• Proceedings of the Korean Information Science Society Conference
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• 2011.06a
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• pp.233-236
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• 2011

일반적인 문서에 대한 정보 검색 연구는 활발히 진행되고 있으며, 일상 생활 속에서도 대중화되어 많이 사용되고 있다. 이에 따라 음성, 이미지 검색 등 특정 분야의 검색에 대한 연구도 활발히 진행되고 있지만, 수학식 검색에 대한 연구는 비교적으로 미비한 실정이다. 수학식 검색과 관련된 연구들은 대부분 MathML (Mathematical Markup Language), TeX 등으로 작성된 수학식을 대상으로 진행되었지만, 특정 언어나 별개의 수학 입력 툴들을 이용한 검색 방법은 일반 사용자들이 사용하기에는 쉽지 않다는 단점이 있다. 그래서, 본 논문에서는 일반 문서 검색과 마찬가지로, 수학식을 읽듯이 한글을 입력했을 때 색인어 추출 방법 및 검색 방법에 대해 제안한다. 실험을 위해서 수학 문제집에 나오는 1,432개의 수학식을 한글화 시켰고, 한글화된 결과에 대해 패턴 등을 추출하여 MRR (Mean Reciprocal Rank), $Rel_{EQ}$@N(Relevance evaluation at N)로 평가하였다. 100개의 한글 질의어에 대해 MRR@5로 계산된 수학식 검색 결과가 약 0.6 정도 되는 것을 확인할 수 있었고, 학습 데이터에 포함되지 않은 질의수학식 5개에 대해 $Rel_{EQ}$@5로 계산했을 때 평균 60% 의 정확률을 보였다.

• Spatial Information Research
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• v.21 no.4
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• pp.7-14
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• 2013

Recently, R&D(Research and Development) is processing actively on range search in the road network environments. However, the existing representative range search techniques have shortcomings in that the greater the number of POI's, the more increased storage space or the more increased search time due to inefficient search process. Accordingly, In this paper, we proposed a range search technique using QRMP(QR-tree using Middle Point) to solve the problems of conventional range search techniques. In addition, we made a formula to obtain the total size of the storage space for QRMP and proved the excellence of the range search technique proposed in this paper through the experiment using actual road networks and POI data.

• KIISE Transactions on Computing Practices
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• v.20 no.9
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• pp.498-506
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• 2014

With the development of smart transportation, people are likely to find their paths by using navigation and map application. However, the existing retrieval system cannot output the correct retrieval result due to the inaccurate query. In order to remedy this problem, set-based POI search algorithm was proposed. Subsequently, additionally a method for measuring POI name similarity and POI search algorithm supporting classifying duplicate characters were proposed. These algorithms tried to compensate the insufficient part of the compensate set-based POI search algorithm. In this paper, accuracy improvement methods for measuring string similarity in POI data retrieval system are proposed. By formulization, similarity measurement scheme is systematized and generalized with the development of transportation. As a result, it improves the accuracy of the retrieval result. From the experimental results, we can observe that our accuracy improvement methods show better performance than the previous algorithms.

• Proceedings of the Korea Multimedia Society Conference
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• 1998.10a
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• pp.401-406
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• 1998

본 연구에서는 SGML 문서의 포맷팅과 변환을 지원하는 DSSSL 처리기를 개발하였다. 본 논문에서는 DSSL의 문서 처리 과정과 이를 지원하는 처리기의 개발 방법을 소개한다. 또한 개발 결과를 다양한 문서처리 환경에 적용하여 DSSL의 우수성과 개선이 요구되는 부분에 대하여 기술한다. 그 결과 DSSL은 구조 기반 검색을 지원하는 질의 언어와 다양한 연산기능을 지원하는 수식 언어에 기반하기 때문에 강력한 포맷팅과 변환기능을 제공한다. 그러나 처리 방식의 특성상, DSSL은 사용자 인터랙션이 많으며 위지윅한 문서 환경보다는 일괄처리 방식의 문서 처리 분야에 더 적합하다.

• Journal of the Computational Structural Engineering Institute of Korea
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• v.30 no.4
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• pp.289-296
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• 2017

In this paper, geometrical optimization for newly designed flapping mechanism for insect-like micro air vehicle is presented. The mechanism uses strings to convert rotation of motor to reciprocating wing motion to reduce the total weight and inertial force. The governing algorithm of movement of the mechanism is established considering the characteristic of string that only tensile force can be acted by string, to optimize the kinematics. Modified pattern search method which is complemented to avoid converging into local optimum is adopted to the geometrical optimization of the mechanism. Then, prototype of the optimized geometry is produced and experimented to check the feasibility of the mechanism and the optimization method. The results from optimization and experiment shows good agreement in flapping amplitude and other wing kinematics. Further research will be conducted on dynamic analysis of the mechanism and detailed specification of the prototype.

