• 한국수학교육학회지시리즈A:수학교육
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• 제34권1호
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• pp.17-63
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• 1995

The exploration of Mathematics-learningmodel on the basis of Cognitive development The purpose of this paper is to sequenctialize Mathematics-learning contents, and to explore teaching-learning model for mathematics, with on the basis of the theory of cognitive development and the period of condservation formation for children. The Specific topics are as follows: (1) Systemizing those theories of cognitive development which are related to Mathematics - learning for children. (2) Organizing a sequence of Mathematics - learning, on the basis of experimental research for the period of conservation formation for children. (3) Comparing the effects of 4 types of teaching - learning model, on the basis of inference activity and operational learning principle. $\circled1$ Induction-operation(IO) $\circled2$ Induction-explanation(IE) $\circled3$ Deduction-operation(DO) $\circled4$ Deduction-explanation(DE) The results of the subjects are as follows: (1) Cognitive development theory and Mathe-matics education. $\circled1$ Congnitive development can be achieved by constant space and Mathematics know-ledge is obtained by the interaction of experience and reason. $\circled2$ The stages of congnitive development for children form a hierarchical system, its function has a continuity and acts orderly. Therefore we need to apply cognitive development for children to teach mathematics systematically and orderly. (2) Sequence of mathematical concepts. $\circled1$ The learning effect of mathematical concepts occurs when this coincides with the period of conservation formation for children. $\circled2$ Mathematics Curriculum of Elementary Schools in Korea matches with the experimental research about the period of Piaget's conservation formation. (3) Exploration of a teaching-learning model for mathematics. $\circled1$ Mathematics learning is to be centered on learning by experience such as observation, operation, experiment and actual measurement. $\circled2$ Mathematical learning has better results in from inductional inference rather than deductional inference, and from operational inference rather than explanatory inference.

• 시큐리티연구
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• 제14호
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• pp.21-41
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• 2007

이 연구는 지난 10년간의 한국경호경비학회보에 게재된 총 192편의 논문을 실증적으로 분석하여 경호 경비학 분야의 연구경향을 살펴보았다. 이를 토대로 경호 경비학 연구 분야에 대한 연구동향의 성찰과 시사점을 제시하고자 한다. 분석기준은 크게 시기별, 주제별, 연구방법별의 연구동향 세 가지로 분류하였다. 첫째, 시기별 분류의 연구동향은 태동기, 형성기, 발전기로 분류하였다. 그 결과, 총 192편의 논문 중 태동기 45%, 형성기 42%, 발전기 13%의 순으로 나타났고 경호 경비학 분야의 논문은 형성기 52%, 태동기 37%, 발전기 11%의 순으로 나타났다. 또한, 경호 경비학 분야의 논문은 총 게재수의 비해 절반도 미치지 못한 것으로 나타났다. 둘째, 주제별 분류의 연구동향은 대주제별과 중주제별로 분류하였다. 그 결과, 태동기, 형성기, 발전기 모두 기타 연구에 가장 높은 수치로 나타나고 있어 기타 연구 중심으로 편중되고 있는 것으로 나타나고 있고 대주제별을 시기별로 구분하면 태동기 46%, 형성기 43%로 비슷한 양상을 보이고 있다. 마지막으로 연구방법별 동향을 살펴보면 양적 연구 23%에 반해 질적 연구가 77%의 비중을 차지하고 있어 전반적으로 질적 연구에 의존하는 경향을 보이고 있다.

• 인간식물환경학회지
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• 제22권6호
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• pp.583-591
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• 2019

