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System of Culture Satellite Account (문화위성계정 체계)

  • Kim, Ji-Young
    • Communications for Statistical Applications and Methods
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    • v.17 no.6
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    • pp.879-889
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    • 2010
  • In this paper I summarize the compiling method of culture satellite account which has been recommended by international statistic organizations, and I suggest the required statistics which is need to compile Korean culture satellite account. Culture satellite account is recommended to be composed of five modules and each module has to has its specific function respectively. The first module is macro-information module, the second module is quantity/volume output module, the third module is characterization module, the fourth module is targeted analysis/analytical module, and the fifth module is documentation module. Each module is recommended to contain cultural demand and supply statistics of respective module from the first module to the fourth module.

Reconfiguration of PV Module Considering the Shadow Influence of Photovoltaic System (태양광 발전시스템의 그림자 영향을 고려한 PV 모듈의 재구성)

  • Ko, Jae-Sub;Chung, Dong-Hwa
    • Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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    • v.27 no.2
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    • pp.36-44
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    • 2013
  • This paper proposes the reconfiguration of PV module considering shadow influence of photovoltaic system. The PV system is consisted series-parallel connection of PV module. The voltage and current between PV modules become unbalance when shadow occurs to PV module. If shadow occurs to the series connection PV module, the output current is limited to current of shaded PV module. Also if shadow occurs to the parallel connection PV module, the output voltage is limited to voltage of shaded PV module. These problems are caused power loss. Therefore, the PV module in this paper consist using the fixed module and variable module by shaded conditions. The reconfiguration of PV module can compensates the shadow influence by changing connection of a variable module when shadow is occurred to PV module. A validity of the reconfiguration of PV module proposed in this paper proves through comparing with performance of conventional PV module.

Design and Implementation of DMA priority section module (DMA Priority selection module 설계 및 구현)

  • Hwang, In-Ki
    • Proceedings of the KIEE Conference
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    • pp.264-267
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    • 2002
  • This paper proposed a effective priority selection algorithm named weighted round-robin algorithm and show the implementation result of DMAC priority selection module using prosed weighted round-robin algorithm. I parameterize timing constraints of each functional module, which decide the effectiveness of system. Proposed weighted round-robin algorithm decide the most effective module for data transmission using parameterize timing constraints and update timing parameter of each module for next transmission module selection. I implement DMAC priority selection module using this weighted round-robin algorithm and can improve the timing effective for data transmission from memory to functional module or one functional module to another functional module.

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Research on operation stability of 7kW Inverter for short distance vehicle using SiC Hybrid module (SiC 하이브리드 모듈을 적용한 근거리용 7kW Inverter 동작 안정성에 대한 연구)

  • Jeon, Joon-Hyeok;Kyoung, Sin-Su;Kim, Hee-Jun
    • The Journal of Korea Institute of Information, Electronics, and Communication Technology
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    • v.12 no.5
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    • pp.499-506
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    • 2019
  • This paper is concerned with the operating stability of 7kW inverter using SIC hybrid module and verifies the validity of the simulation results by comparing the result of the loss equation and the simulation result, Simulation results using Si module and SiC hybrid module are compared to compare switch loss and diode loss. Through the loss equation calculation, the conduction loss of SiC Hybrid module is 168W, switching loss is 9.3W, diode loss is 10.5nW, When compared with the simulation results, similar values were shown. As a result of comparing the simulation results of the Si module and the SiC Hybrid module, The total device loss of the Si module was 246.2W, and the total device loss of the SiC Hybrid module was 189.9W. The loss difference was 56.3W, which was about 0.8W. thereby verifying the reverse recovery characteristics of the SiC SBD. In addition, temperature saturation test was conducted to confirm the stability of SiC Hybrid module and Si module under high temperature saturation, In the case of the Si module, the output power was stopped at 4kW, and the SiC Hybrid module was confirmed to operate at 7kW. Based on this, an efficiency graph and a temperature graph are presented, and the Si module is graphed up to 4kW and the SiC Hybrid module is graphed up to 7kW.

ON SOME PROPERTIES OF MALCEV-NEUMANN MODULES

  • Zhao, Renyu;Liu, Zhongkui
    • Bulletin of the Korean Mathematical Society
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    • v.45 no.3
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    • pp.445-456
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    • 2008
  • Let M be a right R-module, G an ordered group and ${\sigma}$ a map from G into the group of automorphisms of R. The conditions under which the Malcev-Neumann module M* ((G)) is a PS module and a p.q.Baer module are investigated in this paper. It is shown that: (1) If $M_R$ is a reduced ${\sigma}$-compatible module, then the Malcev-Neumann module M* ((G)) over a PS-module is also a PS-module; (2) If $M_R$ is a faithful ${\sigma}$-compatible module, then the Malcev-Neumann module M* ((G)) is a p.q.Baer module if and only if the right annihilator of any G-indexed family of cyclic submodules of M in R is generated by an idempotent of R.

