• Title/Summary/Keyword: reliability index

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An Scholastic Analysis on the SCI Publication Results and Research Capability of Major Academic and Research Institute in Oceanography (국내외 해양관련 연구기관 및 대학의 SCI 학술연구능력 분석 연구)

  • Han Jong-Yup
    • Journal of Korean Library and Information Science Society
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    • v.36 no.4
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    • pp.309-328
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    • 2005
  • Comparative analyses were carried out on SCI publication results produced by scientists during their employment at the five domestic ocean-related college and six major oceanographic institutes in other countries. Assessment of research performance included bibliometric indicators : type of research categories, and, evaluation of the reliability of citation data to establish future research goals. Analysis parameters also included number of SCI publication results, cited frequency, higher ranked author group, higher ranked Journal group, higher ranked SCI category for each academic and research Institutes in oceanography. Such analyses can help improve and achieve institutional goals in the future as well as help managing and prioritizing majors scientific journals and information services.

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Determination of Optical Constants of TiNx was Sputtered with RF Magnetron Sputtering Method (RF 마그네트론 스퍼터링 방법으로 증착한 TiNx 박막의 광학상수 결정)

  • Park, Myung Hee;Kim, Sang Yong;Lee, Soonil;Koh, Ken Ha
    • Journal of Korean Ophthalmic Optics Society
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    • v.12 no.3
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    • pp.77-81
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    • 2007
  • We sputtered $TiN_x$ (titanium nitride) thin films on silicon substrates using ultra high vacuum RF magnetron sputtering method, and measured spectra of ellipsometry angles ${\Delta}$ and ${\Psi}$ in the photon-energy range of 1.5-5.0 eV using a variable angle spectroscopic ellipsometer. The optical constants, refractive index and extinction coefficient of the $TiN_x$ films were determined via the dispersion parameters extracted from the curve-fitting process based on Drude+Lorentz oscillator dispersion function. The reliability of determined optical constants were verified through the comparison of between simulated reflectance and reflectance spectra measured using a spectrophotometer.

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Assessing the Impact of Advanced Technologies on Utilization Improvement of Substations

  • Han, Dong;Yan, Zheng;Zhang, Dao-Tian;Song, Yi-Qun
    • Journal of Electrical Engineering and Technology
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    • v.10 no.5
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    • pp.1921-1929
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    • 2015
  • The smart substation is the heart of a transmission system, which is particularly emphasized as the most significant composition of smart grids in China. In order to assess the functionality performance of substation technologies, this paper presents methods used to identify the most promising solutions for smart substation design and to evaluate the technical levels of available technologies. The multi-index optimization model is presented to address the issue of smart substation planning. A mathematical model of the planning decision problem is established with multiple objectives consisting of economic, reliability, and green key indices, and many kinds of concerns including physical and environmentally friendly operations are formulated as a set of constraints. With respect to the assessment of the technical level regarding integration of advanced technologies into a substation, a modified grey whitenization weight function is adopted to structure a novel grey clustering method. The proposed grey clustering approach is used to overcome the difficulty of insufficient quantitative assessment capacity for traditional methods. The evaluation of technical effects provides the classification definition for the development phase and the maturity level of the smart substation. The effectiveness of the proposed approaches in planning decision-making and evaluation of construction efforts is demonstrated with case studies involving the actual smart substation projects of Wenchongkou substation in China Southern Power Grid (CSG) and Mengzi substation in State Grid Corporation of China (SGCC).

Development of Evaluation Indicators for Level of Service on Academic Library Users with Disabilities (대학도서관의 장애인 서비스 수준 측정을 위한 평가지표 개발)

  • Park, Jong-Bae
    • Journal of Korean Library and Information Science Society
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    • v.44 no.4
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    • pp.71-92
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    • 2013
  • The purpose of this study was to identify the service factors of university libraries which aim to improve the educational welfare of the disabled, and to develop an evaluation indicator to evaluate these vital service factors. To proceed with this study, guidelines of public library services for people with disabilities, and previous research and job description of academy library analysed and developed indicators suited for evaluating academic library services for people with disabilities. A pilot survey and main survey about the evaluation factors and indicators conducted with librarians who work for university libraries, and the questions were refined by exploratory factor analysis of the data collected from the survey. As a result, through the process of identifying reliability and validity, it turned out that the evaluation factor and subordinate index of university library services for the disabled consisted of 8 factors and 33 indicators.

