Title   name
KSIAM 2006 Annual Meeting
  Speaker   Lee, Jeehyun  
  Date 2006-11-25
  Place 건국대학교
  File  의 1 번째 Real Media 동영상입니다. 의 1 번째 강연자료입니다.
Abstract : Electro-muscular disruption (EMD) devices such as TASER M26 and X26 have been used asa less-than-lethal weapon. Such EMD devices shoot a pair of darts toward an intended targetto generate an incapacitating electrical shock. In the use of the EMD device, there have beencontroversial questions about its safety and effectiveness. To address these questions, we needto investigate the distribution of the current density J inside the target produced by the EMDdevice. One approach is to develop a computational model providing a quantitative and reliableanalysis about the distribution of J. In this paper, we set up a mathematical model of a typicalEMD shock, bearing in mind that we are aiming to compute the current density distribution insidethe human body with a pair of inserted darts. The safety issue of TASER is directly relatedto the magnitude of |J| at the region of the darts where the current density J is highly concentrated.Hence, fine computation of J near the dart is essential. For such numerical simulations,serious computational difficulties are encountered in dealing with the darts having two differentvery sharp corners, tip of needle and tip of barb. The boundary of a small fishhook-shaped dartinside a large computational domain and the presence of corner singularities require a very finemesh leading to a formidable amount of numerical computations. To circumvent these difficulties,we developed a multiple point source method of computing J. It has a potential to provideeffective analysis and more accurate estimate of J near fishhook-shaped darts. Numerical experimentsshow that the MPSM is just fit for the study of EMD shocks.