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
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.
목차
Abstract 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
법과학 분야는 사회정의 구현에 있어 크나큰 가치가 있음에도 불구하고 우리나라에서는 이 분야에 대한 인식이 미흡하여 선진 외국에 비해 침체되어 있는 실정이다. 이에 우리나라에서도 법과학 분야와 관련 있는 학계, 연구기관, 수사기관 등 유관 단체들로 구성된 한국 법과학회를 창립하여 이 분야를 활성화 시켜 과학수사를 한층 더 발전시키기 위함을 목적으로 한다.