Developing a Short Form of the Korean version of the Experiences in Close Relationships Questionnaire-Revised (한국어 개정판 친밀관계경험 척도의 단축형 개발)

  • Yun, Hyerim;Lee, Won-Kee;Bae, Geumye;Lee, Sang-Won;Woo, Jungmin;Won, Seunghee
    • Anxiety and mood
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    • v.13 no.2
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    • pp.115-122
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    • 2017
  • Objective : The experiences in close relationships questionnaire-revised (ECR-R) (Fraley, Waller & Brennan, 2000) is a valuable tool for measuring adult attachment, and its Korean version, the ECRR-K (Kim, 2004), is widely used in Korea. However, given its substantial length, this study was aimed to develop and validate a short version of the ECRR-K called the ECRR-K14. Methods : Two hundred and ninety-four medical students participated in this study in 2016. They completed the ECRR-K, the Perceived Stress Scale (PSS), the Rosenberg Self-Esteem Scale (RSES), and the UCLA Loneliness Scale (UCLA-LS). The study authors applied the Rasch rating scale to check each item's model fit and then performed confirmatory factor analyses (CFAs) to test the new scale's validity. Results : The authors selected seven items each for the anxiety and avoidance subscales, and the ECRR-K14 showed fair to good internal consistency (Cronbach's ${\alpha}=0.93$ and 0.92 for anxiety and avoidance, respectively). The anxiety subscale showed concurrent validity with the PSS and the RSES while the avoidance subscale showed concurrent validity with the UCLA-LS. The CFAs also demonstrated the validity of the model with a goodness-of-fit index of 0.916. Conclusion : The ECRR-K14 showed excellent reliability and validity and appears to be a promising instrument for measuring the two attachment dimensions in adults.

A Correlation Analysis between the Social Signals of Cold Symptoms Extracted from Twitter and the Influence Factors (트위터에서 추출한 감기 증상의 사회적 신호와 영향요인과의 상관분석)

  • Yoon, Jinyoung;Kim, Seokjung;Lee, Bumsuk;Hwang, Byung-Yeon
    • Journal of Korea Multimedia Society
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    • v.16 no.6
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    • pp.667-677
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    • 2013
  • With the huge success of Social Network Services, studies on social network analysis to extract the current issues or to track the symptoms of epidemic disease are being carried out actively. On Twitter, tweets reflect people's reaction to an event and users' individual status well, so it is possible to detect an event regarding a tweet as a sensory value. Recently, social signals are used to detect the spread of illness like the flu as well as the occurrence of disaster event like an earthquake in early stages. In this paper, we set up a cold as a target event and regarded tweets as Cold Signals. To evaluate the reliability of Cold Signals, we analyzed correlations between weather factors and the cold index provided by Korea Meteorological Administration.

Flexural tests on two-span unbonded post-tensioned lightweight concrete beams

  • Yang, Keun-Hyeok;Lee, Kyung-Ho;Yoon, Hyun-Sub
    • Structural Engineering and Mechanics
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    • v.72 no.5
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    • pp.631-642
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    • 2019
  • The objective of the present study is to examine the flexural behavior of two-span post-tensioned lightweight aggregate concrete (LWAC) beams using unbonded tendons and the reliability of the design provisions of ACI 318-14 for such beams. The parameters investigated were the effective prestress and loading type, including the symmetrical top one-point, two third-point, and analogous uniform loading systems. The unbonded prestressing three-wire strands were arranged with a harped profile of variable eccentricity. The total length of the beam, measured between both strand anchorages, was 11000 mm. The test results were compared with those compiled from simply supported LWAC one-way members, wherever possible. The ultimate load capacity of the present beam specimens was evaluated by the collapse mechanism of the plasticity theorem and the nominal section moment strength calculated following the provision of the ACI 318-14. The test results showed that the two-span post-tensioned LWAC beams had lower stress increase (Δfps) in the unbonded tendons than the simply supported LWAC beams with a similar reinforcement index. The effect of the loading type on Δfps and displacement ductility was less significant for two-span beams than for the comparable simply supported beams. The design equations for Δfps and Δfps proposed by ACI 318-14 and Harajli are conservative for the present two-span post-tensioned LWAC beams, although the safety decreases for the two-span beam, compared to the ratios between experiments and predictions obtained from simply supported beams.

