• Title/Summary/Keyword: the criteria of similarity

Search Result 205, Processing Time 0.024 seconds

Fragility Analysis of A Scaled Model of Reinforced Concrete Column in Accordance with Similitude Law (상사법칙이 적용된 철근콘크리트 기둥 축소모형의 지진 취약도 분석)

  • Park, Dong Uk;Jeon, Bub Gyu;Kim, Nam Sik;Park, Jamin;Cho, Jae-Yeol
    • Journal of the Earthquake Engineering Society of Korea
    • /
    • v.21 no.2
    • /
    • pp.87-93
    • /
    • 2017
  • Many studies are conducted in several fields for fragility analysis of structures or elements which is a probabilistic seismic safety analysis in consideration with uncertainty of seismic loading. It is hard to directly conduct fragility analysis for an infrastructure with social importance due to its size. Therefore, a fragility analysis for an infrastructure mainly conducted in element level or conducted with scaled model built in accordance with similarity law. In this article, fragility analysis for prototype and scaled model of reinforced concrete column was conducted with numerical models which had been updated by the results of shaking table test and pseudo dynamic test. As a result, response stress from the numerical analysis result of prototype model was higher than that from scaled model due to different stiffness ratios between steel and concrete. However, the probability of failure for scaled model was higher than that for prototype model because failure criteria for scaled model was down due to similarity law. Also it was evaluated that probability of failure by using log normal standard deviation of response stresses by spectrum matched accelerograms was more reliable than probability of failure by using existing coefficient of variation normally used.

Improving Neighborhood-based CF Systems : Towards More Accurate and Diverse Recommendations (추천의 정확도 및 다양성 향상을 위한 이웃기반 협업 필터링 추천시스템의 개선방안)

  • Kwon, YoungOk
    • Journal of Intelligence and Information Systems
    • /
    • v.18 no.3
    • /
    • pp.119-135
    • /
    • 2012
  • Among various recommendation techniques, neighborhood-based Collaborative Filtering (CF) techniques have been one of the most widely used and best performing techniques in literature and industry. This paper proposes new approaches that can enhance the neighborhood-based CF techniques by identifying a few best neighbors (the most similar users to a target user) more accurately with more information about neighbors. The proposed approaches put more weights to the users who have more items co-rated by the target user in similarity computation, which can help to better understand the preferences of neighbors and eventually improve the recommendation quality. Experiments using movie rating data empirically demonstrate simultaneous improvements in both recommendation accuracy and diversity. In addition to the typical single rating setting, the proposed approaches can be applied to the multi-criteria rating setting where users can provide more information about their preferences, resulting in further improvements in recommendation quality. We finally introduce a single metric that measures the balance between accuracy and diversity and discuss potential avenues for future work.

A Qualitative Study on the Purchase Behavior for the Counterfeit of Fashion Luxury Brands (패션 명품(名品) 복제품(複製品)의 구매행동(購買行動)에 관(關)한 질적(質的) 연구(硏究))

  • Kim, Il
    • Journal of Fashion Business
    • /
    • v.8 no.5
    • /
    • pp.41-59
    • /
    • 2004
  • The purpose of this study is to analyze consumers' purchase behavior for the counterfeits of fashion luxury brands. The research method of the study used a naturalistic approach. The first participant observation was carried out in the internet sites in order to collect the data on the purchase behavior for counterfeits; and the second participant observation was applied in the Dongdaemun shopping mall, Namdaemun shopping mall and Itaewon shopping mall; finally 6 informants were selected and then an interview was held with them. The results of the study are as follows; 1. The reasons for the first purchase of counterfeits are variously shown according to life stages, and the repetitive purchase behavior is influenced by the degree of satisfaction for the first purchase. The information collection for counterfeits is widely made through various media, and especially the information collection is active and positive in the case of planned purchase but it is passive and negative in the case of unplanned purchase. 2. The most important criteria in purchasing counterfeits is the degree of similarity with luxury brands and other criteria include price, design, utility etc. The majority of purchase items is not clothing but miscellaneous goods which are more similar in terms of design and quality. The purchase of counterfeits is made by impulse purchase but the purchase of luxury brands is made by planned purchase. 3. The rationalization mechanism for the purchase of counterfeits is observed in all informants, which is a sort of defence mechanism for avoiding a guilty conscience to buy illegal goods.

