• 한국조명전기설비학회:학술대회논문집
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• 한국조명전기설비학회 2008년도 추계학술대회 논문집
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• pp.65-67
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• 2008

일본 홋카이도 도야코에서 2008년 7월 열린 주요 8개국(G8) 정상회의에서는 2050년까지 전 세계 온실가스 배출량을 절반으로 줄이는 장기 목표론 추진하기로 했다. 본 논문은 D 발전소의 중유 연소에 따른 비용과 LNG 연소에 따른 비용이 같아지는 ton 당 $CO_2$ 배출비용을 찾고자 한다.

• 정보관리학회지
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• 제25권1호
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• pp.173-190
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• 2008

저자동시인용분석 기법은 특정 분야의 연구 주제와 동향을 파악하는 수단으로 널리 사용되어왔다. 그러나 저자동시인용분석 기법은 인용 지체 현상 때문에 최근 동향을 나타내거나 활동적인 현역 연구자를 파악하기에는 다소 한계가 있음이 알려져 있다. 이 연구에서는 최신 연구 동향을 분석함과 동시에 활동적인 연구자를 파악하기위한 새로운 방법으로 서지적 저자결합분석 기법을 제안한다. 이 기법은 Kessler가 제안한 서지결합에 기반을 두되 분석 단위를 문헌이 아닌 저자로 삼고 있다. 즉 서지적 저자결합분석 기법은 같은 저자를 인용하는 저자끼리는 연구 주제가 유사할 것이라는 가정에 근거한 분석 기법이다. 저자동시인용분석 기법을 사용한 기존 연구의 분석 결과를 서지적 저자결합분석을 적용한 경우와 비교해 본 결과, 제안된 기법이 저자동시인용분석 기법에 비해서 최근 연구 동향을 더 잘 반영하며 활동적인 현역 연구자 위주의 해석을 가능케 하는 것으로 나타났다.

• 한국융합학회논문지
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• 제8권9호
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• pp.199-209
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• 2017

본 연구는 줄기세포분야의 융합연구 형태와 각 영역별 연구자의 역할을 확인하기 위해 사회네트워크분석을 수행하였다. 자료는 PubMed 데이터베이스에서 1996년부터 2012년까지 만능유도줄기세포와 배아줄기세포를 주제로 발표된 270편의 논문과 성체줄기세포와 중간엽줄기세포 영역의 580편 논문을 추출하였다. 각 영역의 논문에서 공저자 515명과 1,515명을 추출하여 분석하였다. 분석 방법은 사회네트워크분석으로 연결정도중심성, 매개중심성을 확인하고 공저자 네트워크를 구현한 후 연구자의 역할을 확인하였다. 분석결과 공저자 네트워크 상 성과가 높은 핵심 연구자와 중개 연구자를 확인할 수 있었다. 핵심 연구자는 연결정도중심성은 높지만 매개중심성이 높지 않을 수 있으며, 연결정도중심성은 낮으나 매개중심성이 높아 연구자를 연결시키는 중개 연구자를 확인하였다. 공저자 네트워크분석은 분야별 핵심 연구자를 찾아 공동연구를 수행하여 성과를 향상시키고, 연구개발과제 심사를 위한 분야별 전문가 추천을 위한 객관적 자료로 활용이 가능할 것이다.

• 한국컴퓨터정보학회논문지
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• 제28권4호
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• pp.53-63
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• 2023

과학기술 문헌을 활용한 계량정보분석에서 학과정보의 활용은 매우 유용하다. 본 논문에서는 국내 과학기술 분야 학술지 논문에 출현하는 대학기관 소속 저자의 학과정보 선별, 데이터 정제와 학과유형 분류 처리 과정을 통해 학과정보 데이터셋을 구축하고 학습데이터와 검증데이터로 이용하여 딥러닝 기반의 자동분류 모델을 구현하였다. 또한 학과정보 데이터셋과 국내 학술지 저자소속 정보를 활용하여 컴퓨터 분야의 공저 구성 현황과 네트워크를 분석하였다. 연구결과, 자동분류 모델은 한글 학과정보 기준 98.6% 정확률을 보였으며 컴퓨터 분야 연구자들의 공저 패턴과 기관유형, 지역, 기관, 학과유형 측면별 공저 네트워크의 속성과 중심성이 자세히 파악되고 맵으로 시각화되었다.

• 한국정보디스플레이학회:학술대회논문집
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• 한국정보디스플레이학회 2007년도 7th International Meeting on Information Display 제7권1호
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• pp.145-148
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• 2007

The authors report on the fabrication of thin film transistors (TFTs) that use amorphous indium-gallium-zinc oxide (a-IGZO) channel and have the channel length (L) and width (W) patterned by dry etching. To prevent the plasma damage of active channel, a 100-nm-thckness $SiO_{x}$ by PECVD was adopted as an etch-stopper structure. IGZO TFT (W/L=10/50${\mu}m$) fabricated on glass exhibited the high performance mobility of $35.8\;cm^2/Vs$, a subthreshold gate voltage swing of $0.59V/dec$, and $I_{on/off}$ of $4.9{\times}10^6$. In addition, 4.1” transparent QCIF active-matrix organic light-emitting diode display were successfully fabricated, which was driven by a-IGZO TFTs.

