• Journal of Elementary Mathematics Education in Korea
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• v.17 no.2
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• pp.225-243
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• 2013

This study was to analyze the effects of basic computational abilities using G-learning contents, which was developed for mathematically slow learners. The participant students were 146 mathematically slow learners in grade 3-6 in Seoul. The researchers analyzed the difference between pre and post test scores to check their effectiveness. Also, teachers and parents as well as students responded survey items to check dispositions and satisfactions towards the program. The research results showed that the application of the G-learning contents on basic computation areas was effective to develop students' basic computational skills. In addition, students also showed that they were satisfied studying basic computations with the G-learning contents. They had increased beliefs about and decreased difficulties in mathematics. Parents and teachers also had satisfactions in using the G-learning programs in spite of some negative effects such as errors in the contents, use of computers, and concentration on the game itself. For the improvement of G-learning contents, we need to keep studying on G-learning contents with wide range of areas and long term studies.

• The Journal of the Acoustical Society of Korea
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• v.12 no.2E
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• pp.80-87
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• 1993

본 논문에서는 겹침이 있는 물체의 인식을 위하여 겹침을 당한 물체의 가려진 부분에 대한 추정을 행하는 방법을 제안한다. 주어진 입력화상에서 정점의 호수점의 개수를 셈으로 겹침의 생성 여부를 알 수 있다. 또한 특징추출을 행하기전에 도형의 형태량에 기초하여 겹침을 당한 물체의 가려진 부분을 추정하여 본 논문의 유용성을 여러 실험에 의해 입증하였다.

• The Science & Technology
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• s.508
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• pp.68-69
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• 2011

정경택 교육과학기술부 국제과학비즈니스벨트기획단장은 '해결사'로 불린다. 지난해 교과부 과학기술정책실 정책조정기획관으로 부임해 국가 연구개발 컨트롤타워인 '국가과학기술위원회'를 성공적으로 출범시켰다. 다음 해결 주제는 '말도 많고 탈도 많던' 국제과학비즈니스벨트(과학벨트) 사업이었다. 그는 민간 전문가들로 구성된 '국제과학비즈니스벨트위원회'를 구성해 2년여를 끌어온 과학벨트 입지 선정을 지난 5월 마무리했다. 과학벨트 사업은 여전히 국내외 과학자들의 관심 대상 0순위다. 올 연말 기초과학연구원이 설립되고 내년엔 기초과학연구원 산하 연구단 25개가 선정된다. 과학자들에게 새로운 연구 기회가 생기는 셈이다.

• Proceedings of the Korean Society for Cognitive Science Conference
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• 2000.06a
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• pp.395-401
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• 2000

국어에서는 어떠한 대상의 수량을 표현할 때 수사와 함께 분류사(classifier)를 사용한다. 따라서 분류사는 그 특성상 수량 표현 구문을 형성하는 대상 명사와 의미적으로 밀접한 관련을 지니게되는데, 단순히 명사를 셈하는 것 뿐 아니라 명사의 의미적 특성을 명세(specify)해 준다고 할 수 있다. 본 연구에서는 이러한 명사와 분류사의 연관성에 초점을 맞추어 분류사의 사용에 따른 명사의 범주화 및 계층 구조를 보이고, 컴퓨터 말뭉치 자료를 이용하여 그 관계를 좀더 명확히 밝히는 것을 목적으로 한다. 이러한 연구는 언어를 전산적으로 처리하는데 필수적인 전산어휘부(computational lexicon)의 구축에 필요한 기초 작업이 될 수 있다.

• Journal of The Korean Association of Information Education
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• v.8 no.2
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• pp.141-153
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• 2004

Pupils with learning impediments in elementary schools have difficulties in learning numerical calculations. Numerical concepts, the basis of numerical calculations, require repetitious exercises, and it has been widely reported that computer-mediated learning motivates the learners to concentrate on their learning for longer hours. The aim of the research is to develop and apply a Web-based courseware to experimental groups to improve learning numerical concepts of the learners with learning difficulties in elementary school and to discuss the effects of the results. The courseware is designed to improve the numerical concepts of the learners through many thought activities. The experiment shows effectiveness of the learning activities to improve learning numerical concepts for students with learning difficulties, categorized into two groups - an experimental group and a control group, and also it shows positive responses on improvement of their calculation ability.