Evaluation of Criteria for Mapping Characters Using an Automated Hangul Font Generation System based on Deep Learning (딥러닝 학습을 이용한 한글 글꼴 자동 제작 시스템에서 글자 쌍의 매핑 기준 평가)

  • Jeon, Ja-Yeon;Ji, Young-Seo;Park, Dong-Yeon;Lim, Soon-Bum
    • Journal of Korea Multimedia Society
    • /
    • v.23 no.7
    • /
    • pp.850-861
    • /
    • 2020
  • Hangul is a language that is composed of initial, medial, and final syllables. It has 11,172 characters. For this reason, the current method of designing all the characters by hand is very expensive and time-consuming. In order to solve the problem, this paper proposes an automatic Hangul font generation system and evaluates the standards for mapping Hangul characters to produce an effective automated Hangul font generation system. The system was implemented using character generation engine based on deep learning CycleGAN. In order to evaluate the criteria when mapping characters in pairs, each criterion was designed based on Hangul structure and character shape, and the quality of the generated characters was evaluated. As a result of the evaluation, the standards designed based on the Hangul structure did not affect the quality of the automated Hangul font generation system. On the other hand, when tried with similar characters, the standards made based on the shape of Hangul characters produced better quality characters than when tried with less similar characters. As a result, it is better to generate automated Hangul font by designing a learning method based on mapping characters in pairs that have similar character shapes.

A study on the regulation of the similar transmission service of digital music (디지털 음원 유사전송 서비스의 규제 방안 연구)

  • Yu, Seung-Jun;Lee, Hwan-soo
    • Asia-pacific Journal of Multimedia Services Convergent with Art, Humanities, and Sociology
    • /
    • v.8 no.4
    • /
    • pp.151-160
    • /
    • 2018
  • The development of digital technology and the Internet has brought about a great change in the content industry. In order to keep pace with these changes, the copyright law has undergone several revisions, and the concept of "digital sound transmission" was introduced in the 2006 revision. However, in the current law, digital audio transmission is problematic in that the criteria for distinguishing between broadcasting and transmission is abstract and unclear. This ambiguity makes it difficult to judge the legal status of new music webcasting service such as "Free Litsen". Although these services are positioned as digital audion transmission, they have created a new concept of pseudo transmission because of its similarity to the audio transmission in its convenience and utility. These problems stem from the imbalance of between the development of technology and the legal system, so the change of the legal system is inevitable. Thus, this study discusses US copyright law and related cases, and then suggests solutions for pseudo transmission problems. This study suggests legislative criteria for pseudo transmission problems and legislative measures that can reduce the actual damage to the music market.

Calibrating Thresholds to Improve the Detection Accuracy of Putative Transcription Factor Binding Sites

  • Kim, Young-Jin;Ryu, Gil-Mi;Park, Chan;Kim, Kyu-Won;Oh, Berm-Seok;Kim, Young-Youl;Gu, Man-Bok
    • Genomics & Informatics
    • /
    • v.5 no.4
    • /
    • pp.143-151
    • /
    • 2007
  • To understand the mechanism of transcriptional regulation, it is essential to detect promoters and regulatory elements. Various kinds of methods have been introduced to improve the prediction accuracy of regulatory elements. Since there are few experimentally validated regulatory elements, previous studies have used criteria based solely on the level of scores over background sequences. However, selecting the detection criteria for different prediction methods is not feasible. Here, we studied the calibration of thresholds to improve regulatory element prediction. We predicted a regulatory element using MATCH, which is a powerful tool for transcription factor binding site (TFBS) detection. To increase the prediction accuracy, we used a regulatory potential (RP) score measuring the similarity of patterns in alignments to those in known regulatory regions. Next, we calibrated the thresholds to find relevant scores, increasing the true positives while decreasing possible false positives. By applying various thresholds, we compared predicted regulatory elements with validated regulatory elements from the Open Regulatory Annotation (ORegAnno) database. The predicted regulators by the selected threshold were validated through enrichment analysis of muscle-specific gene sets from the Tissue-Specific Transcripts and Genes (T-STAG) database. We found 14 known muscle-specific regulators with a less than a 5% false discovery rate (FDR) in a single TFBS analysis, as well as known transcription factor combinations in our combinatorial TFBS analysis.

Development of Borough Road Pavement Condition Evaluation Criteria and Prediction Index (자치구 포장상태평가등급 기준 개선 및 포장상태 예측지수 개발)

  • Lee, Sang Yum;Jeon, Jin Ho
    • International Journal of Highway Engineering
    • /
    • v.18 no.6
    • /
    • pp.115-122
    • /
    • 2016
  • OBJECTIVES : This study develops an evaluation method, which is useful to inspect pavement condition of specific boroughs. This is because pavement condition is broadly divided into five grades via visual inspection, which does not consider the types of deteriorations, and is decided by an investigator having a subjective viewpoint. This visual inspection method is not a satisfactory method for accurate maintenance when various deteriorations occur. METHODS : The performance model considers several factors such as crack, rutting, and IRI. This method is also modified from borough SPI based on SPI (Seoul Pavement Index). Considering limited budget of borough, PI (prediction index) is suggested, which is related to the grade of pavement condition evaluation and type of materials. Practical correlation review is also conducted with statistical verification by using the Monte Carlo simulation. RESULTS : The results of the study show that modified criteria are reasonable. First, the comparison between the visual inspection result and the SPI result indicates that the R-square value is sufficiently high. Second, through the common section, each evaluation method could be compared, and the result shows considerable similarity, which increases when the range is modified. Finally, PI for predicting remaining life and the random number SPI have common parts, which means that each indicator would be adequate to be used as an evaluation method. CONCLUSIONS : Comparison and analysis results show that the developed evaluation method is reasonable for specific boroughs where financial support is inadequate for the evaluation process by using the newer equipment. Moreover, for more accurate evaluation method, previous visual inspection data should be utilized, and the database of inspection equipment have to be collected.

