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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 41, Issue 6 - Dec 2015
Volume 41, Issue 5 - Oct 2015
Volume 41, Issue 4 - Aug 2015
Volume 41, Issue 3 - Jun 2015
Volume 41, Issue 2 - Apr 2015
Volume 41, Issue 1 - Feb 2015
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Optimal Energy Consumption Scheduling in Smart-Grid Considering Storage Appliance : A Game-Theoretic Approach
Yeo, Sangmin ; Lee, Deok-Joo ; Kim, Taegu ; Oh, Hyung-Sik ;
Journal of Korean Institute of Industrial Engineers, volume 41, issue 5, 2015, Pages 414~424
DOI : 10.7232/JKIIE.2015.41.5.414
In this research, we consider a smart grid network of electricity with multiple consumers connected to a monopolistic provider. Each consumer can be informed the real time price changes through the smart meter and updates his consumption schedule to minimize the energy consumption expenditures by which the required power demand should be satisfied under the given real time pricing scheme. This real-time decision making problem has been recently studied through game-theoretic approach. The present paper contributes to the existing literature by incorporating storage appliance into the set of available household appliances which has somewhat distinctive functions compared to other types of appliances and would be regarded to play a significant role in energy consumption scheduling for the future smart grid. We propose a game-theoretic algorithm which could draw the optimal energy consumption scheduling for each household appliances including storage. Results on simulation data showed that the storage contributed to increase the efficiency of energy consumption pattern in the viewpoint of not only individual consumer but also whole system.
Performance Evaluation of R&D Commercialization : A DEA-Based Three-Stage Model of R&BD Performance
Jeon, Ikjin ; Lee, Hakyeon ;
Journal of Korean Institute of Industrial Engineers, volume 41, issue 5, 2015, Pages 425~438
DOI : 10.7232/JKIIE.2015.41.5.425
This study proposes a three-stage model of R&BD performance which captures commercialization outcomes as well as conventional R&D performance. The model is composed of three factors : inputs (R&D budgets and researchers), outputs (patents and papers), and outcomes (technical fees, products sales, and cost savings). Three stages are defined for each transformation process between the three factors : efficiency stage from input to output (stage 1), effectiveness stage from output to outcome (stage 2), and productivity stage from input to outcome (stage 3). The performance of each stage is measured by data envelopment analysis (DEA). DEA is a non-parametric efficiency measurement technique that has widely been used in R&D performance measurement. We measure the performance of 171 projects of 6 public R&BD programs managed by Seoul Business Agency using the proposed three-stage model. In order to provide a balanced and holistic view of R&BD performance, the R&BD performance map is also constructed based on performance of efficiency and productivity stages.
Design of One-Class Classifier Using Hyper-Rectangles
Jeong, In Kyo ; Choi, Jin Young ;
Journal of Korean Institute of Industrial Engineers, volume 41, issue 5, 2015, Pages 439~446
DOI : 10.7232/JKIIE.2015.41.5.439
Recently, the importance of one-class classification problem is more increasing. However, most of existing algorithms have the limitation on providing the information that effects on the prediction of the target value. Motivated by this remark, in this paper, we suggest an efficient one-class classifier using hyper-rectangles (H-RTGLs) that can be produced from intervals including observations. Specifically, we generate intervals for each feature and integrate them. For generating intervals, we consider two approaches : (i) interval merging and (ii) clustering. We evaluate the performance of the suggested methods by computing classification accuracy using area under the roc curve and compare them with other one-class classification algorithms using four datasets from UCI repository. Since H-RTGLs constructed for a given data set enable classification factors to be visible, we can discern which features effect on the classification result and extract patterns that a data set originally has.
