• Journal of International Society for Simulation Surgery
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• 제2권2호
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• pp.87-89
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• 2015

Closed reduction using acrylic splints with circummandibular fixation has been known to be useful techniques in pediatric mandibular fractures. However, this technique has some shortcomings, including needs for impression taking or additional laboratory process, which can increase the exposure time of general anesthesia or make an additional sedation visit. Recently, the advancement of computer-aided maxillofacial surgery offers to clinicians to expansion of its application. This case report represents a technique of computer-assisted virtual reconstruction and computer-aided designed splint fabrication in a 2-year-old boy with mandibular body fracture.

• 한국독성학회:학술대회논문집
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• 한국독성학회 2001년도 International Symposium on Dietary and Medicinal Antimutgens and Anticarcinogens
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• pp.154-155
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• 2001

Cyclooxygenase-2 (COX-2) is an inducible enzyme expressed in response to a variety of proinflammatory agents and cytokines. COX-2 expression has been shown to be elevated in several different types of human cancer. The presence of oncogenic ras has been associated with constitutive induction of COX-2 in certain H-ras transformed cells, and COX-2 overexpression confers resistance to apoptosis.(omitted)

• 천문학회지
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• 제11권1호
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• pp.55-58
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• 1978

An extensive molecular equilibrium calculation has been performed under sunspot conditions in order to resolve the current dispute on the presence of $C_2$ lines in the spectrum of sunspots. Equilibrium abundance of $C_2$ has been computed under the conditions of umbral cores, umbrae and the normal photosphere. As the results, it is found that the umbral cores yield unfavorable environment for $C_2$ formation. It is concluded that $C_2$ molecular lines are not likely tn be observed in the spectrum of sunspots.

• 대한약학회:학술대회논문집
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• 대한약학회 2002년도 Proceedings of the Convention of the Pharmaceutical Society of Korea Vol.2
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• pp.245.1-245.1
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• 2002

It has been known that resveratrol, a phytoalexin present in grapes mainly, has antioxidant. anti-inflammatory, and cancer chemopreventive activity. One mechanism of its anti-inflammation and cancer prevention is considered to modulate cyclooxygense-2 (COX-2) activity. Since COX-2 plays an important role in inflammation and carcinogenesis, the potential COX-2 inhibitors have been considered as anti-inflammatory or cancer chemopreventive agents. (omitted)

• 한국잠사곤충학회지
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• 제13권1호
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• pp.23-29
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• 1971

가잠난을 대상으로 하고 시료조건을 Part 1에서는 갑배자에서부터 최청시키면서 부화직전에 이르기까지 Ascorbic acid와 Lipids (triglyceride 와 cholesterol) 및 free fatty acid를 분석하고 Part 2에서는 시료의 일부를 병$_{B}$ 시기에 방사선 800${\gamma}$에서 40분간 조사시킨 후 표준구와 같은 조건에서 최청하면서 glucose와 phosphorus를 분석, 비교 검토하는 동시에 이상의 각종 내용물질의 변동을 생화학적으로 분석한 결과 다음과 같은 결론을 얻었다. 1. Ascorbic acid는 병$_{B}$ 배자에서 319.5${\gamma}$/g으로 가장 많았고 그 후부화전까지 감소해 감을 알 수 있었다. 2. Triglyceride는 병$_{A}$ 배자에서 27.54mg/g으로 난내세포가 활성화되는 시기에 가장 많았고 그 후 배자가 발육함에 따라 점차적으로 감소하였으며 Total Cholesterol이나 Free Cholesterol은 최청초기부터 부화직전까지 큰 변동이 없음을 확인하였다. 3. Free Fatty acid 는 Triglyceride가 가장 증가한 병$_{A}$ 에서 257.4$\mu$ mole/g으로 최소량을 나타냈고 반대로 감소되는 己A에서 1,020$\mu$ mole/g로 증가함을 알 수 있었고 전반적으로 보아 배자가 발육함에 따라 증가되는 결과를 얻었다. 4. Glucose는 표준구 점청기 281.2mg/g으로 가장 많은 증가를 보이고 방사선 조사구에서도 같은 시기 179.6mg/g으로 최고를 나타내어 동일한 경향을 보이나 양적으로 ${\gamma}$-Ray 처리구가 적다는 것과 Free Fatty acid 및 Phosphorus와의 상반된 변동을 알 수 있었다. 5. 표준구에서 Organic phosphorus는 병에서 5.23mg/g이었고 ${\gamma}$-Ray 처리구는 己A에서 5.73mg/g으로 가장 많은 양을 나타내고 Inorganic phosphorus에서는 약간의 변동이 있을 뿐이다. 방사선 처리구는 Organic phosphorus와 Inoranic phosphorus는 다 같이 최청초기에는 적으나 己A 이후는 급격히 증가하여 부화직전에 이르기까지 표준구보다 많았음을 알 수 있다. 이상과 같은 결과를 얻은 것은 금후 잠종의 취급 보존에 크게 밑 받침 될 것으로 생각된다.

