• 제목/요약/키워드: Research-based

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Intelligent Steering Control System Based on Voice Instructions

  • Seo, Ki-Yeol;Oh, Se-Woong;Suh, Sang-Hyun;Park, Gyei-Kark
    • International Journal of Control, Automation, and Systems
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    • 제5권5호
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    • pp.539-546
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    • 2007
  • The important field of research in ship operation is related to the high efficiency of transportation, the convenience of maneuvering ships and the safety of navigation. For these purposes, many intelligent technologies for ship automation have been required and studied. In this paper, we propose an intelligent voice instruction-based learning (VIBL) method and discuss the building of a ship's steering control system based on this method. The VIBL system concretely consists of two functions: a text conversion function where an instructor's inputted voice is recognized and converted to text, and a linguistic instruction based learning function where the text instruction is understood through a searching process of given meaning elements. As a study method, the fuzzy theory is adopted to build maneuvering models of steersmen and then the existing LIBL is improved and combined with the voice recognition technology to propose the VIBL. The ship steering control system combined with VIBL is tested in a ship maneuvering simulator and its validity is shown.

보건의료 빅데이터를 활용한 연구방법 및 한의학 레지스트리의 필요성 (Application of Health Care Big data and Necessity of Traditional Korean Medicine Data Registry)

  • 한경선;하인혁;이준환
    • 한방비만학회지
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    • 제17권1호
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    • pp.46-53
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    • 2017
  • Health care big data is thought to be a promising field of interest for disease prediction, providing the basis of medical treatment and comparing effectiveness of different treatments. Korean government has begun an effort on releasing public health big data to improve the quality and safety of medical care and to provide information to health care professionals. By studying population based big data, interesting outcomes are expected in many aspects. To initiate research using health care big data, it is crucial to understand the characteristics of the data. In this review, we analyzed cases from inside and outside the country using clinical data registry. Based on successful cases, we suggest research method for evidence-based Korean medicine. This will provide better understanding about health care big data and necessity of Korean medicine data registry network.

증강현실 기반 항행정보 서비스 시스템의 사용성 평가 체크리스트 개발 (Development of usability checklist for AR-based navigation information system)

  • 장준혁;김홍태;오승빈;김선영
    • 한국항해항만학회:학술대회논문집
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    • 한국항해항만학회 2014년도 추계학술대회
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    • pp.247-248
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    • 2014
  • 국제 해사기구(IMO)에서는 선박의 안전한 항해를 위한 인적 요소와 관련된 연구의 중요성을 인식하고 있다. 사용자의 요구에 기초한 항해장비의 사용성은 이내비게이션 분야에서 중요한 이슈가 되고 있다. 다양한 분야에서 많은 사용성의 평가방법이 연구되어져 오고 있지만, 항해장비 분야의 연구에는 미흡한 실정이다. 본 연구에서는 AR 기반의 항행정보 시스템의 사용성 평가 체크리스트를 제안하고자 한다.

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일개 상급종합병원 간호사의 근거기반실무(Evidence-Based Practice) 촉진요인에 대한 인식 (Nurses' Perceptions regarding Evidence-Based Practice Facilitators in a Tertiary Hospital)

  • 조명숙;송미라;차선경
    • 기본간호학회지
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    • 제18권3호
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    • pp.300-309
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    • 2011
  • Purpose: The purpose of this study was to investigate facilitators of evidence-based practice (EBP) in Clinical Nurses. Method: The instruments used in study were the EBP facilitator scale developed by Nagy et al. and a questionnaire on EBP-related characteristics. Data were collected from 230 nurses at a tertiary hospital and analyzed by descriptive statistics. Results: Compared to previous studies, this study showed that nurses had more experience related to research courses and clinical research. However, the proportion of nurses who reviewed relevant articles still remained low. The respondents had positive perceptions of organizational supports for EBP and belief in the value of EBP, whereas they had negative perceptions of skills in locating and evaluating research reports, knowledge of research terms and statistics, and time to devote to EBP. Conclusion: The findings of the study provide important basic data to develop and implement an EBP programs. In future, EBP programs should cover the nurses' skills to search and review research literature as well as their knowledge of research terms and statistics. Furthermore, nurses will require help to ensure that there is adequate time to devote to EBP.

