• Proceedings of the Korean Magnestics Society Conference
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• 2009.12a
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• pp.74-75
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• 2009

First-principles calculations were carried out to investigate the crystal stability and magnetism of $Fe_{16}C_2$ and $Fe_{16}C_2$. Our precise calculations show that the structure of high carbon phase is $Fe_{16}C_2$ and this structure is more stable in the ferromagnetic state than the nonmagnetic state. The Fe atoms induced negative magnetic moment at the C atoms, which interact with the nearest Fe atoms.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.31 no.11C
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• pp.1023-1029
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• 2006

In this Paper, we present a novel authentication and key exchange(AKE) protocol for inter-NSP(provider) roaming in IEEE 802.16e networks. The proposed protocol allows performing both user and device authentication jointly by using two different authentication credentials and Provides user anonymity and session key establishment. Also, this protocol requires only two round number message exchange between foreign network and home network.

• ALGAE
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• v.17 no.3
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• pp.153-159
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• 2002

Partial 16S rRNA gene sequences of seven cyanophycean strains from the National Instiute of Environmental Research of Korea - Microcystis aeruginosa, M. aeruginosa f. aeruginosa, M. ichthyoblade, M. viridis, Anabaena flos-aquae, and Oscillatoria sancta - were analyzed and the phylogenetic relationship of Microcystis among Cyanophyceae were evaluated. Based on sequence analysis results, Microcystis is monophyletic, the clade of which supported 100% bootstrap tress, and distinguished clearly from the other taxa. Therefore, the partial 16S rRNA gene sequences can be a useful and efficient tool for distinguishing Microcystis from other cyanophycean without axenic culture or cloning.

• Proceedings of the SAREK Conference
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• 2009.06a
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• pp.21-26
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• 2009

TRNSYS 16 had just a wall area and azimuth as an input value about a building shape. So, a geometrical shape of a building was not considered in simulation using TRNSYS 16. In this study, we suggested the more appropriate modeling method for simulation considering of building geometry in TRNSYS 16. To suggest this method, we simulated energy needs affected by shading effect that caused by a geometrical shape of a building, and compared the result to the simulation result of non-shading environment.

• Natural Product Sciences
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• v.3 no.1
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• pp.14-18
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• 1997

Two new diterpenoids, orientalin A (1), and B (2), have been isolated together with six known compounds, kirenol (3), $ent-16{\beta},17-dihydroxykauran-19-oic$ acid (4), $ent-16{\beta},17-dihydroxykauran-19-oic$ $acid-16{\beta},l7-acetonide$ (5), $3,7-dimethylquercetin$ (6), ${\beta}-sitosterol$ (7), and daucosterol (8) from the ethanol extract of Siegesbeckia orientalis (Compositae). Their chemical structures have been elucidated as $ent-15-acetoxy-2{\alpha},16,19-trihydroxypimar-8(14)-ene$ (1), $ent-16-acetoxy-2{\alpha},15,19-trihydroxypimar-8(14)-ene$ (2), respectively, on the basis of chemical and spectral evidence.

• Journal of the Korean Institute of Telematics and Electronics C
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• v.35C no.8
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• pp.33-41
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• 1998

We have designed a high speed and low power 16bit-ELM adder with variable-sized cells uitlizing the fact that the logic depth of lower bit position is less than that of the higher bit position int he conventional ELM architecture. As a result of HSPICE simulation with 0.8.mu.m single-poly double-metal LG CMOS process parameter, out 16bit-ELM adder with variable-sized cells shows the reduction of power-delay-product, which is less than that of the conventional 16bit-ELM adder with reference-sized cells by 19.3%. We optimized the desin with various logic styles including static CMOs, pass-transistor logic and Wang's XOR/XNOR gate. Maximum delay path of an ELM adder depends on the implementation method of S cells and their logic style.

• Proceedings of the KSMRM Conference
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• 2003.10a
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• pp.23-23
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• 2003

To evaluate clinical visualization of intracranial aneurysms between 3D-TOF MRA with 3.0T MR and CTA with 16-slices MDCT. In a prospective series, 12 patients with 16 aneurysms were studies with 3D-TOF MRA and CTA. MRA were performed on a GE Signa 3.0 T system (Signa VH/i, GE) with 25/3/20 (TR/TE/FA). CTA were peformed on a 16 slice MDCT (Sensation 16, Somatom, Siemens) with IV shooting of 80 ml iodinated contrast mediumat antecubital vein at a rate of 3.5 ml/sec. Four among 12 patients underwent DSA for surgery. Size, shape, neck and parent vessel of aneurysms were evaluated for comparison of visualization and detectability of aneurysms.

• Korean Journal of Microbiology
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• v.46 no.4
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• pp.405-408
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• 2010

Diversity of myxobacteria in five soil samples from Asansi and Uponeup in Korea was explored by means of polymerase chain reaction (PCR) using primers that specifically bind 16S rDNA of myxobacteria. DNA sequence analysis of 76 PCR fragments containing myxobacterial 16S rDNA revealed five putative novel myxobacterial genera whose 16S rDNA sequences shared <95% sequence identity with those of the type strains. This finding indicates the presence of many uncultured and unidentified myxobacterial species in Korean soil.

• Proceedings of the KIPE Conference
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• 2002.07a
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• pp.415-418
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• 2002

In the paper, a four-phase 16/12 structure Switched Reluctance motor drive is presented. The construction of the stator and the rotor in the motor, the scheme of the rotor position detector and the main circuit of the power converter are described. The comparison of the four-phase 16/12 motor and the four-phase 816 motor and the comparison of the four-phase 16/12 motor and the three-phase 12/8 motor are made. In the controller, the PWM control variable-speed control, the commutation control, the four quadrants control, the overvoltage protection, the overcurrent protection and the under voltage protection could be achieved. Tested results of the developed prototype are made.

• Journal of Microbiology and Biotechnology
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• v.18 no.12
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• pp.1908-1914
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• 2008

An alkaliphilic bacterium, Bacillus clausii SKAL-16, was isolated from soil that had been contaminated with vegetable oil. The optimal pH and general pH range for bacterial growth was 8, and 7 to 10, respectively. The bacterium could grow on tributyrin and glycerol, but could not grow on acetate and butyrate. The SKAL-16 strain excreted butyric acid during growth on tributyrin, and selectively ingested glycerol during growth on a mixture of butyric acid and glycerol. The SKAL-16 generated intracellular lipase, but did not produce esterase and extracellular lipase. The DNA fragment amplified with the chromosomal DNA of SKAL-16 and primers designed on the basis of the esterase-coding gene of Bacillus clausii KSM-KI6 was not identical with the esterase-coding gene contained in the GenBank database. Pyruvate dehydrogenase, isocitrate dehydrogenase, and malate dehydrogenase activities were detected in the cell-free extract (crude enzyme).