DRAM에서의 고전압 발생기

김필중,윤중현,라경태,김경호 木浦大學校 情報産業硏究所 1999 情報産業硏究誌 Vol.7 No.-

Abandoned bad DRAM chips have increased by 1-2 bit defective cells after package with high integrated memory. To repair this 1-2 bit defective cells. an antiques repair method of electrical repair method is using instead of laser repair method. This antiques repair method require high voltage over 7v to program antiques element. In this paper, the high voltage generated in chip without added pin or pad. The high voltage generator was designed using not conventional MOS devices but pn diodes and stacked comb capacitors. Threshold voltage of pn diode is about 0.8v. and stacked comb capacitor have much capacitance of 5-6 times than conventional planar capacitor. The output voltage of designed high voltage generator are 7.4-8.4v. and the output current driveability is maximum 480㎂.

채널간 파장간격 Δλ=2nm인 4채널 WDM 광소자 설계 및 특성에 관한 연구

라경태,김필중,윤중현,김상덕,김종빈 조선대학교 전자정보통신연구소 2000 電子情報通信硏究所論文誌 Vol.3 No.1

WDM/FDM is expected to be a basic technology for constructing cost-effectively high-speed and large capacity optical networks in the future, device technologies for supporting WDM/FDM function have begun to be studied actively In this paper, we proposed a 4 channel WDM optical device and simulated it based on Mach-Zehnder Interferometer with channel spacing Δλ=2nm at central wavelength λ =1 55㎛. So, we assumed initial condition that core dimension, 6㎛×6㎛, core index, 1 455, clad index, 1 444 at wavelength 1 55㎛, and the separation between channel waveguides, 4㎛ From this condition, we analyzed a channel waveguide and optical coupler(3㏈ coupler), simulated a single Mach-Zehnder Interferometer, and then designed a 4 channel WDM

엔진 냉각계의 방열량 해석에 관한 연구(Ⅰ)

원종필,방청세,마상용,박경석 慶熙大學校 1997 論文集 Vol.26 No.-

The higher output levels attained by automotive engines recently been accompanied by an increase in the amount of heat released by the engine. This higher heat release level has caused the thermal load in the engine compartment to rise. As a result, greater emphasis has been placed on thermal analysis of heat radiation from the radiator and of heat release from the engine. Heat release the coolant from the engine is released with heat transfer. It is. thus, the essential element to analysis of heat transfer process in cooling system for an automotive engine. However, most of the research about heat release to the coolant is performed from the standpoint combustion, so this research is done from the standpoint of heat transfer to the cooling system including the engine coolant. This study is performed on the analysis of heat release chracteristics in cooling system for an automotive engine according to the operating and cooling conditions. The results are summarized as follows: 1. The heat release is increased according as coolant temperature is decreased and coolant flowrate is increased. 2. The heat release is increased and heat release per power is decreased according as engine is increased with same engine speed. 3. The heat release is increased by increasing fuel comsumption according as engine speed increased.

S.I. 엔진의 써모스텟인자가 엔진 냉각수온도에 미치는 영향

김물시,원종필,박경석 慶熙大學校 大學院 1993 高凰論集 Vol.12 No.-

This paper reviews the need for engine cooling to maintain stable working and engine performance. It is well known that the quantity of emissions, fuel consumption and torque are affected by engine temperature for an automotive engine. Coolant temperature is measured at some locations. Parameters which are necessary for the optimum design of thermostat to maintain the best engine performance are determined. And factors that cause coolant temperature unstable are determinded. The duration of hunting phenomenon(unstable coolant temperature variation) is studied.

Tissue-specific Regulation of Calbindin-D<SUB>9κ</SUB> Gene in Transgenic Mouse

Hye Kyoung Song,Joo-Hyoung Kang,Kun Yeong Lee,Jae-Hoon Choi,Sun Ja Cho,Young-Han Ryu,Eun-Young Kim,Seung Phil Park,Hye Jin Kim,Eun-Kyoung Kim,Yun Jeoung Seo,Sung Kyu Park,Goo Taeg Oh(오구택) 한국실험동물학회 2004 한국실험동물학회 학술발표대회 논문집 Vol.2004 No.-

HSP70 Is Involved in the Radioadaptive Response : Results from Mouse Splenocytes

Park, Kyoung-Phil,Cho, Chul-Koo,Seo, Jeong-Sun,Park, Woong-Yang,Lee, Su-Jae,Leea, Yun-Sil 대한방사선 방어학회 2002 방사선방어학회지 Vol.27 No.4

