• Animal cells and systems
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• 제3권3호
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• pp.269-273
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• 1999

The distribution and relative frequency of somatostatin-immunoreactive cells in the pancreas were studied during developmental stages (fetus, neonate, 1-month-old, 6-month-old and adult) of the Korean native goat by immunohistochemical methods. Somatostatin-immunoreactive cells were detected in the exocrine of all ages, in the endocrine portions (pancreatic islets) from the neonate, and in the pancreatic duct of the 1-month-old. The relative frequencies of these cells in the pancreatic islets increased with age. However, there were no age-related changes in the relative frequencies of somatostatin-immunoreactive cells in the exocrine and pancreatic duct. Generally, they were distributed in the interacinar spaces, the epithelium of the pancreatic duct, or dispersed in the peripheral zone of the pancreatic islets in all ages. However, clusters consisting of 3-4 cells were also found in the subepithelial connective tissues from the 1-month-old. In addition, the distributions in the endocrine portions of the adult were divided into two patterns: 1) they are dispersed in the marginal regions with moderate or low frequencies, or 2) in the inner zone with high frequencies.

• 말소리와 음성과학
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• 제1권3호
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• pp.163-168
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• 2009

This study investigated the determination of speech rates, words per minute (WPM) and syllables per minute (SPM), of $5{\sim}7$ year-old normal children to understand if there are any differences in the rates according to the children's age and sex. All participants were required to conduct story retelling tasks (SRT) and picture description tasks (PDT). In SRT, there was a significant difference between the groups of 5 year-old and 7 year-old children on WPM. However, there was no significant difference between the groups of ages regarding SPM. In addition, there was no significant difference between the groups according to sex on WPM and SPM. In PDT, there was no significant difference between the groups according to their ages and sex on WPM and SPM. The current research found that the speech rates of the preschool children might be somewhat different in their utterance abilities according to their age, but there was no obvious difference according to their sex. The findings can advance development of a clinical tool to screen children with fluency disorders and to determine the steps in establishing speech rates of children in the language development period.

• Journal of the Korean Data and Information Science Society
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• 제28권3호
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• pp.525-532
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• 2017

최근 들어 OECD 국가 중 국내의 고령화 진입 속도가 가장 급속하게 증가하고 있는 추세를 보이고 있다. 이로 인해 노인 빈곤율 및 노인 부양에 대한 이슈가 사회적 문제로 대두되면서 노후대비에 대한 중요성도 증대되고 있다. 따라서 이 연구는 급속히 증가하고 있는 고령층으로 인하여 발생되는 사회적 부담 문제를 미연에 방지하기 위해 국내 중장년층 가구주들의 노후대비 유무와 노후준비 결정요인을 분석하고 집단별 포트폴리오 구축 유형을 분석하는데 목적이 있다. 연구 결과 노후대비를 위한 수단으로써 금융과 부동산을 결합한 상품을 개발한다면 노후대비 포트폴리오를 확대시킬 수 있을 것이라는 결론을 도출하였다. 위와 같은 연구 결과에 따라 인구통계학적 요인 뿐 아니라 보유 자원들의 정도에 따라 노후대비에 차이가 있다는 것을 알 수 있으며, 특히 보유 자원들에 영향을 미치는 다양한 요소들이 노후대비가구와 노후미대비가구별로 차이가 있다는 것을 알 수 있다.

• Journal of the Korean Data and Information Science Society
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• 제26권6호
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• pp.1199-1206
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• 2015

최근 들어 OECD 국가 중 국내의 고령화 진입 속도가 가장 급속하게 증가하는 추세를 보이고 있다. 이로 인해 노인 빈곤율 및 노인 부양에 대한 이슈가 사회적 문제로 대두되면서 노후대비에 대한 중요성도 증대되고 있다. 따라서 이 연구는 급속히 증가하고 있는 고령층으로 인하여 발생되는 사회적 부담 문제를 미연에 방지하기 위해 국내 중장년층 가구주들의 노후대비 유무와 노후준비 결정요인을 분석하고 집단별 포트폴리오 구축 유형을 분석하는 데 목적이 있다. 연구 결과 노후대비를 위한 수단으로써 금융과 부동산을 결합한 상품을 개발한다면 노후대비 포트폴리오를 확대할 수 있을 것이라는 결론을 도출하였다. 위와 같은 연구 결과에 따라 인구통계학적 요인 뿐 아니라 보유 자원들의 정도에 따라 노후대비에 차이가 있다는 것을 알 수 있으며 특히 보유 자원들에 영향을 미치는 다양한 요소들이 노후대비가구와 미대비가구별로 차이가 있다는 것을 알 수 있다. 따라서 지속적으로 노후대비 유무에 따라 차이가 발생되는 포트폴리오에 대한 연구를 진행하고 국내의 고령층에 맞는 포트폴리오 구성 요인 등에 대해 파악해야 한다. 또한, 더 정교한 추정모형을 통해 더 나은 시사점을 제공해야할 필요가 있으며 본 연구를 통해 이러한 연구의 초석을 다졌다는 점에 의의가 있다.

