• Journal of the Korean Data and Information Science Society
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• v.21 no.4
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• pp.689-697
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• 2010

In this study, we propose a new procedure for improving the character recognition of text area extracted from video images. The recognition of strings extracted from video, which are mixed with Hangul, English, numbers and special characters, etc., is more difficult than general character recognition because of various fonts and size, graphic forms of letters tilted image, disconnection, miscellaneous videos, tangency, characters of low definition, etc. We improved the recognition rate by taking commonly used letters and leaving out the barely used ones instead of recognizing all of the letters, and then using SVM and RDA character recognition methods. Our numerical results indicate that combining SVM and RDA performs better than other methods.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.14 no.2
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• pp.507-512
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• 2010

Many learning methods are recently being proposed for web-based remote education and a method commonly applied to web-based learning is learning through questions. In the existing methods, the difficulty of questions is chosen by learners in accordance with their level or questions are selected dynamically. As these methods are simply based on difference among questions presented, however, it is hardly possible for learners to study according to their abilities. To solve the problem, we adjusted the difficulty of questions presented based on information on individuals' weak points for different types of questions. Under the system individuals can learn by applying information on their abilities with regard to the type and difficulty of questions repeatedly, so the system can provide more effective distance learning. To overcome space restrictions in learning, also, we design and implement a mobile study system on the top of PDA platforms.

• Korean Journal of Food Science and Technology
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• v.28 no.2
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• pp.378-383
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• 1996

Dietary fibers (DF) have been used as functional food components due to the various health promoting activities. Dietary fibers have been separated from the peels of Korean tangerine by employing ultrafiltration (UF) membranes. Optimum conditions in a batch type ultrafiltration unit using YM100 (molecular weight cut-off, MWCO=100,000), YM 10 (MWCO=10,000) and YM1 (MWCO=1,000) membranes were : transmembrane pressure 7.5 psi, temperature of the peel extracts $35^{\circ}C$, and pH of the peel extract 3.0, respectively. The flux in YM 10 membrane unit was higher than that in YM 10 or YM 1 membrane unit. However, YM 100 membrane was superior to YM 10 or YM 1 membrane with respect to the recovery of the retentate and the contents of DF The contents of DF in the tangerine peel extract, in the 170 mesh retentate, and in the YM 100 retentate were shown to be 33.4%, 18.5% and 8.4% based on dry matter, respectively. Most dietary fibers were recovered at the separation stages of 170 mesh and YM 100.

• Ocean and Polar Research
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• v.26 no.2
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• pp.231-243
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• 2004

Sequential extraction was carried out on twenty two subsamples of three ferromanganese crusts from three seamounts (Lemkein, Lomilik, and Litakpooki) near the Marshall Islands in the western Pacific. The extraction was designed to fractionate Fe-Mn crust forming elements into low defined groups: (1) exchangeable and carbornate, (2) Mn-oxide, (3) Fe-oxyhyd.oxide, and (4) residual fraction. X-ray diffraction result shows that target material were well removed by each extraction step except for CFA in phosphatized crusts generation. According to chemical analysis of each leachate, most of elements in the Fe-Mn crusts are bound with two major phases. Mn, Ba, Co, Ni, Zn, (Fe, Sr, Cu, and V) are strongly bounded with Mn-oxide $({\delta}-MnO_2)$ phase, whereas Fe, Ti, Zr, Mo, Pb, Al, Cu,(V, P, and Zn) show chemical affinity with Fe-oxyhydroxide phase. This result indicates that significant amount of Al, Ti, and Zr can not be explained by detrital origin. Ca, Mg, K, and Sr mainly occur as exchangeable elements and/or carbonate phase. Outermost layer 1 and inner layer 2 which are both young crusts generations are similar in chemical speciations of elements. However, some of Fe-oxyhydroxide bounded elements (Pb, Y, Mo, Ba, Al, and V) in phosphatized innermost layer 3 are released during phosphatization and incorporated into phosphate (Pb, Y, Mo, and Ba) or Mn-oxide phase (Al and V). Our sequential extraction results reveal that chemical speciations of elements in the hydrogenetic crusts are more or less different from interelemental relationship calculated by statistical method based on bulk chemistry.

• Proceedings of the Korean Operations and Management Science Society Conference
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• 1996.04a
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• pp.693-698
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• 1996

새로운 기술 활용에 직접적인 영향을 받는 사람들은 기존 사고와 행동을 변화해야 할 필요성을 인식하지만 대개의 경우 현재 상황에 집착하게 된다. 따라서 조직원에게 변화의 방향을 제시하고 이것이 필수적인 것이며 동시에 성취 할 수 있다는 확신을 주어 그들의 사고를 다시 재구성 할 수 있도록 한다면 조직내의 성공적인 변화 관리를 할 수 있다. 본 논문에서는 조직 변화 관리를 성공적으로 실행하기 위하여 변화의 본질을 이해하고, 변화를 방해하는 위험 요소를 최소화 하는 방법론, 구체적인 변화 관리 실행계획 수립 절차, 각 단계별 생성되는 산출물, 진단도구(Tool)를 제시하며, 특히 평가단계에서는 변화의 초기 목표와의 차이 분석을 통하여 조직 전체에 효과를 확장할 수 있도록 필요한 기술, 지식, 태도 등을 추출하여, 변화가 ongoing 프로세스이며 지속적인 개선 활동과 연계되어야 한다는 점에 대해 논한다.