In continuation of our earlier study on the involvement of heat shock protein (HSP) 25 and HSP70 in the induction of adaptive response, we have now examined the involvement of these proteins in the induction of the adaptive response, using an animal model system. C57BL6 mice were irradiated with 5 cGy of gamma radiation 3 times for a week (total of 15cGy) and a high challenge dose (6Gy) was given on the day following the last low dose irradiation. Survival rate of the low dose pre-irradiated mice was increased to 30%. Moreover, high dose-mediated induction of apoptosis was also reduced by low dose pre-irradiation. To elucidate any link existing between HSP and induction of the adaptive response, reverse transcriptase (RT)-polymerase chain reaction (PCR) analysis was performed using splenocytes. High dose radiation up-regulated the expression of HSP25 and especially HSP70; while expression of other HSPs such as HSC70, HSP90, and a?-crystalline did not change. When splenocytes from HSP70 transgenic mice were pre-irradiated with a low dose of radiation, a reduction in cell death by high dose radiation was observed. These results, suggest that HSP70 is a key molecule in the induction of adaptive response.

Informal Learning during the Early Career CRISIS of Entry-Level Youth Workers as Public-Sector Temporary Employees in the Republic of KOREA

Joo Kyoung-phil J-INSTITUTE 2017 International Journal of Crisis & Safety Vol.2 No.3

In Korea, various initiatives for youth development are the social driver for building a sustainable society by means of the public investment for next generations. The national need to make the society sustainable has been especially salient in Korea as it has accomplished both economic and democratic development in an unprece-dented pace since the Korean War. Youth work has been institutionalized with the foci on protection and welfare of youth as well as various activities for youth. In the national youth work, youth workers play a key role in implementing youth policies and delivering programs and services for young people. However, the labor marker for entry-level youth workers is far from favorable. Korean youth work agencies such as youth community centers, youth cultural centers, and youth shelters hold less and less capacity to ac-commodate newcomers, given the recent recession of national youth work. Due to the limited budget and the unstable market of youth work, the job security of entry-level youth workers in Korea has become more insecure than ever since the Korean government initiated the national youth work. In this career context, even for those who fortunately got some positions in the field of youth work, their career path is vulnerable from the beginning. This early career crisis of entry-level Korean youth workers reflects various aspects of the public-sector labor structure in Korea. At the same time, entry-level youth workers’ understanding of their career and life also illu-minate how individual needs and expectations collide with socio-cultural structures and norms in the Korean society. This gap between the personal agency and the societal organization can be further examined along with the conception of informal learning. The purpose of this exploratory study is to illuminate entry-level youth workers’ informal learning about self-identity and career though their job experiences. The study takes a phenomenological approach, a qualitative research method to delve into the nature of a phenomenon, to designing the methodological framework. Through a qualitative data analysis, the research identified a number of open codes that converged into eight categories and three major themes. Subsequently, the analysis results were interpreted along with three activity systems that was constructed upon the three major themes and attendant categories and codes. What and how the entry-level youth workers learn informally on the job emerged from the methodological application of CHAT to their experiences and perceptions. Therefore, this study entails the theoretical implications of CHAT for examining informal learning in the workplace, highlighting its integrative approach to the job inse-curity and the early career crisis of Korean entry-level youth workers.