Research on diagnosis method of centrifugal pump rotor faults based on IPSO-VMD and RVM

  • Liang Dong ;Zeyu Chen;Runan Hua;Siyuan Hu ;Chuanhan Fan ;xingxin Xiao
    • Nuclear Engineering and Technology
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    • 제55권3호
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    • pp.827-838
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    • 2023
  • Centrifugal pump is a key part of nuclear power plant systems, and its health status is critical to the safety and reliability of nuclear power plants. Therefore, fault diagnosis is required for centrifugal pump. Traditional fault diagnosis methods have difficulty extracting fault features from nonlinear and non-stationary signals, resulting in low diagnostic accuracy. In this paper, a new fault diagnosis method is proposed based on the improved particle swarm optimization (IPSO) algorithm-based variational modal decomposition (VMD) and relevance vector machine (RVM). Firstly, a simulation test bench for rotor faults is built, in which vibration displacement signals of the rotor are also collected by eddy current sensors. Then, the improved particle swarm algorithm is used to optimize the VMD to achieve adaptive decomposition of vibration displacement signals. Meanwhile, a screening criterion based on the minimum Kullback-Leibler (K-L) divergence value is established to extract the primary intrinsic modal function (IMF) component. Eventually, the factors are obtained from the primary IMF component to form a fault feature vector, and fault patterns are recognized using the RVM model. The results show that the extraction of the fault information and fault diagnosis classification have been improved, and the average accuracy could reach 97.87%.

가정 호흡재활 프로그램 관련 연구 논문 분석 (The Analysis of Research on the Home-Based Pulmonary Rehabilitation Program)

  • 오의금;김소희;김순희;박희옥;이춘화
    • 성인간호학회지
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    • 제14권3호
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    • pp.368-377
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    • 2002
  • Purpose: The purpose of this study was to analyze the trend of research on the use of home-based pulmonary rehabilitation. Method: Using Medline and CINAHL search engine, experiemental research, titled as 'home-based pulmonary rehabilitation' and 'chronic lung disease', statistics were collected. The total 29 experimental studies published between 1981 to 2000 were selected and analyzed according to the ATS guidelines. Result: 1) The study samples in research were mostly of men, whose lung function was moderate to severe. 2) The total period of the intervention program varied from 5 to 12 week. The program included excercise intervention and educational intervention. Psychosocial intervention was minimal. 3) The outcome of the home-based pulmonary rehabilitation had been measured mostly by physical aspects. Quality of life and cost were less frequently measured. 4) In terms of effectiveness of the home based pulmonary rehabilitation program, physiologic outcome, such as lung function and hematologic markers, there was more 'no effect' than 'positive effect', whereas there was more 'positive effect' in decreasing dyspnea, improving excercise capacity, and improving quality of life. Conclusion: Based on these findings, future research on home-based pulmonary rehabilitation should be emphasized and provide standardized protocol, including psychosocial intervention, and analyses on cost and quality of life.

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산업계 배출수에서 포름알데히드의 배출허용기준 설정방안 고찰 (A Study on the Determination of Formaldehyde Effluent Limitation in the Industrial Wastewater)

  • 정동환;신진수;신기식;김재훈;김용석;류덕희
    • 환경영향평가
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    • 제22권3호
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    • pp.203-217
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    • 2013
  • This study looked at how to establish effluent limitation standards for formaldehyde, a toxic chemical widely used in industries. To this end, we reviewed Water Quality Based Effluent Limitation (WQBEL), Technology Based Effluent Limitation (TBEL), and water quality criteria for protection of human health and aquatic organism. Based on the results, we estimated formaldehyde effluent limitation standards appropriate to control water quality of industrial wastewater in Korea. However, this study has limits due to the lack of some data necessary in estimating formaldehyde effluent limitation. For example, although water quality criteria based on non-carcinogenic properties of formaldehyde were calculated, those based on carcinogenic properties were not be able to estimate because of the absence of applicable cancer potency factor q1. Without applicable factor, we calculated water quality standards for formaldehyde based on water quality criteria of advanced countries including the United States, while with no water quality standard we referred to applicable drinking water quality standards of other countries. For eco-toxicity based on water quality criteria, proper figures could not be calculated since there have been few reliable data.

