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효율적인 컴퓨터 포렌식 수사를 위한 정보 시각화 기법 연구
정윤석,정윤석,공병돈,조성식,김인수,명노해 대한인간공학회 2008 대한인간공학회 학술대회논문집 Vol.- No.-
사이버 범죄에 사용된 컴퓨터 데이터를 수집, 보호, 분석, 해석 하는 컴퓨터 포렌식 수사는 하드드라이브에 있는 방대한 양의 데이터를 처리해야 하기 때문에 수사관이 포렌식 수사 지원 소프트웨어를 사용하더라도 상당히 많은 시간이 소요되고 에러가 발생할 수 있다. 컴퓨터 포렌식 수사와 같이 무수히 많은 양의 데이터를 지각하고 의미 있는 정보를 찾아내야 하는 경우 정보시각화는 인간의 정보처리 능력 향상에 큰 도움을 줄 것이다. 본 연구에서는 컴퓨터 포렌식 수사관들이 수사 지원 소프트웨어를 통해 수행하는 과제와 컴퓨터 포렌식 수사에 적용할 수 있는 다양한 정보 시각화 기법을 분석하였다. 이를 바탕으로 시각화 기법 분류를 위한 새로운 기준을 제시하고, 컴퓨터 포렌식 수사에 가장 적합한 시각화 기법을 분류하였다. 본 연구 결과는 추후 효율적인 컴퓨터 포렌식 수사를 위한 정보시각화 기법 개발에 중요한 기초연구가 될 것이다.
정윤석,Andrew S. Cavanagh,Anne C. Dillon,Markus D. Groner,Steven M. George,이세희 한국세라믹학회 2010 한국세라믹학회지 Vol.47 No.1
Ultrathin atomic layer deposition (ALD) coatings were found to enhance the performance of lithium-ion batteries (LIBs). Previous studies have demonstrated that LiCoO2 cathode powders coated with metal oxides with thicknesses of ~100-1000 Å grown using wet chemical techniques improved LIB performance. In this study, LiCoO2 powders were coated with conformal Al2O3 ALD films with thicknesses of only ~3-4 Å established using 2 ALD cycles. The coated LiCoO2 powders exhibited a capacity retention of 89% after 120 charge-discharge cycles in the 3.3~4.5 V (vs. Li/Li+) range. In contrast, the bare LiCoO2 powders displayed only a 45% capacity retention. This dramatic improvement may result from the ultrathin Al2O3 ALD film acting to minimize Co dissolution or to reduce surface electrolyte reactions.
정윤석,서지현,김하영,민경훈,오윤걸,박동휘,류주석 대한재활의학회 2016 Annals of Rehabilitation Medicine Vol.40 No.6
Objective To investigate the predictive value of enhanced-magnetic resonance imaging (MRI) and fluoroscopic factors regarding the effects of transforaminal epidural steroid injections (TFESIs) in low back pain (LBP) patients with lumbosacral radiating pain.Methods A total of 51 patients who had LBP with radiating pain were recruited between January 2011 and December 2012. The patient data were classified into the two groups ‘favorable group’ and ‘non-favorable group’ after 2 weeks of follow-up results. The favorable group was defined as those with a 50%, or more, reduction of pain severity according to the visual analogue scale (VAS) for back or leg pain. The clinical and radiological data were collected for univariate and multivariate analyses to determine the predictors of the effectiveness of TFESIs between the two groups.Results According to the back or the leg favorable-VAS group, the univariate analysis revealed that the corticosteroid approach for the enhanced nerve root, the proportion of the proximal flow, and the contrast dispersion of epidurography are respectively statistically significant relative to the other factors. Lastly, the multiple logistic regression analysis showed a significant association between the corticosteroid approach and the enhanced nerve root in the favorable VAS group.Conclusion Among the variables, MRI showed that the corticosteroid approach for the enhanced target root is the most important prognostic factor in the predicting of the clinical parameters of the favorable TFESIs group.
정윤석,이준호,Tae Seung Shin,한창희,강성학,이용석 대한배뇨장애요실금학회 2010 International Neurourology Journal Vol.14 No.4
Various postoperative complications have been reported after the use of tension-free vaginal tapes (TVT). The transobturator approach was introduced to minimize the potential complications. The next generation of recently introduced TVT-SECUR is intended to minimize the incidence of complications. Herein we report a case of internal pudendal artery injury sustained during this procedure that was successfully treated by radiological embolization. Angiography with vessel embolization, when available, should be considered when the arterial injury is suspected.