• 한국정보디스플레이학회:학술대회논문집
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• 2002.08a
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• pp.268-269
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• 2002

Phtalocyanine derivative thin films were accumlated on ITO glasses by a Langmuir-Blodgett method. The layered structure and chromogenic properties of the films were investigated. We observed color changes which took place probably according to modulations of electronic distributions in the molecule. The novel chromogenic mechanism which can be applied to future FPD's was proposed.

• Proceedings of the Korean Information Science Society Conference
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• 1998.10c
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• pp.336-338
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• 1998

This paper presents a novel neural network structure to the blind deconvolution task where the input (source) to a system is not available and the source has any type of distribution including sparse distribution. We employ multiple sensors so that spatial information plays a important role. The resulting learning algorithm is linear so that it works for both sub-and super-Gaussian source. Moreover, we can successfully deconvolve the mixture of a sparse source, while most existing algorithms [5] have difficulties in this task. Computer simulations confirm the validity and high performance of the proposed algorithm.

• Proceedings of the Korean Society of Applied Pharmacology
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• 1993.04a
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• pp.39-39
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• 1993

To find out the novel anticancer agent for the treatment of solid tumors, 1-arylsulfonyl-2-alkoxy-4-arylimidazolines were designed and prepared from substituted styrenes through three steps. Compared to 5-fluorouracil, these analogues exhibit moderate cytotoxicity against human solid tumor cell lines, A-549(lung carcinoma) and SK-Mel-2(malignant melanoma). The structure-activity relationship indicates the high potential of this series for the development of novel antineoplastic agent.

• Bulletin of the Korean Chemical Society
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• v.23 no.6
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• pp.879-884
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• 2002

A series of novel 1,3-alternate calix[4]-mono-thiacrown and -bis-thiacrowns were synhesized within good yields. The three dimensional 1,3-alternate conformation was confimed by X-ray crystal structure. From the results of two phase extraction and NMR studies on the ligand-metal complex, one can conclude that the calix[4]thiacrown ethers showed the very high selectivity for silver ion over other metal ions by an electrostatic interaction between sulfur atom and silver ion and by a $\pi-metal$ complexation.

• YAKHAK HOEJI
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• v.39 no.3
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• pp.268-275
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• 1995

A novel polyacetylene was isolated from Cirsium spp., as well as five known ones, and its chemical structure was determined as heptadeca-1-en-11.13-diyne-8R, 9S, 10R-triol(1) on the basis of spectral data and chemical reactions. $^{1}$H-and $^{13}$C-NMR data of these polyacetylenes were completely assigned by the appfication of 2D-NMR techniques.

• 한국정보디스플레이학회:학술대회논문집
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• 2007.08a
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• pp.890-892
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• 2007

We report the syntheses and characterizations of a novel TTF derivative. To extend the mesogenic core, alkoxy naphthalenic group and short alkyl chains were introduced on either side of TTF unit, which results in asymmetric planar structure. TTF molecule is expected to show many interesting properties.

• Proceedings of the KIPE Conference
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• 2007.07a
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• pp.208-210
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• 2007

This paper proposes a novel direct instantaneous pressure control(DIPC) of hydraulic pump system with SR drive. And it has very simple control structure, because it doesn’t use any speed and torque control for adjusting pump pressure. The hysteresis band of pressure and proper switching rules can make the actual pump pressure to be constant with fast dynamic response. Therefore, the proposed DIPC method can control of hydraulic pump pressure steadily with fast dynamic response.

• Journal of Magnetics
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• v.10 no.3
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• pp.108-112
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• 2005

GaAs nanowires were grown on GaAs (111)B substrates in a gas source molecular beam epitaxy system, using self-assembled Au particles with diameters between 25 and 200 nm as the catalytic agents. The growth rate and structure of the nanowires were investigated for substrate temperatures between 500 and $600^{\circ}C$ to study the mass transport mechanisms that drive the growth of these crystals. The possibilities for fabrication of novel magnetic nanostructures by suitable choice of growth conditions are discussed.

• Proceedings of the PSK Conference
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• 2003.10b
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• pp.201.2-201.2
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• 2003

A novel lanostane-type triterpene, (24E)-3,4-seco-9${\beta}$H-lanosta- 4(28),7,24- triene- 3,26- dioic acid was isolated from Abies koreana (Pinaceae) which is a tall evergreen tree grown indigenously in southern Korea. The structure of this compound was characterized by spectroscopic methods. Cytotoxicity of the compound was evaluated in vitro using the SRB method, and it showed marginal activity against human cancer cell lines.

• Proceedings of the KIPE Conference
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• 2020.08a
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• pp.316-317
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• 2020

In this paper, a novel six-level inverter is proposed. Voltage regulation is applied at DC-link and flying capacitors through the implementation of phase-shifted carrier-based modulation with zero-sequence voltage injection. The performance of the proposed structure has been verified under various modulation indices, where low voltage ripple is achieved at each capacitor and total harmonic distortions (THD) of line voltage at unity modulation index is about 15.95%.