• 대한기계학회논문집B
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• 제28권8호
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• pp.937-944
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• 2004

An experimental study has been conducted to evaluate the effects of $CO_2$ on heat transfer from oxygen-enriched hydrogen flame. Experiments were performed on flames stabilized by a co-flow swirl burner, which was mounted on top of the furnace. Five different oxidizer compositions were prepared by replacing $N_2$ with $CO_2$. In a steady state, the total as well as radiative heat flux from the flame to the wall of furnace have been measured using a heat flux meter. Temperature distribution in furnace also has been measured and compared. By increasing $CO_2$ proportion in the oxidizer, the convection played a more significant role rather than radiation. Overall temperature in the furnace was seen to be decreased, while the total heat flux has increased.

• 한국표면공학회:학술대회논문집
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• 한국표면공학회 2013년도 춘계학술대회 논문집
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• pp.170-170
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• 2013

We present a novel etching technique for 2-dimentional (2-D) hexagonal boron nitride (h-BN) by using capacitively coupled plasma (CCP) of oxygen combined with a post-treatment by de-ionized (DI) water. Oxygen CCP etching process for h-BN has been systematically studied. It is found that a passivation layer was generated to obstruct further etching while it can be easily and radically removed by DI water. An essential cleaning effect also has been observed in the etching process, organic residues are successfully removed and the surface roughness has much decreased. Considering h-BN is the most important 2-D dielectric material and its potential application for graphene to silicon-based electronic devices, such an etching method can be widely used to control the 2-D h-BN thickness and improve the surface quality.

• Current Optics and Photonics
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• 제2권1호
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• pp.34-38
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• 2018

An X-band microwave photonic (MWP) filter using switch-based fiber-optic delay lines has been proposed and experimentally demonstrated. It is composed of two electro-optic modulators (EOMs) and $2{\times}2$ optical MEMS-switch-based fiber-optic delay lines. By changing time-delay difference and coefficients of each wavelength signal by using fiber-optic delay lines and an electro-optic modulator, respectively, a bandpass filter or a notch filter can be implemented. For an X-band MWP filter with four channel elements, fiber-optic delay lines with the unit time-delay of 50 ps have been experimentally realized and the frequency responses corresponding to the time-delays has been measured. The measured frequency response error at center frequency and the time-delay difference error were 180 MHz at 10 GHz and 3.2 ps, respectively, when the fiber-optic delay line has the time-delay difference of 50 ps.

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 1998년도 하계종합학술대회논문집
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• pp.453-456
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• 1998

The electrical properties of $Si_{1-x}Ge_{x}$ samples have been investigated. The sample structures were grown by MBE (molecular geam epitaxy) with Ge mole-fraction of x=0.0, x=0.05, x=0.1, and x=0.2. To examine the influence of the thermal processing, the $O_{2}$ and N$_{2}$ process were performed at 800[.deg. C] and 900[.deg. C], respectively. After this thermal process, hall measurements have been done over a wide range of the ambient temperature between 320[.deg. K] and 10[.deg. K] to find the temperature dependence using the comparessed-He gas system. The Ge-rich layer has been formed at the $SiO_{2}$/SiGe interface and it has an effect on the hall mobility. And it has been found that hall mobility was increased by the $N_{2}$ annealing process comparing with dry oxidation process at both 800[.deg.C] and900[.deg. C].

• International Journal of Reliability and Applications
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• 제7권1호
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• pp.71-77
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• 2006

The market for second hand products has been growing for a variety of reasons (e.g., new products appearing at a faster rate and the expected life of products increasing due to rapid advances in technology). The demand for warranties for second-hand products has been growing along with the growth of the market for second-hand products. Warranty for new products (consumer durables, industrial and commercial, and specialized defense products) has received a lot of attention. In contrast, warranties for second-hand product have received very little attention. Often, dealers of second-hand product such as cars offer 2D-warranties (Year and Kilometers). The expected warranty cost associated with a second-hand product for 2D-Policies is a function of the age of the item and its usage (as it affects failures over the warranty period), the warranty terms and the servicing strategy used by the dealer. This paper deals with development of models for warranty cost analysis along with the decision on sale price and warranty cover for 2D-Warranty policies associated with sale of second-hand products.