• Title/Summary/Keyword: member information

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Effect of Host Materials on Eelectrophosphorescence Properties of PtOEP-doped Organic Light-emitting Diodes

  • Kang, Gi-Wook;Lee, Chang-Hee
    • Journal of Information Display
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    • v.8 no.2
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    • pp.15-19
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    • 2007
  • We have studied the effect of host materials on the electrophosphorescence properties by comparing three different host materials such as tris(8-hydroxyquinoline)-aluminum (III) $(Alq_3)$, bis(8-hydroxyquinoline)-zinc (II) $(Znq_2)$, and 4,4'-N,N' dicarbazole-biphenyl (CBP) doped with a red-emissive phosphorescent dye, 2,3,7,8,12,13,17,18-octaethyl-21H,23H-porphyrin platinum (II) (PtOEP). The EL spectra show a strong red emission (peak at 650 nm) from the triplet excited state of PtOEP and a very weak emission from an electron transport layer of $Alq_3$ and a hole transport layer of N,N'-diphenyl-N,N'-bis(3-methylphenyl)-1,1-biphenyl-4,4'-diamine (TPD). We find that the triplet exciton lifetime and the quantum efficiency decrease in the order of CBP, $Alq_3$, and $Znq_2$ host materials. The results are interpreted as a poor exciton confinement in $Alq_3$, and $Znq_2$ host compared with in CBP. Therefore, it is very important for the triplet-exciton confinement in the emissive layer for obtaining a high efficiency.

Design and Implementation of Intelligent Society Member Management System (지능형 학회관리 시스템 설계 및 구현)

  • Jo Yung-Ki;Baik Sung-Wook;Bang Kee-Chun
    • Journal of Digital Contents Society
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    • v.5 no.3
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    • pp.205-212
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    • 2004
  • This paper presents a design and implementation example of intelligent society member management system that is constructed to induce various research activity. Based on members data and society activity record, the system executed data mining. In the process of data mining useful society activity rules was produced and in result members could effectively interact with the system. Decision Tree Algorithm was used in the process, which is one of the methods of data mining. We presemts a plan for personalization website to provide user oriented administration policy and dynamic interface by using analyzed information of society activity rules produced.

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Experience after bereavement in main family members making DNR decisions (심폐소생술 금지(Do-Not-Resuscitate) 주 결정 가족원의 사별 후경험)

  • Kim, Myung-Hee;Kang, Eun-Hee
    • The Korean Journal of Rehabilitation Nursing
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    • v.14 no.2
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    • pp.118-128
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    • 2011
  • Purpose: The purpose of this study was to explore the experiences of bereavement for main family members who had made and followed DNR decision for their family members. Method: This qualitative study was based on a grounded theory, and used in-depth interview techniques with the bereaved 10 main family members who had been treated and died under DNR order. Results: The causal condition of the family member was 'Releasing', and the main consequent phenomenon were 'Blaming self and ruminating'. The contextual condition was 'The memory of the deceased'. The action/reaction strategy was 'Purifying'. The intervening condition was 'Supporting system', and the consequence was 'Acceptance'. The experience after bereavement of the family member on DNR decision were rational processes that purified themselves and healed the guilt feeling about the decision from reflective assessment and response about DNR decision. Based on this results, the substantive theory 'Reflective self healing' was derived. Conclusion: The main family members in following DNR decision are more likely to have unhealthy emotional condition than others in normal bereavement process. But they overcame the grief of bereavement through reflective self healing process.

Spectroscopic observation of the massive high-z (z=1.48) galaxy cluster SPT-CL J2040-4451 using Gemini Multi-Object Spectrographs

  • Kim, Jinhyub;Jee, Myungkook J.;Kim, Seojin F.;Ko, Jongwan
    • The Bulletin of The Korean Astronomical Society
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    • v.44 no.1
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    • pp.74.2-74.2
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    • 2019
  • Mass measurement of high-redshift galaxy clusters with high accuracy is important in constraining cosmological parameters. Extremely massive clusters at high redshift may impose a serious tension with the current ΛCDM paradigm. SPT-CL J2040-4451 at z=1.48 is considered one such case given its redshift and mass estimate inferred from the SZ data. The system has also been confirmed to be indeed massive from a recent weak-lensing (WL) analysis. Comparison of the WL mass with the spectroscopic result may provide invaluable information on the dynamical stage of the system. However, the existing spectroscopic coverage of the cluster is extremely poor; only 6 blue star-forming galaxies have been found within the virial radius, which results in highly inflated and biased velocity dispersion. In this work, we present a spectroscopic analysis of the member candidates using Gemini Multi-Object Spectrographs (GMOS) observation in Gemini South. The observation was designed to find early-type member galaxies within the virial radius and to obtain reliable velocity dispersion. We explain our selection scheme and preliminary results of the spectra. We also compare the dynamical mass estimate inferred from the velocity dispersion with the WL mass.

