• Proceedings of the Korean Magnestics Society Conference
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• 2004.06a
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• pp.150-151
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• 2004

• Proceedings of the Korean Magnestics Society Conference
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• 2004.06a
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• pp.142-143
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• 2004

• Proceedings of the Korean Vacuum Society Conference
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• 2008.08a
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• pp.255-255
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• 2008

• Venture DIGEST
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• s.95
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• pp.44-47
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• 2006

서울에서 한 발짝 벗어나 시원한 시야와 맑은 공기를 느낄 수 있는 경기도 안양, 지하철 4호선 범계역에서 내려 '희망공원'을 따라 쭉 걷다 보면 니트젠의 새로운 보금자리를 만날 수 있다. 깔끔한 인테리어와 상큼한 향이 감도는 로비에서부터 조용한 듯 강한 니트젠의 내공을 느낄 수 있었다. 세계에 대한민국의 우수한 지문인식 기술을 알리고 있는 니트젠을 지금부터 공개한다.

• 주택과사람들
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• s.200
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• pp.60-65
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• 2007

한옥에 대한 추억은 누구에게나 있을 것이다. 겨울바람이 스며드는 한지 문과 모기가 많은 여름, 그리고 불편하기 짝이 없는 화장실...하지만 요즘 한옥은 현대적인 감각과 기술이 합쳐져 진화하고 있다. 한옥을 개조해 동사무소와 와인 바, 치과 등으로 사용하는가 하면, 아파트에 한옥식 인테리어를 도입하고 있다. 에디터가 직접 찾아 나선 한옥 리모델링 순례기.

• Proceedings of the Materials Research Society of Korea Conference
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• 2008.05a
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• pp.44.1-44.1
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• 2008

• Korean Chemical Engineering Research
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• v.49 no.3
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• pp.297-300
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• 2011

High energy proton irradiations were performed on graphene devices to increase the number of defects intentionally. Proton energy and fluence were 6 MeV and $5{\times}10^{15}\;cm^{-2}$, respectively. The defects in few layer graphene layer created by proton irradiations captured oxygen molecules that acted as p-type dopants. After the vacuum annealing, hole mobility was enhanced by the recovery of the defects and the desorption of the oxygen molecules. However, the drain current decreased after vacuum annealing due to the removal of the dopant molecules.

• Journal of the Korean Society for Precision Engineering
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• v.22 no.9 s.174
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• pp.41-48
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• 2005

In this study, to improve the formability of the rear floor in series stamping process, the method for predicting the temperature of tools and steel sheet is proposed using FE analysis. To do this, tensile tests and straight pulling friction tests of three steel sheets are carried out at temperatures up to $300^{\circ}C$, and the effect of temperature on the tensile properties and the characteristics of friction are examined. The steel sheets have a higher n-value in the temperature range of about $50^{\circ}C$, and it is related to the maximum uniform elongation. Also, the blue shortness occurs in the temperature range of about $150^{\circ}C$. When the temperature is higher than $200^{\circ}C$, the friction coefficient increase with increasing temperature. From the FE-simulation, the effects of the punch temperature considering heat expansion in the number of stamping are examined and discussed. The technique developed in this study fur estimating tool temperature can be used to develop more feasible ways to improve continuous productivity in series stamping process.

• Journal of Veterinary Clinics
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• v.27 no.2
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• pp.183-185
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• 2010

A 3-year-old Pit bull terrier dog had left hindlimb lameness for 3-weeks. On plain radiographs, geographic osteolysis with well-defined edges and marginal sclerosis was identified in medial aspect of left proximal tibialmetaphysis. Surgical debridement and curettage was performed. Coagulase negative Staphylococcus spp. grew on a culture specimen obtained during surgery, and Brodie's abscess was diagnosed.

• Transactions of the Korean Society of Mechanical Engineers A
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• v.28 no.1
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• pp.63-69
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• 2004

It is of great interest to enhance mixing performance in a microchannel in which the flow is usually characterized as a low Reynolds number (Re) so that good mixing is quite difficult to be achieved in this laminar flow regime. In this regard, we present a new chaotic passive micromixer, named Barrier Embedded Micromixer (BEM), of which the mixing mechanism is based on chaotic flows. In BEM, chaotic flow is induced by periodic perturbation of the velocity field due to periodically inserted barriers along the channel wall while a helical type of flow is obtained by slanted grooves on the bottom surface of the channel in the pressure driven flow. To experimentally compare the mixing performance, a T-microchannel and a microchannel with only slanted grooves were also fabricated. All microchannels were made of PDMS (Polydimethylsiloxane) from SU-8 masters that were fabricated by conventional photolithography. Mixing performance was experimentally characterized with respect to an average mixing intensity by means of color change of phenolphthalein as pH indicator. It was found that mixing efficiency decreases as Re increases for all three micromixers. Experimental results obviously indicate that BEM has better mixing performance than the other two. Chaotic mixing mechanism, suggested in this study, can be easily applied to integrated microfluidic systems , such as Micro-Total-Analysis-System, Lab-on-a-chip and so on.