합지벽지의 표면특성에 따른 비산혈액방울의 충돌각도 최적공식 도출


Calculation of Optimized Formula of the Impact Angle of Blood Droplet according to the Characteristic of the Surface of Wallpaper

김경미, 한효선, 임동아, 장예림, 이상윤, 주은아, 서영일, 김진표, 고재모, 박남규

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In the case of spattered blood in bloodstain pattern analysis, the impact angle can be calculated by looking at the shape and size of it. The impact angle is a constant angle that occurs when the blood droplet touches the target surface, and the formula sin = W / L is used to calculate the impact angle. This formula is now used in the analysis of bloodstain patterns, and the results show that the error rate is about 18 % depending on the conditions. Nevertheless, since there is no formula to reduce the error rate, a new modification formula is being studied. In this study, the optimum impact angle calculation formula is derived from the wall surface where many scattered blood is found in crime scene in Korea and the error rate of the other impact angle calculation formula is compared. Currently, the use of wallpaper in Korea has a tendency to increase rapidly in silk wallpaper. However, the most cheap and easy-to-install wallpaper, which is still used the largest percentage, has been used as the target surface. Experimental results on the optimal angle of impact angle along the surface revealed that the optimal formulas were different for each surface and the -12 to 0 % error rate was observed when the optimal formula for one surface was applied to the other surface. Therefore, the optimal angle of impact angle should be applied differently depending on the surface, and accordingly, a database of optimal formulas for each surface is required. In the case of the laminated wallpaper, when the experimental condition for obtaining the optimized formula is not available, the improvement formula W / L = 0.9145 sin (0.02619? + 0.6478) + 0.5629 sin (0.04441? + 3.9020) will contribute to solve the case by deducing the correct impact angle value from the existing formula.


I. 서론
II. 재료 및 방법
2.1 실험재료 및 장치
2.2 실험방법
III. 실험 결과
IV. 결론 및 고찰
V. 감사의 글
VI. 참고문헌


  • 김경미 Kyung-Mi Kim. 연세대학교 보건과학부 과학수사학전공
  • 한효선 Hyo-Sun Han. 연세대학교 보건과학부 과학수사학전공
  • 임동아 Dong-A Lim. 충남대학교 평화안보대학원 과학수사학과
  • 장예림 Ye-Rim Jang. 연세대학교 보건과학부 과학수사학전공
  • 이상윤 Sang-Yoon Lee. 국립과학수사연구원 법공학부
  • 주은아 Eun-A Joo. 국립과학수사연구원 법공학부
  • 서영일 Young-Il Seo. 국립과학수사연구원 법공학부
  • 김진표 Jin-Pyo Kim. 국립과학수사연구원 법공학부
  • 고재모 Jae-Mo Goh. 국립과학수사연구원 법공학부
  • 박남규 Nam-Kyu Park. 국립과학수사연구원 법공학부


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