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A Study on the Service Improvement through the Analysis of Current Status of e-Trade Platform Usage (전자무역 플랫폼의 이용현황 분석과 서비스 고도화 방안)

  • Lee, Sang-Jin
    • International Commerce and Information Review
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    • v.11 no.3
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    • pp.47-71
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    • 2009
  • In order to implement e-trade infrastructure through the radical innovation of trade process, e-trade platform which is called 'uTradehub' has been developed for three years. After pilot operation of this platform in 2007, the formal service of e-trade such as logistics, customs and foreign exchanges had been provided in 2008. However, the usage of e-Trade platform is not the level of users' satisfaction because trade-related communities have not actively participated into e-trade platform and several functions with users requirements are necessary to develop additionally. In this regard, there are strong demands to suggest some strategies for application and usage proliferation of e-trade platform. Therefore, this paper would like to evaluate the current status of e-trade platform service and usage by the theoretical consideration of preceding researches and practical analysis of statistical data. Then, it will explore several service improvement ideas in terms of system supplementation and integration, electronic documents standardization, radical change of using fee, global connection, user oriented education and advertisement.

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Design of ECC Calculator for Digital Transmission Content Protection(DTCP) (디지털 컨텐츠 보호를 위한 DTCP용 타원곡선 암호(ECC) 연산기의 구현)

  • Kim Eui-Seok;Ryu Tae-Gyu;Jeong Yong-Jin
    • Proceedings of the IEEK Conference
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    • 2004.06a
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    • pp.47-50
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    • 2004
  • In this paper, we implement an Elliptic Curve Cryptosystem(ECC) processor for DTCP. Because DTCP(Digital Transmission Content Protection) uses GF(p), where p is a 160-bit prime integer, we design a scalar multiplier based on GF(p). The scalar multiplier consists of a modular multiplier and an adder. The multiplier uses montgomery algorithm which is implemented with CSA(Carry-save Adder) and CLA(Carry-lookahead Adder). Our new scalar multiplier has been synthesized using Samsung 0.18 um CMOS technology and the maximum operation frequency is estimated 98 MHz, with the size about 65,000 gates. The resulting performance is 29.6 kbps, that is, it takes 5.4 msec to process a 160-bit data frame. We assure that this performance is enough to be used for digital signature, encryption/decryption, and key exchanges in real time environments.

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Identification of Topological Entities and Naming Mapping for Parametric CAD Model Exchanges

  • Mun, Duh-Wan;Han, Soon-Hung
    • International Journal of CAD/CAM
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    • v.5 no.1
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    • pp.69-81
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    • 2005
  • As collaborative design and configuration design gain increasing importance in product development, it becomes essential to exchange parametric CAD models among participants. Parametric CAD models can be represented and exchanged in the form of a macro file or a part file that contains the modeling history of a product. The modeling history of a parametric CAD model contains feature specifications and each feature has selection information that records the name of the referenced topological entities. Translating this selection information requires solving the problems of how to identify the referenced topological entities of a feature (persistent naming problem) and how to convert the selection information into the format of the receiving CAD system (naming mapping problem). The present paper introduces the problem of exchanging parametric CAD models and proposes a solution to naming mapping.

An Implementation of Web-based XML/EDI System (웹 기반 XML/EDI 시스템 설계 및 구현)

  • 구태회;변광준;황인준
    • The Journal of Society for e-Business Studies
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    • v.6 no.1
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    • pp.83-99
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    • 2001
  • The EDI system supports the working environment which can exchange the standardized document through the each agreed communication method. Traditional EDI system is complicated to be implemented and needed high cost te using the system because of the specific VAN(Value Added Network). This Paper proposes the XML/EDI system using the web-based distributed object and proposed the component 'AnySchema', as it makes be able to use legacy Database for EDI user. This XML/EDI system exchanges the XML documents through the Internet, so proposed low cost to support the system. Also, by using the XML document, it doesn't need EDI specific software and easy to exchange data between different systems. This system is implemented by using Java, as platform-independent.

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A Model for Carbon Dioxide Exchanges of Pinus densiflora Population (소나무 개체군의 이산화탄소 교환 모델)

  • Suh, kyeHong
    • The Korean Journal of Ecology
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    • v.19 no.1
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    • pp.9-19
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    • 1996
  • The model PINUSCO2 hased of physiology was creted to simulate carbon dioxide budget in a population of red pine(pinus densiflora) which is one of the dominant species in Korea. Driving forces of PINUSCO2 are global radiation, maximum and minimum air temperatures. State variables fo the model are standing crops of leaf, branch, trunk and root of the red pine population. PINUSCO2 calculates net photosynthesis of canopy and respiration of each organ with 1 hour time step. PINUSCO2 estimated the annual gross productivity, respiration and net productivity of the red pine population as 43.99, 24.55, and 19.44 ton CO2·ha-1·yr-1, respectively, at the study sity(35°58′00"N, 128°25′35"E). PINUSCO2 showed that the red pine population grew mainly in spring and fall, and that in summer daily net population productivity frequently became negative.

