min Hwang ),이선진 ( Sun-jin Lee ),이상욱 ( Sang-wook Lee ),김동주 ( Dongju Kim ) 한국정보처리학회 2022 한국정보처리학회 학술대회논문집 Vol.29 No.2

특허청에서 주관하는 아이디어 사업화 및 아이디어 경진대회를 PC 환경 웹 플랫폼으로 제공하고 있다. 본 논문에서는 아이디어 사업화 및 아이디어 경진대회를 바탕으로 웹 환경이 아닌 모바일 플랫폼으로 구축하고 사용 시 편리한 UI/UX, 모바일 특성을 활용한 모바일 애플리케이션을 설계하여 다양한 아이디어의 육성 및 사업화 추진을 돕고 다양한 문화와 창업 확산을 도울 수 있는 방안을 제시하고자 한다.

전시 작가들의 작업과정 기록을 볼 수 있는 인터랙티브 프로젝션매핑 캘린더

김영은(Kim, Yeong-Eun),홍미학(Hong, Mi-Hak),김건동(Kim, Geon Dong) 한국디자인학회 2015 한국디자인학회 학술발표대회 논문집 Vol.2015 No.10

재난안전 관련 공동주택 차별화 계획을 위한 거주자 만족도 및 선호도 조사

김영은(Kim, Yeong-Eun),양해진(Yang, Hae-Jin),정상혁(Jeong, Sang-Hyeok),김미경(Kim, Mi-Kyung) 한국주거학회 2020 한국주거학회 학술대회논문집 Vol.32 No.2

The purpose of this study was to analyze the preferences for items related to differentiation plans through the satisfaction of the residents of the apartment houses to secure the disaster safety of the apartment houses, and to present the planning direction of the apartment houses. This study was conducted to understand the satisfaction of 120 residents of apartment houses, including residential officetels, and urban housing. related to disaster safety through online surveys. The results were as follows. First, in terms of disaster safety, evacuation space, fine dust air quality, disaster evacuation evacuation route, earthquake, infectious disease, fire safety, typhoon, and flood were the lowest in satisfaction. Second, in the preference survey related to the apartment differentiation plan, the preference for non-burnable exterior finishing materials and insulation materials was the highest in public spaces, and in unit households, the installation of a disaster warning system that could be easily recognized by the safety weak was highest. Based on these results, this study presents a plan for differentiating apartment houses related to disaster safety.

스테인리스-알루미늄 클래드 강판재의 원형컵 온간 성형성 연구

류호연,김영은,김종호,Ryu, Ho-Yeon,Kim, Yeong-Eun,Kim, Jong-Ho 대한기계학회 2000 大韓機械學會論文集A Vol.24 No.1

Warm, forming technique which is one of the new forming technologies to improve formability of sheet metal is applied to the cylindrical cup drawing of stainless-aluminum. clad sheets. In experiments the temperature of die and blank holder is varied from room temperature to 18$0^{\circ}C$, while the punch is cooled by circulation of coolant to increase the fracture strength of workpiece on the punch corner area. Test materials chosen for experiments are STS304-A1050-STS304, STS304-A1050-STS430 clad sheets and A1050-0 aluminum sheet. Teflon film as a lubricant is used on both sides of a workpiece. The limit drawing ratio as well as quality of drawn cups(distribution of thickness and hardness)are investigated and validity of warm drawing process is also discussed.