Optimal Production Controls in a Two-Stage Production System with a Component Selling Option
Kim, Eungab ;
Journal of Korean Institute of Industrial Engineers, volume 41, issue 5, 2015, Pages 447~452
DOI : 10.7232/JKIIE.2015.41.5.447
This paper considers a two-stage make-to-stock production system. The first stage produces a single-component and the second stage produces a make-to-stock product using components. In addition to internal demands, the first stage faces external demands with the option of accepting or rejecting. To ration component inventory, the manufacturer adopts a static rule. This paper analyzes the production controls at both facilities that maximizes the manufacturer`s profit. Using the Markov decision process model, we characterize the optimal production policy by two monotonic switching curves.
Discovering Meaningful Trends in the Inaugural Addresses of United States Presidents Via Text Mining
Cho, Su Gon ; Cho, Jaehee ; Kim, Seoung Bum ;
Journal of Korean Institute of Industrial Engineers, volume 41, issue 5, 2015, Pages 453~460
DOI : 10.7232/JKIIE.2015.41.5.453
Identification of meaningful patterns and trends in large volumes of text data is an important task in various research areas. In the present study, we propose a procedure to find meaningful tendencies based on a combination of text mining, cluster analysis, and low-dimensional embedding. To demonstrate applicability and effectiveness of the proposed procedure, we analyzed the inaugural addresses of the presidents of the United States from 1789 to 2009. The main results of this study show that trends in the national policy agenda can be discovered based on clustering and visualization algorithms.
User Needs of Three Dimensional Hand Gesture Interfaces in Residential Environment Based on Diary Method
Jeong, Dong Yeong ; Kim, Heejin ; Han, Sung H. ; Lee, Donghun ;
Journal of Korean Institute of Industrial Engineers, volume 41, issue 5, 2015, Pages 461~469
DOI : 10.7232/JKIIE.2015.41.5.461
The aim of this study is to find out the user`s needs of a 3D hand gesture interface in the smart home environment. To find out the users` needs, we investigated which object the users want to use with a 3D hand gesture interface and why they want to use a 3D hand gesture interface. 3D hand gesture interfaces are studied to be applied to various devices in the smart environment. 3D hand gesture interfaces enable the users to control the smart environment with natural and intuitive hand gestures. With these advantages, finding out the user`s needs of a 3D hand gesture interface would improve the user experience of a product. This study was conducted using a diary method to find out the user`s needs with 20 participants. They wrote the needs of a 3D hand gesture interface during one week filling in the forms of a diary. The form of the diary is comprised of who, when, where, what and how to use a 3D hand gesture interface with each consisting of a usefulness score. A total of 322 data (209 normal data and 113 error data) were collected from users. There were some common objects which the users wanted to control with a 3D hand gesture interface and reasons why they want to use a 3D hand gesture interface. Among them, the users wanted to use a 3D hand gesture interface mostly to control the light, and to use a 3D hand gesture interface mostly to overcome hand restrictions. The results of this study would help develop effective and efficient studies of a 3D hand gesture interface giving valuable insights for the researchers and designers. In addition, this could be used for creating guidelines for 3D hand gesture interfaces.
Comparison of the Two Layout Structures in Automotive Body Shops Considering Failure Distributions
Kim, Ha Seok ; Wang, Guan ; Shin, Yang Woo ; Moon, Dug Hee ;
Journal of Korean Institute of Industrial Engineers, volume 41, issue 5, 2015, Pages 470~480
DOI : 10.7232/JKIIE.2015.41.5.470
There are many challenges in manufacturing system for new factory construction. Although factories produce same product, the layout of each factory may be different. The body shop in an automotive factory is a typical flow line with assembly, but the layout concept of the line varies among factories. In this paper, two types of layouts in the body shops of automotive factories, one for layered build and the other for modular build, are compared using simulation study. The simulation experiments indicate that the modular build layout is better than the layered build layout with respect to production rate. The effects of various failure distributions on the throughputs are also investigated, and some insights are suggested regarding the layout concept.