A Study on Corporate Training Program applying Culture and Arts in Korea (문화, 예술을 활용한 한국 기업의 교육 프로그램에 관한 연구)

  • Choi, Gwang Ung;Yum, Kyoung Sik;Youn, Ho Chang
    • Proceedings of the Korea Contents Association Conference
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    • 2007.11a
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    • pp.724-726
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    • 2007
  • Many enterprises make use of 'mecenat action' for positive image ensuring to company and harmony within organization members. Also, at the same time the research has continued estimating of efficiency about that area. but that estimations get accomplished inclusive and abstractive, and then estimation of significant effect isn't sufficient. In this study we consider that many enterprises practice culture and art education program, and related that analyze the estimation of effect in 'mecenat action'. Stand on this analysis we attempts to extract factor, having representation character with making standard for estimation of education effect. That is a implication that relation education programs are prepared many enterprises, In future study, we will need to make standard and select methods about effect estimation, add measurable index that reliability can increase.

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Surface Plasmon Resonance Ellipsometry Using an Air Injection System with an Extraction of Air System (공기주입 장치와 공기제거 장치를 사용한 표면 플라즈몬 공명 타원계측기)

  • Lee, Hong-Won;Cho, Eun-Kyoung;Jo, Jae-Heung;Won, Jong-Myoung;Shin, Gi-Ryang;CheGal, Won;Cho, Yong-Jai;Cho, Hyun-Mo
    • Korean Journal of Optics and Photonics
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    • v.20 no.3
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    • pp.182-188
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    • 2009
  • The surface plasmon resonance ellipsometer (SPRE), using a multiple air injection system with an extraction of air system, has been proposed and developed to minimize measurement error of signals due to diffusion of reagent into running buffer. Since the diffusion of reagent into running buffer affects the refractive index of the running buffer by changing the concentration, characteristics of binding between various bio-molecules don't appear clearly in measurement results. The diffusion between running buffer and reagent can be blocked by using an air bubble injection system. An extraction of air system is used to remove the noise signal due to unnecessary air bubbles flowing in a channel. Reliability of measurement results has been improved by using the valve system.

The Blog Polarity Classification Technique using Opinion Mining (오피니언 마이닝을 활용한 블로그의 극성 분류 기법)

  • Lee, Jong-Hyuk;Lee, Won-Sang;Park, Jea-Won;Choi, Jae-Hyun
    • Journal of Digital Contents Society
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    • v.15 no.4
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    • pp.559-568
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    • 2014
  • Previous polarity classification using sentiment analysis utilizes a sentence rule by product reviews based rating points. It is difficult to be applied to blogs which have not rating of product reviews and is possible to fabricate product reviews by comment part-timers and managers who use web site so it is not easy to understand a product and store reviews which are reliability. Considering to these problems, if we analyze blogs which have personal and frank opinions and classify polarity, it is possible to understand rightly opinions for the product, store. This paper suggests that we extract high frequency vocabularies in blogs by several domains and choose topic words. Then we apply a technique of sentiment analysis and classify polarity about contents of blogs. To evaluate performances of sentiment analysis, we utilize the measurement index that use Precision, Recall, F-Score in an information retrieval field. In a result of evaluation, using suggested sentiment analysis is the better performances to classify polarity than previous techniques of using the sentence rule based product reviews.