• 한국발생생물학회:학술대회논문집
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• 한국발생생물학회 2004년도 추계학술대회
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• pp.34-35
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• 2004

• 한국발생생물학회:학술대회논문집
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• 한국발생생물학회 2001년도 전기 제11차 학술대회 논문집
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• pp.71-73
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• 2001

밀어 (Rhinogobius brunneus)의 난자형성과정에서 난황전구 단백질 (vitellogenin, Vg)의 변화 및 estrogen에 의한 혈청단백질의 유도에 관하여 조사하였다. 혈청내 Vg는 분자량 190, 130 및 115 kDa(reduced form)으로 난자의 성숙과정에서 peptide cleavage가 일어났다. 수컷 밀어에 17$\beta$-estradiol을 1회 주사한 후 48시간에 다량의 Vg로 추정되는 단백질이 유도되어 1주간 지속되었으며 이후로 감소하였다. 이러한 현상은 동계적응 밀어에서는 관찰되지 않았다. 환경 estiogen의 일종인 nonylphenol을 주사하여 Vg으로 추측되는 혈청단백을 유도하였다. 밀어는 환경에스트로젠에 의한 수컷에서 Vg유도에 적합한 실험어류로 사료된다.

• 한국발생생물학회:학술대회논문집
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• 한국발생생물학회 2001년도 전기 제11차 학술대회 논문집
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• pp.57-61
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• 2001

• 아동학회지
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• 제31권6호
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• pp.1-13
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• 2010

This study examined the time-dependent effects of changes in private education on the trajectories of academic achievement among early adolescents. Five-wave data was employed from the KYPS; the participants being 2844 (1524 boys, 1320 girls). All were 4th graders in 2004 and became 8th graders in 2008. Latent growth curve model indicated that academic achievement significantly decreased over the five time points, but there were significant individual differences as well. Participants who reported higher initial levels of academic achievement tended to decrease in academic achievement more slowly over time compared to participants who reported lower levels of initial academic achievement. The effects of private education on academic achievement were at their most powerful when participants were in the 4th grade. Private educational experiences among 6th graders had relatively less influence upon the academic achievement of 7th graders.

• 한국생활과학회지
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• 제16권6호
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• pp.1141-1152
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• 2007

The purpose of this study was to investigate developmental changes of metamemory. The subjects were 120 5, 7, and 9 year-old children. All children performed metamemory tests which were composed of person variable, task variables, and strategy variable. There were significant age differences in metamemory awareness. As for person variable, prediction accuracy was increased with age. As for task variables, older children recognized aims of tasks, whereas younger children perceived salient properties of tasks. Also, as for strategy variable, number and complexity of strategy for memory retrieval were increased with age.

• 아동학회지
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• 제19권2호
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• pp.185-200
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• 1998

This research examined the development in Korean children of the comprehension of complex sentences. The relative difficulty in comprehension of the temporal conjunctions "before" and "after" was investigated. The order of mention, contextual support, and syntactic appearance was controlled. The role of cognitive strategies and developmental changes in the comprehension of these conjunction was included in this study. Subjects were 90 preschool children between 3 and 5 years of age. The task was a sentence-picture matching problem having 3 types of sentences combining temporally with "before" or "after". The results were that developmental changes in comprehension of the temporal conjunctions "before' and "after" in Korean children depended on the order of mention, contextual support, and such syntactic factors as the position of the subject of the sentence. The importance of the consistency in the occurrence of events and the order of mention in the acquisition of complex sentences among Korean children is similar to the acquisition of complex sentences in other languages.

• 대한가정학회지
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• 제49권3호
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• pp.55-66
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• 2011

The purpose of this study was to examine the effects of We Start home visiting intervention program on the positive changes of infants and their low-income families. The subjects were 171 18~36-month olds and their mothers living in We Start and non We Start areas. The instruments used were Developmental Profile, Cleminshaw-Guidubaldi Parent Satisfaction Scale(CGPSS) and Home Observation for Measurement of the Environment(HOME). The results were as follows: First, the result of Developmental Profile showed positive changes in all domains(physical development, self-help skills, social development, cognitive development, and communication ability). Second, the result of CGPSS showed positive effects on parent-child relationships. Third, the result of HOME showed positive effects on mothers' emotional and language responses. In conclusion, We Start home visiting program for infants from low-income families is an effective early intervention program to end intergenerational transition of poverty in Korea.

• Asian Journal of Innovation and Policy
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• 제2권1호
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• pp.1-19
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• 2013

As the catch-up innovation system was exposed to a new competition environment in which second-tier catch-up countries reduced the gap with Korea and advanced Korean firms entered into the frontier product market, it is experiencing system delay in terms of organizational and policy change. Therefore, innovation policy needs to be reorganized from a dynamic perspective to analyze the problems in the transition period and enable the system to overcome organizational and institutional delays. This article investigates the characteristics of transition periods in terms of external environment changes and internal socio-economic pressures. Based on the analysis of environment changes and catch-up system characteristics, it suggests the framework for policy intervention, direction, and practical principles for post catch-up innovation policy. In particular, it suggests the network-based developmental state and policy implementation in order to overcome the limitation of centralized developmental state of catch-up periods.

• 한국토양동물학회지
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• 제6권1_2호
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• pp.1-6
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• 2001

Although the earthworm is an important animal species capable of regenerating missing body part, earthworm regeneration is not well understood at the tissue, cell and molecular levels. In order to understand the developmental changes of blastema during earthworm tail regeneration, the formation and development blastema during regeneration was investigated by histological analysis. Within 1 day after amputation, dediffentiating blastemal cells appeared in coelomic side of longitudinal muscle layer. At 3 days postamputation, proliferating blastemal cells migrated into coelum and blastema was formed beneath wound epithelium around 7 days after amputation. Segmentation of blastema was observed around 2 weeks after amputation followed by redifferentiation of nephridium, intestine, setae and septa.

• 대한가정학회지
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• 제37권5호
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• pp.1-18
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• 1999

The purpose of the study was to specify the gender differences and the developmental changes of adolescents' self-esteem. The data was collected from 497 middle school students who were living at Pusan Korea through the questionnaire method by short-term longitudinal research design of 9 months interval. During the first datacollection session, May 1997, the participants completed the multidimensional self-esteem inventory that includes self-esteem dimensions such as home self, peer-related self, teacher-related self, academic-general self, physical-appearance self, physical-competence self and personality self. And during the second datacollection session, the participants completed the same questionnaires of the first session. The major findings of this study were as follows: First, the boy's self-esteem such dimensions of home self, teacher-related self, physical-appearance self, physical-competence self and personality self were significantly higher than those of girls. Second, the home self, peer-related self, teacher-related self, and academic-general self were decreased over time.