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대용량 주기억장치 시스템에서 효율적인 연관 규칙 탐사 알고리즘
이재문,Lee, Jae-Mun 한국정보처리학회 2002 정보처리학회논문지D Vol.9 No.4
본 논문은 대용량 주기억장치를 가진 시스템에 적합한 연관 규칙 탐사 알고리즘에 관한 연구이다. 이를 위하여 먼저 기존의 잘 알려진 알고리즘인 DHP, Partition 방법을 대용량 주기억장치를 가진 시스템에서 효율적으로 동작하도록 확장하였고, 다음 Partition 방법에 대해서 해쉬 테이블과 비트맵 기법을 적용하여 Partition 방법을 개선하는 방법을 제안하였다. 제안된 알고리즘은 실험적 환경에서 DHP와 성능이 비교되었으며, 제안하는 알고리즘이 확장된 DHP보다 최대 65%까지 성능 개선 효과가 있음을 보인다. This paper propose an efficient algorithm for mining association rules in the large main memory systems. To do this, the paper attempts firstly to extend the conventional algorithms such as DHP and Partition in order to be compatible to the large main memory systems and proposes secondly an algorithm to improve Partition algorithm by applying the techniques of the hash table and the bit map. The proposed algorithm is compared to the extended DHP within the experimental environments and the results show up to 65% performance improvement in comparison to the expanded DHP.
이재문,정승은,Lee, Jae-Mun,Jeong, Seung-Eun 대한영상의학회 2002 대한영상의학회지 Vol.46 No.6
Gastric cancer is one of the cancers occurring most frequeently in Korea, and the diagnosis and staging of the cancer, required in order to determine the best method of treatment and the prognosis, are very important. For staging, CT scanning has been widely used, and in this report the author describes the techniques and proce-dures involved, investigating the accuracy and limitations of modality in both the diagnosis and staging of this disease 위암은 한국인에서 흔히 발생하는 종양으로 이의 조기 진단과 정확한 병기결정이 치료방법의 선택과 예후에 매우 중요하다.전산화 단층 촬영술은 위암의 병기결정에 가장 흔히 사용되고 있는 방사선학적 진단방법이다.저자는 위암진단 및 병기 결정을 위한 전산화 단층촬영술검사방법,병기결정 방법 및 그 진단적 정확도와 한계점들을 기술하고자 한다.
이재문(Lee Jae Mun) 한국사회체육학회 2003 한국사회체육학회지 Vol.19 No.1
This study was designed to measure physical fitness in the daily lives of 508 elderly women, The range of age in each group is divided into 65-69 years old, 70-74years old, 75-79years old, over 80years. The following are the results All factors of physical fitness have slowly decreased in their daily lives as age advances and the results showed that they decreased rapidly from the age of 75. As a result of my investigation I have formed the following conclusions. The reduction of physical fitness in the daily life of women over 65 is inevitable. After the age of 75 there is a sharp decline in physical fitness. I think with regular exercise, good life style habits, and increased physical fitness the results will be a healthier life. The existing system has applied a uniform method regardless of age concerning the health and physical fitness of the elderly. This method should be sublated and replaced with a more systematical exercise prescription. This is necessary for us in these times towards the aging society.
이재문(Jae-Mun Lee),이철희(Chul-Hee Lee),최문석(Mun-Suk Choi),김철기(Cheol-Ki Kim),고은배(Eun-Bae Koh) 한국자동차공학회 2009 한국자동차공학회 부문종합 학술대회 Vol.2009 No.4
The need to know the braking performance in vehicle has been acknowledged for many years since the invention of vehicles. Since there are numerous design variables as well as nonlinearities in the braking system, it is not easy to predict the braking performance accurately. In this paper, a computation program is developed to estimate the braking performance numerically. This synthetic braking performance program is dealing with pedal force, pedal travel and deceleration by including all braking parts such as master cylinder, booster, valves, brake pads, rotors, and hoses. In order to improve the accuracy of program, the semi-empirical model of braking system is developed by using the empirical test data of pad compression, hose expansion and friction coefficient between pads and rotors. The performance of estimation accuracy is evaluated by comparing with actual vehicle test results. The developed program is easy to operate for the engineers of brake system in developing new vehicles by incorporating the graphical presentation as well as exporting data in Microsoft Excel format.
규칙적인 운동습관이 폐경기 중년여성의 골밀도 및 신체조성에 미치는 영향
이재문(Lee Jae-Mun),이소은(Lee so-Eun) 한국체육과학회 2008 한국체육과학회지 Vol.17 No.3
This study was investigated that effect of regular exercise program on body composition, and BMD(bone mineral density) of middle aged menopausal women : 10 subjects in experimental group experienced aerobic dance for 7year(3/wk) - EHG, 10 subjects in control group - CG. The followings are the conclusions of this study. 1. EHG compared with CG was demonstrated significantly high numerical value in fat free mass, skeletal muscle mass(p<.05), but no body fat mass, % body fat, BMI. 2. EHG compared with CG improved in Lumbar(L1-L4), femur neck, femur total BMD(p<.05) except femur torch. 3. In lumbar(L1-L4) BMD T-Score, a EHG showed normal range of -0.5, while BMD of CG was decreased by -1.7 As a result, regular aerobic dance habit may help to improve body composition, BMD on middle aged menopausal women.
5일간의 크레아틴 구강투여가 씨름 선수의 등속성 근기능에 미치는 영향
이재문 ( Lee Jae Mun ),최승욱 ( Choe Seung Ug ) 한국운동영양학회 2003 Physical Activity and Nutrition (Phys Act Nutr) Vol.7 No.2
The study, with the purpose of assessment on the effects of creatine as an exercise support to Korean wrestlers who were trained highly, examined the effects of it on the isokinetic muscular function by 5-day prescription for 13 Korean wrestlers, varying the amount of dosage with each per weight. Thirteen subject performed 24 maximal voluntary isokinetic contraction at 240 deg/sec, before and after 5 days of placebo (n=7) or creatine (n=6) oral supplementation. In the placebo group, muscle peak torque% body weight were increased, but no differences were seen comparing muscle peak torque, total work, total work% body weight, average power, average power% body weight, endurance ratio in all subject. In the creatine supplementation group, muscle peak torque, peak torque% body weight were increased, but no differences total work, total work% body weight, average power, average power% body weight, endurance ratio in all subject. A short period creatine prescription, which is a support to exercise ability improvement, has no effect on exercise ability whatsoever.