• 한국진공학회:학술대회논문집
• /
• 한국진공학회 2012년도 제43회 하계 정기 학술대회 초록집
• /
• pp.126-126
• /
• 2012

In past decades, the themal inkjet (TIJ) printer has been widely used as one of the most well-known digital printing technology due to its low cost, and high printing quality. Since the printing speed of TIJ printers are much slower than that of laser printers, however, there has been intensive efforts to raise the printing speed of TIJ printers. One of the most plausible methods to raise the printing speed of TIJ printers is to adopt a page-wide array TIJ printhead. To accomplish this goal, the high efficiency inkjet heating resistor films should be developed to settle the high power consumption problem of a page-wide array TIJ printhead. In this study, we investigated noble metal based multicomponent thin film resistor films prepared by atomic layer deposition (ALD) for a high efficiency inkjet printhead. Design concept, preparation, material properties of noble metal based multicomponent thin films will be discussed in terms of mutlfunctionality.

• 복식
• /
• 제52권6호
• /
• pp.115-126
• /
• 2002

This study is regarding on the shroud of Jeonjoo Lee (Inpyoung clan's lady) excavated from the Andong Gwon's grave. who had passed away at 1722. Through this research, we understood the way of fetal ceremony by 18 centuries' royal family, and the costume style in those days. The style and size of shrouds were likely similar with ordinary dress. For the upper dress, Lady Andong Gwon wore a piece of undershirt (sosam), 3 layed jacket(Joggoli), an upper jacket (dangui) with patched badge as well as a gold brocade formal dress(wonsam). And for the lower dress, 2 layed underpants(dansokot) and 2 layed long skirts were worn. Especially, prototype of the waist band for shroud(gowdo) and a kind of headgear(gokdoli) was found in this study along with the headdress for woman's shroud(yomo) and the shoes for woman's shroud(chahwea). In this study, understanding the costume of upper class at 18 centuries during Chosun Dynasty.

• 한국세라믹학회지
• /
• 제32권4호
• /
• pp.405-412
• /
• 1995

In order to estimate the wettability of the borosilicate glasses with different composition on the noble metals of gold and silver, the measurements of the contact angle between the solid and the liquid were made at various temperatures and holding times using the sessil-drop method. The wetting behavior and the adhesion of the phases were strongly influenced by the thermal or the physical characteristics of the materials. The dependence of wetting angle ($\theta$) on the holding time (t) could be represented by the relation of $\theta$=a.tb, whereby the wettability of the systems was quantitatively compared. Also with increasing content of borosilicate glass in the glass-gold matrix composite, the tensile strength was decreased whereas the elastic modulus was increased.

• 복식
• /
• 제55권8호
• /
• pp.57-72
• /
• 2005

Mongdueui(蒙頭衣) and mongduri(蒙頭里) in the Joseon dynasty was one of women's robe. The style of Mongdueui was same as Chinese baeja(褙子 $\cdot$ vest) having non-overlapping front opening with collar, This form was conformed through the wonsam excavated baeja from tomb of South Song dynasty. The basic construction was same as Joseon dynasty's except the collar. In the early Joseon dynasty the noble women wore Jangsam(長衫) as an outer wear, the common and lower class women wore Mongdueui, and the queen and royal household we baeja. The court lady wore baeja as well as Mongdueui for funeral ceremony. The style of women's robes was classified into two categories by the literature Byungwajip(甁窩集). The first was the hongjangsam(紅長衫長) in red for noble women. The other was the mongduri for the common lady. Whangchosam the outer wear of Jeongjaeyong(呈才女伶), a professional women entertainer, having non-overlapping front opening with collar, has been examined in the painting. And it had been evolved into the shaman's clothing in the last stage of Joseon dynasty.

• 한국대기환경학회지
• /
• 제14권1호
• /
• pp.63-72
• /
• 1998

Simultaneous CO and $C_3H_6$ oxidation was carried out over noble metal supported monolith catalysts in a flow thorugh type reactor at the temperature ranging from room temperature to $500^\circ$C. Pt and Pd were selected as major active species, 10wt% of Ce was impregnated as an additive and alumina and silica were used as supports. The reactant gases were simulated and the reaction products were analyzed by on-line G.C.. EDX, SEM, TGA, XRD and optical microscope were used to analyze the characteristics of the prepared catalysts. Under the given conditions in this study, the catalysts supported on alumina showed better activity for CO oxidation, while Pd catalysts showed better activity for $C_3H_6$ oxidation. The improvement of conversion due to increase in thermal stability possibily by Ce addition was observed only for Pt catalysts.