• The Journal of the Korea Contents Association
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• v.21 no.12
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• pp.1-12
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• 2021

An objective expert discrimination scheme is needed for finding researchers who have insight and knowledge about a particular field of research. There are two types of expert discrimination schemes such as a citation graph based method and a formula based method. In this paper, we propose an efficient expert discrimination scheme considering various characteristics that have not been considered in the existing formula based methods. In order to discriminate the expertise of researchers, we present six expertise indices such as quality, productivity, contributiveness, recentness, accuracy, and durability. We also consider the number of social citations to apply the characteristics of academic search sites. Finally, we conduct various experiments to prove the validity and feasibility of the proposed scheme.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.38A no.6
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• pp.459-464
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• 2013

In this paper, we introduce a modulation code design problem where best selection of two-dimensional codewords are determined to reduce two-dimensional (2D) intersymbol interference (ISI) and interpage interference (IPI). Codeword selection problem is formulated as a quadratic integer programming model that minimizes intra- and inter-symbol differences subject to uniform symbol usage and minimal Hamming distance violations. Second integer programming model detects the occurrence of isolated pixel pattern in the selected codewords. The proposed models are applied to 4-level and 2-level 6/8 codes.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.11 no.4
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• pp.1468-1474
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• 2010

The establishment of a successful business must be preceded by comprehensive entrepreneurial preparation and research, as well as the development of a truly attractive business idea. Research to-date has tended to be based solely on factors relating to entrepreneurial activity or business performance. Research into the development and evaluation of a business idea has been insufficient. The purpose of this research is to propose a methodology for evaluating the attractiveness of a business idea objectively. This research measures the attractiveness of a business idea by the click through rate (CTR) to a website generated by specific keyword entry into internet search engines. The attractiveness of a business idea can be presented by the formula: number of relevant keyword searches x CTR on search results. As the number of searches for individual keywords is published by the search engines and it is possible to estimate CTRs for specific search results, we can objectively evaluate the attractiveness of a business idea. By analyzing keyword search data and CTRs obtained from search engines over a one month period, 1124 keywords that relate to foreign language education have been identified. A regression formula has also been derived, predicting the click through rate for search results. This research and its findings can be used to raise the success rates of new businesses; proposing objective guidelines for business idea development and evaluation. It is particularly meaningful because it introduces a new methodology to the arena.

• The KIPS Transactions:PartB
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• v.10B no.7
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• pp.735-742
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• 2003

In the information retrieval system, document clustering technique is to provide user convenience and visual effects by rearranging documents according to the specific topics from the retrieved ones. In this paper, we clustered documents using K-Means algorithm and present the effect of index terms weighting scheme on the document clustering. To verify the experiment, we applied Latent Semantic Indexing approach to illustrate the clustering results and analyzed the clustering results in 2-dimensional space. Experimental results showed that in case of applying local weighting, global weighting and normalization factor, the density of clustering is higher than those of similar or same weighting schemes in 2-dimensional space. Especially, the logarithm of local and global weighting is noticeable.

• Journal of Sericultural and Entomological Science
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• v.34 no.2
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• pp.59-66
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• 1992

1-4령 저염인공사료 공동육＋5령 뽕잎육(농가개별육)$\longrightarrow$일주일 양잠에 적합한 광식성 누에품종육성에 필요한 기초지식을 얻기 위해 광식성유전자의 검색, 유전현상, 특성, 광식성계통 작출, 실용광식성 누에 품종육성방법 등에 대하여 소고하였다. 1. 광식성 유전자의 검색은 의잠을 사용하는 것이 가장 성력적이고 편리하며, 또한 섭식성을 정확히 파악할 수 있다. 2. 광식성 누에의 LP-1 사료에 대한 섭식성은 사육온도, 광조건, 발육단계 및 절식에 의하여 크게 영향 받지 않는다. 3. 광식성 유전자는 열성형질이며 1개의 주유전자와 수개의 수식유전자로 구성되어 있는 것으로 추찰된다. 4. LP-1 인공사료에 첨가한 morin 및 n-hexacosanol의 누에 섭식촉진효과는 미소하였으나, 상엽분말 첨가로 인한 누에 섭식촉진효과는 매우 양호하였다. 5. 광식성누에의 섭식성은 어분 및 효모에 의해 영향받지 않았다. 6. 섭식저해물질인 brucin 및 salicine은 정도의 차는 있으나 광식성누에의 섭식성을 저해하였다. 7. 광식성 및 비광광성누에의 LP-1 인공사료에 대한 섭식성의 차이는 누에의 두부에 있는 감각기관의 형태적 차이 때문이 아니라 기능적 차이에 기인하는 것으로 추찰된다. 8. 광식성 육성소재창출은 광식성유전자의 도입육종에 의해 가능하다. 9. 실용 광식성 누에품종육성을 위해 광식성검정에 적합한 인공사료를 사용하고, 실용형질이 우수하면서도 광식성유전자를 가진 계통을 선발, 교잡 또는 계통육성법에 의해 실용형질 및 섭식성을 개량하여 육종 목표를 달성하는 것이 최선책으로 생각된다.