• Title/Summary/Keyword: Korean WordNet

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The Influence of Negative Emotions on Customer Contribution to Organizational Innovation in an Online Brand Community (온라인 브랜드 커뮤니티 내 부정적 감정들이 기업 혁신을 위한 고객 기여에 미치는 영향)

  • Jung, Suyeon;Lee, Hanjun;Suh, Yongmoo
    • Journal of Internet Computing and Services
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    • v.14 no.4
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    • pp.91-100
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    • 2013
  • In recent years, online brand communities, whereby firms and customers interact freely, are emerging trend, because customers' opinions collected in these communities can help firms to achieve their innovation effectively. In this study, we examined whether customer opinions containing negative emotions have influence on their adoption for organizational innovation. To that end, we firstly classified negative emotions into five categories of detailed negative emotions such as Fear, Anger, Shame, Sadness, and Frustration. Then, we developed a lexicon for each category of negative emotions, using WordNet and SentiWordNet. From 81,543 customer opinions collected from MyStarbucksIdea.com which is Starbucks' brand community, we extracted terms that belong to each lexicon. We conducted an experiment to examine whether the existence, frequency and strength of terms with negative emotions in each category affect the adoption of customer opinions for organizational innovation. In the experiment, we statistically verified that there is a positive relationship between customer ideas containing negative emotions and their adoption for innovation. Especially, Frustration and Sadness out of the five emotions are significantly influential to organizational innovation.

A Question Example Generation System for Multiple Choice Tests by utilizing Concept Similarity in Korean WordNet (한국어 워드넷에서의 개념 유사도를 활용한 선택형 문항 생성 시스템)

  • Kim, Young-Bum;Kim, Yu-Seop
    • The KIPS Transactions:PartA
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    • v.15A no.2
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    • pp.125-134
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    • 2008
  • We implemented a system being able to suggest example sentences for multiple choice tests, considering the level of students. To build the system, we designed an automatic method for sentence generation, which made it possible to control the difficulty degree of questions. For the proper evaluation in the multiple choice tests, proper size of question pools is required. To satisfy this requirement, a system which can generate various and numerous questions and their example sentences in a fast way should be used. In this paper, we designed an automatic generation method using a linguistic resource called WordNet. For the automatic generation, firstly, we extracted keywords from the existing sentences with the morphological analysis and candidate terms with similar meaning to the keywords in Korean WordNet space are suggested. When suggesting candidate terms, we transformed the existing Korean WordNet scheme into a new scheme to construct the concept similarity matrix. The similarity degree between concepts can be ranged from 0, representing synonyms relationships, to 9, representing non-connected relationships. By using the degree, we can control the difficulty degree of newly generated questions. We used two methods for evaluating semantic similarity between two concepts. The first one is considering only the distance between two concepts and the second one additionally considers positions of two concepts in the Korean Wordnet space. With these methods, we can build a system which can help the instructors generate new questions and their example sentences with various contents and difficulty degree from existing sentences more easily.

Construction of Korean Knowledge Base Based on Machine Learning from Wikipedia (위키백과로부터 기계학습 기반 한국어 지식베이스 구축)

  • Jeong, Seok-won;Choi, Maengsik;Kim, Harksoo
    • Journal of KIISE
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    • v.42 no.8
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    • pp.1065-1070
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    • 2015
  • The performance of many natural language processing applications depends on the knowledge base as a major resource. WordNet, YAGO, Cyc, and BabelNet have been extensively used as knowledge bases in English. In this paper, we propose a method to construct a YAGO-style knowledge base automatically for Korean (hereafter, K-YAGO) from Wikipedia and YAGO. The proposed system constructs an initial K-YAGO simply by matching YAGO to info-boxes in Wikipedia. Then, the initial K-YAGO is expanded through the use of a machine learning technique. Experiments with the initial K-YAGO shows that the proposed system has a precision of 0.9642. In the experiments with the expanded part of K-YAGO, an accuracy of 0.9468 was achieved with an average macro F1-measure of 0.7596.

Construction and Evaluation of a Sentiment Dictionary Using a Web Corpus Collected from Game Domain (게임 도메인 웹 코퍼스를 이용한 감성사전 구축 및 평가)

  • Jeong, Woo-Young;Bae, Byung-Chull;Cho, Sung Hyun;Kang, Shin-Jin
    • Journal of Korea Game Society
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    • v.18 no.5
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    • pp.113-122
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    • 2018
  • This paper describes an approach to building and evaluating a sentiment dictionary using a Web corpus in the game domain. To build a sentiment dictionary, we collected vocabulary based on game-related web documents from a domestic portal site, using the Twitter Korean Processor. From the collected vocabulary, we selected the words whose POS are tagged as either verbs or adjectives, and assigned sentiment score for each selected word. To evaluate the constructed sentiment dictionary, we calculated F1 score with precision and recall, using Korean-SWN that is based on English Senti-word Net(SWN). The evaluation results show that average F1 scores are 0.85 for adjectives and 0.77 for verbs, respectively.

