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pISSN : 1975-7700 / eISSN : 2734-0570

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2010, Vol.5, No.4

  • 1.

    The Methodology of Access Point Default WEP Key an Alteration

    Lee, Ki Sung | Hee-Suk Seo | 2010, 5(4) | pp.1~8 | number of Cited : 1
    Abstract PDF
    Using mobile device to access WLAN that use a Access Point to use mobile device to access WLAN that use a Access Point WEP key and authentication procedures that are needed. Most owners of the AccessPoint in the AccessPoint device proportioned to create a company by using the default WEP key since default key are know by unauthorized users, there is vulnerability outflow of personal information. In this treatise, automatic WEP key generation, in new hardware design in proposed. This can prevent personal information leakage.
  • 2.

    A Study for performance improvement by system analysis of i-banking system running Bank A

    김현호 | 박용덕 | 2010, 5(4) | pp.9~17 | number of Cited : 0
    Abstract PDF
    The fundamental goal of the system tuning is to maintain the fast response time and to optimize the system performance at the same time. In this paper, WebLogic-based personal banking system and enterprise banking system are analyzed by the load-test tool that considers the predicted number of users from bank A and the transaction volume. The performance-analysis tool is run by the LoadRunner, in which the performance test and load test are efficiently performed. The estimation index shows the following in the system: at most 300 simultaneous users respond within four seconds; at most 650 simultaneous users respond within eight seconds; at most 800 users are limited under 80% of CPU usage. Furthermore, the host and delayed status of the response time of the system-related service are diagnosed. By suggesting the improved plan of the system management, the system will have the optimum performance in the future operation.
  • 3.

    Mechanism of Anguillosporal Inhibitory Activity for Phospholipase C as the Signal Transducer in the Biological Networking

    Lee, Junwon | Bo Yeon Kim | AHN JONG SEOG | 2010, 5(4) | pp.19~26 | number of Cited : 0
    Abstract PDF
    Anguillosporal dose-dependently inhibited phospholipase C (PLC)γ1 activity in A431 cells in response to epidermal growth factor (EGF). The compound also inhibited PLCβ1 activity in α-thrombin- stimulated CCL39 cells. In accordance with this, PLCγ1 and PLCβ1 activities were also decreased by anguillosporal in vitro. However, anguillosporal did not reduce the auto- phosphorylation of EGFR and the tyrosine phosphorylation of PLCγ1 in EGF-stimulated A431 cells. Also anguillosporal did not inhibit the tyrosine kinase activity of EGFR. From these results, it is suggested that anguillosporal is a specific inhibitor of phospholipase C.
  • 4.

    Computing Convergence Technology and Principles of Deoxyribonucleic Acid

    정영진 | 배영주 | Lee, Junwon and 1other persons | 2010, 5(4) | pp.27~35 | number of Cited : 0
    Abstract PDF
    Deoxyribonucleic acid (DNA) is the genetic blueprint that encodes for the basic functions and development of all living organisms and many viruses. Its main purpose is the storage of genetic material required for the production of proteins,RNAs, and all cells within the body. These DNA segments that carry the genetic information are called genes. Similar to the ones used in modern silicone-based, electronic computers, DNA molecules can be used to create logic gates with short DNA strands acting as input and output signals. With further development, these gates may be used to detect certain molecules such as markers, and take appropriate, pre-programmed action against it. The power of DNA logic gates is demonstrated by a DNA computer that can play a game of tic-tac-toe against a human opponent. Thus, through the double-helix shaped DNA, valuable information and new insights can be gained in a new field of science that brings together synthetic chemistry, enzymology, nanotechnology, and computer science.
  • 5.

    IT Manufacturing Productivity Analysis in China

    SANGWOOK KIM | 2010, 5(4) | pp.37~44 | number of Cited : 1
    Abstract PDF
    As the development of market economy system, the IT industry rapidly has been grow after Open and Reform period in China. In particular, the IT manufacturing now has lead the economic growth in China. Compared with quantity growth, we need to analyze the quality development of IT industry. For this, this paper analyzes the productivity development using Malmquist index. This paper classifies the eight IT manufacturing, and analyzes each Malmquist index and annual average Malmquist index. As the results, the productivity of IT manufacturing has been improved by 15.3% in 1995-2006. From the eight IT manufacturing, the manufacture of electronic components's productivity has been improved by 34.6%, that is the highest level. However, the manufacture of radar and its fittings and the manufacture of broadcasting and TV equipment have not improved. From the annual dynamic changes, the 1990's productivity improvement was higher than 2000's. This results implies that the 1990's is the initial stage, the growth is rapid respectively, while the 2000's is the growth stage, so the growth rate becomes more slow.
  • 6.

    The effect of Avatar types on Learning Participation, Attitude, Social Presence in Virtual Learning Environments

    박형성 | Sung Kyung | 2010, 5(4) | pp.45~52 | number of Cited : 0
    Abstract PDF
    Virtual reality learning has been used effectively for the educational use, based on the development of information,communication and technology. Virtual learning environment provides 3D image based on the fidelity, beyond 2D image environment. Through this, learners can have good learning experience that is very similar to one from the real world in the virtual learning environment. The purpose of this study is to find out the effect of agent types on learning participant and learner’s attitude in 3D virtual learning environment. As the result shows, we can get the fact that agent types have no significant effect on learning participant, but have some significant effect on learning attitude and social presence. With this result, we have to consider it as an important factor that indicates the instructor's appearance and role in virtual learning environment.
  • 7.