• Journal of Practical Agriculture & Fisheries Research
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• v.6 no.1
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• pp.116-135
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• 2004

This study was conducted to investigate effects of spent composts of Se-enriched mushrooms as the dietary Se source on muscular Se deposition and plasma glutathione peroxidase (GSH-Px) activity in the finishing Hanwoo steer. Twenty Hanwoo steers were used in the experiment and they were divided into four groups in a randomized complete block design with five replicates. Treatments were four levels (0.1, 0.3, 0.6 and 0.9ppm as fed basis) of dietary Se from the combination with spent composts of Se-enriched mushrooms and/or Se non-enriched mushrooms, in which each treatment was formulated with corn and corn gluten meal and so forth. Treatment diets were fed to Hanwoo steers for 90 days until the slaughter. Dry matter intakes had no significant differences among treatments and there were no significant differences for performances such as total BW gain and ADG among treatments. The Se concentration in blood was linearly increased with increasing dietary selenium levels and reached a plateau level after 8 weeks (p<0.001). Plasma GSH-Px activities had the similar trends to blood Se concentrations by showing that the increased dietary Se level significantly increased plasma GSH-Px activities of both total and Se-dependent (p<0.001). Muscle Se contents of Se-supplemented groups were linearly increased by 1.35 ~ 1.68 folds compared with the control group (0.1ppm; 0.273㎍/dry g) and especially those of the hind legs for 0.9ppm treatment showed the highest Se content as shown 0.457㎍ per dry gram (p<0.01) corresponding to approximately 70% increase of the control group. Se retention rate in the muscle of dietary Se originated from spent composts of Se-enriched mushrooms was estimated of maximum approximately 30% and dietary Se content showed the significant correlation with plasma GSH-Px activities and muscle Se contents (p<0.01). Accordingly, Se present in spent composts of Se-enriched mushroom as the dietary Se source not only had great bioavailabilities showing higher blood Se concentration and plasma GSH-Px activities, but also increased Se deposition in the muscle for Hanwoo beef cattle.

• Annual Conference on Human and Language Technology
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• 2000.10d
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• pp.395-401
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• 2000

국어에서는 어떠한 대상 의 수량을 표현할 때 수사와 함께 분류사(classifier)를 사용한다. 따라서 분류사는 그 특성상 수량 표현 구문을 형성하는 대상 명사와 의미적으로 밀접한 관련을 지니게 되는데, 단순히 명사를 셈하는 것 뿐 아니라 명사의 의미적 특성을 명세(specify)해 준다고 할 수 있다. 본 연구에서는 이러한 명사와 분류사의 연관성에 초점을 맞추어 분류사의 사용에 따른 명사의 범주화 및 계층 구조를 보이고, 컴퓨터 말뭉치 자료를 이용하여 그 관계를 좀더 명확히 밝히는 것을 목적으로 한다. 이러한 연구는 언어를 전산적으로 처리하는데 필수적인 전산어휘부(computational lexicon)의 구축에 필요한 기초 작업이 될 수 있다.

• Journal of the Korean Academy of Child and Adolescent Psychiatry
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• v.8 no.1
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• pp.101-112
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• 1997

The purpose of this study was to examine usefulness of KEDI-Individual Basic Learning Skills Test as a diagnostic tool of learning disorders(LD). Learning disorder group consisted of two subgroups, verbal learning disorder group(VLD, n＝34) and nonverbal learning disorder group(NVLD, n＝14). Comparison group consisted of Dysthymia Disorder subgroup(n＝11) and Normal subgroup(n＝20). Performance of intelligence test and achievement test was examined in all 4 subgroups. In KEDI-WISC, VLD subgroup revealed primary problems in vocabulary, information and verbal-auditory attention test. NVLD group revealed primary problems in almost all performance tests such as visual acuity, psycho-motor coordination speed and visual-spatial organizations ability subtest. In KEDI-Individual Basic Learning Test, VLD group revealed primary problems in phonological coding process, word recognition and mathematics. For successful classification of LD children, the importance of achievement test and intelligence test was discussed by discriminant analysis and factor analysis. The results indicate that KEDI-Individual Basic Learning Skills is of considerable usefulness in diagnosing LD, but must be used in subtests, and additional tests must be conducted for thorough exploration of LD.

• School Mathematics
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• v.11 no.1
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• pp.71-91
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• 2009

The purpose of this study was to analyze operation sense in detail with regard to division of fraction. For this purpose, two sixth grade students who were good at calculation were clinically interviewed three times. The analysis was focused on (a) how the students would understand the multiple meanings and models of division of fraction, (b) how they would recognize the meaning of algorithm related to division of fraction, and (c) how they would employ the meanings and properties of operation in order to translate them into different modes of representation as well as to develop their own strategies. This paper includes several episodes which reveal students' qualitative difference in terms of various dimensions of operation sense. The need to develop operation sense is suggested specifically for upper grades of elementary school.

• School Mathematics
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• v.11 no.4
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• pp.567-581
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• 2009

Many articles have reported that zero causes children's arithmetic errors. This article was designed to measure the effect of zero on children's arithmetic performances. For this, 222 of 3,4,5,6 graders in elementary school were tested with pencil and paper. The test were categorized into four parts: basic number fact, column subtraction, column multiplication, and column division. These data showed that the negative effect of zero on children's arithmetic was limited to several areas, concretely, multiplication facts with zero, column subtraction with numbers which have two successive zeros, column multiplication with numbers which have zero in a middle position, long division with zeros. But there was no evidence that students could self-control these negative effects of zero as grade went up. It implies that we should keep attention to children's arithmetic performance with zero in some special areas.