• School Mathematics
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• v.1 no.1
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• pp.19-37
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• 1999

In this study, we examined some matters related to the learning of variable concept in school mathematics on the basis of the theoretical foundation from the previous studies(e.g. Davis, 1975; Rosnick, 1981; IK chemann, 1981; Wagner, 1983.) and practices on variable concept teaching by evaluating the current state of that. Matters be discussed are as follows; the use of symbol for place holders in elementary mathematics, the dealing with sets those elements are literals and operations of such sets, the teaching of dummy variable, the construction of literal expressions that contains variables, the labeling indeterminates as a constant, the change in the exact meaning of variable according to the function concept, the teaching of a generalization by means of variables. After considering on these matters that are connected with the teaching-learning of variable concept, we suggested the alternative proposal to the current state of variable concept teaching.

• Journal of The Korean Society of Agricultural Engineers
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• v.54 no.1
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• pp.73-81
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• 2012

For planning and developing rural regions, it is very important to understand and utilize regional characteristics including social, demographic, and economic aspects. The purpose of this study is to find effective analysis techniques and provide a procedure design for mining regional characteristics in South Korea through reviewing and analyzing 41 related studies. The engaged research methods can be classified into five categories (PCA+CA, PCA, CA, GIS, and PCA+GIS) with the combination of three methodologies: principal component analysis (PCA), cluster analysis (CA), and geographical information system (GIS). The combination of PCA and CA occupied about 40 % of research methods used in related studies. The analysis tool of Korean Rural Information Supporting System (KRISS) is designed based on the outcomes of this study and applied to classify the regional capacity of agriculture using agricultural census data (2000) for evaluating its applicability.

• Clinical and Experimental Pediatrics
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• v.52 no.2
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• pp.142-151
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• 2009

The incidence of small for gestational age (SGA) births is frequent, accounting for 2.3% to 8% of all live births. Several childhood and adult diseases are related to early postnatal growth and birth size, and 10% of children born SGA may have a short stature throughout postnatal life. Additionally, they may have abnormal growth hormone (GH)-insulin like growth factor axis, HPA axis, and gonadal function. Permanent changes are detrimental in an environment of nutritional abundance, and predispose SGA children to an array of diseases in adolescence and adulthood. Such changes may also cause premature pubarche, adrenarche, and precocious puberty. The varying results from clinical studies necessitate more prospective case control studies. Reproductive tract abnormalities and reproductive dysfunction are related to SGA births. GH treatment is required for SGA infants who do not experience catch-up growth.

• Proceedings of the Korea Contents Association Conference
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• 2009.05a
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• pp.1049-1054
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• 2009

Jeju Special Self-governing Province continues to try to attract tourists on the basis of an active investment in the tourist industry. But most of the researches and studies on Jeju Tourism were made on a viewpoint of hardware. Therefore, the researches and studies which are related to 'the inclination of tourists who visit Jeju Island', 'the tourist satisfaction by a selection of tourist destination' and 'tourists' activities after the visit to Jeju Island' are insufficient. Accordingly, this study will support a basic datum needed for formulating a policy of Jeju tourism by closely examining the related influences among the Jeju tourists' inclination, their satisfaction and their activities after a tour of Jeju.

• The Journal of Society for e-Business Studies
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• v.4 no.2
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• pp.209-220
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• 1999

Quick response in the textiles and clothing industry is widely recognized at a strategic concept implemented by information technology to transfer changes in customer needs to the final product as soon as possible. This paper addresses which factors should affect the adoption of quick response systems in Korea. We surveyed 108 companies in the textile and clothing industry by using a questionnaire. We asked whether they adopted QR or not, and measured the usage level of QR-related ITs and the level of both internal and external factors in Likert's scale. We conducted multiple linear regression to analyze the data collected by using SAS. The findings are as follows: The adoption of QR, measured by the usage level of QR-related ITs, is positively affected by internal factors such as the recognition of QR concept and the capability for IT applications and by external factors such as the overall informating level of the industry, the needs for cooperation between organizations, and the leadership as an industry coordinator.

• Journal of Arbitration Studies
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• v.23 no.3
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• pp.61-80
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• 2013

The U.S. Supreme Court delivered a decision on the case between AT&T and Concepcion, which confirmed the contractuality of a defense as a threshold to distinguish between what is a viable defense for invalidation of consumer arbitration agreement and what is not. In this paper, the adhesiveness of arbitration clause, which is a unique character for consumer arbitration, is investigated in the U.S. as a legal defense to invalidate the consumer arbitration agreements, and its contractuality and related legal doctrines are analyzed. The legal issues of consumer arbitration have been analysed in several legal perspectives including the voluntary, knowing and intelligent doctrine, doctrine of separation, contract of adhesion and the contractuality of defenses. Among all of these, the first three issues are related with arbitration clause, and the last one, the contractuality of defenses, reflects the nature of defenses invalidating the consumer arbitration agreement.

• Korean Journal of Child Studies
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• v.23 no.2
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• pp.89-105
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• 2002

This study investigated characteristics and types of ideal maternal behaviors in three different cultures : Korea, the United States, and France. The 18 experts from each of the 3 cultures who participated in this study had knowledge and experience related to infant development and parenting. Based on the principles of Q-methodology, the experts sorted 40 Q-items representing maternal behavior related to infancy. After rating each item on a scale from "least desirable" to "most desirable" maternal behaviors, the experts described their reasons for the classification. Results identified some clear similarities and differences among cultures. pooled responses yielded 3 types of ideal maternal behaviors: perfective, child centered, and realistic perspective.

• Korean Journal of Child Studies
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• v.20 no.4
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• pp.75-89
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• 1999

Mother-Child Interactions during Problem Solving were analyzed in relation to the child's attachment security and temperament. Subjects were fifty-three 44-to 57-month-old children and their mothers. Attachment security was assessed by Attachment Q set (Waters, 1987); mother-child interactions were observed at home, and maternal ratings of child temperament were collected by questionnaire (Chun 1993). Attachment security scores were positively related to mother's cognitive assistance and positively interactions with the child and to the child's positive affect toward mother. The child's activity perceived by mother was negatively related to mother's efficient interactions and positively to the child's "reliance on mother." The child's behavior toward the mother in the task session and the child's temperament added variance above attachment in accounting for the mother's behavior.

• Korean Journal of Child Studies
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• v.25 no.4
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• pp.147-162
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• 2004

Children 5 and 8 years of age and undergraduates constructed stories using the wordless picture book, "Frog, where are you?" On a separate task, they explained the good and bad behaviors of others. The constructed stories of task 1 and responses of task 2 were audiotaped, analyzed by clauses, and then coded into the mind-related categories. Results showed that on both tasks the subjects used the actor's desires and intentions much more than the other categories of mind. Undergraduates used more mind-related expressions in making their stories than children, but they were not different from children in considering the minds of others for behavior explanations. Positive but non-significant correlations were found between scores in constructing stories and scores in behavior explanations.

• Korean Journal of Child Studies
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• v.30 no.4
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• pp.241-256
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• 2009

This survey of children's perceptions and experiences of death was conducted with 118 6th-grade elementary school children in Seoul. Data consisted of responses to questionnaires in three categories : (1) perceptions of death, (2) views of afterlife, and (3) death-related experiences (life, education, and media). Results showed that children had negative emotions (61.8%) such as fear and anxiety about death. Children's attitudes about suicide were sympathetic (34.5%) as well as critical (53.7%). There was no relation between religion and view of afterlife. Finally, children experienced death more through mass media (TV, internet, etc.) than through life experience or death education. This study suggests the necessity for death education and warns of negative effects of media and games.