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박중양,서동우,김영순,Park, Joong-Yang,Seo, Dong-Woo,Kim, Young-Soon 한국정보처리학회 2000 정보처리논문지 Vol.7 No.11
소프트웨어를 테스팅하는 동안 얻어지는 고장 데이터를 분석하여 소프트웨어의 신뢰성이 성장하는 과정을 평가하기 위해 여러 가지 소프트웨어 신뢰성 성장 모델들이 개발되었다. 그러나 이들 신뢰성 성장 모델들은 소프트웨어 개발과 사용환경에 관한 여러 가지 가정에 기반하고 있기 때문에, 이 가정이 적합하지 않은 상황이나 결함이 드물게 발생되는 소프트웨어에 대해서는 적절하지 않다. 입력영역에 기초한 소프트웨어 신뢰성 모델은 일반적으로 이러한 가정을 요구하지 않는데 디버깅 전의 소프트웨어와 디버깅 후의 소프트웨어를 별개의 것으로 다루어 많은 테스트 입력을 요하는 단점이 있다. 본 논문에서는 이러한 가정이 요구되지 않고 디버깅 전과 후의 소프트웨어를 동시에 테스트하는 방법에 기반을 둔 입력 영역 기반 소프트웨어 성장모델을 제안하고 그 통계적 특성을 조사한다. 이 모델은 모든 데이터를 다 활용하기 때문에 기존 입력영역 소프트웨어 신뢰성 모델에 비해 적은 테스트 입력을 필요로 할 것으로 기대된다. 그리고 소프트웨어의 유지보수 단계에 적용하기 위해 개발된 유사한 방법들과 비교한다.
박중양,이상운,박재흥,Park, Jung-Yang,Lee, Sang-Un,Park, Jae-Heung 한국정보처리학회 2000 정보처리논문지 Vol.7 No.7
Almost all existing software reliability models are based on the assumptions of he software usage and software failure process. There, therefore, is no universally applicable software reliability model. To develop a universal software reliability model this paper suggests the predictive filter as a general software reliability prediction model for time domain failure data. Its usefulness is empirically verified by analyzing the failure datasets obtained from 14 different software projects. Based on the average relative prediction error, the suggested predictive filter is compared with other well-known neural network models and statistical software reliability growth models. Experimental results show that the predictive filter generally results in a simple model and adapts well across different software projects.
A class of coverage growth functions and its practical application
박중양,이계민,박재흥 한국통계학회 2008 Journal of the Korean Statistical Society Vol.37 No.3
Coverage-based NHPP SRGMs have been introduced in order to incorporate the coverage growth behavior into the NHPP SRGMs. The coverage growth function representing the coverage growth behavior during testing is an essential factor of the coverage-based NHPP SRGMs. This paper proposes a class of continuous-time coverage growth functions and shows its equivalence to the class of discrete-time coverage growth functions in [Park, J.-Y., Lee, G., & Park, J. H. (2007). A class of discrete time coverage growth functions for software reliability engineering. The Korean Communications in Statistics, 14, 497–506]. For the examination of usability of the proposed class, three coverage growth functions belonging to the class are applied to real data sets and compared.
麝香ㆍ牛黃ㆍ三七根 複合方이 高脂血症 및 腦損傷에 미치는 影響
朴重陽,金炳卓 대전대학교 韓醫學연구소 1999 혜화의학회지 Vol.8 No.1
For the evaluation of the effect on SWS, experiments were made on hyperlipidemia induced by hypercholesterol diet, inhibitory reaction to human platelet aggregation, pulmonary thrombosis induced by collagen and epinephrine, global cerebral ischemia induced by KCN, brain ischemia induced by MCA occlusion, cytotoxicity of PC12 cells induced by amyloid β protein(25-35), and NO production in RAW cells stimulated by lipopolysaccharide. The results were obtained as follows 1. In the experiment on hyperlipidemia, the level of serum total cholesterol, phospholipid, and LDL-cholesterol were significantly decreased while the level of triglyceride, VLDL-cholesterol, and HDL-cholesterol had no significant change. 2. In the experiment on inhibitory reaction to platelet aggregation, SWS inhibited platelet aggregation induced by ADP(36.05%), by collagen (20.4%), and by thrombin(0.6%). 3. In the experiment on pulmonary thrombosis induced by collagen and epinephrine, the protective effect was found(37%). 4. In the experiment on global cerebral ischemia, coma duration induced by KCN changed insignificantly. 5. In the experiment on MCA occlusion, the change of neurologic grades on hind limb was significant only after the operation. Besides brain ischemic area and edema ratio were significantly decreased. 6. In the experiment on cytotoxicity of PC 12 cells induced by amyloid β protein, the significant protective effect was found as concentration increases. 7. In the experiment on NO production in RAW cells stimulated by lipopolysaccharide, NO was significantly decreased. According to the results, it is expected that SWS might be effective on hyperlipidemia and brain damage