A study on the EDOF(Extended depth of field) camera module performance optimization (EDOF 카메라 모듈의 성능 최적화에 대한 연구)

  • Choi, Kyung-Hoon;Kim, Young-Gil
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • pp.313-315
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    • 2011
  • Smart phone camera module are mounted on the focus are 2 types depending on the behavior. AF (Auto focus) camera module and the FF (Fixed focus) camera module two are different types. AF camera module to move the location of the lens and is a way to automatically focus, FF camera module lens position of the focus is the way to a fixed state. EDOF camera module the location of the lens as a frozen state EDOF AF module using the algorithm to focus on applied technology is a module. In this paper, optimization EDOF camera module implementation of the resolution.

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INVERSE POLYNOMIAL MODULES INDUCED BY AN R-LINEAR MAP

  • Park, Sang-Won;Jeong, Jin-Sun
    • Bulletin of the Korean Mathematical Society
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    • v.47 no.4
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    • pp.693-699
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    • 2010
  • In this paper we show that the flat property of a left R-module does not imply (carry over) to the corresponding inverse polynomial module. Then we define an induced inverse polynomial module as an R[x]-module, i.e., given an R-linear map f : M $\rightarrow$ N of left R-modules, we define $N+x^{-1}M[x^{-1}]$ as a left R[x]-module. Given an exact sequence of left R-modules $$0\;{\rightarrow}\;N\;{\rightarrow}\;E^0\;{\rightarrow}\;E^1\;{\rightarrow}\;0$$, where $E^0$, $E^1$ injective, we show $E^1\;+\;x^{-1}E^0[[x^{-1}]]$ is not an injective left R[x]-module, while $E^0[[x^{-1}]]$ is an injective left R[x]-module. Make a left R-module N as a left R[x]-module by xN = 0. We show inj $dim_R$ N = n implies inj $dim_{R[x]}$ N = n + 1 by using the induced inverse polynomial modules and their properties.

A Study of the Development of a Radial Pleat Module for Low Pressure Using an Ultrafiltration Membrane

  • Seo, Il-Gun;Shin, Se-Jong;Byoung-Ryul;Song, Hee-Yeol
    • Korean Membrane Journal
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    • v.4 no.1
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    • pp.7-11
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    • 2002
  • A radial pleat module using a polysulfone membrane was developed. The permeation characteristics of the radial pleat module were compared with those of a flat plate module. The average module efficiency of the radial pleat module for the applied pressure range was 82% and was always greater than that of the spiral wound module. For the radial pleat module, in general, as the applied pressure increases, the flux increases and the rejection reduces. The concentration polarization causes the decrease of the flux for the long time operation. But it has been found that the radial pleat module is more efficient for the reduction of the concentration polarization because it has the more effective area per unit volume and can induce the turbulent flow in the module.

EQUIVALENT CONDITIONS FOR A DIRECT INJECTIVE MODULE

  • Choi, Su-Jeong;Han, Chang-Woo
    • The Pure and Applied Mathematics
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    • v.8 no.2
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    • pp.175-183
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    • 2001
  • The purpose of this paper is to find the necessary find sufficient conditions for a module to be a direct injective module. Moreover, we focus on the possibility that a direct injective module can be related with arbitrary module and Hom functor like an injective module.

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Understanding and Designing Teachable Agent (교수가능 에이전트(Teachable Agent)의 개념적 이해와 설계방안)

  • 김성일;김원식;윤미선;소연희;권은주;최정선;김문숙;이명진;박태진
    • Korean Journal of Cognitive Science
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    • v.14 no.3
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    • pp.13-21
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    • 2003
  • This study presents a design of Teachable Agent(TA) and its theoretical background. TA is an intelligent agent to which students as tutors teach, pose questions, and provide feedbacks using a concept map. TA consists of four independent Modules, Teach Module, Q&A Module, Test Module, and Resource Module. In Teach Module, students teach TA by constructing concept map. In Q&A Module, both students and TA ask questions and answer questions each other through an interactive window. To assess TA's knowledge and provide feedback to students, Test Module consists of a set of predetermined questions which TA should pass. From Resource Module, students can search and look up important information to teach, ask questions, and provide feedbacks whenever they want. It is expected that TA should provide student tutors with an active role in learning and positive attitude toward the subject matter by enhancing their cognition as well as motivation.

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