• Journal of the Korean Orthopaedic Association
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• v.53 no.6
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• pp.552-557
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• 2018

Vitamin D plays a major role in bone metabolism, and its deficiency has an impact on fracture risk and healing. Low vitamin D levels are a cause of poor bone mineralization and have been associated with a significantly higher risk of physeal injury in children. This paper presents a case of a 13-year-old boy with a vitamin D deficiency, who sustained multiple sequential epiphyseal injuries at various areas. This report suggests that vitamin D deficiency is not only a significant cause of the clinical disease itself, but also an important factor affecting the successful recovery of injuries.

• Journal of the Korean Institute of Landscape Architecture
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• v.41 no.3
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• pp.31-42
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• 2013

This study was carried out to systematically maintain and manage the trails by assessing the types of deterioration and naturalness of trails located in Mt. Toham, Mt. Nam, Mt. Danseok and in the Mt. Gumi district of the Gyeongju National Park. The route length of Mt. Toham was 2.7km, 2.3km of Mt. Nam, 1.0km of Mt. Danseok and 2.7km of Mt. Gumi district. The numbers of measuring points in Mt. Toham were 37 units, 29 units of Mt. Nam, 16 units of Mt. Danseok and 40 units of Mt. Gumi district. In characteristics of physical environments, Mt. Danseok was the widest and Mt. Gumi was the narrowest in the width of trail. In the bared width of trail, Mt. Danseok was the widest and Mt. Gumi was the narrowest. In depth of erosion, Mt. Danseok was the deepest and Mt. Gumi was the shallowest. Mt. Danseok was the steepest and Mt. Nam was the gentlest in the longitudinal slope. In the results of analysing the types of deterioration, Mt. Toham were 10 types, 14 types of Mt. Nam, 11 types of Mt. Danseok and 9 types of Mt. Gumi district. The times of appearance of deterioration types in Mt. Toham were 69 times, 87 times of Mt. Nam, 67 times of Mt. Danseok and 71 times of Mt. Gumi district. The most common type was the exposure of root in 4 districts of Gyeongju National Park. In the results of assessing the naturalness, Mt. Toham was 2.1 score(II degree), 2.6 score(II degree) of Mt. Nam, 2.9 score(III degree) of Mt. Danseok and 2.0 score(II degree) of Mt. Gumi district. The average naturalness was 2.4 score and II degree.

• The Korean Journal of Zoology
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• v.37 no.2
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• pp.222-231
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• 1994

밤바구미 유충기의 whole body로부터 cyclic AMP(CAMP)를 추출하여 농도 변화를 측정하였고 cyclic AMP-dependent protein kinase(PKA)를 부분 정제하여 활성도 변화를 조사하여 CAMP 농도와 PKA 활성도와의 소장관계를 비교하였다 CAMP 농도와 PKA 활성도는 HPLC와 liquid scintillation counter를 이용하여 측정하였다 CAMP 농도는 밤바구미 유충에서 월동전에 0.57 UMlg로 가장 높았고, 월동중에 0. 14 UMIS로 감소하였다가 월동후에 0.29 UMlg로 증가하였다 또한 PKA 활성도는 월동전에 2.56unit/mg로 가장 높았으며, 월동중에 0.62 unit/mg로 감소하다가 월동후에 07 unit/mg로 다시 증가하여 CAMP 농도 변화와 유사한 경향을 나타내었다. 이는 월동전에 휴면에 대비하여 최대의 취식으로 지방체 축적이 가장 많았고, 월동중에는 지방체의 소비가 증대되.기 때문에 감소하였다가, 월동후 휴면 종결과 유충-번데기 탈피를 준비하기 위해 'CAMP 농도와 PKA 활성도는 다시 증가하였다.

• Proceedings of the Korea Information Processing Society Conference
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• 2023.11a
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• pp.728-730
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• 2023

산업폐기물 처리 및 관리는 제조 산업 관련한 공통된 이슈 중 하나이며, 폐기물의 적시 처리는 환경오염, 화재 등 사고 예방에 효과적이며, 특히 인체유해물질 발생 전 처리는 필수이다. 메타버스 공간內 공동 폐기물처리장을 마련함으로써 별도의 물리적/현실에서 공동 폐기물 처리장을 별도로 구축할 필요성이 없으며, 동일한 효과성을 발휘할 수 있는 콘텐츠 서비스로 제조 뿐 아니라 다양한 산업 내에서 활용성 역시 매우 높다. 이러한 산업폐기물 관리 서비스 3종을 구현하고 실증 방안을 제시하고자한다.

• Cement
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• s.89
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• pp.25-31
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• 1982

• Cement
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• s.10
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• pp.77-89
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• 1965

• Cement
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• s.81
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• pp.34-40
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• 1980

• Cement
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• s.82
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• pp.39-46
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• 1981

• Cement
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• s.84
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• pp.68-72
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• 1981

• Korean journal of applied entomology
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• v.47 no.1
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• pp.9-15
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• 2008

This study was conducted to investigate the seasonal occurrence of chestnut weevil, Curculio sikkimensis. The chestnuts infected by the weevils were collected from Gongju, Buyeo, and Cheongyang in Chungnam Province, Republic of Korea. Investigation was focus on the escape period of chestnut weevil larvae from the fruits, invading time and vertical distribution in soil, survival rates of larvae during overwintering, emergence period, emergence rate, and sex ratio and longevity of adults. For precocious species, larvae escaped the chestnut from the mid-September to the early-October, middle species and slow species, were escaped from the late-September to the mid-October and from the early-October to the mid-November. After escaping from the chestnut fruits all of the larvae burrowed into the soil within 35 minutes. Overwintering larvae inhabited in the range of $0{\sim}48cm$ from the soil surface and highly distributed in the range of $18{\sim}36cm$. The 74.1 % of wintering chamber were distributed within $18{\sim}36cm$ from the surface. Survival rates observed were 38.0% in 1st year, 16.0% in 2nd years, and 2% in 3rd years, respectively. Seasonal occurrence period of C. sikkimensis was from the early-Aug. to early-Oct. and the optimal occurrence period was the early and mid-Sept. Emergence rate decreased to 8.4% in 1st year, 3.6% in 2nd years, and 0.8% in 3rd years, respectively. Sex ratio was showed in the range of 0.51-0.55. It is female biased ratio. Longevity of adults was 9.9 days for female and 8.9 days for male.