• Title/Summary/Keyword: Sustaining Technology

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Sustaining the Technopolis: The Case of Austin, Texas

  • Gibson, David V.;Butler, John S.
    • World Technopolis Review
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    • v.2 no.2
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    • pp.64-80
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    • 2013
  • In "Creating the Technopolis: High Technology Development in Austin Texas," Smilor, Kozmetsky, and Gibson (1988) make the case that in the mid-1980s Austin was becoming a globally competitive high tech region. Indeed over the years and into 2013, Austin has established its reputation as a leading entrepreneurial and technology center and "talent magnet." Delegations from across the US and worldwide visit Austin to better understand how this central Texas city went from being a state government and university town to become a fast growing, globally competitive, technology hotspot leading the state and nation in job creation. Central to the concept of the Triple Helix and Technopolis Frameworks is the importance of university, business, and government cooperation. This paper gives examples of mechanisms, processes, and metrics on how The University of Texas at Austin; regional technology industry; federal, state, and local government policies; and support groups all contributed to growing and sustaining the Austin Technopolis.

High Frequency and High Luminance AC-PDP Sustaining Driver

  • Choi Seong-Wook;Han Sang-Kyoo;Moon Gun-Woo
    • Journal of Power Electronics
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    • v.6 no.1
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    • pp.73-82
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    • 2006
  • Plasma display panels (PDPs) have a serious thermal problem, because the luminance efficiency of a conventional PDP is about 1.5 1m/W and it is less than $3\~5\;lm/W$ of a cathode ray tube (CRT). Thus there is a need for improving the luminance efficiency of the PDP. There are several approaches to improve the luminance efficiency of the PDP and we adopted a driving PDP at high frequency range from 400kHz up to over 700kHz. Since a PDP is regarded as an equivalent inherent capacitance, many types of sustaining drivers have been proposed and widely used to recover the energy stored in the PDP. However, these circuits have some drawbacks for driving PDPs at high frequency ranges. In this paper, we investigate the effect of the parasitic components on the PDP itself and on the driver when the reactive energy of the panel is recovered. Various drivers are classified and evaluated based on their suitability for high frequency drivers. Finally, a current-fed driver with a DC input voltage bias is proposed. This driver overcomes the effect of parasitic components in the panel and driver. It fully achieves a ZVS of all full-bridge switches and reduces the transition time of the panel polarity. It is tested to validate the high frequency sustaining driver and the experimental results are presented.

A new high efficiency active clamp forward converter suitable for the sustaining power module of a plasma display panel (PDP 유지 전원단에 적합한 새로운 고효율 능동형 클램프 포워드 컨버터)

  • Kim, Tae-Sung;Han, Sang-Kyoo;Moon, Gun-Woo;Youn, Myung-Joong
    • Proceedings of the KIPE Conference
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    • 2005.07a
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    • pp.433-435
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    • 2005
  • A new high efficiency active clamp forward converter suitable for the sustaining power module(SPM) of a plasma display panel (PDP) is proposed. It has a wide zero voltage switching (ZVS) range without inserting additional resonant inductor. Also, it features simpler structure, lower cost, less mass, and no effective duty loss. Furthermore, voltages across all rectifier diodes are clamped on the output voltage, which results in a higher efficiency.

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A new high efficiency splitted sustaining driver for plasma display panel (PDP) (새로운 고효율 플라즈마 디스플레이 패널 분할 서스테인 구동 드라이버)

  • Yi Kang-Hyun;Choi Seong-Wook;Moon Gun-Woo;Park Jung-Pil;Jung Nam-Sung
    • Proceedings of the KIPE Conference
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    • 2006.06a
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    • pp.91-93
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    • 2006
  • A new High Efficiency splitted sustaining driver for Plasma Display Panel (PDP) is proposed. The proposed circuit is suitable for the large screen PDP. The features of the proposed circuit are zen voltage switching (ZVS) of all main power switches, the reduction of reaction power loss for energy recovering, the stable light emission and simple structure.

