• The Korean Journal of Ceramics
• /
• v.5 no.1
• /
• pp.25-29
• /
• 1999

Complex viscosities of dense alumina slurries over 45% volume density measured with the oscillating method were correlated well with Casson model. Among several monosaccharides and disaccharides studied here, fructose and sucrose showed good rheological properties in making dense alumina slurry plastic compared to other monosaccharides and disaccharides like glucose, galactose, arabinose, xylose and maltose. Sucrose content or additional water content in dense alumina slurry with sucrose contributed to the plasticity of the slurries.

• 연구논문집
• /
• s.28
• /
• pp.123-135
• /
• 1998

A shape function for element free Galerkin method is carved from Shepard interpolant of singular weight and consistency condition. Thus present shape function is an interpolation and has no singularities. The shape function is applied to cantilever bending problems and gives good results in comparison with beam theory. Finally it is shown that the coupling with finite element method is made easily without any additional treaties.

• The Journal of Korean Medicine
• /
• v.19 no.2
• /
• pp.411-419
• /
• 1998

For the purpose of external and internal morphological study on the origin of Folium, writing on herbolagy have been thoroughly reviewed. The object herb medicine(9 kinds) is Lophatheri Folium(Herba), Isatidis Folium, Eoriobotryae Folium, Mori Folium, Perillae Folium, Artemisiae argi Folium, Phyllostachys Folium, Clerodendri Folium, Biotae Folium(Cacumen). After this study, additional experimental verification is required as a matter of fact. As comparison materials, this thesis will be utilized.

• Journal of Information Display
• /
• v.8 no.3
• /
• pp.17-21
• /
• 2007

We introduce a new electrode structure for the patterned vertical alignment (PVA) mode, which has a lower color-shift at large viewing angle than the one-domain VA mode. By manipulating the period of electrode structure, we can make more multi-domains and use the existing fabrication processes without having to use additional materials.

• Journal of the Korean Professional Engineers Association
• /
• v.43 no.5
• /
• pp.31-34
• /
• 2010

To construct buildings methods and materials written on the book have been operated and managed with additional program as well as management techniques. However with 2D, a tool which has been used to design a plan, or simple 3D modeling weren't competent enough to plan, design and manage the buildings that are getting complex and higher To solve these problems BIM that enable steps(from planning, designing to maintenance management) to be used as a information is being used.

• Proceedings of the Korean Vacuum Society Conference
• /
• 2000.02a
• /
• pp.118-118
• /
• 2000

We investigate Frohlich-like electron--optical-phonon interactionsin uniaxial crytals based on the macroscopic dielectric continuum model. In general, the optical-phonon branches support mixed longitudinal and transverse modes due to the anisotropy. For heterostructures with double interfaces and superlattices, it is known that confined, interface, and half-space optical phonon modes exist in zincblende cystals. In uniaxial structures, additional propagating modes may exist in wurtzite heterosystems due to anisotropic phonon dispersion. This is especially the case when the dielectric properties of the adjacent heterostructure materials do not differ substantially. The dispersion relations and the interaction Hamiltonians for each of these modes are derived.

• Proceedings of the KIEE Conference
• /
• 1999.07d
• /
• pp.1861-1863
• /
• 1999

The polarization gratings were fabricated in chalcogenide $As_{40}Ge_{10}Se_{15}S_{35}$ thin film applicable to a medium of the polarization holography and their diffraction efficiencies$(\eta)$ were monitored by real-time measurement. The polarization gratings prepared consisted of the multi-layer thin film system. As a method to improve the $\eta$, we have investigated its change for the field effect. As the results, the value of $\eta$ strongly depended on the voltage applied to the film and the maximum value, $\eta_{max}$ was enhanced to be about 4 times in comparison with that of not biased sample. In addition, an increase in the $\eta$ can be estimated to be due to additional creation of new defects caused by the electric field across the film.

• The Research Journal of the Costume Culture
• /
• v.16 no.5
• /
• pp.924-936
• /
• 2008

The purpose of this thesis is to discuss corsets that represent an undergarment that later became a popular outerwear. It discusses its forms and distinct characteristics to help create a unique fashion design and its execution. The scope of this study is limited to works from the 1990s to the present, and the materials for the literatures and exploratory study are fashion-related portfolios and the domestic and foreign fashion magazines. The results of this study are summarized as follows: The standard look of corsets in modern fashion can be classified into styles of glamour, revival, and dismantle. The materials used vary from traditional fabrics such as satin or lace to newly developed materials such as metal or glass. Its presentation can also differ in that it may be used as an accessory with additional details, as an outerwear, as an extra decorative layer, or as a revealing innerwear by open outerwear. Characteristics of these various looks of corsets are; first, it redefines the revival of the traditional corsets through introduction of its historic elements and its compromise. Second, glamorous and feminine images are maximized through drastic and direct exposure by using tight lacing, a waist nipper or garter belts that emphasize a woman's curve. Third, it represents borderless dismantlement through experimental and irregular images using unconventional materials, new execution techniques, or alteration from the standard forms.

• Korean Journal of Materials Research
• /
• v.24 no.11
• /
• pp.578-584
• /
• 2014

To synthesize Sn nanoparticles (NPs) less than 30 nm in diameter, a modified polyol process was conducted at room temperature using a reducing agent, and the effects of different pH values of the initial solutions on the morphology and size of the synthesized Sn NPs were analyzed. tin(II) 2-ethylhexanoate, diethylene glycol, sodium borohydride, polyvinyl pyrrolidone (PVP), and sodium hydroxide were used as a precursor, reaction medium, reducing agent, capping agent, and pH adjusting agent, respectively. It was found by transmission electron microscopy that the morphology of the synthesized Sn NPs varied according to the pH of the initial solution. Moreover, while the size decreased to 11.32 nm with an increase up to 11.66 of the pH value, the size increased rapidly to 39.25 nm with an increase to 12.69. The pH increase up to 11.66 dominantly promoted generation of electrons and increased the amount of initial nucleation in the solution, finally inducing the reduced-size of the Sn particles. However, the additional increase of pH dominantly induced a decrease of PVP by neutralization, which resulted in acceleration of the agglomeration by collisions between particles.

• The Korean Journal of Ceramics
• /
• v.3 no.2
• /
• pp.73-81
• /
• 1997

In this paper, it is intended to present more reproducible and quantitative method for adhesion assemssement. In scratch test, micromechanical analysis on the stress state beneath the indenter was carried out considering the additional blister field. The interface adhesion was quantified as work of adhesion through Griffith energy approach on the basis of the analyzed stress state. The work of adhesion for DLC film/WC-Co substrate calculated through the proposed analysis shows the identical value regardless of distinctly different critical loads measured with the change of film thickness and scratching speed. On the other hand, uniaxial loading was imposed on DCL film/Al substrate, developing the transverse film cracks perpendicular to loading direction. Since this film cracking behavior depends on the relative magnitude of adhesion strength to film fracture strength, the quantification of adhesion strength was given a trial through the micromechanical analysis of adhesion-dependence of film cracking patterns. The interface shear strength can be quantified from the measurement of strain $\varepsilon$s and crack spacing $\lambda$ at the cessation of film cracking.