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NH<sub>3</sub> Plasma Treatment를 사용한 고성능 TFT 제작 및 분석
박희준,이준신,Park, Heejun,Nguyen, Van Duy,Yi, Junsin 한국전기전자재료학회 2017 전기전자재료학회논문지 Vol.30 No.8
The effect of $NH_3$ plasma treatment on device characteristics was confirmed for an optimized thin film transistor of poly-Si formed by ELA. When C-V curve was checked for MIS (metal-insulator-silicon), Dit of $NH_3$ plasma treated and MIS was $2.7{\times}10^{10}cm^{-2}eV^{-1}$. Also in the TFT device case, it was decreased to the sub-threshold slope of 0.5 V/decade, 1.9 V of threshold voltage and improved in $26cm^2V^{-1}S^{-1}$ of mobility. Si-N and Si-H bonding reduced dangling bonding to each interface. When gate bias stress was applied, the threshold voltage's shift value of $NH_3$ plasma treated device was 0.58 V for 1,000s, 1.14 V for 3,600s, 1.12 V for 7,200s. As we observe from this quality, electrical stability was also improved and $NH_3$ plasma treatment was considered effective for passivation.
Design of High-Gain Signal Amplifier Circuit for Prompt-Response Self-Powered Neutron Detector
박희준(Heejune Park),노명규(Myounggyu D. Noh),박영우(Young-Woo Park) Korean Society for Precision Engineering 2022 한국정밀공학회지 Vol.39 No.5
Self-Powered neutron detectors (SPND) detect current generated from interaction of neutron flux with emitter materials. They are inside a reactor in NPP (Nuclear Power Plant), and currently used to monitor the output and control the operation. Since the signal level of prompt-response SPND is very small (-nA), an analog circuit is necessary to amplify the current signal, and to convert it into voltage. This circuit needs to perform an anti-aliasing function to reduce distortion at the stage of digital conversion. In this paper, a systematic design process for high-gain amplification circuit is presented. Based on error analysis of the circuit, parameters are selected to satisfy design requirements. A third-order anti-aliasing filter is designed. A prototype circuit is built. Measured performance of the circuit confirms that the circuit satisfies all design requirements and validates the efficacy of the design to be used in practical environments.
박희준(Park Heejune) 부산대학교 인문학연구소 2022 코기토 Vol.- No.97
메타버스를 포함한 기술 장치 및 응용 프로그램은 건강과 웰빙을 증진하기 위한 도구로 보건ㆍ의료 연구 및 재활에서 점점 더 많이 사용되고 있다. 그러나 메타버스가 의사소통장애가 있는 사람들의 의사소통을 향상시킬 수 있는 가능성을 조사하는 연구는 제한적이다. 이 리뷰에서는 메타버스를 신체적, 심리적, 의사소통 개입을 개선하거나 개발하기 위해 적용하는 여러 논문들이 보고되고 있다. 의사소통장애가 있는 사람들을 위한 언어재활사의 평가 및 중재를 제공하기 위해 비몰입 가상 환경을 사용하는 것은 가상 환경에서 실제 환경으로 기능적 의사소통기술의 이전에 대한 새로운 증거와 함께 긍정적인 결과를 보여주었다. 그러나 의사소통장애 실습 및 연구에서 메타버스 기술과 몰입형 가상 환경의 사용은 신중하게 고려되어야 하는 안전 및 윤리적 문제를 야기한다. 메타버스를 사용한 연구는 언어재활 분야에서 초기 단계에 있다. 다른 의료 분야의 초기 연구에 따르면 메타버스는 현실 세계에 일반화할 수 있는 기능적 기술을 구축하기 위해 몰입형 대화형 교육을 제공하는 매력적인 수단이다. 신기술의 도입은 연구윤리와 환자의 안전에 대한 세심한 배려가 필요하지만, 미래의 메타버스 의사소통장애 연구는 학제간 팀과 기술 전문가의 적절한 참여로 안전하게 진행될 수 있을 것이다. Technology devices and applications, including Metaverse, are increasingly used in healthcare research and practice as tools to promote health and wellbeing. However, there is limited research examining the potential for Metaverse to enable improved communication for people with communication disabilities. This review reveals an emergent body of literature applying Metaverse to improve or develop physical, psychological, and communication interventions. Using non-immersive virtual environments to provide speech-language pathology assessment or intervention for people with communication disabilities has demonstrated positive outcomes, with emerging evidence of the transfer of functional communication skills from virtual to real-world environments. However, using Metaverse technology and immersive virtual environments in communication disability practice and research introduces safety and ethical issues that must be carefully considered. Research employing Metaverse is in its infancy in the field of speech-language pathology. Early evidence from other healthcare disciplines suggests that Metaverse is an engaging means of delivering immersive and interactive training to build functional skills that can be generalized to the real world. While introducing new technology requires careful consideration of research ethics and patient safety, future Metaverse communication research could proceed safely with the adequate engagement of interdisciplinary teams and technology specialists.