• Title/Summary/Keyword: communication structure

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Data Send-Receive Structure for Online Game Synchronization (온라인 게임 동기화를 위한 데이터 송수신 구조)

  • Ju, Woo-Suk
    • Journal of Korea Game Society
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    • v.10 no.6
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    • pp.147-155
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    • 2010
  • On this paper, suggests a communication structure making possible to fast data send-receive for the gaming process synchronization. For these things, first of all, analyze the data send-receive speed effecting on the online game by the game genre. Moreover, we suggested a proper data communication structure like real-time online action game genre which gaming synchronization effects on the gaming process. Communication structure suggested on this paper is being used with TCP/UDP protocol, and it is applied to the network system and verify improved data send-receive speed. These data send-receive structure can be applied to the various online games.

A design of a lowpass filter using Quad-Spiral Defected Ground Structure (Quad-Spiral Defected Ground Structure를 이용한 저역통과 여파기 설계)

  • Jeong, Yong-Woo;Kim, Chul-Soo;Park, Kyu-Ho;Ahn, Dal
    • Proceedings of the Korea Electromagnetic Engineering Society Conference
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    • 2003.11a
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    • pp.343-346
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    • 2003
  • A new structure to design low pass filters (LPFs) is presented rho proposed structure has the etched shape of Quad-Spiral DGS(Defected Ground Structure) on microstrip transmission lines. By extracting the equivalent circuit elements of unit Quad-Spiral DGS, LPFs are designed easily. The equivalent circuit of Quad-Spiral DGS consists of a step impedance resonator and lumped elements. The proposed LPF provided steep rejection characteristics with 5-poles. Experimental results show excellent agreements with circuit simulation results in wide band and the validity of our circuit modeling for LPF design. The result shows another possibility of Quad Spiral DGS for microwave devices.

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The effect of pore structure and surface properties of carbon nanotube films on the performance of a lithium sulfur battery

  • Song, Hyeonjun;Hwang, Yunjae;Kumar, Vimal Tiwari;Jeong, Youngjin
    • Carbon letters
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    • v.27
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    • pp.12-17
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    • 2018
  • We fabricated a Li-S battery with post-treated carbon nanotube (CNT) films which offered better support for sulfur, and investigated the effect of the surface properties and pore structure of the post-treated CNT films on Li-S battery performance. Post-treatments, i.e., acid treatment, unzip process and cetyltrimethylammonium bromide (CTAB) treatment, effectively modified the surface properties and pore structure of the CNT film. The modified pore structure impacted the ability of the CNT films to accommodate the catholyte, resulting in an increase in initial discharge capacity.

Examining the Knowledge Structure in the Communication Field: Author Cocitation Analysis for the Editorial Board of the Journal of Communication, 2008 and 2011 (Journal of Communication의 편집위원회에 대한 저자동시인용분석을 이용한 언론학 분야의 지적구조와 사회적 배경 분석: 2008년과 2011년 비교)

  • Kim, Hyun-Jung
    • Journal of the Korean BIBLIA Society for library and Information Science
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    • v.23 no.2
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    • pp.109-132
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    • 2012
  • This study examines the social network of scholars in the field of communication by using author cocitation data. A matrix containing the number of cocited documents between pairs of authors is created for social network analysis of scholars who are on the editorial board of Journal of Communication, and the networked map of the scholars is used to visualize the knowledge structure of the field by identifying groups of authors who are more central than others. In addition, the study compares the previous analysis performed in 2008 and the current analysis on the editorial board of the journal, which increased from 146 to 254 scholars in numbers. Author cocitation data was collected using Social Science Citation Index (SSCI) through the Web of Science database, and UCInet was used to create and visualize the author cocitation network and to analyze the correlation between the cocitation network and the factors that may have affected the structure of the cocitation network.

Improvement of Electromagnetic Shielding Structure for Reduction of the Leakage Magnetic Field in WPT System (WPT 시스템의 누설자계 감소를 위한 전자파 차폐구조 개선)

  • Kim, Jongchan;Lee, Seungwoo;Kang, Byeong-Nam;Hong, Ic-Pyo;Cho, In-Kui;Kim, Nam
    • The Journal of Korean Institute of Electromagnetic Engineering and Science
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    • v.28 no.1
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    • pp.61-68
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    • 2017
  • In this paper, we propose an improved magnetic field shielding structure to reducing the magnetic field generated in the wireless power transfer system operating at a low frequency band. The proposed structure consists of the magnetic material and the conductive material, magnetic field cancelling effect for power transfer is minimized while improving the leakage magnetic field cancelling effect by optimizing the various design parameters in the proposed structure. We analyzed and verified the efficiency of the wireless power transfer system and the reduction effect of the leakage magnetic field through computer simulation and measurement. Analysis results show that power transfer efficiency of the wireless power transfer system utilizing the proposed structure is 77 %, which is maintained at the conventional power transfer efficiency. In addition, compared with the structure maintaining high power transfer efficiency, leakage magnetic field strength is reduced to 29~37 % at the nearest point.

