• The Journal of Korean Association of Computer Education
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• v.7 no.4
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• pp.15-25
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• 2004

Previous researches on the effect of programming learning upon logical thinking ability have used a standardized test to measure logical thinking ability in the general and comprehensive aspect after programming learning. Considering that the areas of intelligence are separated from one another and work independently, the existing standardized tool to measure general and comprehensive logical thinking ability has a limitation in measuring a logical thinking ability required at specific areas. Thus this study extracted logical thinking and its sub-factors related to computer programming and suitable for the level of cognitive development through analyzing standardized test sheets at home and abroad, and developed logical thinking test I and II of the same form according to a development procedure model. The result of verifying the developed logical thinking tests proved that the two tests are logical thinking tests of the same form. The developed tests can be utilized in identifying the effect of programming learning upon logical thinking and its sub-factors.

• Journal of the Society of Naval Architects of Korea
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• v.31 no.2
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• pp.91-98
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• 1994

An efficient optimization procedure combining the frequency approximation technique and the component-mode synthesis method is proposed for the structural dynamic optimization of the large structures subject to prescribed natural frequency constraints. Frequency constraints are approximated by using the first-order sensitivities with respect to both design parameters and their reciprocals. The component-mode synthesis method proposed by the authors in Ref.[8] is used for the repetitive detail finite-element analysis and sensitivity analysis. The validity of the proposed optimization procedure is confirmed through the numerical implementation of some examples. The presented approximation technique requires much smaller number of repetitive analysis than that using the sensitivities with respect to design parameters only, and further improvement in the numerical efficiency is achieved by the adoption of the introduced component-mode synthesis.

• Korean Journal of Legislative Studies
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• v.26 no.2
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• pp.5-33
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• 2020

Ahead of the 21st Korean National Assembly Election, the congressional election law was revised, and the semi-mixed member proportional system was introduced. The purpose of the revision of the election law was to increase the proportionality and representativeness of the election system through the institutional reform in the direction of promoting a multi-party system. This study shows that the effect of the introduction of the semi-mixed proportional system was compared with the election results when the previous proportional representative system was maintained. There was no significant difference from the results. This study reveals that contrary to the intention of institutional design to revitalize the multi-party system, the two large political parties took the most seats after democratization in 1987, resulting in an unintended consequences. In addition, with regard to the recent argument for party realignment, the Busan, Ulsan, and Gyeongnam regions have been dealigned in the Yeongnam regional cleavage, and are undergoing a process of party realignment. It has not yet entered the stage of realignment, but remains in the stage of fluid dealignment.

• Proceedings of the Korean Information Science Society Conference
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• 2002.04a
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• pp.655-657
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• 2002

데이터 마이닝 기술 중 하나인 연관규칙 마이닝의 병렬 알고리즘들은 동형질의 병렬 컴퓨팅 시스템을 대상으로 하여 개발되었다. 그러나, 이러한 병렬 알고리즘들은 클러스터 시스템 또는 Network Of Workstation(NOW)과 같은 저가의 프로세서들로 구성된 집합적인 병렬 컴퓨팅 시스템에서는 부적당하다. 이는 이들 시스템이 다른 성능을 가진 프로세서로 구성되어 있거나 여러 사용자의 접근을 허용하는 등의 이형성을 가지기 때문이다. 결과적으로 이러한 환경을 고려하지 않은 기존의 병렬 연관규칙 알고리즘들은 전체 시스템의 성능을 활용하지 못하게 되어 성능저하를 피할 수 없다. 본 논문에서는 대표적인 병렬 연관규칙 알고리즘인 Data Distribution 알고리즘을 위만 효과적이고 확장성 있는 동적 부하분산 알고리즘의 설계와 구현을 다룬다.

• Annual Conference on Human and Language Technology
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• 2015.10a
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• pp.216-219
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• 2015

컴퓨터를 이용하여 명사와 용언의 의미를 자동으로 분별하는 것은 기계번역이나 검색 등의 기술에서 아주 중요한 기반 기술이다. 최근에 동형이의어 분별에 대한 연구 결과로 약 96%의 정확률을 보이는 시스템이 개발되었으나, 다의어 분별에 대한 연구는 아직 초기 단계로 일부 어휘만을 한정하여 연구되고 있다. 본 논문에서는 어휘지도를 이용하여 다의어를 분별하는 방법을 연구하였고, 어휘지도에 등록된 모든 일반 명사와 용언을 대상으로 실험하였다. 제안된 알고리즘은 문장에서 나타나는 명사와 용언의 관계를 어휘지도에서 찾고, 그 정보를 기반으로 다의어를 분별하였다. 아직은 그 정확률이 실용적인 수준이라고 볼 수는 없지만, 전체 다의어를 대상으로 실험하였고, 그 실험 결과를 분석함으로써 앞으로의 다의어 분별 연구 방향에 도움될 것으로 판단된다.