• 천문학회보
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• 제36권2호
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• pp.70.2-70.2
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• 2011

We present a study of the metallicities, ages, and alpha-elements of globular clusters (GCs) in nearby giant elliptical galaxies (gEs) (M87, M49, M60, NGC 5128, NGC 1399, NGC 1407, and NGC 4636) using data in the literature. We used only the data for the GCs derived from the comparison of absorption line indices with the single stellar population model. The metallicity distributions of GCs in these gEs are bimodal, showing the existence of metal-poor and metal-rich populations. All these gEs harbor young GCs with ages less than 5 Gyr as well as old GCs. The mean age of the metal-rich GCs ([Fe/H]>-0.9) is about 3 Gyr younger than that of the metal-poor GCs. The mean values for the alpha-elements of the GCs are smaller than or similar to that of the Milky Way GCs. All the GCs in these gEs show an age-metallicity relation; the larger the metallicities of the GCs are, the younger the GCs are. Old GCs with ages > 10 Gyr have two distinct sub-populations (metal poor and metal rich), while young GCs show a broad metallicity distribution with a single peak. We discuss these results in relation with the formation of GCs in gEs.

• 대한가정학회지
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• 제36권4호
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• pp.137-146
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• 1998

The purpose of this study was to compare the expectations of mothers and teachers regarding development of three-year-old children and to analyze factors influencing the expectations. The results of this study showed that the mothers held higher expectations than the teachers regarding development of their children in all areas. Maternal expectations differed depending on the ages of the mothers and their children's birth order. Teaching experience with three-year-old children also made differences in the teacher's expectations. Implications to parent education and suggestions for future studies were provided.

• Journal of Chest Surgery
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• 제24권12호
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• pp.1161-1167
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• 1991

The study consisted of all patients undergoing surgical repair of isolated secundum type atrial septal defect in patients ages 35 years or older for the period from October 1986 to October 1991. ASD was closed with direct suture in all patients. Response to surgery was excellent. Two patients who had atrial fibrillation was taken low-dose warfarin therapy to prevent stroke. All patients survived operation, and improved by at least one New York Heart Association functional classification. An old age was not a contraindication to surgery.

• 한국실내디자인학회:학술대회논문집
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• 한국실내디자인학회 2007년도 춘계학술대회 논문집
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• pp.75-76
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• 2007

Recently with increasing interest in the natural science history education, a lot of natural science museums have been developed in various locations. This project is located in one of the biggest Paleozoic site, Taebak Kangwon-do. This kind museum has had important rolls in terms of education for student, destination for traveling and reservation of important holdover of the old ages. To do those kind of parts, this project has been designed with concepts and themes like; i. being organized with story telling structure with theme "secret of life and earth from Taebak" ii. combining experiences between outdoor experimental search for the real fossils and indoor educational interactions with real size model and moving films. iii. designing with strong identities of Paleozoic era. For the design identities the outer appearance was designed with motive of trilbites in an abstract way and inside was finished with exposed concrete and various size of moving films projected to walls and floor to emphasize real scale experience of the old ages.

• 한국생활과학회지
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• 제22권1호
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• pp.17-27
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• 2013

The purpose of this study is to investigate children's liquid conservation concept according to their ages and task-situations in the water evaporation phenomenon. Thirty from each 4-, 6- and 8-year-old age groups (total of 90 subjects) were selected for this study. The subjects were recruited from two day-care centers, a kindergarten, and an elementary school, in Seoul. Statistical methods used for data analysis were frequencies, percentiles, means, standard deviations and repeated measures ANOVA. As a result, there was a significant difference in children's liquid conservation concept in the evaporation of water according to their ages and task-situations. 8-year-old children showed levels of cognition than 4- and 6-year-olds. Children showed higher levels of cognition in the task of drying than in the task of water level changes.

• 대한소아치과학회지
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• 제5권1호
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• pp.7-11
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• 1978

Of 633 children, 334 in male and 299 in female, whose ages ranged from 3 to 13 years old, the amounts of development of teeth germ were observed according to ages with oblique lateral cephalogram to study the developing state of teeth germ of mandibular premolars. The results were as followings; 1. The time of actively develop:ng tooth germ was observed about 10 years old both in male and in female. 2. The increasing rate of development of tooth germ a year was higher in female than in male at mandibular 1st premolar and in male than in female at mandibular 2nd premolar. 3. Age of complete tooth germ development was earlier in female than in male at mandibular 1st and 2nd premolars.