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Comparative Study on a Single Energy Recovery Circuits for Plasma Display Panels (PDPs)

  • Yi, Kang-Hyun;Choi, Seong-Wook;Moon, Gun-Woo
    • Proceedings of the KIPE Conference
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    • 2007.07a
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    • pp.159-162
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    • 2007
  • Comparative study on a low cost sustaining driver with single and dual path energy recovery circuits for plasma display panels (PDPs) is shown in this paper. The cost of PDPs has been still high and about half of the cost has been occupied by driving circuit. A simple sustaining driver is proposed to reduce the cost and size of driving circuit. The proposed driver has small number of devices and reactive components and there are two methods for charging and discharging PDPs such as single and dual path energy recovery circuits. A comparative research on two-types of energy recovery path is practiced to evaluate performance. As a result, the dual energy recovery path circuit has low power consumption, low surge current and high performance. To verify those results, experiment will be shown with 42-inch HD panel.

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A New Sustaining Driver for AC PDPs with Reduced Sustain Voltage by Half (새로운 유지구동전압 반감형 AC PDP 구동회로)

  • Lim, Seung-Bum;Cho, Pil-Yong;Chae, Soo-Yong;Kang, Kyoung-Woo;Yoo, Jong-Gul;Ko, Jong-Sun;Hong, Sonn-Chan
    • Proceedings of the KIPE Conference
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    • 2005.07a
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    • pp.452-455
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    • 2005
  • This paper proposes a new sustaining driver for AC PDP(Plasma Display Panel), which improves the performance of conventional circuit with reduced sustain voltage such as TERES(TEchnology of REciprocal Sustainer). In the TERES circuit, the sustain voltage is the half of general sustaining driver and there is no energy recovery circuit. The circuit proposed in his paper has an energy recovery circuit and removes surge currents. Although the energy recovery circuit is added, the number of active switching elements is the same as the TERES circuit. The operations of the proposed circuit are analyzed for each mode and its validity is verified by the simulations using PSpice program.

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Factors Influencing on the Attitude toward withdrawal of life-sustaining treatment of Nursing College Students (간호대학생의 연명치료 중단에 대한 태도에 영향을 미치는 요인)

  • Kim, Kyoung-Nam;Kang, Eun-Hee;Kim, Mi-Young
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.20 no.3
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    • pp.429-437
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    • 2019
  • This study was a descriptive study to investigate the factors influencing on attitude toward withdrawal of life-sustaining treatment of nursing students' consciousness of biomedical ethics, good death recognition and meaning of life. The subjects of this study were 293 nursing students attending college at P city. Data were collected for two weeks from May 1, 2018 to May 11, 2018. The statistical method was performed with SPSS WIN 22.0 using a complex sampling analysis, pearson's correlation coefficients, and a multiple regression analysis. The result of this study was significant positive correlation between attitude toward withdrawal of life-sustaining treatment and consciousness of biomedical ethics(r=.266, p<.001), good death recognition(r=.373, p<.001), meaning of life(r=.122, p=.037). The meaning of life was significant positive correlation consciousness of biomedical ethics(r=.294, p<.001), good death recognition(r=.230, p<.001). The good death recognition was significant positive correlation consciousness of biomedical ethics(r=.306, p<.001). Factors Influencing on the attitude toward withdrawal of life-sustaining treatment was good death recognition(${\beta}=.32$, p<.001) and consciousness of biomedical ethics(${\beta}=.16$, p=.004). These factors explained about 16% of the variance. Therefore it is necessary to develop an educational program to positively raise the attitude of consciousness of biomedical ethics and good death recognition.

