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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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Journal of Korean Institute of Industrial Engineers
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Journal DOI :
Korean Institute of Industrial Engineers
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Volume & Issues
Volume 9, Issue 2 - Dec 1983
Volume 9, Issue 1 - Jun 1983
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A Study on the Modified Multiple Choice Knapsack Problem
Won, Jung-Yeon ; Jeong, Seong-Jin ;
Journal of Korean Institute of Industrial Engineers, volume 9, issue 2, 1983, Pages 3~8
The multiple choice knapsack problem is modified. To solve this modified multiple choice knapsack problem, Lagrangian relaxation is used, and to take advantage of the special structure of subproblems obtained by decomposing this relaxed Lagrangian problem, a modified ranking algorithm is used. The K best rank order solutions obtained from each subproblem as a result of applying modified ranking algorithm are used to formulate restricted problems of the original problem. The optimality for the original problem of solutions obtained from the restricted problems is judged from the upper bound and lower bounds calculated iteratively from the relaxed problem and restricted problems, respectively.
A Computerized Analysis of Kinetic Posture and Muscle Contraction during a Weight Lifting Motion
Lee, Myeon-U ; Jang, Won-Gyeong ; Seong, Deok-Hyeon ;
Journal of Korean Institute of Industrial Engineers, volume 9, issue 2, 1983, Pages 9~25
The purpose of this study was to film up computerized analyses for both kinematic posture(film analysis) and muscle dynamics (EMG) during a weight-lifting motion. (Snatch, Clean and Jerk) Using a motor drive camera (3.5 frames/sec) and a Location Analyzer, motion tracks of 13 landmarks, which were attached to the major joints, during the motion were converted into digital values. At the same time, EMG amplitudes from 11 major muscle groups were recorded. Recorded data were processed via analog/hybrid computer (ADAC 480) and digital computer (PDP 11/44). Landmark locations and EMG amplitude were integrated by a computerized routine. Computer output included graphic reproductions on sepuential dislocations of body segments, center of gravity of body segments and the associated changes on EMG amplitude such as % EMG's of major muscle group during a weight lifting motion. The results strongly suggest that the computerized motion-EMG integration can provide a further working knowledge in selection and in training of workers and athletes. Suggestions for a further study include additional device for velocity measurement, expansion of the link model for biomechanical analysis and other implementations necessary for athletic application.
Calculation of Economic CL Data for Sculptured Surface Machining
Kim, Dae-Hyeon ; Choe, Byeong-Gyu ;
Journal of Korean Institute of Industrial Engineers, volume 9, issue 2, 1983, Pages 27~35
This paper describes a procedure of generating economic cutter-location(CL) data for the machining of sculptured surfaces on a multi-axis NC milling machine. Measures of economy are the machining time (cutter move distance) and the length of NC tape (number of CL data points). The presented procedure minimizes both the number of CL data and the total distance of cutter moves, for a given cutter (spherical end-mill) size and parameteric cutting direction, while satisfying given tolerance requirements. The procedure has been implemented in FORTRAN for a smooth composite Bezier surface. The maximum allowable cutter size is calculated by the program so that a user can choose a cutter size. CL data can be generated in both parametric directions u and v. Experimental results show that there are significant differences between the parametric directions, and that cutter size should be as large as possible in order to minimize the cutting time and NC tape length.
Economic Production Quantity for a Linear Trend in Demand and Constant Replenishment
Jo, Jae-Rip ; Lee, Hyo-Seong ;
Journal of Korean Institute of Industrial Engineers, volume 9, issue 2, 1983, Pages 37~46
The classical deterministic inventory model is investigated for the case of linear trend in demand and constant production rate. Three models are presented so as to minimize the total of set-up and inventory carrying costs over a finite time span. For each of the policies the methods are developed which can determine the optimal production quantities and times at which production should be started. Three policies are compared in point of costs and times for getting solutions and various case examples are also presented.
A Study on the Sensitivity Analysis of GERT Network
Lee, Sang-Do ; Jeong, Jung-Hui ; Park, Gi-Ju ;
Journal of Korean Institute of Industrial Engineers, volume 9, issue 2, 1983, Pages 47~53
In this paper, a sensitivity analysis is proceeded to improve the network of manufacturing process by converting the qualitative network into GERT Network and by finding equivalent probability, MFG's of variables and sensitivity equation in GERT Network. Sensitivity analysis of GERT Network is important in evaluating, reviewing and improving system. System improvement in GERT Network is achieved by increasing the equivalent probability and by decreasing the equivalent time.