일터학습을 위한 논리주도 성과평가 개념화 연구

주경필 ( Kyoung Phil Joo ) 고려대학교 HRD정책연구소 2019 휴먼웨어 연구 Vol.2 No.2

본 연구에서는 조직 내 일터학습 관련 실천이 효과적이고 정확하게 평가되기 위해서 논리주도 성과평가의 필요성을 제기한다. 따라서 개념적 연구를 통해서 일터학습 관련 실천을 위한 논리주도 성과평가의 이론적 기초를 정립하고, 이렇게 마련된 평가모델을 일터학습 관련 실천의 책무성과 타당성을 향상시키는 대안으로 제시하는 것이 본 연구의 목적이다. 연구의 주요 내용은 크게 두 부분으로 구성되었다. 첫째는 일터학습에서 평가의 주요 요소와 특성을 살펴보는 것이고, 둘째는 논리주도 성과평가에 관한 선행연구 고찰 및 개념화이다. 여기서는 논리주도 성과평가를 가장 기초적인 수준에서 다루었다. 다시 말해, 이 분야의 선행연구 고찰을 통해서 논리주도 성과평가의 개념화에 가장 주요하게 영향을 미치는 요소를 규명하고, 그 시사점과 활용가능성 및 의의를 논의하는 것을 중심으로 연구가 수행되었다. 본 연구의 결과로 제시된 논리주도 성과평가 모델은 일터학습 관련 프로그램 운영이나 개입활동을 평가를 보다 체계적이고 논리적으로 수행하는데 기초가 될 것이다. In organizations, a pressing need exists for theory-driven outcome evaluation of the workplace learning practice. This conceptual study aims at exploring theoretical foundations of theory-driven outcome evaluation for workplace learning and regarding this model as an alternative for improving the accountability and validity of workplace learning interventions. The study mainly consists of two parts: 1) an overview of key facets of evaluation in workplace learning, and 2) theory-driven outcome evaluation. This article examines theory-driven outcome evaluation at the most basic level. In other words, based on a review of existing literature in this area, this article presents a model that identifies elements that most significantly influence the conceptualization of theory-drvien outcome evaluation. The theory-driven outocme evaluation model provides the theoretical basis on which the workplace learning practice can be evaluated both systematically and logically.

원격고등교육을 위한 스마트캠퍼스 구축 사례연구

주경필 ( Kyoung-phil Joo ) 고려대학교 HRD정책연구소 2020 휴먼웨어 연구 Vol.3 No.2

정보통신기술의 발달과 함께 국립 한국방송통신대학교는 기술 혁신을 위한 자체 “스마트캠퍼스구축 TF팀”을 구성하였다. 이 TF팀은 스마트캠퍼스 구축을 위한 몇 가지 상세한 부분에 대한 계획을 세우고 원격고등교육기관으로서 한국방송통신대학교가 급속히 변화하는 환경에 부합하기 위한 마스터플랜을 개발하였다. 이 논문은 한국방송통신대학교가 외부 수요에 대응하여 스마트캠퍼스 설계를 위해 어떻게 마스터플랜을 세웠는지에 관한 구체적인 내용을 담고 있다. 질적 사례연구방법을 활용하여 이 연구에서는 TF팀이 수행한 절차와 결과를 기술하였다. 결과적으로 TF팀은 한 개의 비전, 세 개의 목표, 네 개의 주요 과제를 대학이 스마트캠퍼스로 변화하기 위한 방향으로 마스터플랜에 포함시켜야 할 내용으로서 도출하였다. 한국방송통신대학교의 사례는 원격고등교육 기관이 효과적으로 새로운 정보통신기술을 적용하여 스마트학습의 개념을 고려해야 하는 방식에 대해서 조명한 것으로, 다른 원격고등교육 기관의 기술혁신을 위한 기초자료가 될 수 있을 것이다. Along with the development of information and communication technolgies, Korea National Open University (KNOU) configured its own task force team, named “Smart Campus TF/T”, for technological innovation. The TF/T has developed a master plan to adapt to the fast-changing environment, identifying several objectives to establish a smart campus. This article elaborates the ways in which KNOU has responded to various external needs by creating the master plan in designing a smart campus. Using a qualitative-case-study approach, this study outlines the procedures through which the TF/T developed the master plan and its specific outcomes: one vision, three objectives and four major areas to transform the university into a smart campus. This study illuminates the ways in which an institution of open and distance higher education applies new information and communication technologies to development of a smart campus.

운전조건 변화가 CO₂ 자동차 에어컨 시스템의 냉방성능에 미치는 영향에 대한 실험적 연구

이준경(Jun Kyoung Lee),이동혁(Dong Hyuk Lee),이헌균(Heon Kyun Lee),원종필(Jong Phil Won),최규정(Kyu Jung Choi),주필호(Phil Ho Ju),이원석(Won Suk Lee),최동기(Dong Ki Choi) 한국자동차공학회 2006 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-

This paper deals with the research for the effects of the operating parameters that could be used for a transcritical CO₂ mobile air-conditioning system on the cooling performance. It presents experimental results for the performance characteristics of a CO₂ mobile air conditioning system with various operating conditions such as different gas cooler inlet pressures and frontal air velocities/temperatures passing through the evaporator and the gas cooler. Experimental results show that the cooling capacity was more than 5㎾ and coefficient of performance (COP) was more than 2.1, also. Therefore, we checked that the mobile air-conditioning system using CO₂ has good cooling performance compared to that using HFC-134a.