• Proceedings of the IEEK Conference
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• 2003.07e
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• pp.2008-2011
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• 2003

얼굴인식의 전처리 단계는 주위의 배경으로부터 얼굴 영상을 분리하여 분석해야 한다. 이러한 전처리 단계는 환경적 요인으로 인해 많은 어려움을 가지고 있다. 또한, 개인별 특징의 차이, 얼굴의 기울어짐과 회전각도 및 영상내의 얼굴 크기 등으로 인해 어려움이 존재한다. 원영상을 입력받아 피부색을 통해 얼굴영역을 검출해 내어 사람의 표정변화에 가장 강인한 코 부분을 추출하여 워터쉐이드 변환을 하여 각 개인마다 다르게 가지고 있는 코의 패턴의 데이터를 저장하여 얼굴 인식에 이용할 수 있는 인자 값으로 이용한다. 따라서, 본 논문에서는 얼굴인식의 특징값을 코의 패턴을 이용하여 인식함으로써 다른 논문에서 제시하고 있는 눈의 특징이나 얼굴 각의 특징의 단점을 극복하여 보다 정화한 얼굴 인식을 할 수 있는 전처리 방법을 제시한다.

• Proceedings of the Korean Information Science Society Conference
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• 2006.10b
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• pp.98-101
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• 2006

본 논문에서는 얼굴영상 인식의 전처리 단계인 피부 영역 자동 검출시 적용 가능하며 조명변화에 강건한 피부 영역 검출을 위한 혼합 컬러모델을 제시한다. 또한, 사용자별로 차이를 보이는 다양한 피부색을 자동으로 인식하고 사용자에 적합한 피부색 영역을 결정하기 위하여 제시한 컬러 모델을 기반으로 한 피부색 영역 모델링 전처리 단계를 제시한다. 우선, 사용자 및 사용 카메라에 따라 차이를 보이는 피부색에 대한 영역 모델을 구축하기 위하여 화면상의 가운데에 손이나 얼굴 영역이 위치하도록 하고 일정 프레임의 화면 정보를 취득한다. 취득 화면 정보로서 각 픽셀에 대한 정규화 된 RGB 성분 및 H 성분, V 성분 정보를 추출하고 이에 대한 평균화된 혼합 컬러 모델을 구축한다. H성분으로 피부색과 비슷한 배경을 제거하고 여기에 YUV 성분 중 적색에서 밝기 값을 뺀 성분인 V 값을 한 번 더 사용하여 밝기 값을 제거한 보다 뚜렷한 얼굴영역을 검출한다.

• Proceedings of the Korea Information Processing Society Conference
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• 2021.11a
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• pp.476-479
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• 2021

DBMS 파라미터 튜닝이란 데이터베이스에서 제공하는 다양한 파라미터의 값을 조율하여, 최적의 성능을 도출하는 과정이다. 데이터베이스 종류에 따라 파라미터 개수가 수십 개에서 수백 개로 다양하며, 각 기능이 모두 다르기 때문에 최적의 조합을 찾는 것은 쉽지 않다. 선행 연구에서는 BO 기법을 사용하여 적절한 파라미터 값을 추출했지만, 파라미터 개수에 비례하여 차원이 커지는 문제가 발생한다. 본 논문에서는 통계적으로 파라미터를 분류하여 탐색 공간을 줄인 다음 단계적으로 BO 를 수행하는 PBO 방식을 제안한다. 파라미터 값을 랜덤하게 할당하여 벤치마킹한 결과값을 군집화한 후, 각 군집별로 파라미터와의 연관성을 분석해 높은 상관관계를 가진 파라미터를 매칭시켜 분류한다. 제안하는 방법론을 검증하기 위하여 8 가지 회귀 모델과의 비교 실험을 통해 제안한 방법론의 우수성을 검증하였다.

• Journal of Science Education
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• v.37 no.1
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• pp.1-10
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• 2013

The purpose of this study was to examine the effect of multiple intelligences-specific observation strategy on observation skills, achievement and scientific attitude in elementary science class For this study, the observation learning for the multiple intelligences-specific observation strategy was applied to elementary science class. The results of this study were as follows: To examine this learning materials were applied to elementary science curriculum, and an experimental group and a control group were selected from 4th graders at elementary school J located in Incheon. The results of this study were as follows.: 1. this study was found statistically significant difference in the pupil's enhancement of the observation ability(p<.05). Specifically, analysis of elements of the observation abilities, it was effective to increase abilities of classification of statements, qualitative observation and quantitative observation. 2. science academic achievement of the group using this developed program was significantly higher compared with a control group. 3. there weren't differences between the comparison and experimental groups in term of the scientific attitude. But the experimental group showed greater increases in the openness, spontaneity and creativity that are the elements of scientific attitude. In conclusion, the Multiple Intelligences Observation Training was useful to develop the elementary school student's the observation ability, science academic achievement, scientific attitude(openness, spontaneity and creativity) and better be widely applied to science education.

• Journal of the Korean Society for information Management
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• v.21 no.1
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• pp.231-251
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• 2004

This study aims to collect and manage in the step of creation metadata information to effectively manage and use official document which is a typical and normal records. To do it. data elements are extracted through analyzing structure of official document format. And we also select metadata elements reflecting creation background, publisher's intention, characteristic of official documents through evaluating and comparing extracted elements with data elements defined in ISAD rules. It would be draft data in constructing standardized metadata structure for records in Korea.