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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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Journal of the Korea Industrial Information Systems Research
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Journal DOI :
The Korea Society for Industrial Systems
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Volume & Issues
Volume 18, Issue 6 - Dec 2013
Volume 18, Issue 5 - Oct 2013
Volume 18, Issue 4 - Aug 2013
Volume 18, Issue 3 - Jun 2013
Volume 18, Issue 2 - Apr 2013
Volume 18, Issue 1 - Feb 2013
Selecting the target year
A Caching Scheme to Support Session Locality in Hierarchical SIP Networks
Choi, KwangHee ; Kim, Hyunwoo ;
Journal of the Korea Industrial Information Systems Research, volume 18, issue 1, 2013, Pages 1~9
DOI : 10.9723/jksiis.2013.18.1.001
Most calls of a called user are invoked by the group of calling users. This call pattern is defined as call locality. Similarly Internet sessions including IP telephony calls have this pattern. We define it session locality. In this paper, we propose a caching scheme to support session locality in hierarchical SIP networks. The proposed scheme can be applied easily by adding only one filed to cache to a data structure of the SIP mobility agent. And this scheme can reduce signaling cost, database access cost and session setup delay to locate a called user. Moreover, it distributes the load on the home registrar to the SIP mobility agents. Our performance evaluation shows the proposed caching scheme outperforms the hierarchical SIP scheme when session to mobility ratio is high.
Design of a Multiple Band-notched Wideband Circular Slot Antenna with Arc-shaped Slots
Yeo, Junho ; Park, Cheol-Young ;
Journal of the Korea Industrial Information Systems Research, volume 18, issue 1, 2013, Pages 11~17
DOI : 10.9723/jksiis.2013.18.1.011
A design method to achieve multiple band-rejection characteristics in a wideband circular slot antenna is presented. First, a wideband circular slot antenna fed by a coplanar waveguide is designed to operate in the frequency range between 2.3 and 11GHz, which covers WLAN, WiBro, WiMAX, and UWB frequency bands. Next, resonant frequency variations of rejection bands are examined with respect to different slot locations and lengths when slots are inserted on the ground conductor and the circular patch of the antenna. When arc-shaped slots are placed close to the circular transition from a feeding part, multiple notch bands are obtained. In this case, a half of the guided wavelength of the first notch band corresponds to the slot length and other notch bands are integer-multiple of the first band. Single notch band can be obtained when the slot is located off the transition part. Based on this study, a wideband circular slot antenna with five band-rejection frequency bands at 2.45, 3.5, 4.9, 7.35, and 9.8GHz is designed and fabricated. The first arc-shaped slots are located in the ground conductor close to the circular transition from a feeding part to generate notch bands at 2.45, 4.9, 7.35, and 9.8GHz, while the second slot for 3.73 GHz is placed on top side in the circular patch. The proposed design method is validated by good agreement between the simulated and measured results.
Analysis of Electromigration in Nanoscale CMOS Circuits
Kim, Kyung Ki ;
Journal of the Korea Industrial Information Systems Research, volume 18, issue 1, 2013, Pages 19~24
DOI : 10.9723/jksiis.2013.18.1.019
As CMOS technology is scaled down more aggressively, the reliability mechanism (or aging effect) caused by the diffusion of metal atoms along the conductor in the direction of the electron flow, also called electromigration (EM), has become a major reliability concern. With the present of EM, it is difficult to control the current flows of the MOSFET device and interconnect. In addition, nanoscale CMOS circuits suffer from increased gate leakage current and power consumption. In this paper, the EM effects on current of the nanoscale CMOS circuits are analyzed. Finally, this paper introduces an on-chip current measurement method providing lifetime electromigration management which are designed using 45-nm CMOS predictive technology model.
Derivations of Single Hypothetical Don't-Care Minterms Using the Quasi Quine-McCluskey Method
Kim, Eungi ;
Journal of the Korea Industrial Information Systems Research, volume 18, issue 1, 2013, Pages 25~35
DOI : 10.9723/jksiis.2013.18.1.025
Automatically deriving only individual don't-care minterms that can effectively reduce a Boolean logic expressions are being investigated. Don't-care conditions play an important role in optimizing logic design. The type of unknown don't-care minterms that can always reduce the number of product terms in Boolean expression are referred as single hypothetical don't-care (S-HDC) minterms. This paper describes the Quasi Quine-McCluskey method that systematically derives S-HDC minterms. For the most part, this method is similar to the original Quine-McCluskey method in deriving the prime implicants. However, the Quasi Quine-McCluskey method further derives S-HDC minterms by applying so-called a combinatorial comparison operation. Upon completion of the procedure, the designer can review generated S-HDC minterms to test its appropriateness for a particular application.