This study was conducted to examine the effects of wet storage solution, transport period and temperature on vase life and quality of cut flowers in standard chrysanthemum 'Jinba'. Immediately after transport, the fresh weight and flower diameter of cut flowers did not show a difference according to wet storage solutions regardless of the transport period, but as the transport period increased, the fresh weight and flower diameter increased. The flower bud stage at harvest was maintained due to the small changes in flower diameter, and the freshness of leaves was better when transported at 5℃ than at 25℃. When transported at 25℃, the longer the transport period, the lower the quality of cut flowers as some petals opened up and showed early flowering after transport. In preservative solutions, quality of cut flowers transported at 25℃ was lower than that at 5℃ due to fresh weight and diameter according to the longer transport period. The vase life of cut flowers was 1.0 day, 0.8 day, and 7.3 days longer when transported for 3, 5, and 7 days respectively at 5℃ than at 25℃. The quality of cut flowers was better due to increase in fresh weight and flower diameter, as well as vase life in wet storage solutions of ClO₂ and Chrysal OVB than in tap water, regardless of transport period and temperature. There was no difference in fresh weight and vase life between ClO₂ and Chrysal OVB, but flower diameter was greater in ClO₂ than in Chrysal OVB. Therefore, for long-term transport of cut standard chrysanthemum 'Jinba', wet storage transport in ClO₂ at 5℃ was found effective in maintaining the quality and vase life of cut flowers.

• 동아시아식생활학회지
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• 제25권5호
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• pp.850-859
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• 2015

For development of food of Jong-ga (Jeonju Hakindang) and its commercialization, this study investigated physico-chemical properties and quality characteristics of Mannaji (boiled beef down in Korean soy sauce) prepared with conventional or pre-heating methods during storage period (0, 4, 8, 12, 16, and 20 weeks) at $4^{\circ}C$. As storage period passed, pH decreased in both conventional and pre-heating methods. Forchromaticity, brightness ($L^*$) significantly decreasedwhile redness ($a^*$) and yellowness ($b^*$) significantly increased during storage period. After 4 weeks of storage, hardness of Mannaji with conventional methods was higher compared to before storage. Thiobarbituric acid reactive substances (TBARS) of both conventional and pre-heating methods increased above 1.2 MDA mg/km, which is the acceptable criteria for intake. Although volatile basic nitrogen (VBN) values slightly increased in 4 weeks of storage, there were no significant differences in VBN and maintained food acceptable level until 20 weeks of storage. Sensory panelists showed preference for Mannaji with pre-heating methods compared to conventional methods.

• 대한지리학회지
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• 제45권6호
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• pp.766-787
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• 2010

본 연구는 비교적 개항의 역사가 짧은 평택 당진항의 항만 발달과정과 화물유동의 항세권 변화를 밝히는 것을 목적으로 그 분석결과는 다음과 같다. 평택 당진항의 항만발달과 배후 지향지 변화와의 관계를 보면, 개발기에서 성장기로 나아가면서 배후 지향지의 지역적 범위는 크게 변함이 없으나 1차 배후 지향지의 화물 집중률은 낮아지고 주변지역에서의 비중이 증가하는 것은 자동차와 연료 에너지의 수출입화물 구성비가 낮아진 반면 수입하는 철강, 기타 섬유제품 넝마, 유기화합물, 수출하는 1차 금속산업 제품의 점유율이 증가하였기 때문이다. 이는 개발기에 중국과 미국으로의 수출, 성장기에 중국으로부터의 수입 증가와 연료와 에너지의 수입국 다변화가 이와 같은 항세권 변화를 나타내게 하였다.

• 한국발생생물학회지:발생과생식
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• 제27권3호
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• pp.101-115
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• 2023

Environmental factors impact oyster growth, condition, and gonadal development, which is linked to gamete characteristics observed through histology. The reproductive cycle of bivalves is related to energy storage and utilization. Therefore, in this study, the year-round growth change and gonadal development of oysters were observed using histological analysis, and the biochemical composition changes were confirmed. The oysters used in this study are being nurtured in Gadeok-do, and 40 oysters were randomly sampled monthly from March 2021 to February 2022. Result of histological analysis of gonads, oysters were showed early development from December to February, late development from March and April, mature and ripe from May to July, spawned from August to October, and spent from November to December. Condition index values of oysters decreased in summer and autumn and increased again when entered the spent after spawning. The protein content of oysters was high in May, the maturity period, and the lipid content decreased during the spawning period. In addition, EPA and DHA, the major fatty acids of oysters, were low during the spawning period and high during the maturation period. As a result, this study suggested a close relationship between changes in oyster growth, biochemical composition, and the reproductive cycle.