• Tribology and Lubricants
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• 제19권3호
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• pp.151-158
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• 2003

In metal cutting at the tool-chip interface, friction generates considerable amount of heat. Thus, the knowledge of wear properties of cutting tool material in high temperature has been as one of important factors in need of clarification. The authors presented the wear properties of 5%Co-5%V-1%Nb high speed steel, fabricated by powder metallurgy, in room temperature in previous articles. The objective of this paper is to clarify the effects of temperature on its wear properties. Wear tests in sliding conditions under various temperatures have been conducted using the pin-on-disc type wear test machine. The results indicate that the wear properties of 5%Co-5%V-1%Nb high speed steel in high temperature as well as in room temperature are excellent. It may be deduced that the oxide layer formed on worn surface at high temperature is stable enough to prevent wear due to the high temperature strength of its matrix.

• 전력전자학회:학술대회논문집
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• 전력전자학회 2006년도 전력전자학술대회 논문집
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• pp.288-291
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• 2006

The authors, R&D member of DAWONSYS and Soongsil University, are developing 5000kW smelting inverter system by 2007 under the sponsor from Korea Energy Management Corporation. As a part of the project, 2500kW inverter system has developed in 2005[6], and installed in real production site, and has been running for 7 months successfully. This report deals with the test result of 2500kW smelting inverter system and design for 5000kW smelting inverter system which is final target of this project.

• 대한한의학회지
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• 제20권1호
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• pp.30-43
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• 1999

This is a fundamental study for bibliometric analysis investigating the general, research, copyright activities and cited literature related to the field of Oriental Medicine, The data used for this study included theses published by the Journal of Korean Oriental Medicine Society over a period of nine years, from 1990 to 1998, We investigated the productivity of national authors, distribution of cited literature and subject analysis about Oriental Medicine and its authors quantitatively, So we were able to reach several conclusions: 1. The rule of Lotka is applied considerably to analyze the productivity of authors in the field of Oriental Medicine, When it comes to the analysis of national authors it was found that most authors in this field of study published 2 to 10 volumes, likewise other studies. And the rate of co-authorships was high, because most surveys are clinical. 2. When it comes to distribution of cited literatures, independent volumes were cited more than journals. This represents that the citing style of Oriental Medicine has a tendency to follow the methodology of historical research. 3. Scholars in the field of Oriental Medicine mainly tend to cite self-subjects among cited literatures. After analysing self-subjects in this field, the result is that the order of frequency used as cited literatures is as follows: Internal Medicine, Herbology and Oriental Prescription, Acupuncture & Moxibustion. Acupuncture point, and subjects with the circulatory system diseases were mainly cited as far as subordinary subjects of Internal Medicine.

• Journal of Magnetics
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• 제13권4호
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• pp.115-119
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• 2008

The authors predicted that $Co_2HfSi$, a $Co_2$-based full Heusler alloy, is being a half-metallic ferromagnet by first-principles calculations using the all electron full-potential linearized augmented plane wave method which adopts the generalized gradient approximation. The integer value of the calculated total magnetic moment of 2.00 ${\mu}_B$ per formula unit and a spin gap of 0.69 eV in spin down state confirmed the half-metallicity of bulk $Co_2HfSi$. For the $Co_2HfSi$(001) surface, we considered two possible surface terminations, namely, Co terminated and HfSi terminated surfaces. It was found that half-metallicity was retained at the HfSi-terminated surface but not at the Co-terminated surface. The magnetic moment of surface Co atoms in the Co-terminated surface was slightly lower than that of Co atoms in deep inner-layers, whereas the magnetic moments of Hf and Si atoms at the HfSi-terminated surface were almost same as those in deep inner-layers.

• 대한통합의학회지
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• 제12권2호
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• pp.197-210
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• 2024

Purpose : This study aimed to analyze research trends in the field of integrative medicine through a bibliometric analysis of articles published in Integrative Medicine Research (IMR) journal from 2017 to 2022. Methods : Articles published in IMR journal between 2017 and 2022 were searched using the Web of Science database on August 22, 2023. The analysis was performed using the Bibliometrix and Biblioshiny tools in R (version 4.3.1) and VOSviewer (version 1.6.19). Results : The key findings were as follows: average citations per article (9.41), total authors (1,142), single-authored articles (12), average articles per author (0.27), average co-authors per article (5.27), and rate of international co-authorships (15.69 %). The most-cited article was on the cryopreservation of cells or tissues and their clinical applications. The top keyword analysis by author keywords showed that "acupuncture" was the most frequently used keyword (33 times). Co-occurrence network analysis showed 85 high-frequency keywords that appeared five or more times, and the top five keywords by total link strength were "acupuncture," "herbal medicine," "prevalence," "alternative medicine," and "complementary." The study found that, contrary to the trend in complementary and alternative medicine research in Korea, the IMR journal actively conducts intervention studies to provide clinical evidence. Conclusion : In the IMR journal, "acupuncture" was the most frequent of author keywords. The analysis of keyword trend topics over time showed that the keyword "systematic review" continued to appear from 2020 to 2022, and the keyword "clinical practice guideline" appeared for the first time in 2021. In particular, the co-occurrence network analysis highlighted keywords related to intervention research, in contrast to domestic research trends. While this study analyzed only one journal, future studies expanding the category of integrative medicine and increasing the number of journals analyzed may provide further insights.