• KIPS Transactions on Software and Data Engineering
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• v.2 no.2
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• pp.119-122
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• 2013

Repetitive strings such as periods have been studied vigorously in so diverse fields as data compression, computer-assisted music analysis, bioinformatics, and etc. In bioinformatics, periods are highly related to repetitive patterns in DNA sequences so called tandem repeats. In some cases, quite similar but not the same patterns are repeated and thus we need approximate string matching algorithms to study tandem repeats in DNA sequences. In this paper, we propose a new definition of approximate periods of strings based on distance sum. Given two strings $p({\mid}p{\mid}=m)$ and $x({\mid}x{\mid}=n)$, we propose an algorithm that computes the minimum approximate period distance based on distance sum. Our algorithm runs in $O(mn^2)$ time for the weighted edit distance, and runs in O(mn) time for the edit distance, and runs in O(n) time for the Hamming distance.

• Journal of KIISE:Computer Systems and Theory
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• v.29 no.2
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• pp.87-93
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• 2002

A new approach of constructing a suffix tree $T_s$for the given string S is to construct recursively a suffix tree $ T_0$ for odd positions construct a suffix tree $T_e$ for even positions from $ T_o$ and then merge $ T_o$ and $T_e$ into $T_s$ To construct suffix trees for integer alphabets in linear time had been a major open problem on index data structures. Farach used this approach and gave the first linear-time algorithm for integer alphabets The hardest part of Farachs algorithm is the merging step. In this paper we present a new and simpler merging algorithm based on a coupled BFS (breadth-first search) Our merging algorithm is more intuitive than Farachs coupled DFS (depth-first search ) merging and thus it can be easily extended to other applications.

• The Journal of the Convergence on Culture Technology
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• v.5 no.2
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• pp.83-91
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• 2019

The purpose of this study was to investigate the relationship among the variables and the influence of premenstrual syndrome and stress response on the learning flow of nursing students. Method : The participants were 162 nursing students in K city, who were surveyed between June 1 and June 10, 2018, using self-report questionnaire. Result: There were positive correlation between premenstrual syndrome of participants and stress response(r=.389, p<.001). There were negative correlation between premenstrual syndrome and learning flow(r=-1.93, p<.014), between stress response and learning flow(r=-.216 p<.001). The variables for learning flow where stress response(${\beta}=-.314$, p<.001) and Psychological change of menstruation(${\beta}=-.358$, p<.001), with a coefficient of determination($R^2$) of 30.3%. The result of this study will be useful in preparing basic date for improvement of the learning flow of the nursing students and it will be necessary to develop educational programs and strategies related with the premenstrual syndrome and stress response disposition.

• Journal of Convergence for Information Technology
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• v.9 no.10
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• pp.94-100
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• 2019

This study presents the superiority of his calligraphy by analyzing the use, meaning, and calligraphy of nickname three dragon-man(yong-jeong) written by Kim Junghee before and after exile in Jeju Island. Based on the basic structure of the three dragon-man, the relationship between the times, the context, and the characters was studied. Through this change process, the difference of art engineering with other works was analyzed. Kim Junghee intentionally went through a difficult situation by using a nickname with a dragon. He wrote different meanings, uses, and typefaces of the nickname three dragon-man, depending on the circumstances. Finally, Kim Junghee used 'three dragon-man' to King Heonjong and Monk Choui to express his feelings and intentions. His writing was excellent in art engineering and unique in the world. All were found to be supported by his epigraphy insights. The results of this study will be a new methodology for analyzing the meaning of nicknames of ordinary artists.

• Journal of the Korea Society for Simulation
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• v.29 no.4
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• pp.85-94
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• 2020

In determining the feasibility of planning and launching railway transportation projects, various decision-making processes are essentially required. LCC(Life Cycle Cost) value including total construction cost and operation cost is estimated in approximation Model with rough guideline. In this study, modeling and simulation-based analysis method is proposed to support the decision making process of railroad transportation and derivation of LCC. Firstly, cost analysis model was constructed by collecting various existing rail transportation business data to enable analyze based on numerical data, and the result were analyzed by DOE(Design Of Experiments) and RSM (Response Surface Method) simulation. Professional commercial software tools were used for effective model construction and simulation. In order to verify the research results, the actual railroad transportation projects were selected, and the results of the analysis were compared.

• The Journal of the Korea Contents Association
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• v.22 no.4
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• pp.714-726
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• 2022

The purpose of this paper is to find out the way of utilizing phrases of Chinese poetry in Manjeongje and its musical characteristics. To this end, the roles of phrases contained in the Pansori words were classified into five patterns: landscape description, strengthening of pleasant emotions, strengthening of sad emotions, wordplay, and combination of various poems. As a result of analysis, phrases quoted in sad mood part consist of slow rhythm of Jinyangjo and Jungmori, and sad melody of Gyemyun-gil and Jingyemyun tone; thus, both the rhythm and melody are expressed in accordance with the mood of poems. On the other hand, the melody in the landscape description parts, and the rhythm in the joyful feeling and wordplay parts showed the characteristics of determining the mood. In addition, when applying the analysis results to the perspective of Pansori composition, it is necessary to discover novel texts, apply to editorials, and study musical implementation suitable for the original mood in order to create more artistic Pansori.