Development of Home Training System with Self-Controlled Feedback for Stroke Patients
Kim, Chang Geol ; Song, Byung Seop ;
Journal of the Korea Industrial Information Systems Research, volume 18, issue 1, 2013, Pages 37~45
DOI : 10.9723/jksiis.2013.18.1.037
Almost of stroke patients who experience aftereffects such as motor, sensory and cognitive disorders have to take some rehabilitation therapies. It is known that the consistent training for rehabilitation therapy in their home is more effective than rehabilitation therapy in hospital. A few home training programs were developed but these programs don't give any appropriate feedback messages to the client. Therefore, we developed a home training program which can provide appropriate feedback message to the clients using the Kinect sensor which can analyze user's 3-D dimensional motion. With this development, the client can obtain some feedback messages such as the knowledges of performance, results and self-controlled feedback. The program will be more effective than any existing programs.
The Exploratory Study on the Method of Information System Introduction in SMEs using Delphi Technique
Kim, Narang ; Joo, Seok Jeong ;
Journal of the Korea Industrial Information Systems Research, volume 18, issue 1, 2013, Pages 47~58
DOI : 10.9723/jksiis.2013.18.1.047
This study offers a
matrix on the development method pursuant to the level of readiness and necessity for IS of SMEs, and the Delphi method survey through the assistance of a panel of IT experts was employed. Upon analyzing the results, in all rounds, the 1st quadrant and 2nd quadrant resulted in a preference for leasing methods (ASP/SaaS) and the other quadrants resulted in a preference for outsourcing. Quadrants closer to the 1st quadrant showed a preference for leasing methods (ASP/SaaS) and quadrants closer to the 6th quadrant showed a preference for outsourcing. In the case of the IS implementation for the entire company, all three levels of readiness resulted in a preference for outsourcing. The point in which the implementation method changed depending on the level of readiness was when unit systems were implemented, and among the implementation methods, in-house development showed the lowest results.
The Relationship of Market Orientation, Organizational Learning and Innovativeness with New Product Development and Overall Performance
Kim, Young-Kyun ;
Journal of the Korea Industrial Information Systems Research, volume 18, issue 1, 2013, Pages 59~70
DOI : 10.9723/jksiis.2013.18.1.059
The purpose of this study was to identify the antecedents of organizational innovativeness, which in turn influence firm performance that is composed of new product development performance and overall firm performance. We collected responses from C-level executives, and conducted a structural equation model analysis. Results revealed that organizational memory and market orientation influence organizational innovativeness, which in turn influence new product development performance and overall firm performance. However, interestingly, new product development performance was not found to affect overall firm performance. Based on these results, we have confirmed the importance of market orientation and organizational memory for organizational innovativeness. Practical implications related to the results are provided.
A Study on the Application of Quality Function Deployment for the Success of Social Commerce
Lee, Sang-Shik ;
Journal of the Korea Industrial Information Systems Research, volume 18, issue 1, 2013, Pages 71~79
DOI : 10.9723/jksiis.2013.18.1.071
In order to enhance the understanding of social commerce which is widely spreading globally in a few years, the characteristics selecting social commerce company are analyzed by using quality function deployment(QFD) that is popular in quality management area. To achieve this purpose, this study investigates the concept, market environment, and major competitors of social commerce and interactive relationship between customer's requirements and service characteristics was uncovered by using the house of quality(HOQ) which is a method of QFD. In addition, this study proposes the conceptual model integrating analytic hierarchy process(AHP) and QFD by quantitatively evaluating the importance of customer's requirements and service characteristics.
A study on the information effect of tracking error affecting the sector ETF pricing
Byun, Young Tae ; Lee, Sang Goo ;
Journal of the Korea Industrial Information Systems Research, volume 18, issue 1, 2013, Pages 81~89
DOI : 10.9723/jksiis.2013.18.1.081
The purpose of this study is to analyze the information effect about the pricing using the ETF price, the benchmark index, and the total tracking error between the ETF price and the benchmark index on the index ETF market and sector ETF markets. Furthermore, the total tracking error is distinguished between the market tracking error and the NAV tracking error. Summary of this study are as follows: First, While KODEX200 don't have impact factors on the price, the most sectors of ETF have the factors affecting the pricing decision. They are the day before the total tracking error or market tracking error. Second, for the ETF price of the most industry, we find that the day before the market tracking error have the price discovery function because it is a negative(-) coefficients. But NAV tracking error could not find such a feature. Finally, the sector ETF price of energy chemical, construction, IT, and semiconductor industries affected of the day before positive(+) impact by the benchmark index price.