    A Study on Crest Line Detection Techniques from 3D models

    KIM, SOO KYUN | Kim,SeokHun | 2010, 5(4) | pp.53~58 | number of Cited : 0
    Abstract PDF
    With evolution of computer graphics, especially non-photorealistic rendering (NPR), detecting of feature from polygonal mesh became a very popular technique. Crest lines are some data detected from a polygonal mesh that contains a lot of information about the geometry of the mesh. Here we are interested in linear features, set of lines, that can best convey model’s shape. The purpose of this paper is to overview the most popular types of features and methods to extract them from a 3D model represented by polygonal mesh data.
  • 8.

    Real-time Tracking of Multiple Persons using Multi-modal Information

    김현우 | 2010, 5(4) | pp.59~67 | number of Cited : 0
    Abstract PDF
    This paper presents a real-time tracking method of multiple persons using stereo from a top-down view. Tracking in a top-down view is effective to overcome occlusion problem among multiple persons, but visual cues are weak and depth estimation isn’t accurate enough especially when wide-view lenses are used to cover large field of view. We approach the problem with a two-step probabilistic method: deterministic and stochastic searches. The deterministic search reduces the candidate locations/scales of the tracking objects by maximizing a 1-D rotation/scale-invariant depth similarity. Then, a customized particle filter is followed to finely estimate the locations/scales of the object by a 2-D search in a stochastic manner. The depth similarities from the previous deterministic search are incorporated into the stochastic particle filter as an importance function. Finally, the proposed algorithm has been tested on various situations and evaluated quantitatively in a person counting scenario.
  • 9.

    A Case Study of the Korean Home-appliance's US Market Entrance based on the Disruptive Innovation Theory

    김택준 | kim, kee-woong | 김택천 | 2010, 5(4) | pp.69~76 | number of Cited : 0
    Abstract PDF
    As a export-oriented Korean company, entering into an advanced and big market is a very strategic issue. In this study,We analyzed the new entrants, korean home-appliances companies, how they defeated the leading companies based on the Christensen's disruptive innovation theory. Korean washing machine gained 25% of market share in total washer market,and closed to 50% of market share in premium drum washer segment in US, competing with GE, Whirlpool who are No.1,2 company, in 6 years. We present some insights for successful launching in US or other advanced market. Which including, industry information, Market share, distribution channel, competition status and many empirical data and information. Until many papers, studied about the technological acquisition strategy and related theory rather than marketing approach view. But in this study how differentiate, and how leading the market in view of new-market disruptive innovation products and winning marketing factors.
  • 10.

    A Study on Use Factors of HTS between Investor Groups

    이원호 | 2010, 5(4) | pp.77~88 | number of Cited : 1
    Abstract PDF
    Recently, the usage of HTS(Home Trading Systems) is popular among stock investors with rapid increase of on-line stock brokerage portion. Therefore, domestic stock companies have their competitive strategic focused on customer retention through the enhancement of HTS. This study provides research results on explaning what and how factors affect HTS user satisfaction and system trust according to investor groups. This study refers satisfaction and trust theory, and reviews on classification of HTS investor groups. Also, this study categorized explanation factors as three groups: characteristics of users, characteristics of system, social environment. And this study assumed that these three factor groups might affect the user satisfaction and system trust of HTS differently by investor groups. This study compares the results by using HTS between beginner investors and non-beginner investors, between short-term investors and long-term investors. These results show that non-beginner investors and short-term investors have similar attributes as a professional investors, and also beginner investors and long-term investors have similar attributes as a non-professional investors. This study proves that the use factors of HTS affect the user satisfaction and system trust of HTS differently according to investor groups. It provides meaningful results to the HTS providers regarding how they differentiate their HTS strategically according to investor groups.
  • 11.

    First Person Shooter game for low-end PC

    SYUNGOG AN | KIM, SOO KYUN | 2010, 5(4) | pp.89~94 | number of Cited : 0
    Abstract PDF
    Most first person shooter games are produced using game engines and are fundamentally equipped with high quality collision sensing functions. This function of detecting collisions plays an important role in game production. This method proposes a method of making FPS games not through game engines but through DirectX. The advantage of using DirectX instead of collisions detecting functions of game engines is that one can use it in low-end PC and it is efficient in terms of memory. Also, the method of DirectX can proficiently sense collisions by comparing the radian of the spheres that surrounds the objects which will judge whether there was an impact between the objects.
  • 12.

    Analysis of the Characteristic Impedance of Tapered Waveguide for TEM Horn Antenna

    Kim,SeokHun | Choi, Jae Yeon | KIM, SOO KYUN | 2010, 5(4) | pp.95~102 | number of Cited : 0
    Abstract PDF
    The Characteristic impedance of the tapered waveguide for the TEM horm antenna is analyzed. The optimum variation function for the characteristic impedance is introduced. the numerical and experimental investigations of the modified optimal taper is observed and calculated for the discontinuity of the impedance. According to the calculated results, the variation of the characteristic impedance for the antenna can be finded. The results show improved impedance value of the antenna and a wider range of frequencies.
  • 13.

    Quadtree based GPS merge and distribution analysis system

    이동욱 | 김진술 | Minsoo Hahn | 2010, 5(4) | pp.103~108 | number of Cited : 0
    Abstract PDF
    The GPS devices have been used in various fields. Especially for the leisure like bicycle, the GPS device is one of the most important electronic devices for outdoor. The bicycle riders record their riding routes with the GPS devices and apply the recorded GPS information to the analysis services. However, most of the GPS information analysis services or researches are focused to the single GPS track analysis. In this paper, we propose the analysis system for multiple GPS tracks. The purposed system merges the GPS tracks which satisfy the queried conditions and generates the distribution of GPS information for the specific region. The merge procedure of the system is based on the Quadtree algorithm.