Effect of good death cognition, self esteem, attitude toward withdrawal of life-sustaining treatment on the consciousness of biomedical ethics of nursing students (간호대학생의 좋은 죽음 인식, 자아존중감, 연명치료 중단에 대한 태도가 생명의료윤리 의식에 미치는 영향)

  • Park, Hyo Jin;Yang, Hyun Joo;Byun, Eun Kyung
    • The Journal of the Convergence on Culture Technology
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    • v.7 no.3
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    • pp.71-78
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    • 2021
  • The purpose of this study was to investigate the effect of good death recognition, self-esteem, attitude toward withdrawal of life-sustaining treatmenton the consciousness of biomedical ethics in nursing students. Data were collected from 154 nursing students in B city and analyzed by t-test, ANOVA, Pearson correlation coefficient, and multiple regression using SPSS/WIN 22.0. The degree of consciousness of biomedical ethics in nursing students was 2.87±0.26. There were significant differences in consciousness of biomedical ethics with respect to religion(t=-2.90, p=.004). There was positive correlation between consciousness of biomedical ethics and good death recognition(r=.27, p=.001), self-esteem(r=.36, p<.001), negative correlation between consciousness of biomedical ethics and attitude toward withdrawal of life-sustaining treatment(r=-.29, p<.001). The factors affecting consciousness of biomedical ethics of the study subjects were good death recognition(β=.26, p<.001), self-esteem(β=.29, p<.001), attitude toward withdrawal of life-sustaining treatment(β=-.30, p<.001), religion(β=-.20, p=.004), with an explanatory power of 28.7%. Through this research requires the fellow study to determine the factors affecting consciousness of biomedical ethics of nursing students.

The Critical Success Factors of the Innovation and Strategy Using Information Technology : Case Study of Hyundai Heavy Industries Co. (정보기술(IT)을 활용한 기업의 혁신 추진 전략과 핵심성공요인 도출 : 현대중공업의 성공사례를 중심으로)

  • Kim, Wha Young
    • Journal of Information Technology Services
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    • v.11 no.4
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    • pp.87-105
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    • 2012
  • The purpose of this case study is to demonstrate the effectiveness of the disruptive innovation strategy based on the Resources Process Values(RPV) theory for a successful firm. Disruptive innovations seemed not initially perform well enough to be sold or used successfully in markets. The products and services used disruptive technologies have not been as effective as those used in the established markets. However, they have other attributes such as simplicity, convenience, and low cost, which appeal to a new, small and initially unattractive set in new or low-end applications. The Hyundai Heavy Industries Co.(HHI) performed the Jubail Industrial Harbour Project(JIHP), which built the Open Sea Tanker Terminal(OSTT) in Saudi Arabia, using the disruptive innovation strategy in order to lower the manufacturing cost of the offshore jacket and to complete the project successfully. The HHI developed the design and drawing systems to manufacture the jacket and also developed the HYundai Jacket Analysis System(HYJAS) software to use the structural analysis against stresses from rolling and pitching of the barge while transporting the jacket by sea.

A New PWM-Controlled Quasi-Resonant Converter for High Efficiency PDP Sustaining Power Module (고효율의 PDP 유지 구동 전원단을 위한 새로운 펄스폭 제어방식의 쿼지 공진 컨버터)

  • Lee Woo-Jin;Choi Seong-Wook;Kim Chong-Eun;Moon Gun-Woo
    • Proceedings of the KIPE Conference
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    • 2006.06a
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    • pp.352-355
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    • 2006
  • A new PWM-controlled quasi-resonant converter for high efficiency PDP sustaining power module is proposed in this paper. The load regulation of the proposed converter can be achieved by controlling the ripple of the resonant voltage across the resonant capacitor with hi-directional auxiliary circuit, while the main switches are operating at the fixed duty ratio and fixed switching frequency. Hence, the waveform of currents can be expected to be optimized on the conduction loss. Furthermore, the proposed converter shows the good ZVS capability, simple control circuits, no high voltage ringing problem of rectifier diodes, no DC offset of the magnetizing current and low voltage stress of power switches. In this paper, operational principles, analysis and design considerations are presented. Experimental results demonstrate that the output voltage can be controlled well by the auxiliary circuit as PWM method.

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