• 한국군사과학기술학회지
• /
• 제22권3호
• /
• pp.299-310
• /
• 2019

Increase of combat capability through the lightweighting of vehicles has been internationally issued. One of the methods for lightening is applying high hardness armor(HHA) steel which is outstanding ballistic performance and protection performance compared to weight. Development of HHA steel is currently completed in America, United Kingdom, Australia and Germany. It is used for not only combat vehicle, but also various combat device. Korea is developing new material of HHA steel according to this trend. When such HHA steel is applied to structure, welding process is used for connection of the structure. Cracks from hydrogen embrittlement and cold cracking are easily generated in welds of HHA steel and it greatly affects the strength of all structure. Decrease of strength from welding defect is critical to combat capability. Therefore, welding process optimization is important for performing the role of structure. In this study, international welding technology is reviewed through scientific research paper and patent.

• 산업융합연구
• /
• 제20권6호
• /
• pp.117-123
• /
• 2022

4차 산업혁명시대를 사는 현대인에게 경쟁력과 직결되는 외모는 필수적 자기관리 중 하나로 정착한 가운데 탈모는 헤어스타일 연출의 위해요소로 작용한다. 이렇게 고통 받는 고객을 위한 보다 실용적이고 편리한 가발 제작을 목적으로 정보검색 포털사이트를 통해 연구 대상의 자료를 수집했으며 키워트와 키프리스를 통해 특허출원 동향을 검색하여 가발기술의 시대별 특허동향과 국내 굴지 가발업체의 신소재 개발 동향에 대해 분석하였다. 연구결과 2005년 이전은 가발의 부착과 결속기술, 2006년에서 2013년경은 가발의 인조 모발 관련 제조기술, 2014년 이후는 기능성 관련 가발 기술이 다수 출원된 것으로 나타났다. 그리고 H사와 M사 모두 각자의 특성을 지닌 형상기억 소재와 나노스킨의 신소재 개발 동향을 나타냈다. 본 연구는 가발 산업시장에서 고객에게 편안하고 간편한 착용감을 제공하면서 고객만족까지 도출할 수 있는 기능성 가발 개발의 기초자료로 제공되리라 사료한다.

• Journal of Information Processing Systems
• /
• 제18권3호
• /
• pp.359-373
• /
• 2022

The new crown pneumonia (COVID-19) has become a global epidemic. The disease has spread to most countries and poses a challenge to the healthcare system. Contact tracing technology is an effective way for public health to deal with diseases. Many experts have studied traditional contact tracing and developed digital contact tracking. In order to better understand the field of contact tracking, it is necessary to analyze the development of contact tracking in the field of computer science by bibliometrics. The purpose of this research is to use literature statistics and topic analysis to characterize the research literature of contact tracking in the field of computer science, to gain an in-depth understanding of the literature development status of contact tracking and the trend of hot topics over the past decade. In order to achieve the aforementioned goals, we conducted a bibliometric study in this paper. The study uses data collected from the Scopus database. Which contains more than 10,000 articles, including more than 2,000 in the field of computer science. For popular trends, we use VOSviewer for visual analysis. The number of contact tracking documents published annually in the computer field is increasing. At present, there are 200 to 300 papers published in the field of computer science each year, and the number of uncited papers is relatively small. Through the visual analysis of the paper, we found that the hot topic of contact tracking has changed from the past "mathematical model," "biological model," and "algorithm" to the current "digital contact tracking," "privacy," and "mobile application" and other topics. Contact tracking is currently a hot research topic. By selecting the most cited papers, we can display high-quality literature in contact tracking and characterize the development trend of the entire field through topic analysis. This is useful for students and researchers new to field of contact tracking ai well as for presenting our results to other subjects. Especially when comprehensive research cannot be conducted due to time constraints or lack of precise research questions, our research analysis can provide value for it.

• 한국정밀공학회지
• /
• 제17권3호
• /
• pp.15-21
• /
• 2000

The Intelligent Manufacturing Systems (IMS) Rapid Product Development (RPD) Project is an international partnership formed to build a pre-competitive research and development program that will address the integration of new technologies in manufacturing and provide an infrastructure for industry to cooperate much more closely in the product development cycle. In this explanatory paper, a research trend of the RPD project is briefly presented, together with its background and state-of-the-art, focusing on objectives and target results of its sub-projects which include rapid development of functional parts and tools, validation and reverse engineering, and information logistic system.

• 충북경제 Issue & Trend
• /
• 통권1호
• /
• pp.124-140
• /
• 2007

• 충북경제 Issue & Trend
• /
• 통권1호
• /
• pp.85-91
• /
• 2007

• 광산업정보
• /
• 통권49호
• /
• pp.36-39
• /
• 2008

• 한국산학기술학회논문지
• /
• 제16권11호
• /
• pp.7957-7963
• /
• 2015

전동차 보조전원장치는 차량에 취부되는 냉난방장치, 형광등, 제어장치 등에 전원을 공급하는 중요한 장치이다. 산업용과는 달리 전동차용 보조전원장치는 내진동, 내노이즈성이 우수해야 한다. 또한, 유지보수가 편리하고 경량화된 장치이어야 한다. 여기서는 전동차용 보조전원장치의 국내외 기술개발 내용과 관련 특허분석을 살펴보고, 이를 통해 국내 기술개발 방향을 제시하고자 하였다. 이를 위해 2014년 2월까지의 한국, 일본, 유럽 및 미국 출원(등록) 공개된 특허를 대상으로 WIPS DB를 이용하여 공개 및 등록된 특허를 대상으로 분석을 수행하였다. 먼저, 전력변환기와 변압기로 대분류한 후, 전력변환기는 공진형 DC/DC 컨버터, 공진형 Half bridge 인버터로 구분하였다. 변압기는 고주파 변압기, 페라이트 변압기, 매칭 변압기로 다시 중분류를 수행하였다. 새로운 전동차의 보조전원장치 기술을 성공적으로 개발하기 위해서는 기존 보조전원장치에 대해 철저한 분석이 이루어져야 한다. 이를 위해, 특허를 활용하여 전동차용 보조전원장치에 대한 기술 동향을 분석하여 기술 발전이 어떻게 이루어져왔는가를 살펴보았다. 본 연구를 통해, 향후 보조전원장치 기술 발전 추세가 어떤 식으로 전개가 진행될 것인가를 예측하였다.

• 한국조명전기설비학회:학술대회논문집
• /
• 한국조명전기설비학회 2002년도 학술대회논문집
• /
• pp.369-374
• /
• 2002

This paper presented the development trend of UPS and SPS system has focused on large scale system and more convenient system to maintenance and management. In this paper, we proposed low price and high performance SPSs which can de voltage regulation, harmonic reduction, and capable capacity extension in power. These SPSs are composed by two SPSs in their functional structure, one is power control part including voltage regulation and instant voltage compensaton. The others part is web based monitoring and trend management part for more convenient to SPS operator.

• 한국경영과학회:학술대회논문집
• /
• 한국경영과학회 2001년도 추계학술대회 논문집
• /
• pp.354-357
• /
• 2001

Optical transport has been sucessfully developed as a fast information transfer since 1970s, and a WDM system, based on the wavelength division multiplexing technique, was implemented to the backbone network. The WDM technique is able to improve its data traffic by utilizing its optical fiber efficiently, and is suitable for an easy network operation and management. Therefore, trend for DWDM, which is known to be one of DWM system being currently used, and the direction for optical network development will be investigated in this study.