• Proceedings of the KIEE Conference
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• 2001.07d
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• pp.2317-2319
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• 2001

This paper presents a sensor fusion algorithm for the RC helicopter which uses a complementary filter. To measure the attitude angle of the helicopter, 3rate gyroscopes and a 3-axis accelerometer are mounted on the helicopter. The signals from them are passed though a complementary filter to produce estimation outputs. Experiments show that designed system is effective for the attitude estimation.

• Medical Lasers
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• v.9 no.2
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• pp.190-193
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• 2020

A 45-year-old Korean male with laryngotracheal papilloma was treated using a 532-nm diode laser at six watts with a pulse width of 25 milliseconds. Two months after the laser treatment, the resected region was well-healed without significant scar contracture. This outcome suggests that a 532-nm diode laser can be a safe and effective treatment for laryngotracheal papilloma.

• Proceedings of the Korean Society of Crop Science Conference
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• 2022.10a
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• pp.249-249
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• 2022

• Proceedings of the Korea Concrete Institute Conference
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• 2004.05a
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• pp.766-769
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• 2004

This paper presents 3D nonlinear analysis considering the slip of composite section as well as the static load tests of PSC-Steel hybrid girders. According to the slip modulus, the nonlinear analysis shows that the behavior of hybrid girders could be divided into three parts as full-composite, partial-composite and non-composite. However, the experimental results show that the PSC-Steel hybrid girders with shear connectors take the part of partial composite action in ultimate load stage. In addition, the load test results give that stud shear connectors and welded reinforcements have contributed to improve the ultimate strength of hybrid girders for about $20\%$.

• Journal of the Korean Society for Railway
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• v.8 no.2
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• pp.195-201
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• 2005

Mode II interlaminar fracture behaviors of carbon fabric/epoxy composites, which are applicable to tilting train carbodies, was investigated by the ENF (End notched flexure) test. The specimens were made of CF3327 plain woven fabric with epoxy and a starter delamination at one end was made by inserting Teflon film with the thickness of 12.5$mu$m or 25.0$mu$m. The equation for mode II interlaminar fracture toughness was suggested based on the effective crack length from the compliance of load-displacement curve. Mode II interlaminar fracture toughness was evaluated for several types of the specimens. Also crack propagating behaviors and fracture surfaces were examined through an optical travelling scope and a scanning electron microscope.

• Proceedings of the Korea Concrete Institute Conference
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• 2006.11a
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• pp.293-296
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• 2006

The results and interpretations of push-out tests on shear connector devices for composite bridges carried out in this study are presented. The devices under investigations are headed studes, perfobond rib, ㄱtype perfobond rib, T- Connector and a new type of shear connector called T type perfobond rib. This new connector is flat steel plate with a number of holes punched through. The results obtained indicate that the T type perfobond rib shear connectors exhibit adequate ductility and substantially higher capacities. Therefore for composite beams utilizing reinforced concrete slabs, the T type perfobond rib shear connectors is a viable alternative to the headed studs.

• Archives of Pharmacal Research
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• v.21 no.6
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• pp.729-733
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• 1998

The crude extract of Streptomyces sp. strain KM86-9B, isolated from a marine sponge, displayed significant inhibition on topoisomerase I activity. Investigation of the ca usative components by bioactivity-directed fractionation resulted in the isolation of a series of iso- and anteiso-fatty acids.

• Proceedings of the Korean Society of Applied Pharmacology
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• 1994.04a
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• pp.168-168
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• 1994

G009는 단백다당체로서 분자량 0.5-200만 사이에 광범위하게 분포되어 있으며 구성당은 glucose를 주로하여 galactose, mannose 등으로 구성되었고, 아미노산은 glycine, leucine, alanine 이외 기타 아미노산으로 구성되어 있다. 담도결찰 쥐에서 G009투여군은 대조군에 비하여 간섬유화 유발물질로 추정되는 혈중 Procolagen type III peptide의 감소시켰고 간조직중 총 collagen의 양도 감소시켰다. 또한 조직학적 검사 결과로도 간섬유화의 억제가 뚜렷하였다. 각종 간손상 유발물질에 대하여도 G009투여군은 대조군에 대하여 정상군과 동일한 수준으로 GOT, GPT, triglyceride수치를 보였으며 간조직도 정상군에 가까운 결과를 보였다.

• Journal of Ocean Engineering and Technology
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• v.28 no.4
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• pp.268-273
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• 2014

To investigate the turbulence characteristics within the boundary layer over a flat plate, an experimental study was performed using a PIV technique in a circular water channel. For two water velocities, 0.92 and 1.99 m/s, the water velocity profiles were taken and analyzed to determine turbulent characteristics such as the Reynolds stress, Taylor micro-length scale, and Kolmogorov length scale within the defect law region of the boundary layer. These analysis methods may be applied to research on the friction drag reduction technology using micro-bubbles or an air sheet over the surface of a ship's hull, because the physical reason for the friction drag reduction could be found by understanding the variation of the turbulence characteristics and structures in the boundary layer.

• Annals of Clinical Neurophysiology
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• v.6 no.1
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• pp.39-42
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• 2004

A 20-year-old man with bilateral medial medullary infarction showed transition of bowtie and upbeat nystagmus into hemi-seesaw nystagmus. Follow-up MRI revealed near complete resolution of the right medullary lesion. This transition of nystagmus suggests that the upbeat nystagmus was generated by bilateral lesions in the ascending pathways from both anterior semicircular canals (SCC), and that the hemi-seesaw nystagmus was caused by damage to the pathway from the left anterior SCC.