• Journal of Korea Society of Industrial Information Systems
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• v.14 no.2
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• pp.32-50
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• 2009

Since 1990 when order communication system(OCS) was first introduced, the use of information technology in medical service has been widely accepted in order to enhance quality and customer relationship as well as to increase managerial efficiency. Medical information system is rapidly increasing and is trying to make ubiquitous healthcare environment through telemedicine system. Especially, medical profession and government have taken interest in electronic medical record (EMR) system which can digitalize and manage all medical records in hospitals. By recording patient's medical information in real time, EMR system can improve service efficiency and customer service quality including short waiting time, various utilization of clinic information, and reduced cost.

• Proceedings of the Korea Water Resources Association Conference
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• 2021.06a
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• pp.468-468
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• 2021

도시의 개발은 불투수면의 증가, 토지이용의 변화, 용수 수요 증가를 초래하였고, 최근에는 기후변화 양극화 현상으로 도심내 물순환체계를 더욱 왜곡시키는 문제를 초래하였다. 1962년부터 서울의 도심지가 본격적으로 개발되기 시작하면서 7.8%였던 불투수율이 2010년에는 50%까지 증가하였다. 토지의 피복상태가 숲과 흙일 때는 강우의 10%는 하천으로, 토양 흡수는 50%, 증발이 40%가량 된다. 보통 토양에 흡수된 물은 토양층에서 머물렀다가 중간유출되어 하천으로 유입되거나 지하수로 전환된다. 그러나 개발로 인하여 아스팔트나 콘크리트로 포장된 경우 55%가 하천으로 유입되고 토양으로 흡수되는 양은 15% 정도로 강우가 급격하게 유출되어 빠져나가 버린다. 도시 불투수면적의 증가는 단순히 치수와 이수의 문제뿐만 아니라 도심의 하천 및 녹지공간에 조성되어 있는 생태계 유지에 필요한 최소한의 수량인 생태용수 확보마저 위협하고 있다. 도심 하천의 환경생태유량 확보는 하천의 정상적인 기능을 유지할 뿐만 아니라 하천의 자정 능력을 향상하며, 수생생물의 서식환경을 보존에 기여하므로 도심의 자연성 회복에 있어 매우 중요하다. 도시 생태환경은 녹지의 단절과 파편화로 연속성을 확보하지 못하고 있는데, 이렇게 단절되고 파편화된 생태계를 연결하여 생태축을 확보하면 도시 생태계의 건강성을 증진시킬 수 있다. 대부분의 도시에서 관리하고 있는 가로수 및 띠녹지 등 녹지공간(그린 네트워크, Green Network)을 활용하여 수원 함양이나 수질정화 기능(블루 네트워크, Blue Network)을 부여하면 녹지와 수자원을 연결한 그린-블루 네트워크를 형성하여 도시 생태용수확보에도 기여할 뿐만 아니라 나아가 도심 하천의 자연성 회복에도 기여할 것으로 기대된다. 본 연구는 도시의 가로수와 띠녹지를 활용하여 빗물저장 기능과 침투기능을 확대하기 위해 기존에 녹지 및 공원 관리 차원에서 가로수 도시계획이 수립되고 관련 사업이 진행되어 온 현행 제도상의 문제점을 검토하여 제도적 개선 방안을 제안하는 것에 목적을 둔다.

• Journal of the Korea Institute of Information Security & Cryptology
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• v.33 no.6
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• pp.1087-1098
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• 2023

The rapid advancement of artificial intelligence (AI) technology has led to its proactive utilization across various fields. However, this widespread adoption of AI-based systems has raised concerns about the increasing threat of attacks on these systems. In particular, deep neural networks, commonly used in deep learning, have been found vulnerable to adversarial attacks that intentionally manipulate input data to induce model errors. In this study, we propose a method to protect image classification models from visually imperceptible One-Pixel attacks, where only a single pixel is altered in an image. The proposed defense technique utilizes an autoencoder model to remove potential threat elements from input images before forwarding them to the classification model. Experimental results, using the CIFAR-10 dataset, demonstrate that the autoencoder-based defense approach significantly improves the robustness of pretrained image classification models against One-Pixel attacks, with an average defense rate enhancement of 81.2%, all without the need for modifications to the existing models.

• Journal of Korean Society for Geospatial Information Science
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• v.23 no.3
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• pp.41-47
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• 2015

To determine the accurate height, it should be considered geometric height difference obtained by levelling as well as the physical height difference what so called orthometric correction. The orthometric correction amount is small enough to ignore at flatland but the amount is big at high mountains, so it should be considered to obtain accurate height at high mountains. But the calculation process is difficult and complex, not easy to calculate. So, to make the process easy using a user-friendly visual, a orthometric correction calculation program Ortho-Calc. v1.0 was developed in this study. This program was adopted the algorithm of Nassar and Hwang & Hsiao, and Strang Van Hees and it could be to selectivily calculate the correction amount. The inspection result exhibited high accuracy with the standard deviation of 0.024mm by the comparison of previous study. Therefore, This program Ortho-Calc. v1.0 developed in this study, will contribute orthometric correction calculation quickly and easily. And, if this program is widely popular, it could be expected to make a contribution the Benchmark's official height renewal using orthometric correction.