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China's Digital Silk Road in Southeast Asia and Vietnam's Responses from 2015 to 2021

  • Dao D. Nguyen
    • SUVANNABHUMI
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    • v.15 no.2
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    • pp.57-90
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    • 2023
  • China launched the Digital Silk Road (DSR) in 2015 as part of the existing Belt and Road Initiative (BRI) to expand its influence in digital and technological development across Asia, Europe, and Africa. Southeast Asia is one of the key targets of the Digital Silk Road due to its geographical proximity to China and the rapid growth of the digital sphere. Although the DSR opens several potential opportunities for the Association of Southeast Asian Nations (ASEAN) member states to foster the digitalization process in the region, how each country reacts to projects under the DSR is varied. Secondly, Vietnam is the only ASEAN member state that has not signed any official agreement under the BRI framework, and thirdly, Vietnam opted out of Huawei technology. This paper aims to understand the perspective of Vietnam and how Vietnam has responded to the growing technological presence of China in Southeast Asia until 2021. By using qualitative methods, the author argues that the DSR has allowed Beijing to overcome the limitations of the original strategy, BRI, and strengthen its influence in the field of information and communication technologies, particularly fifth-generation (5G) telecommunications. Furthermore, the paper examines Vietnam's digital development and digital diplomacy and how the Vietnamese government has responded to DSR projects. In light of both the potential threats and economic benefits that the DSR has brought to Vietnam and Southeast Asian countries, in the last section, the policy implications for cooperation are discussed.

Comparison of Anonymous Authentication Protocols

  • Kim, Jongseong;Kim, Kwangjo
    • Proceedings of the Korea Institutes of Information Security and Cryptology Conference
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    • 2002.11a
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    • pp.369-372
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    • 2002
  • An anonymous authentication scheme allows a user to identify himself as a member of a group of users in a secure and anonymous way. It seems to be crucial and indispensable components in English auction, electronic voting and open procurement, which are getting very popular business areas in E-commerce. First, we briefly describe the previous anonymous authentication protocols how to work and what cryptographic techniques adopted to increase performance and achieve anonymity. Second, we compare those protocols from the viewpoint of the communication and computation complexity and the specific cryptographic techniques used in their protocols.

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Implementation of Effective Personal Information Management System For Shopping Mall member management (쇼핑몰 회원 관리를 위한 효율적인 개인정보관리 시스템의 구현)

  • Lee, Kwang-Hyung
    • The Journal of Korean Association of Computer Education
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    • v.5 no.3
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    • pp.11-18
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    • 2002
  • It is important to maintain the integrity of the personal information stored duplicately in DBs on the internet sites and to reduce the inconvenience of the user's. So it is useful to develop the integrated-DB supporting the independence of the S/W. In this paper, we investigate the defect of the membership management system on the internet site. Based on the result, we model the personal information management system to manage the membership efficiently, and implement the integrated personal information management system, called IPIMS.

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A Study on the Layout Types of Elementary Schools Library - Focused on the Research.Model Schools - (초등학교(初等學校) 도서실(圖書室)의 공간구성(空間構成)에 대(對)한 연구(硏究) - 연구(硏究).시범학교(示範學校)를 중심(中心)으로 -)

  • Heo, Young-Hwan;Kim, Seung-Geun
    • Journal of the Korean Institute of Educational Facilities
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    • v.10 no.1
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    • pp.15-22
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    • 2003
  • The library of elementary schools, which plays a role in the basic education to grow a responsible social member in an information society and to develop ability for collection, selection, summary, and utilization of various information, could be considered as new educational center. It should be changed to the establishment of informational education for preparing the information society in 21st century through the functional extension of the conventional library as reading and bookstand. Furthermore, it is necessary of trials that converts to the support system for interchange between establishment and student, for preparing educational system of teaching or studying, and for opening establishment to local communities in the future.

An Energy-efficient Clustering algorithm using the Guaranteed Distance for Wireless Sensor Networks (무선 센서 네트워크에서의 에너지 효율을 위한 클러스터링 알고리즘)

  • Kim N.H.;Park T.R.;Kwon W.H.;Chang B.S.;Kim Y.H.;Lee B.Y.
    • 한국정보통신설비학회:학술대회논문집
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    • 2004.08a
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    • pp.382-385
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    • 2004
  • In this paper, a new clustering algorithm using the Guaranteed Distance is proposed. In the new algorithm, the appropriate distribution of clusterheads is accomplished by guarantee the stochastic average distance between clusterhead (CH)s. Using this algorithm, the communication cost from clusterheads to their member nodes and the load variance in each clusterheads are reduced. Therefore, the network lifetime can be extended and the fair energy consumption for all nodes can be achieved.

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Energy Efficient Routing Protocol for Mobile Wireless Sensor Networks (모바일 WSN을 위한 에너지 효율적인 경로배정 프로토콜)

  • Yoo, Jinho;Choi, Sung-Gi
    • The Journal of Korea Institute of Information, Electronics, and Communication Technology
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    • v.8 no.5
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    • pp.405-411
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    • 2015
  • In this paper, we propose routing protocol for mobile wireless sensor networks with a mobile sink in cluster configuration. The proposed protocol extends LEACH-ME by introducing a mobile sink. The mobile sink moves to the cluster head with the highest number of member nodes to collect sensed data from cluster heads within its vicinity, which results in reducing energy consumption in forwarding packets to the sink. The simulation results show that the proposed protocol outperform LEACH-ME in terms of energy efficiency.