• Mycobiology
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• 제38권3호
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• pp.180-183
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• 2010

This study was conducted out to select a silkworm variety suitable for synnemata production of Isaria tenuipes. Four kinds of the mulberry silkworm varieties, Bombyx mori, were hybridized using a Japanese parental line and a Chinese parental line, and used to test for synemata formation in I. tenuipes. The larval period of normal silkworms was 22 hr longer than the silkworms inoculated with this fungus. Among the silkworm varieties tested, Hachojam had the shortest larval period with 23.02 days. The non-cocooning silkworm had a shorter larval period than the cocoon producing silkworms. The pupation rate of normal silkworms was about 9% higher than that of silkworms sprayed with I. tenuipes. Hachojam had the highest infection rate at 99.8%, but no significant difference was observed for the infection rate by silkworm variety. The production of synnemata was the best in JS171 $\times$ CS188 with an incidence rate of 99.3%, followed by Hachojam, and Chugangjam. The synnemata produced from Hachojam were the heaviest and showed white or milky-white in color.

• 대한원격탐사학회:학술대회논문집
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• 대한원격탐사학회 2003년도 Proceedings of ACRS 2003 ISRS
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• pp.1000-1001
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• 2003

Like other major cities in the world, Bangkok and some other cities in Thailand are expanding rapidly. The Office of Transports and Traffic Policy and Planning had selected three cities for a study of urban change; namely, Bangkok Metropolis and vicinity ( including Nontha buri, Samut Prakan , Prathum Thani, Samut Sakhon and Nakhon Pathom), Chiang Mai and Nakhon Nayok. The main objective of the study is to monitor urban development and urban extension as well as the change of landuse from farm land to urban area during two periods by using available satellite data. LANDSAT-5 TM and SPOT-HRV panchromatic were used for the first period and LANDSAT-7 ETM+ and IRS-lD panchromatic were used for the second period with a lapsed time of 14 years. I was found that during this period Bangkok Metropolis and vicinity extended 1,222 square kilometer; Chiang Mai 68.3 square kilometer, Nakhon Nayok 5.97 square kilometer. Most landuse categories which had been changed to urban were rice paddy and mixed orchard. Some suggestion for sound urban development based on satellite data was also included.

• The Journal of Asian Finance, Economics and Business
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• 제8권1호
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• pp.217-224
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• 2021

This research seeks to determine what intellectual capital represented by indicators of conceptual skills, human skills, and technical skills plays a role in the development of financial technology. The consideration of fintech is more practical and economical. The concept of fintech is related to the rapid development of global technology by creating various new technologies, especially computer technology. This research uses secondary data; the population of this study is the top management companies in Indonesia during the new normal era. The sample in this research used a purposive sampling method, and the quantitative method. The results of this research indicate that the intellectual capital variable represented by conceptual skills has a significant positive role in the development of financial technology in the new normal era. This research posits that intellectual capital also has a role in the development of financial technology in the new normal. This is because the new normal period represents currently a new challenge in responding to the economic crisis that is resulting from Covid-19 pandemic around the world. Therefore, new concepts, new humanity, and new techniques are needed to develop financial technology, so that they can exist and encourage economic growth in this Covid-19 pandemic era.

• 한국가구학회지
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• 제24권2호
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• pp.156-182
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• 2013

In this paper, the origin, development and features of a Korean folding stool are studied. A folding stool is a piece of collapsible seating furniture with its legs crossed in the form of the letter "X" and no back attached. In China, the folding stool was introduced from the West around the second century A.D. The folding stool of Korea was influenced by that of China. It is known from the records that the king used the folding stool from the Three Kingdom period. During the Koryo period, Chosun period and the modern period, the folding stool was used to show the authority of the king and nobleman. The folding stool was also used at outside places such as a hunting ground, a ceremonial walk, a battlefield, a garden etc. due to its portableness. Buddha worship policy of Koryo period supported the usage of the folding stool for shanding (禪定) by ascetics of Buddhist temple, or aristocrats. In a contemporary period, the folding stool is continuously produced and used as one kind of a folding chair due to its functionality, movability, storability and efficient space utilization. This research will serve as a momentum to investigate the origin and development of the East Asian seating furniture culture, and contribute to the further study and manufacturing of Korean seating furniture.