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Implementation of SoC for NMEA2000 Ship Standard Network Protocol Using FPGA

  • Park, Dong-Hyun;Hong, Ji-Tae;Kim, Kyung-Yup;Yu, Yung-Ho
    • Journal of Advanced Marine Engineering and Technology
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    • v.34 no.1
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    • pp.125-132
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    • 2010
  • IEC61162-3 known as NMEA2000 protocol is approved as a standard network of SOLAS ship by ISO and used for the instrument network which exchanges data in real-time. For easy the development of ship network equipments, this study is focused on the development of SoC which can convert to NMEA2000 protocol from various kind of protocols such as TCP/IP, NMEA0183, RS422 and others using FPGA and u-Blaze. In this paper, we composed NMEA2000 protocol stack on FPGA and verified NMEA2000 network communication of FPGA system by connecting with commercialized devices through PC Hyper-terminal and network monitoring program.

Multi-Area Unit Commitment with Bilateral Contract Approach in Deregulated Electricity Market

  • Selvi, S.Chitra;Devi, R.P.Kumudini;Rajan, C.Christober Asir
    • Journal of Electrical Engineering and Technology
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    • v.4 no.3
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    • pp.346-352
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    • 2009
  • The eventual goal of this paper is to help the generating companies and load-serving entities to choose appropriate relative levels of interconnected system versus bilateral trades while considering risk, and economic performance. In competitive power markets, electricity prices are determined by balance between demand and supply in electric power exchanges or bilateral contracts. The problem formulation is bilateral contract incorporated into Multi-area unit commitment with import/export and tie-line constraints. This proposed method considers maximizing own profit or minimize the operating cost among the generating companies in multi-area system. The feasibility of the proposed algorithm has been demonstrated using IEEE system with four areas and experimental results shows that proposed method is reliable, fast and computationally efficient

An Effective Use of Hinterland in New Busan-Jinhae Port (부산${\cdot}$진해 신항의 항만배후단지 개발현황과 효율적인 이용방안에 관한 연구)

  • Kim, Jeong-Su;Sin, Gye-Seon
    • Journal of Korea Port Economic Association
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    • v.20 no.2
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    • pp.101-130
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    • 2004
  • Such Hinterland in New Busan-Jinhae Port are so placed as to do harm to their surrounding residential areas due to traffic, noise and dirt, etc. according to the current plan. So they are likely to fail to serve as harbors and residential districts. Because this is responsible for a conflict between harbors and urban functions, plans for the use of such areas should be well planned enough to achieve win-win results by getting rid of a conflict between the harbors and urban functions by creating manufactural and industrial complexes and green parks close to harbor logistics, by consolidating the functions of the cities through exchanges, commercial business and educational facilities and by adding comfort facilities at the hinterland of Ungdong and Myeongji.

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Analysis of Geometric Parameters for Fully Developed Laminar Flow Between Cylinders Arranged in Regular Array (정규배열내의 실린더 사이에서의 완전발달된 층류 유동의 기하학적 계수의 해석)

  • 이동렬
    • Journal of Advanced Marine Engineering and Technology
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    • v.25 no.5
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    • pp.1037-1049
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    • 2001
  • Considerable interest has evolved in the flow of non-Newtonian fluids in channels of noncircular cross section in compact heat exchanges. Analytical solution was developed for prediction of the flow rate and maximum velocity in steady laminar flow of any incompressible, time-independent non-Newtonian fluids in straight closed and open channels of arbitrary, but axially unchanging cross section. The geometric parameters and function of shear describing the behavior of the fluid model were evaluated for fluid flow among a bundle of rods arranged in triangular and square array. Numerical values of dimensionless maximum velocities, mean velocities, pressure-drop-flow parameters and friction factors were evaluated as a function of porosity and pitch-to-radius ratio.

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A Study on the Cyprus Costume (키프로스(CYPRUS) 민속복식 연구)

  • 송미경
    • Journal of the Korean Society of Costume
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    • v.40
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    • pp.67-80
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    • 1998
  • Being located in the east of the Mediterranean Sea, Cyprus used to play a bridge role of cultural exchanges between the East and the West during period of being occupied. As a consequence the fact that the style of costume might be changed at certain levels during the time is broadly accepted. Basic structure of Cypriot men's clothes during the late of the 19th century to the middle of 20th century is composed of\circled1 baggy trousers(vraka) \circled2 shirt(chemise) \circled3 jacket(ziboune/zibouna) \circled4 waistcoat(yilekko) \circled5 headdress(fez, kourouklin) \circled6 accessories. General composition of women's wear is \circled1 pantaloons(vrandzin) \circled2 shift(poukamiso) \circled3 outer garment(sayia, foustani, Amalia, costume) \circled4 waist kerchief(mandili tis koxas)\circled5 boots(podines)/pumps(goves) \circled6 scarves and accessories. As reviewed above, although men's clothes are still worn on a day to day basis, women's wear continues to exist only for festivals or as a tourist attraction. It was understood that this was an accepted consequence of 20th century modernization and reformation.

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