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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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Korean Institute of Industrial Engineers
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Volume & Issues
Volume 12, Issue 2 - Dec 1986
Volume 12, Issue 1 - Jun 1986
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An Analysis of Weight-lifting Motion Using an Expert System and CAD Routine
Lee, Myeon-U ;
Journal of Korean Institute of Industrial Engineers, volume 12, issue 2, 1986, Pages 1~11
This study is concerned on computerized analysis of COG, torques and EMG amplitudes in weight-lifting motion. The results show that; (1) torques on major joints show a rather consistent relationship with respect to the sequence of four distinct motions in weight-lifting, (2) analysis of EMG amplitudes is a sensitive measure of both athlete's skill and his potential capability, and (3) range of COG variations can be used as indicator of motion stability, existence of undesirable posture, and target muscle for intensive training. A computerized routine, which includes analyses on COG, EMG and torque, is a scientific tool for coaching athletes. In addition, an Expert System which includes CAD routine was developed in order to promote better understanding for athletes and coaches.
Application of an Ergonomic Design of Work space Layout Using 3-Dimensional Human Model
Lee, Myeon-U ; Lee, Dal-Ho ; Jang, Seong-Rok ;
Journal of Korean Institute of Industrial Engineers, volume 12, issue 2, 1986, Pages 13~19
The purpose of this paper is to develop a 3-dimensional human model, an ergonomic CAD (Computer-Aided Design) system which would be very helphul in ergonomic design. An interactive program was developed, in which a user could change layout, body size, skin volume, and posture of the human model. As an example, effect of inclination of a steering wheel on visibility of a display panel was demonstrated. he result showed that ergonomic design can be aided by the 3-dimensional human model, and by the perspective graph by which design and evaluation process can be carried out more effectively.
A Lagrangean Relaxation Method for the Zero-One Facility Location Problem with Uniform Customer Demands and Facility Capacities
Tcha, Dong-Wan ; Yoo, Chun-Beon ;
Journal of Korean Institute of Industrial Engineers, volume 12, issue 2, 1986, Pages 21~31
Consider a capacitated facility location problem in which the demands of customers are all equal and so are the capacities of facilities. Under the restriction that each customer's uniform demand be met by exactly one facility, the objective is to select a set of facilities to open, and to assign customer's demand to them so as to minimize the total cost which includes fixed costs of opening facilities as well as variable assignment costs. The problem is modelled as a pure zero-one program which may be viewed as a variant of well-known capacitated facility location problems. The purpose of this study is to develop efficient computational procedures for solving the pure zero-one facility location problems. Due to the special structure of our zero-one location problem with uniform demand, it can be converted to a location problem with the unimodular property. A Lagrangean relaxation algorithm is developed to solve the location problem. The algorithm is made efficient by employing a device which exploits the special structure of a surrogate constraint. The efficiency of the algorithm is analyzed through computational experiments with some test problems.
Group Scheduling Problem in Multi - Stage Manufacturing Systems with Dependent Setup time
No, In-Gyu ; Nam, Hui-Yeol ;
Journal of Korean Institute of Industrial Engineers, volume 12, issue 2, 1986, Pages 33~44
This research is concerned with group scheduling problems in multi-stage manufacturing system with dependent setup time. The objective of the research is to develop and evaluate a heuristic algorithm for determining group sequence and job sequence within each group to minimize total tardiness in multi-stage manufacturing systems with sequence dependent group setup time. The group scheduling heuristic algorithm is developed and evaluated by comparisons with twenty-seven problems with the known optimum solutions and 144,000 random schedules of a large variety problems. The results indicate that the proposed heuristic algorithm gets the same optimum solutions for the problems and also provides the good solutions in comparison with the random schedules of the large variety problems. A numerical example is given to illustrate the heuristic algorithm.
A Method for Production Cell Formation in Cellular Manufacturing Systems
Jo, Gyu-Gap ; Lee, Mun-Uk ;
Journal of Korean Institute of Industrial Engineers, volume 12, issue 2, 1986, Pages 45~55
A method for forming production cells in cellular manufacturing systems is presented. The basic approach is based on part-machine group formation by using relationship matrix calculated from the original part-machine matrix. The cases of exceptional elements and bottleneck machines are discussed. The proposed method can work with any starting form of part-machine matrix and provides the same solution regardless of the changes of starting form of part-machine matrix for any given problem.