Word Network Analysis based on Mutual Information for Ontology of Korean Rural Planning (한국농촌계획 온톨로지 구축을 위한 상호정보 기반 단어연결망 분석)

  • Lee, Jemyung
    • Journal of Korean Society of Rural Planning
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    • v.23 no.3
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    • pp.37-51
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    • 2017
  • There has been a growing concern on ontology especially in recent knowledge-based industry and defining a field-customized semantic word network is essential for building it. In this paper, a word network for ontology is established with 785 publications of Korean Society of Rural Planning(KSRP), from 1995 to 2017. Semantic relationships between words in the publications were quantitatively measured with the 'normalized pointwise mutual information' based on the information theory. Appearance and co-appearance frequencies of nouns and adjectives in phrases are analyzed based on the assumption that a 'noun phrase' represents a single 'concept'. The word network of KSRP was compared with that of $WordNet^{TM}$, a world-wide thesaurus network, for the verification. It is proved that the KSRP's word network, established in this paper, provides words' semantic relationships based on the common concepts of Korean rural planning research field. With the results, it is expecting that the established word network can present more opportunity for preparation of the fourth industrial revolution to the field of the Korean rural planning.

KNU Korean Sentiment Lexicon: Bi-LSTM-based Method for Building a Korean Sentiment Lexicon (Bi-LSTM 기반의 한국어 감성사전 구축 방안)

  • Park, Sang-Min;Na, Chul-Won;Choi, Min-Seong;Lee, Da-Hee;On, Byung-Won
    • Journal of Intelligence and Information Systems
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    • v.24 no.4
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    • pp.219-240
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    • 2018
  • Sentiment analysis, which is one of the text mining techniques, is a method for extracting subjective content embedded in text documents. Recently, the sentiment analysis methods have been widely used in many fields. As good examples, data-driven surveys are based on analyzing the subjectivity of text data posted by users and market researches are conducted by analyzing users' review posts to quantify users' reputation on a target product. The basic method of sentiment analysis is to use sentiment dictionary (or lexicon), a list of sentiment vocabularies with positive, neutral, or negative semantics. In general, the meaning of many sentiment words is likely to be different across domains. For example, a sentiment word, 'sad' indicates negative meaning in many fields but a movie. In order to perform accurate sentiment analysis, we need to build the sentiment dictionary for a given domain. However, such a method of building the sentiment lexicon is time-consuming and various sentiment vocabularies are not included without the use of general-purpose sentiment lexicon. In order to address this problem, several studies have been carried out to construct the sentiment lexicon suitable for a specific domain based on 'OPEN HANGUL' and 'SentiWordNet', which are general-purpose sentiment lexicons. However, OPEN HANGUL is no longer being serviced and SentiWordNet does not work well because of language difference in the process of converting Korean word into English word. There are restrictions on the use of such general-purpose sentiment lexicons as seed data for building the sentiment lexicon for a specific domain. In this article, we construct 'KNU Korean Sentiment Lexicon (KNU-KSL)', a new general-purpose Korean sentiment dictionary that is more advanced than existing general-purpose lexicons. The proposed dictionary, which is a list of domain-independent sentiment words such as 'thank you', 'worthy', and 'impressed', is built to quickly construct the sentiment dictionary for a target domain. Especially, it constructs sentiment vocabularies by analyzing the glosses contained in Standard Korean Language Dictionary (SKLD) by the following procedures: First, we propose a sentiment classification model based on Bidirectional Long Short-Term Memory (Bi-LSTM). Second, the proposed deep learning model automatically classifies each of glosses to either positive or negative meaning. Third, positive words and phrases are extracted from the glosses classified as positive meaning, while negative words and phrases are extracted from the glosses classified as negative meaning. Our experimental results show that the average accuracy of the proposed sentiment classification model is up to 89.45%. In addition, the sentiment dictionary is more extended using various external sources including SentiWordNet, SenticNet, Emotional Verbs, and Sentiment Lexicon 0603. Furthermore, we add sentiment information about frequently used coined words and emoticons that are used mainly on the Web. The KNU-KSL contains a total of 14,843 sentiment vocabularies, each of which is one of 1-grams, 2-grams, phrases, and sentence patterns. Unlike existing sentiment dictionaries, it is composed of words that are not affected by particular domains. The recent trend on sentiment analysis is to use deep learning technique without sentiment dictionaries. The importance of developing sentiment dictionaries is declined gradually. However, one of recent studies shows that the words in the sentiment dictionary can be used as features of deep learning models, resulting in the sentiment analysis performed with higher accuracy (Teng, Z., 2016). This result indicates that the sentiment dictionary is used not only for sentiment analysis but also as features of deep learning models for improving accuracy. The proposed dictionary can be used as a basic data for constructing the sentiment lexicon of a particular domain and as features of deep learning models. It is also useful to automatically and quickly build large training sets for deep learning models.

