• Product Safety
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• s.187
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• pp.18-19
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• 2009

• Product Safety
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• s.206
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• pp.48-55
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• 2011

• Product Safety
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• s.208
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• pp.31-33
• /
• 2011

• Product Safety
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• s.207
• /
• pp.38-45
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• 2011

• Life and Agrochemicals
• /
• v.26 no.8 s.211
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• pp.42-45
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• 2005

농약 오해 많아, '전문지식 부족 · 무책임한 정보'로 안전성 판단해선 안돼 유기 · 무농약농법 '농약 우산' 속서 일부 가능, 경제적 · 안전방제법 세계유익

• 월간 기계설비
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• s.242
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• pp.51-53
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• 2010

중소기업중앙회 노란우산공제산업단에서는 지난 2007년부터 중소기업 소상공인 사업주를 대상으로 매월 일정부금을 납부하면 폐업, 사망, 질병(부상)으로 인한 퇴임, 노령 은퇴시 생활안정과 사업재기를 도모할 수 있도록 퇴직금(목돈)을 지급하는 공제사업을 시행하고 있다. 건설업의 경우 상시근로자 50인 미만 중소건설 사업주만 가입이 가능하며 세금 절세혜택(연 300만원 소득공제)과 납부한 공제금은 압류, 양도, 담보가 금지되어 있으므로 폐업시 최소한의 생활안전과 사업재기를 위한 자금확보가 가능하다.

• Journal of the Korean Society of Safety
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• v.21 no.1 s.73
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• pp.114-119
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• 2006

In this study, laminated composite umbrella type roofs structures such as stadium, exhibition, auditorium and museum are analyzed. These structures have not been dealt with so far because of the difficulty in modeling. These have been analyzed mostly by a simplified method or a grid analysis in design. In this study, better results can be obtained by using shell element. The behavior of umbrella type shell roof under self weight is analyzed for various parameters such as the influence of diaphragm, diaphragm type, ${\gamma}-angle$ type, height/chord ratio of segment, slope of roofs, number of conical segment and subtended angle.

• Journal of the Korean Society of Safety
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• v.22 no.3 s.81
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• pp.45-50
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• 2007

In this study, reinforcing effects of umbrella-type shell roofs structures such as stadium, exhibition, auditorium and museum are analyzed. Umbrella-type shell roofs treated in this study are practical shapes of conical shells. The objective of this study is to analyze reinforcing effects of umbrella-type shell roofs with stiffeners. Various locations of stiffeners, that is, edge ring A, B, center ring, junction stringer and center stringer are presented and the effects of reinforcement is examined. Also, the reduction effects of roofs thickness by stiffeners are examined. It is shown that the thickness of roofs can be reduced about $20{\sim}30%$ by junction stringer and more than 60% by edge ring A.

• The KIPS Transactions:PartC
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• v.14C no.4
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• pp.341-348
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• 2007

Even though the secret information stored in home device in home network must be handled very safely and carefully, we have no measure for protecting the secret information without additional hardware support. Since already many home devices without consideration of the security have been used, the security protection method for those devices have to be required. In this paper, we suggest two schemes that protect the security information using networking function without additional hardware support, and those hybrid method to supplement the defects of each scheme. We also consider the our proposals in the aspects of security and cost.

• Journal of Korean Society of Forest Science
• /
• v.98 no.4
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• pp.399-408
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• 2009

We investigated the improvement of immuno-modulatory activities of sap of Acer mono and A. okamotoanum encapsulated with edible polymers. Anticancer activities and immune activities such as human B and T cell growth, secretion of cytokines and natural killer cell growth were observed. Both human immune B and T cells were increased up to 30~50% by the addition of nano particle sap of Acer mono and A. okamotoanum. The secretion of Interleukin-6 (IL-6) and Tumor necrosis factor-a (TNF-a) from human immune B and T cells were also significantly increased compare to the control. Natural Killer (NK) cell growth was enhanced to $19.4{\times}10^5$ cells/mL in adding nano encapsulated sap of A.okamotoanum. The cytotoxicity of the sample on normal human lung cell (HEL299) was below 19.8% in adding 1.0 mg/mL of the nano particle sap of A. okamotoanum. Generally, the growth of all three human lung adenocarcinoma, human stomach adenocarcinoma and human liver adenocarcinama was inhibited up to 85% in adding 1.0 mg/mL of the encapsulated sap. Interestingly enough, the encapsulated sap was completely penetrated into human cancer cells within 30 min after addition. It showed that the encapsulation of the sap definitely increased its biological activities, which can expand its use to wide range of food industries.