ANALYSIS OF ASTRONOMICAL ALMANAC DATA FOR NATIONAL STANDARD REFERENCE DATA (참조표준 등록을 위한 천문역법 자료 분석)

  • Yang, Hong-Jin;Ahn, Young-Sook;Lee, Ki-Won
    • Publications of The Korean Astronomical Society
    • /
    • v.23 no.2
    • /
    • pp.53-63
    • /
    • 2008
  • Korea Astronomy and Space Science Institute (KASI), direct decendant of Korea National Astronomy Observatory, has been publishing Korean Astronomical Almanac since in 1976. The almanac contains essential data in our daily lives such as the times of sunrise, sunset, moonrise, and moonset, conversion tables between luni-solar and solar calendars, and so forth. So, we are planning to register Korean astronomical almanac data for national Standard Reference Data(SRD), which is a scientific/technical data whose the reliablity and the accuracy are authorized by scientific analysis and evalution. To be certificated as national SRD, reference data has to satisfy several criteria such as traceability, consistency, uncertainty, and so on. Based on similarity among calculation processes, we classified astronomical almanac data into three groups: Class I, II, and III. We are planning to register them for national SRD in consecutive order. In this study, we analyzed Class I data which is aimed to register in 2009, and presented the results. Firstly, we found that the traceability and the consistency can be ensured by the usage of NASA/JPL DE405 ephemeris and by the comparsion with international data, respectively. To evaluate uncertainty in Class I data, we solved the mathematical model and determined the factors influencing the calculations. As a result, we found that the atmospheric refraction is the main factor and leads to a variation of ${\pm}16$ seconds in the times of sunrise and sunset. We also briefly review the histories of astronomical almanac data and of standard reference data in Korea.

A Study in the Improvement and Analysis Problem of Privacy Impact Assessment Qualification Criteria: focus on Similarity Analysis between Similar Certificates and Certification System of Privacy Impact Assessment (개인정보영향평가 자격기준의 문제분석과 개선방안 연구 - 유사자격과 개인정보영향평가 자격체계와의 유사성 분석을 중심으로)

  • Kim, Erang;Shim, Mina;Lim, Jong In
    • Journal of the Korea Institute of Information Security & Cryptology
    • /
    • v.23 no.1
    • /
    • pp.127-142
    • /
    • 2013
  • Since Personal Information Protection Act came into effect on September 2011, PIA(Privacy Impact Assessment) of public institutions has become obliged. Therefore, an increasing demand for PIA professionals is being expected. In domestic, however, no specialized certificates exist and therefore similar certificates have become a requirement for PIA professionals. Henceforth, however, the system based on these similar certificates is to be an obstacle to advancing PIA. Therefore, this study analyzes the sufficiency of current similar certificates compared with the PIA qualification requirements. And then, analyzes the validity of allowance as similar certificates by using this outcome of the validity. As this comparison draws a clear gap between PIA qualification and similar certificates, this paper suggest three suggestions to improve current qualification. Three suggestions are expected to contribute a qualitative improvement of the PIA industry.

Correlation Analysis in Information Security Checklist Based on Knowledge Network (지식 네트워크에 근거한 정보보호 점검기준 관계분석)

  • Jin, Chang Young;Kim, Ae Chan;Lim, Jong In
    • The Journal of Society for e-Business Studies
    • /
    • v.19 no.2
    • /
    • pp.109-124
    • /
    • 2014
  • As the emerged importance and awareness for information security, It is being implemented by each industrial sector to protect information assets. In this paper, we analyze the information security checklists or security ratings criteria to derive similarity and difference in context which used to knowledge network analysis method. The analyzed results of all checklists (ISMS, PIMS, 'FSS', 'FISS', 'G') are as follows : First, It is common factors that the protection of information systems and information assets, incident response, operations management. Second, It deals with relatively important factors that IT management, the adequacy of audit activities in the financial IT sector including common factors. Third, the criteria of ISMS contains the majority of the contents among PIMS, 'FSS', 'FISS'and 'G'.