Refinement of KorLex based on WordNet (워드넷 기반 한국어 명사 어휘의미망의 정제)

  • Hwang, Soon-Hee;Yoon, Ae-Sun
    • Proceedings of the Korean Society for Cognitive Science Conference
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    • 2005.05a
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    • pp.267-272
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    • 2005
  • 최근 들어 온톨로지(ontology), 시소러스(thesaurus) 등과 함께 주목받고 있는 Princeton 대학의 워드넷(WordNet, 이하 PWN) 은 자연어 처리(NLP)와 관련하여 대안을 제시할 수 있는 어휘의미망(lexico-semantic network)이다. 또한 PWN을 기반으로 상이한 개별어 어휘의미망 구축이 여러 차례 시도되었고, 현재도 진행 중이다. 본 연구는 간접 구축 방식에 의한 어휘의미망 구축 시 요구되는 정제(refinement) 방식들을 검토하고, 이를 한국어 명사 어휘의미망(KL)에 적용하여 정확도 검증 방법의 한 대안으로 제시하였다. 또한 보다 정교한 정제 방법의 모색과 고찰은 향후 과제로 삼고자 한다.

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The Structure of Polysemy: A study of multi-sense words based on WordNet

  • Lin, Jen-Yi;Yang, Chang-Hua;Tseng, Shu-Chuan;Huang, Chu-Ren
    • Proceedings of the Korean Society for Language and Information Conference
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    • 2002.02a
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    • pp.320-329
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    • 2002
  • The issues in polysemy with respect to the verbs in WordNet will be discussed in this paper. The hypernymy/hyponymy structure of the multiple senses is observed when we try to build a bilingual network for Chinese and English. There are several types of polysemic patterns and a co-hypernym may have the same word form as its subordinates. Fellbaum (2000) dubbed autotroponymy that the verbs linked by mailer relation share the same verb form. However, her syntactic criteria seem not compatible to the hierarchies in WN. Either the criteria or the network should be reconducted. For most verbs in WN 1.7, polysemous relations are unlikely to extend over 3 levels of IS-A relation. Highly polysemous verbs are more complicated and may be involved in certain semantic structures. Semi-automatic sense grouping may be helpful for multimlinguital information retrieveal.

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A Study on Speech Recognition Using the HM-Net Topology Design Algorithm Based on Decision Tree State-clustering (결정트리 상태 클러스터링에 의한 HM-Net 구조결정 알고리즘을 이용한 음성인식에 관한 연구)

  • 정현열;정호열;오세진;황철준;김범국
    • The Journal of the Acoustical Society of Korea
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    • v.21 no.2
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    • pp.199-210
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    • 2002
  • In this paper, we carried out the study on speech recognition using the KM-Net topology design algorithm based on decision tree state-clustering to improve the performance of acoustic models in speech recognition. The Korean has many allophonic and grammatical rules compared to other languages, so we investigate the allophonic variations, which defined the Korean phonetics, and construct the phoneme question set for phonetic decision tree. The basic idea of the HM-Net topology design algorithm is that it has the basic structure of SSS (Successive State Splitting) algorithm and split again the states of the context-dependent acoustic models pre-constructed. That is, it have generated. the phonetic decision tree using the phoneme question sets each the state of models, and have iteratively trained the state sequence of the context-dependent acoustic models using the PDT-SSS (Phonetic Decision Tree-based SSS) algorithm. To verify the effectiveness of the above algorithm we carried out the speech recognition experiments for 452 words of center for Korean language Engineering (KLE452) and 200 sentences of air flight reservation task (YNU200). Experimental results show that the recognition accuracy has progressively improved according to the number of states variations after perform the splitting of states in the phoneme, word and continuous speech recognition experiments respectively. Through the experiments, we have got the average 71.5%, 99.2% of the phoneme, word recognition accuracy when the state number is 2,000, respectively and the average 91.6% of the continuous speech recognition accuracy when the state number is 800. Also we haute carried out the word recognition experiments using the HTK (HMM Too1kit) which is performed the state tying, compared to share the parameters of the HM-Net topology design algorithm. In word recognition experiments, the HM-Net topology design algorithm has an average of 4.0% higher recognition accuracy than the context-dependent acoustic models generated by the HTK implying the effectiveness of it.

A Web Text Mining Technique using Semantic Relations based on WordNet and Text Corpus (WordNet과 텍스트 코퍼스에 기반한 의미 관계를 활용한 웹 텍스트 조사 기법)

  • Lee, Ho-Suk;Kim, Yung-Taek
    • Proceedings of the Korean Information Science Society Conference
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    • 2007.06c
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    • pp.181-184
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    • 2007
  • 본 논문은 문장 분석에 의하여 의미 관계를 생성하고 의미 네트워크에 의하여 유사한 의미 관계를 고려하는 의미 중심의 웹 텍스트 검색 기법에 대하여 논의한다. 기존의 웹 텍스트 검색은 단어만을 혹은 의미 관계만을 고려한 검색이었다고 할 수 있다. 그러나 문장 분석에 의한 의미 관계의 생성과 의미 네트워크에 의한 유사한 의미 관계의 고려는 기존의 단어 중심 혹은 의미 관계 중심의 검색 한계를 넘어서 유사한 의미 관계를 고려한 좀 더 포괄적이고 계층적인 검색을 가능하게 할 것으로 생각된다.

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