• Korean journal of applied entomology
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• v.19 no.4 s.45
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• pp.187-192
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• 1980

This study was carried out to investigate the bionomics of Ostrinia furnacalis $(Gu\grave{e}n\grave{e}e)$ in the laboratory and field in 1978. The oriental corn borer had three generations a year in Korea ana the first period of moth activity was mostly from early June to early July, the second from mid July to mid August and the third from mid August to early September. It overwintered with larval stage in the corn stubbles. The egg period was 3-4 days. The larva molted 5-6 times and its period was 18-30 days. The longevity of adult was 7-11 days and deposited about 600-800 eggs. An egg parasite and two larval parasites were investigated.

• Korean Journal of Heritage: History & Science
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• v.40
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• pp.137-167
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• 2007

This paper is aimed to study the late Neolithic Age in North Korea in order to closely examine a transition process into the Bronze Age in the Korean peninsula. Thus, the pottery with lightning design was selected as target data. Since the pottery with lightning design is fundamental data that North Korea's archeologists have used for chronological recordings of the late Neolithic Age in the northwest region, the parallel relationship between the eastern and the western region was established with comparison of pottery with lightning design in the northeastern region. The examination focuses on data that cover the target region of the pottery with lightning design of the adjacent Southern Primorskii region including the counterpart of the northwestern and the northeastern region. As a result, some attribute analyses revealed that the pottery with lightning design was affected by the counterpart of the northwestern region near the Yalu River. Prior to genealogical and chronological recordings of the pottery with lightning design in the northeastern region, the pottery with lightning design in the northwestern region was recorded chronologically in order to examine its specific development process. Consequently, in the second period of the Neolithic Age, the pottery with lightning design in the northwestern region was assumed to have an impact on the counterpart in the northeastern region. The classification of the pottery with lightning design in the northeastern region shall be based on 4-period development. According to this classification, the pottery, which was found in the Tumen river basin, was thought to belong to the first period. The pottery went through genealogy differentiation in the second period and when entering into the third period, the pottery spread to inland of south Primorskii. The pottery was assumed to exist in the southern Primorskii region until the tip end (the fourth period) of the Neolithic Age. It is assumed that considering the fact that climate change led to the agriculture movement, Zaisanovka culture, i.e. the late Ne Neolithic Age, moved to the southern Primorskii region along the Tumen River basin.

• International Journal of Industrial Entomology and Biomaterials
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• v.47 no.1
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• pp.44-50
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• 2023

The Daehwangjam has excellent marketability and quality. However, precise silkworm breeding data on the recent high-temperature environment is not enough collected, and it is necessary to check whether stable Daewhangjam silkworm egg production was possible in poor environments. In this study, the timing of metamorphosis of the Daewhangjam parents Jam323 and Jam324 silkworms, in an optimal condition and a general condition similar to breeding grounds, was investigated to confirm that appropriate mating was achieved. Surprisingly, a number of female moths were discarded due to the metamorphosis of Jam324 female moths much earlier than Jam323 male moths in either an optimal or a general condition. To improve this, during the Jam324 female pupation period, the mild low-temperature of 15℃ was treated for the pupation period to delay the metamorphosis into female moths. Depending on the treatment period, the metamorphosis of the female pupa was delayed by more than 4 days, allowing normal mating with the Jam323 male moth. The eye pigments in a pupa also slowly accumulated in these treatments. In order to discover the side effects of low-temperature treatments, the voltinism of the Daewhangjam eggs was investigated, but most of them remained univoltine. Taken together, the low-temperature treatment during the female pupation period made it possible to use Jam324 female moths that were should be discarded, which means that stable and efficient management of Daewhangjam egg production is possible.

• The Journal of the Convergence on Culture Technology
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• v.3 no.4
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• pp.67-76
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• 2017

The Gaya Period is the period in which the nations of Gaya had existed in the Gimhae area. The term 'The Period of the Three Nations', which is widely used, is inappropriate because in ancient Korea, Gaya also existed besides Goguryeo, Baekje and Silla. This term should be corrected for the accurate reconstruction of the history of ancient Korea. Of course, the term 'The Gaya Period' cannot replace 'The Period of the Three Nations'. It just means the period in which the nations of Gaya existed. The Gaya Period refers to the period of about 600 years from about the first century, in which several nations of Gaya began to appear in the Gyeongsangnamdo area, through the falls of Daegarak of Kimhae in 532 A.D. and Daegaya of Goryeong in 562. When doing this, there should be no distortion of the original form of the relics. With the application of traditional techniques and excellent relics, it is believed that it helps to create the high added values by putting culture and tourism together with the development of various designs of cultural goods. To suggest possibility of jewelry designs by completing protype from idea scatch.

• The Journal of the Convergence on Culture Technology
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• v.6 no.4
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• pp.103-113
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• 2020

The Gaya Period is the period in which the nations of Gaya had existed in the Gimhae area. The term 'The Period of the Three Nations', which is widely used, is inappropriate because in ancient Korea, Gaya also existed besides Goguryeo, Baekje and Silla. This term should be corrected for the accurate reconstruction of the history of ancient Korea. Of course, the term 'The Gaya Period' cannot replace 'The Period of the Three Nations'. It just means the period in which the nations of Gaya existed. The Gaya Period refers to the period of about 600 years from about the first century, in which several nations of Gaya began to appear in the Gyeongsangnamdo area, through the falls of Daegarak of Kimhae in 532 A.D. and Daegaya of Goryeong in 562. When doing this, there should be no distortion of the original form of the relics. With the application of traditional techniques and excellent relics, it is believed that it helps to create the high added values by putting culture and tourism together with the development of various designs of cultural goods. To suggest possibility of scarf designs by completing protype from idea scatch.

