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이해각,조재환,조대철 한국물리학회 2013 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.62 No.9
This study investigated differences between the physical wedge and the dynamic wedge distributions of radiation by using an intensity-modulated radiotherapy (ImRT) MatriXX. The linear accelerator used X-rays with energy levels of 6 MV and 10 MV to adjust the collimator by motoring the independent jaws (X1, X2, Y1, Y2) for setting wedge angles of 15, 30, 45, and 60 degrees. The collimator field size was set as 10 × 10 cm2 or 20 × 20 cm2 at the maximum dose point. The dose distribution for each wedge had ±5% and ±11% errors for field sizes of 10 × 10 cm2 and 20 × 20cm2, respectively. The error was greatest at a wedge angle of 45 degrees and was pronounced at the end of the dynamic wedge where Y1 and Y2 met. Consequently, concluded that the dose distributions were similar for both wedges for the field size of a small beam profile. The beam dose was greatly increased at the end of the dynamic wedge. A more precise estimate of the therapeutic dose of radiation for a dynamic wedge that nearly matches that of the physical wedge can be achieved by correcting of the increasing part of the beam dose. The findings imply that a heavy wedge filter should not be used when calculating the isodose distribution and the therapeutic dose.
이해각 순천향대학교 부설 산업기술연구소 2001 순천향 산업기술연구소논문집 Vol.7 No.1
Discovering association rules is one of the most important task in data mining area. Recently many algorithms exploring the frequent item set have been proposed. In this paper, a new method of exploring the frequent item set for the association rule analysis. The proposed method is very efficient by using the statistical inferences and the results satisfy the required effectiveness. Experimental results shows the efficiency and the effectiveness of the proposed method.
수주관리 및 재고관리를 위한 사무자동화 프로그램의 구현
이해각,주영옥 순천향대학교 부설 산업기술연구소 2001 순천향 산업기술연구소논문집 Vol.7 No.1
In this paper, a database management program for an office automation is implemented and evaluated. The program is designed for the business department and the inventory management department of painting material manufacturing factories. The program is composed of five modules which work interactively well. The program provides the efficiency and convenience for both database administrator and end-user. Moreover, the database system satisfies the security requirements.
이해각 순천향대학교 부설 산업기술연구소 2006 순천향 산업기술연구소논문집 Vol.12 No.1
In this paper, a process monitoring system is implemented and tested. The data for monitoring is transferred from the production facilities to computer through PLC(Programmable Logic Controller). The analog signals of the facilities activities which are generated by using the several sensor switches are transferred to the PLC. And then, the PLC converts these analog signals to digital signal, and send the digital signal to a computer. The implemented computer program detects and recognizes which events occur on the facilities by analyzing these signals. The program monitors the facility states and reports them to a database system. Several useful statistics can be retrieved from the stored data in the database system. The implemented program can be easily applied to various types of automated systems, for example, the home automation and etc.
이해각 순천향대학교 부설 산업기술연구소 2001 순천향 산업기술연구소논문집 Vol.7 No.1
In this paper, an automation computer program is implemented on the quality control and management department of mass production system. First, a program which controls is coded for the data-input procedure. Second, an analysis program is implemented. We can supervise the manufacturing process state by using the program and the outputs of the programs are used for the quality warrenty for customers.
이해각 순천향대학교 부설 산업기술연구소 1998 순천향 산업기술연구소논문집 Vol.3 No.3
본 논문은 최소 수리가 가능한 시스템에 대한 최적 검사 정책을 제시한다. 시스템의 이상 유무를 확인하기 위하여 주기적으로 검사를 실시하며 고장이 발견되면 고장 원인을 제거하는 최소 수리를 실시한다. n번째 검사 후에는 시스템 전체를 교체한다. 또한 수리 될 때까지 지속된 고장은 시스템에 지연 시간에 비례하는 비용을 초래한다고 가정한다. 본 논문은 이러한 상황에서 단위 시간당의 기대 비용 함수를 구하고 이를 최소화하는 검사 주기와 시스템 전체를 교체하는 최적 시점을 구하는 알고리즘을 제시한다.