• Proceedings of the Korean Society for Information Management Conference
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• 2013.08a
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• pp.123-128
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• 2013

본 연구는 한자어 접미사를 가진 학술용어 복합명사의 형태를 분석하고, 한자어 접미사를 가진 복합 명사의 범주화를 위한 알고리즘을 제시하는 것을 목적으로 한다. 연구의 배경은 구조적 학술용어사전의 구축과 관련하여 용어의 효율적인 개념화 방법론을 개발하는 것이다. 연구 목적을 이루기 위해 한자어 접미사를 가진 인문사회분야 복합명사의 형태를 분석하여, 출현 빈도가 10회 이상인 한자어 접미사를 각 분야별로 14개씩 추출하였다. 그리고 각 한자어 접미사가 배정된 개념범주와 개념범주 배정 빈도를 분석한 결과, 동음이의 한자어 접미사를 가진 경우 개념범주가 다양하게 배정될 수 있지만, 동음동형 한자어 접미사를 가진 경우에는 그렇지 않다는 특징을 파악하였다. 또한 특정 한자어 접미사가 하나의 개념범주에 배정된 빈도가 높고 그 외의 개념범주에 배정된 빈도는 현저히 낮을 경우 빈도가 높은 개념범주에 배정되는 것이 더 타당한 것으로 분석되었다.

• Tuberculosis and Respiratory Diseases
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• v.54 no.1
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• pp.33-44
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• 2003

Background : Mycobacterium avium complex(MAC) is the most common respiratory pathogen in nontuberculous mycobacterial pulmonary disease. This study described the clinical characteristics of the patients with pulmonary disease caused by MAC. Materials and Methods : The clinical characteristics of 24 patients with pulmonary disease caused by the MAC, who fulfilled the 1997 American Thoracic Society diagnostic criteria for nontuberculous mycobacterial pulmonary disease, were retrospectively analyzed. Results : Fourteen patients(58%) were male and the median age at diagnosis was 61 years(range 46-75). Of the 24 patients, 16(67%) had a M. intracellulare infection, 7(29%) had a M. avium infection and one patient was not identified. Coughing (92%) and sputum (88%) were most frequently observed symptoms. The sputum smear for acid-fast bacilli was positive in 17(71%) patients. Fourteen(58%) patients had the upper lobe cavitary form and 10(42%) patients had the nodular bronchiectatic form. In a comparison between the patients with the upper lobe cavitary form and those with the nodular bronchiectatic form, significant differences were found according to sex(male 86% vs. 20%, p=0.003), smoking history(79% vs. 10%, p=0.008), the presence of an underlying disease(64% vs. 20%, p=0.036), the pulmonary function(% forced vital capacity, median 71% vs. 88%, p=0.022; % forced expiratory volume in one second, median 69% vs. 89%, p=0.051) and bilateral disease at chest radiography(29% vs. 90%, p=0.005). The time from the onset of symptoms to diagnosis was longer in those with the nodular bronchiectatic form(median 72 months, range 8-132) than those with the upper lobe cavitary form(median 22 months, range 6-60) Conclusions : MAC pulmonary disease occurs in two distinct populations with two distinct clinical presentations. For a correct diagnosis of MAC pulmonary disease, knowledge of the diverse clinical and radiological findings is essential.

• Annual Conference on Human and Language Technology
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• 1994.11a
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• pp.305-312
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• 1994

품사 태깅은 코퍼스에 정확한 품사 정보를 첨가하는 작업이다. 많은 단어는 하나 이상의 품사를 갖는 중의성이 있으며, 품사 태깅은 지역적 문맥을 이용하여 품사 중의성을 해결한다. 한국어에서 품사 중의성은 다양한 원인에 의해서 발생한다. 일반적으로 동형 이품사 형태소에 의해 발생되는 품사 중의성은 문맥 확률과 어휘 확률에 의해 해결될 수 있지만, 이형 동품사 형태소에 의해 발생되는 품사 중의성은 상호 정보나 의미 정보가 있어야만 해결될 수 있다. 그리나, 기존의 한국어 품사 태깅 방법은 문맥 확률과 어휘 확률만을 이용하여 모든 품사 중의성을 해결하려 하였다. 본 논문은 어절 태깅 단계에서는 중의성을 최소화하고, 형태소 태깅 단계에서는 최소화된 중의성 중에서 하나를 결정하는 두단계 태깅 방법을 제시한다. 제안된 어절 태깅 방법은 단순화된 어절 태그를 이용하므로 품사 집합에 독립적이면, 대량의 어절을 소량의 의사 부류에 사상하므로 통계 정보의 양이 적다. 또한, 은닉 마르코프 모델을 이용하므로 태깅되지 않은 원시 코퍼스로부터 학습이 가능하며, 적은 수의 파라메터와 Viterbi 알고리즘을 이용하므로 태깅 속도가 효율적이다.

• The Journal of the Korea Contents Association
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• v.12 no.6
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• pp.41-47
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• 2012

Various Korean word sense disambiguation methods have been proposed using small scale of sense-tagged corpra and dictionary definitions to calculate entropy information, conditional probability, mutual information and etc. for each method. This paper proposes a method using Korean Word Space model which builds word vectors from a large scale of sense-tagged corpus and disambiguates word senses with the similarity calculation between the word vectors. Experiment with Sejong morph sense-tagged corpus showed 94% precision for 200 sentences(583 word types), which is much superior to the other known methods.

• Journal of Oral Medicine and Pain
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• v.37 no.4
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• pp.213-219
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• 2012

Oral appliances are a primary treatment option for snoring and mild to moderate obstructive sleep apnea (OSA) and are considered as an alternative for patients with severe OSA who have failed continuous positive airway pressure (CPAP) or upper airway surgery. But it is true that OAs have varying degrees of effectiveness depending on different oral appliances and the efficacy of OAs are established in some but not all patients. New oral appliance, which is one of Adjustable Anterior Positioners, was developed by Dept of Oral Medicine, Dental School, Dankook University. This is a report for treating severe OSA patient with a failure of previous uvulopalatopharyngoplasty using a new Adjustable Anterior Positioner, followed by significant success of controlling OSA.