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장민혁,김형범,김태옥,양원일,박종안 朝鮮大學校 電子情報通信硏究所 2004 電子情報通信硏究所論文集 Vol.7 No.2
본 연구에서는 관절 내시경 시스템 개발을 목표로 임상 교수들의 조언과 사용자의 편의를 우선으로 하는 PC기반 GUI 형태의 관절 내시경 시스템 설계에 초점을 맞추어 연구하였다. 관절 내시경 시스템의 성능 향상을 위한 모듈 설계하여 검증을 통한 시험 및 시뮬레이션 분석을 하였다. 또한 임상 교수의 관절 내시경 시스템 개발 참여로 사용자 중심의 편리한 시스템 구성 및 관련 H/W 및 S/W 기술 축적뿐만 아니라 PC기반 GUI 형태의 윈도우 S/W 개발로 해외 시장개척을 위한 경쟁력이 강화될 것으로 기대된다.
A Study on the Perception of Abuse Risk among the Elderly using Unstructured Bigdata
장민혁,이규태 한국비교정부학회 2023 한국비교정부학보 Vol.27 No.2
(Purpose) This study aims to propose meaningful implications and policy direction by collecting and analyzing major texts related to the risk of abuse of the elderly from media in portal sites. unstructured bigdata analysis using text mining techniques to confirm the risk perception of abuse among the elderly in a situation where external exposure is reduced during COVID-19 was performed. It is meaningful to prepare effective data for follow-up studies related to the prevention of elder abuse and to present the direction of this kind of study. (Design/methodology/approach) To this end, we used Textome, an unstructured big data analysis solution program, to collect keywords related to the risk of abuse among the elderly using portal sites such as Daum, Naver, and Google. The collection period was set from October 2020 to September 2022, and a total of 8,656 keywords were collected, and a total of 60 key keywords were used in this study by refining unnecessary keywords. (Findings) The results of this analysis are as follows. First, as a result of frequency and TF-IDF analysis, keywords were presented in the order of elderly population, abuse prevention, and suspected abuse. Next, as a result of semantic network analysis using Ucinet 6 and NetDraw, both degree and eigenvector centrality were presented in the order of elderly population, elder abuse, abuse prevention, and suspected abuse. Finally, the CONCOR analysis was divided into six groups: cases and types of abuse, phenomena in an aging society, prevention of abuse of the elderly, support law for the prevention of abuse of the elderly, and prevention of abuse of the elderly. (Research Implications or Originality) Through these analysis results, social issues, major attributes, and keywords related to the perception of abuse risk among the elderly were identified. In addition, it is expected to provide meaningful implications for presenting effective data and suggesting a direction for follow-up research related to elder abuse prevention.
장민혁,강유진,조형근,박초이,심희수,박주일 한국융합학회 2021 한국융합학회논문지 Vol.12 No.2
화석 연료 사용으로 인한 각종 환경오염의 정도가 심화됨에 따라 많은 국가에서 대체 에너지 개발을 위한 투자를 계속해서 진행하고 있다. 대체 에너지 중 하나인 PEMFC는 양극판, 전해질, 가스 확산 층, 전극 네 가지의 주요 구성 요소로 이루어져 있다. 이 중 양극판, 가스 확산 층, 전극은 보편적으로 카본 블랙, 탄소 섬유 등의 탄소 재료를 사용하여 제조한다. 탄소 재료들은 공정비용이 비싸거나 부식 등의 단점이 존재하는데 이를 개선하기 위해 많은 분야에서 연구가 진행되고 있다. 본 논문은 이 세 가지 구성요소들의 단점을 개선하기 위하여 시행된 여러 연구결과들을 취합하여 과거부 터 현재까지의 PEMFC에 어떤 문제점이 있었고 어떻게 개선되어 왔는지를 파악하여 PEMFC 연구 흐름을 파악한다. As the degree of environmental pollution caused by the use of fossil fuels intensifies, many countries continue to invest in the development of alternative energy. PEMFC, one of the alternative energies, consists of four main components: bipolor plate, electrolyte, gas diffusion layer, and electrode. Among them, bipolor plate, the gas diffusion layer, and electrode are generally manufactured using carbon materials such as carbon black and carbon fiber. These carbon materials are expensive in manufacturing process or have disadvantages such as corrosion, and research is being conducted in many fields to improve this. This paper collects several research results conducted to improve the shortcomings of these three components and examines the trends of PEMFC by grasping what problems have been and how they have improved.