Small-Sample Inspection Plans for the New Product Quality Level Evaluation of Finite Population : Focused on Guided Weapons in Development Stage
Shin, Byung-Cheol ; Byun, Jai-Hyun ; Lee, Chang-Woo ; Lee, Ki-Yong ; Choi, Jong-Soo ; Woo, Hee-Sung ; Seo, Bo-Gil ;
Journal of Korean Institute of Industrial Engineers, volume 41, issue 5, 2015, Pages 481~487
DOI : 10.7232/JKIIE.2015.41.5.481
In the product development stage, it is very important to ensure demanded quality level before moving to the full-scale manufacturing. For example, in developing guided weapons, live-fire tests are required to verify the final performance of the weapons which are very expensive. The quality evaluation of the guided weapons needs destructive testing, which makes it necessary to test as small number of samples as possible. This paper presents sampling inspection plans and calculating system for finite population guided weapons, which can meet the demanded quality level and confidence level with the minimum number of performance tests. The result of this paper can be useful for any kind of costly destructive testing.
Life Cycle Analysis of Stem Cell Technology Based on Diffusion Model : Focused on the Research Stage
Jang, In-young ; Hong, Jungsik ; Kim, Taegu ;
Journal of Korean Institute of Industrial Engineers, volume 41, issue 5, 2015, Pages 488~498
DOI : 10.7232/JKIIE.2015.41.5.488
Research on stem cells can be divided into three categories : pluripotent stem cell, adult stem cell, and induced pluripotent stem cell. Technology life cycle (TLC) on research stage is analyzed for the three stem cell categories based on diffusion model. Three diffusion models-logistic, Bass, and Bass model with integration constant (BMIC)-are applied to the number of articles related to each stem cell category in SCOPUS lists. Two different parameter estimation methods is used for each of logistic and Bass model. Results show that (1) the current year, 2015, lies in growth period at pluripotent stem cell and adult stem cell, and lies in growth period or maturity period at induced pluripotent stem cell. (2) Model fitness is the highest at BMIC model. (3) Imitation effect works best at the research area of induced pluripotent stem cell.
Identifying Service Opportunities for Enhancing Driving Safety of Intra-City Buses Based on Driving Behavior Analysis
Kim, Min-Jun ; Lim, Chie-Hyeon ; Lee, Chang-Ho ; Kim, Kwang-Jae ; Jeon, Jinwoo ; Park, Yongsung ;
Journal of Korean Institute of Industrial Engineers, volume 41, issue 5, 2015, Pages 499~510
DOI : 10.7232/JKIIE.2015.41.5.499
The purpose of this research is to identify new service opportunities for enhancing driving safety of intra-city buses based on driving behavior analysis. Service opportunity identification involves finding target customers of service (to whom), motivations for service (why), service contents (what), and service delivery process (when, where). This paper presents an analysis of driving behaviors using the operational data of intra-city buses in conjunction with traffic accident data and drivers` driving history data. This paper also presents four identified service opportunities based on the data analysis results. This research would contribute to enhancing driving safety of intra-city buses in Korea and serve as a basis for developing new services for driving safety enhancement.
Policy Safety Stock Cost Optimization : Xerox Consumable Supply Chain Case Study
Suh, Eun Suk ;
Journal of Korean Institute of Industrial Engineers, volume 41, issue 5, 2015, Pages 511~520
DOI : 10.7232/JKIIE.2015.41.5.511
Inventory, cost, and the level of service are three interrelated key metrics that most supply chain organizations are striving to optimize. One way to achieve this goal is to create a simulation model to conduct sensitivity analysis and optimization on several different supply chain policies that can be implemented in actual operation. In this paper, a case of Xerox global supply chain modeling and analysis to assess several "what if" scenarios for the consumable policy safety stock is presented. The simulation model, combined with analytical cost model and optimization module, is used to optimize the policy safety stock level to achieve the lowest total value chain cost. It was shown quantitatively that the policy safety stock can be reduced, but it is offset by the inbound premium transportation cost to expedite supplies in shortage, and the outbound premium transportation cost to send supplies to customers via express shipment, requiring fine balance.