An Analysis of Flexible Manufacturing Systems Using the Linearizer Algorithm
Park, Yong-Jip ; Kim, Seong-Sik ;
Journal of Korean Institute of Industrial Engineers, volume 12, issue 2, 1986, Pages 57~65
In the design and operation of Flexible Manufacturing Systems (FMSs), it is useful to have a tool with which one can evaluate system's performances under various conditions. As one of such tools, this study chooses the Linearizer algorithm which uses mean value analysis (MVA). Linearizer algorithm is known to be the most accurate one among the MVA based heuristic algorithms yet developed. Though, up until now, the method is solely used to evaluate computer system's performances, this study shows that the Linearizer algorithm can be adapted for FMSs and still produces accurate solutions. Numerical examples for various classes of FMSs are presented and compared with the results from other methods and simulations.
A Two-Process Two-Product Inventory Model on a Single Facility with By-Product
Moon, Dug-Hee ; Hwang, Hark ;
Journal of Korean Institute of Industrial Engineers, volume 12, issue 2, 1986, Pages 67~76
This study is concerned with a single-facility production system in which two kinds of products, product 1 and 2, are produced by two different processes, process 1 and 2. Product 2 is produced either by process 2 or by process 1 as by-product, while product 1 is obtained only through process 1. The repeating sequences of the two processes and their associated lot sizes are determined which minimize the total inventory related cost. A solution algorithm is developed and is illustrated with numerical examples.
A Heuristic Method for Ordering in the Dynamic Inventory System with Quantity Discounts
Lee, Yeong-Jo ; Gang, Maeng-Gyu ;
Journal of Korean Institute of Industrial Engineers, volume 12, issue 2, 1986, Pages 77~87
This paper presents a heuristic method for solving the discrete-time ordering problem with quantity discounts and deterministic, time-varying demand. This algorithm utilizes a variation of the incremental cost approach(ICA) to determine a near optimal solution. The ICA is the method which reduces the total cost with reduction of the number of orders by one. In order to reduce the number of orders, if the incremental cost for one of the periods is negative, the demand of the period should be purchased in its immediate preceding period. In order to test the performance of this algorithm, an experiment is conducted that involves a large number of test problems covering a wide variety of situations. The result of the experiment shows that the proposed algorithm has 80.5% better solutions than the adjusted part period algorithm(APPA), which is known to be the best heuristic method.
Rate of Return Analysis in Investment for Postgraduate Science and Engineering Education
Kim, Dong-Muk ; Kim, Ji-Su ;
Journal of Korean Institute of Industrial Engineers, volume 12, issue 2, 1986, Pages 89~99
The study attempts to estimate and evaluate the rates of return on graduate degree holders who major in science and engineering. The model of this study adopts the rate of return method considering unemployment as well as mortality rate. The data are collected by questionnaires and interviews. The results show that the social rate of return(SROR) of bachelors is lower than the rate of return on investment in physical capital which is assumed as a decision criterion of public investment in Korea, but the SROR of Ph.D. holders is balanced. The results also show that the private rates of return (PROR) of all the levels in postgraduate science and engineering education are higher than the private discount rate which is a decision criterion of private investment in Korea. It also indicates that the PROR on investment in graduate education is not likely higher than the SROR because an individual bears high share of the educational costs.
Computer Programs for Nonparametric Tests
Bae, Do-Seon ; Jang, Jung-Sun ; Kim, Sang-Bok ;
Journal of Korean Institute of Industrial Engineers, volume 12, issue 2, 1986, Pages 101~108
Computer programs for IBM PC/XT/AT or compatibles, are presented for running 9 nonparametric tests. They include sign test, Wilcoxon signed rank test, Mann-Whitney Wilcoxon test, Kruskal-Wallis test, Kolmogorov-Smirnov one sample and two sample tests, Kendall and Spearman rank correlation coefficient tests, and Chi square test for contingency table. Each program is written with BASIC language and is combined into a statistical package, 'NONPARA'. It is easily accessible through the menu programs. The alogorithms on which each test is based, are also explained and 3 examples are given.