• Korean Journal of Child Studies
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• v.31 no.4
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• pp.49-60
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• 2010

This study sought to investigate and assess the development patterns of children, aged from 3 to 5, by means of a longitudinal approach. The children's developmental patterns are classified according to five curriculum areas; physical health, social skills, expression, language, and exploration-. The developmental patterns are analyzed in detail according to the observation period, children's ages, and their genders. The subjects consisted of 108 children in A city. A research assistant was asked to observe and keep records of the children's behaviors at three distinct times -early, middle, and late in the school year. The 'observational scale for children' was used as the measurement tool. The data which was thus collected was then subject to statistical analysis. The major findings of the study are as follows. First, there were significant differences in all five curriculum areas according to the children's age and observation period. That is, five-year-old children showed higher scores than three- and four-year-old children. Second, there were significant differences in the social development within five curriculum areas according to the children's gender and the observation period. That is, girls exhibited higher scores than boys.

• Journal of Fashion Business
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• v.17 no.4
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• pp.75-89
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• 2013

In 2000s, the interest of ROHAS has been increased and the environmental problem has begun to be discussed as the environmental and global value, not the individual perspective. And the standard of value for eco-friendly awareness has been expanded to the economic category. The trend of eco-friendly fabric can be divided into 3 periods depending on the property. The period for natural fabric with visual effects(2002~2004) can be summarized as the creation of natural shape using the natural image, the interaction of cotton and the technology from the visual perspective. In the period of functional conjunction with eco-friendliness and technology(2005~2008), the eco-friendly awareness through the conjunction of technology and nature and the re-cycling, and the responsibility to the environment had been increased. In the period of sustainable development for nature and environment(2009~2011), it showed the conjunction with nature and the integration with technology and eco-friendly issues. Therefore, the characteristic of eco-friendly trend in fabric since 2000 can be said; firstly, the high-quality fabric has been developed with technological development for the functional progress. Secondly, the ethical creativity has been displayed with the development and utilization of eco-friendly recycling materials. Thirdly, the materials reflected with eco-friendly issues have emerged.

• Development and Reproduction
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• v.25 no.4
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• pp.299-303
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• 2021

The ascidian Halocynthia aurantium (sea peach), a marine invertebrate, belongs to the same genus of the phylum Chordata along with the ascidian Halocynthia roretzi (sea pineapple), which is one of the model animals in the field of developmental biology. The characteristics of development and reproduction of H. aurantium are not yet known in detail. In order to find out the spawning period of H. aurantium, we investigated development of the gonads during the annual reproductive cycle. Testis and ovary were both in the bisexual gonads (ovotestes) of H. aurantium, which is a hermaphrodite like H. roretzi. In H. aurantium, the right gonad was longer and slightly larger than the left gonad throughout the year. In each gonad, the number of the testis gonoducts was slightly higher than that of the ovary gonoducts. These features were similarly observed in H. roretzi. However, the number of the testis gonoducts and the ovary gonoducts in each gonad of H. aurantium was about half that of H. roretzi. The gonads of H. aurantium contracted during the winter and summer seasons. The gonads decreased to the smallest size around February, and then started to increase again in March. The gonads were most developed in September of the year. Therefore, it is estimated that the spawning of H. aurantium begins around this period.

• Korean Journal of Medicinal Crop Science
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• v.27 no.3
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• pp.173-185
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• 2019

Background: Galgeun-tang used in traditional Korean medicine, is a mixture of the medicinal plants Cinnamomi Ramulus, Ephedrae Herba and Puerariae Radix, and has been prescribed for the treatment of various ailments, including fever. Although the use of traditional medicinal herbs to treat diseases has recently increased, their safety and toxicity profiles incompletely elucidated. Thus, we evaluated Galgeun-tang's toxicity in male and female Sprague-Dawley rats. Methods and Results: Galgeun-tang (1,000, 2,000 and 4,000 mg/kg) was orally administered to rats for 13 weeks, and then, they were maintained for 4 weeks without administration (recovery period). Their clinical signs, and hematological and urinary properties, were monitored. The results showed that Galgeun-tang administeration slightly increased serum creatinine, urea nitrogen and, aspartate aminotransferase levels. Additionally, 2,000 and 4,000 mg/kg Galgeun-tang significantly increased urinary bilirubn and protein levels of male and female rats, which were restored during the recovery period. Conclusions: The no-observed-adverse-effect level of orally administered Galgeun-tang was 4,000 mg/kg in both female and male rats, and no target organs were identified. In addition, 400 mg/kg was found to be the no-observed-effect level for toxicity under the study conditions.

• Journal of The Korean Institute of Defense Technology
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• v.5 no.1
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• pp.1-6
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• 2023

The number of test samples was calculated by setting the reliability growth management test period considering the weapon system development period. The optimal reliability growth management test design condition was 80% reliability, 60% confidence level, and 6 months of test period. At this time, it was analyzed that 4 test samples were required if 0 failure occurred, and 9 test samples were required if 1 failure occurred. Using the method of determining the number of samples presented in this paper, it can be used as a basis for acquiring a budget for the number of samples for reliability growth management when switching from the exploratory development stage to the system development stage.