• 한국재료학회지
• /
• 제13권5호
• /
• pp.285-291
• /
• 2003

The nanosized silver and gold particles are prepared by ERC method in which metal vapors with high temperature is rapidly quenched by coolants such as liquid nitrogen or liquid argon. In order to monitor the crystal structural changes on the internal and the surface of the nanosized noble metal particles, lattice parameter, internal strain and Debye-Waller factor are investigated, and the calculation of X-ray diffraction scattering intensity is performed. The lattice parameters of silver and gold particles agree with those of bulk materials, and crystal internal strain of the metal particles is not changed by rapid cooling. The Debye-Waller factor of gold particles is increased with decreasing particle size because of the surface softening phenomenon of nanosized particles, but the crystal structural change on the surface of the particles is not detected from the comparison the calculated X-ray diffraction profile with the experimental profile on gold particles with the particle size of 4 nm.

• 한국마린엔지니어링학회:학술대회논문집
• /
• 한국마린엔지니어링학회 2002년도 춘계학술대회논문집
• /
• pp.147-152
• /
• 2002

This paper was studied on corrosion of heat exchanger tube for absorption refrigeration machine. In the 62 % lithium bromide solution at $60^{\circ}C$, polarization test of Cu, Al-brass, 10 % cupro nickel(90-10 % Cu-Ni) and 30 % cupronickel(70-30 % Cu-Ni) tube was carried out. And polarization behavior, polarization resistance characteristics, open circuit potential, anodic polarization of heat exchanger tube for absorption refrigeration machine were considered. The main results are as following: The open circuit potential of Al-brass tube becomes less noble than that of Cu tube, corrosion current density of that becomes lower than Cu tube. The open circuit potential of cupronickel tube is more noble than that of Cu tube, corrosion current density of that is controlled than Cu tube. The passivation critical current of 30 % Cu-Ni tube is lower than that of 10 % Cu-Ni tube, potential of passive region of that is more wide than 10 % Cu-Ni tube.

• 전력전자학회:학술대회논문집
• /
• 전력전자학회 1998년도 Proceedings ICPE 98 1998 International Conference on Power Electronics
• /
• pp.518-523
• /
• 1998

In this paper, a noble dead time minimization algorithm is presented for developing the outputs of inverters. The adverse effects of the dead time are examined. The principle of the proposed algorithm is explained with the conduction modes of the output currents. The H/W and the S/W construction method of the proposed algorithm are also presented. The validity of the proposed algorithm is verified by comparing simulation and experimental results with those of the conventional methods. It can be concluded from the results that the proposed algorithm have the virtue which is able to ruduce the numbers of inverter switching and the harmonics in the output voltages, and which make the output voltage equal to the reference value.

• 수산해양기술연구
• /
• 제28권3호
• /
• pp.286-294
• /
• 1992

In this paper, the corrosion fatigue crack propagation behavior of structure rolled steel (SWS 41C) was investigated by changing the thickness, and this experiment was done by the three point bending corrosion fatigue tester. The main results obtained are as follows: 1) As the thickness of specimen becomes thicker, the corrosion sensitivity to initial stage crack becomes some sensitive, and that the fatigue life becomes more sensitive. 2) The crack growth rate to initial stage crack (da/dN) was retarded as the thickness of specimen becomes thicker. But after initial stage crack, as the thickness of specimen is more thicker, da/dN is more rapid. 3) As the corrosion fatigue crack length grows, the accelerative factor of thick specimen (t=12mm) is more higher than that of thin specimen (t=6mm). 4) As the corrosion fatigue crack length grows, the corroson potential of both thick specimen and thin specimen becomes more less noble potential, however thick specimen (t=12mm) tends to more less noble potential than that of thin specimen(t=6mm).

• 대한전기학회:학술대회논문집
• /
• 대한전기학회 1998년도 하계학술대회 논문집 F
• /
• pp.1902-1904
• /
• 1998

In this paper. a noble dead time minimization algorithm is presented for reducing the switching losses. Firstly, the effects of the inverter dead time are examined, Secondly the principle of the proposed algorithm is explained with the commutation conditions. And the validity of the proposed algorithm is verified by simulation results. We can conclude from the results that the proposed algorithm have a virtue which is able to reducing the hamonics in the output voltages and which make the output voltage equal to the reference vlaue. Another merit is this method can reduce the number of inverter switchings.