Performance Analysis of Data Link Protocol for Interface between EIS and LDTS (전자연동장치와 역정보전송장치간 인터페이스를 위한 데이터링크 프로토콜 성능해석)

  • Hwang, Jong-Gyu;Lee, Jae-Ho
    • Journal of the Korean Society for Railway
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    • v.6 no.2
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    • pp.135-141
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    • 2003
  • According to the computerization of railway signaling systems, the interface link between these signaling equipment is also replaced by digital communication channel, expecially communication link for interface between EIS and LDTS, but there are some problems in the present state of railway signaling. First of all, different communication protocol is applied to interface between above two signaling equipment although they have same functions. The other is that the communication protocol currently used in railway field has some unreasonable points such as structure, formation of byte, error correction scheme and etc. To solve these problems, the standard communication protocol for railway signaling is designed. The structure of designed communication protocol and the results of performance analyses are represented in this paper. It will be expected the increase of safety, reliability and efficiency of maintenance of signaling system by using of the designed communication protocol for railway signaling.

Relationship Between Nursing Organizational Structure and Nursing Outcome (간호 조직구조와 간호결과의 관계)

  • Lee, Eun-Ju
    • Journal of Korean Academy of Nursing Administration
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    • v.10 no.1
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    • pp.37-48
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    • 2004
  • Purpose: This study was investigated to identify the relationship among hospital nursing organizational structure(decentralization, communication, bed/nurse ratio), process(nurses' job satisfaction, nurses' clinical experiences, nurses' unit experiences), and nursing outcome(patient satisfaction, physiologic adaptation, length of stay, number of complication). Method: The subjects consisted of 86 hysterectomy patients and 23 nurses in gynecology unit. Data were collected from May 16, 2002 to August 15. 2003 by the structured questionnaires and chart review. Data analysis was done with ANOVA, Pearson's correlation coefficient, path analysis. Result: Relationship between organizational structure and process ; Bed/nurse ratio was negatively related to nurses' job satisfaction(r=- .37, p<.05), and nurses' clinical experience(r=- .69, p<.00). Decentralization(r=.42, p<.05) and comunication(r=.61, p<.00) were positively related to nurses' clinical experiences. Relationship between process and nursing outcome ; There was a significant relationship between nurses' unit experiences and patient satisfaction(r=.63, p<.00), nurses' job satisfaction and physiologic adaptation(r= .44, p<.05), nurses' unit experiences and physiologic adaptation(r=.64, p<.00), Relationship between organizational structure and nursing outcome ; Decentralization and communication were positively related to patient satisfaction(r=.86, p<.00 ; r=.88, p<.00) and physiologic adaptation(r=,51, p<.01, r=.64, p<.00). Conclusion: Nurses' unit experience, communication, decentralization were significant variables for patient satisfaction. Nurses' unit experience, nurses' job satisfaction, communication were significant variables for patient physiologic adaptation.

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The Study on the Design of the Function and Data Structure for Electronic Watt-Hour Meters (원격검침을 위한 전자식 전력량계 기능과 데이터구조 설계에 관한 연구)

  • Jang, M.J.;Hyun, D.H.;Cho, S.K.
    • Proceedings of the KIEE Conference
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    • 2001.07a
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    • pp.308-310
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    • 2001
  • With the development of Computer & Communication Technology, nowadays many people are interested in remote metering, and many vendors are suggesting various remote metering solutions. KEPCO (Korea Electric Power Corporation) adopts some of these to some customers who uses a lot of electric power, also continues researching them. But, currently used electronic watt-hour meters vary in terms of communication protocol and data structure by the vendors. So we have to know each vendor's communication protocol and data structure to construct a remote metering system, or to find problems in it. But that's impossible to know each vendor's protocol and data structure because they are reluctant to tell those to outside the company. To solve these problems and to make a much more cost-effective metering system, KEPCO developed standard communication protocol between meters and PC (or metering server), and defined standard functions and data structure which can be used by everyone easily. Those developments support standard interface for every vendors' meters. And Those will be adopted by KEPCO for a part of a new metering standard for electronic watt-hour meters.

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Heat Conduction Analysis of Metal Hybrid Die Adhesive Structure for High Power LED Package (고출력 LED 패키지의 열 전달 개선을 위한 금속-실리콘 병렬 접합 구조의 특성 분석)

  • Yim, Hae-Dong;Choi, Bong-Man;Lee, Dong-Jin;Lee, Seung-Gol;Park, Se-Geun;O, Beom-Hoan
    • Korean Journal of Optics and Photonics
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    • v.24 no.6
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    • pp.342-346
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    • 2013
  • We present the thermal analysis result of die bonding for a high power LED package using a metal hybrid silicone adhesive structure. The simulation structure consists of an LED chip, silicone die adhesive, package substrate, silicone-phosphor encapsulation, Al PCB and a heat-sink. As a result, we demonstrate that the heat generated from the chip is easily dissipated through the metal structure. The thermal resistance of the metal hybrid structure was 1.662 K/W. And the thermal resistance of the total package was 5.91 K/W. This result is comparable to the thermal resistance of a eutectic bonded LED package.

Partial H-plane Filter with Periodic Structure (주기 구조를 이용한 Partial H-plane Filter)

  • Kim Dong-Jin;Chung Woo-Sung;Lee Jeong-Hae
    • The Journal of Korean Institute of Electromagnetic Engineering and Science
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    • v.17 no.8 s.111
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    • pp.746-752
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    • 2006
  • In this paper, a compact partial H-plane filter with periodic structure is proposed. Guided wavelength of periodic structure' is reduced by slow wave effect. Cross-section and length of partial H-plane filter with periodic structure are considerably reduced by 75% and 30%, respectively, as compared with conventional E-plane filter. In addition, spurious responses of the bandpass filter are improved. To design bandpass filter with periodic structure, we have analyzed a periodic structure of partial H-plane waveguide and derived equations of the periodic filter. Measured results are in good agreement with simulated results.