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이용자 조작 추적을 통한 안드로이드 어플리케이션 오류 분석
김문찬(Mun-Chan Kim),정충교(Choong-Kyo Jeong) 한국정보기술학회 2015 한국정보기술학회논문지 Vol.13 No.3
Since Android applications usually run, interacting continuously with the users via GUI, there occur many exceptional situations, which make it hard to predict, analyze and reproduce the errors. The logging tool provided by Android (logcat) provides stack traces helps but is not sufficient for reproducing errors. In this paper, we propose two methods to help developers analyze and reproduce Android application errors that are found in the field after deployment. The first method informs the developer an augmented stack trace at the failure instance which includes not only the method names but also the method signatures and the argument values supplied to the methods. The other shows the entire sequence of GUI user operations to developers. We used the aspect-oriented programming technique to implement these two methods. To show the effectiveness of the proposed methods, we apply the proposed methods to an actual open source project and see how easily developers can reproduce an error and correct it, compared to the case of relying solely on the logcat stack trace.
어선용 고효율 시리즈 (KF 시리즈) 프로펠러에 대한 성능 연구
장진열(Jin-Yeol Jang),김문찬(Moon-Chan Kim),이원준(Won-Joon Lee),문원준(Won-Jun Mun),이창섭(Chang-Sup Lee),문일성(Il-sung Moon) 한국해양환경·에너지학회 2012 한국해양환경·에너지학회 학술대회논문집 Vol.2012 No.5
The MAU series has been usually used for the fishing vessel"s propeller, which has been improved in consideration of the efficiency as well as the cavitation point of view in PNU The high efficiency standard series propeller(KF series) has been applied to the design of 52ton class fishing vessel"s propeller in the previous study. The experimental study for the performance of the design propellers called KF series for 52ton class fishing vessel has been conducted with five cases in KORDI towing tank The model tests have been carried out at different pitch ratio and expanded area ratio in comparison with the standard propeller to make the series chart‘ The KF series chart and the formula for performance expression will be completed on the basis of the experiment result.
울산지역에서 주폐경기 ( Perimenopause ) 여성의 골다공증 유병률과 연관인자
김영일(Young Il Kim),박재후(Jae Hoo Park),이종수(Jong Soo Lee),김진우(Jin Woo Kim),양승오(Seoung Oh Yang),전대준(Dae Joon Jeon),김문찬(Mun Chan Kim),정태흠(Tae Heum Jeong),이윤구(Yoon Gu Lee),이병두(Byoung Doo Rhee) 대한내과학회 2002 대한내과학회지 Vol.62 No.1
N/A Background: Osteoporotic fractures pose a major public problem, not only in Western populations but also of increasing significance in Asian populations. However, most previous studies for the prevalence of osteoporosis in Korea were carried out from the data of hospitalized or out-patient based subjects, hospital staff, healthy volunteers and so forth. The purpose of present study was to evaluate the normative data of bone mineral density (BMD) in Korean young and perimenopausal women and to determine the prevalence and risk factors of low bone mass, including osteoporosis and osteopenia in a community- based population. Methods: In 1999, a baseline survey was carried out in the Dong-gu of Ulsan city, a urban area but located in seashore of southeastern Korea. The selected community sample of 3,822 inhabit ants (all were women aged 49-54 years) were chosen. We studied 1,629 women among them and 127 healthy women aged 20-35 years. BMD of lumbar spine and femur was measured using dual-energy X-ray absorptiometry. For analysis of risk fact ors, those were excluded who was the current or recent user of estrogen and who had osteoporosis related disease or unknown menopause due to previous hysterectomy. Thus, 1,020 subjects were analysed for the association of low BMD and risk factors. Significant determinants of BMD were investigated using univariate and multiple regression analysis. Results: When our young normal data were used, 9.8% for the lumbar spine and 1.4% for the femoral neck of our study population (n=1,629) were classified as osteoporosis. Among them, the menopausal status of above 1,020 subjects had independent association with low BMD (T-score<-1.0) of both lumbar spine (odds ratio=4.71 in postmenopause, p <0.001) and femoral neck (odds ratio=2.86 in postmenopause, p <0.001). In premenopausal women (n=507), weight and age of menarche were associated independently with low bone mass, including osteoporosis and osteopenia of both lumbar spine and femoral neck. In postmenopausal women (n=513), weight and duration since menopause were associated independently with low bone mass of both lumbar spine and femoral neck. Also, daily amount of calcium intake had significant association (regression coefficient =0.047; p <0.05) independently with BMD of femoral neck. Conclusion: The result s of this population-based study suggest that it is import ant to prevent bone loss and screen the BMD in women aged 49-54 years with menopause, low body weight, late menarche, prolonged duration since menopause, low calcium intake.(Korean J Med 62:11- 24, 2002)
어선용 고효율 시리즈 (KF 시리즈) 프로펠러에 대한 성능 연구
장진열(Jin-Yeol Jang),김문찬(Moon-Chan Kim),이원준(Won-Joon Lee),문원준(Won-Jun Mun),이창섭(Chang-Sup Lee),문일성(Il-sung Moon) 대한조선학회 2012 대한조선학회 학술대회자료집 Vol.2012 No.5
The MAU series has been usually used for the fishing vessel's propeller, which has been improved in consideration of the efficiency as well as the cavitation point of view in PNU. The high efficiency standard series propeller(KF series) has been applied to the design of 52ton class fishing vessel's propeller in the previous study. The experimental study for the performance of the design propellers called KF series for 52ton class fishing vessel has been conducted with five cases in KORDI towing tank. The model tests have been carried out at different pitch ratio and expanded area ratio in comparison with the standard propeller to make the series chart. The KF series chart and the formula for performance expression will be completed on the basis of the experiment result.