경유의 윤활 성능 향상을 위한 식물유 기반 알칸올 아마이드의 합성 (Synthesis of Vegetable-based Alkanol Amides for Improving Lubricating Properties of Diesel Fuel)

  • 육정숙;김영운;유승현;정근우;김남균;임대재
    • 공업화학
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    • 제23권4호
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    • pp.421-427
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    • 2012
  • 초저유황 경유의 윤활성능을 향상시킬 목적으로 식물유 기반 알칸올 아마이드 유도체를 합성하여 윤활성능을 평가하였다. 알칸올 아마이드 유도체는 폐식물유(다크오일), 팜유, 코코넛유를 메탄올과의 연속 전이에스테르화 반응을 통하여 합성한 지방산 메틸에스테르와 디에탄올아민(DEA)의 아마이드화 반응을 행하여 합성하였다. 합성한 알칸올 아마이드 유도체는 1 wt% 범위 내에서 초저유황 경유에 잘 용해되었으며, 이 유도체를 120 ppm 포함한 초저유황 경유의 윤활성능을 HFRR법으로 측정하였다. 그 결과, 초저유황 경유의 마모흔의 직경이 581 ${\mu}m$에서 아마이드 첨가 후 305~323 ${\mu}m$으로 현저히 작아져 초저유황 경유의 윤활성능을 향상하는 것으로 확인되었다. 한편, 식물유의 종류에 따른 마모흔의 차이는 크지 않아 알칸올 아마이드 유도체의 알킬기의 구조에 따른 윤활성능의 차이는 크게 나타나지 않았다. 알칸올 아마이드 한 종류를 선정하여 첨가 농도에 따른 윤활성능을 평가한 결과, 농도에 따라 마모흔의 직경이 현저히 작아지는 결과를 얻었는데 이는 윤활성능이 첨가 농도에 따라 향상되는 것을 의미한다.

연구기반 스핀오프 벤처기업의 성장과정 및 성공요인에 관한 탐색적 사례연구;(주)아이센스 (An Exploratory Case Study on the Growth Process and Success Factors in the Research Based Spin-off Ventures;i-SENS)

  • 이병헌;강원진;전호일
    • 한국벤처창업학회:학술대회논문집
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    • 한국벤처창업학회 2008년도 춘계학술대회
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    • pp.143-178
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    • 2008
  • 본 연구는 공공연구기관에서 개발한 기술을 기반으로 창업된 연구기반스핀오프벤처기업의 성장과정과 성장과정에서 나타난 어려움을 극복하고 성공할 수 있었던 요인들에 대해 살펴본 사례연구이다. 사례기업은 연구기반스핀오프벤처기업의 한 형태인 교수벤처기업 (주)아이센스이다. (주)아이센스는 광운대학교 화학과에 재직 중이던 차근식 교수와 남학현 교수가 연구실 대학원생들과 창업한 벤처기업으로 자가 혈당측정기틀 생산하는 신기술벤처기업이다. 두 교수는 광운대학교 내에 화학센서 연구센터를 운영하면서 바이오센서와 관련된 많은 기초연구 성과를 도출하였으며, 연구개발 전문회사를 설립하여 용역과제를 수행하면서 연구자금을 마련하고, 추후 하고 싶은 연구를 수행할 목적으로 (주)아이센스를 설립하였다. 그러나 창업자들의 초기의도와는 달리 (주)아이센스는 자가혈당측정기를 생산하여 판매하는 제조회사로 성장하였으며, 2008년 코스닥 상장 예정이다. 본 연구는 성공적인 연구기반스핀오프벤처기업인 (주)아이센스의 창업과 성장과정을 분석하고 성장과정에서의 어려움을 극복하고 성공할 수 있었던 요인을 규명하여, 연구기반스핀오프벤처기업이 성공할 수 있는 정책적 실무적 시사점을 제공하고자 한다.

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