• Title/Summary/Keyword: L.W.O.S.T

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4.1” Transparent QCIF AMOLED Display Driven by High Mobility Bottom Gate a-IGZO Thin-film Transistors

  • Jeong, J.K.;Kim, M.;Jeong, J.H.;Lee, H.J.;Ahn, T.K.;Shin, H.S.;Kang, K.Y.;Park, J.S.;Yang, H,;Chung, H.J.;Mo, Y.G.;Kim, H.D.;Seo, H.
    • 한국정보디스플레이학회:학술대회논문집
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    • 2007.08a
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    • pp.145-148
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    • 2007
  • The authors report on the fabrication of thin film transistors (TFTs) that use amorphous indium-gallium-zinc oxide (a-IGZO) channel and have the channel length (L) and width (W) patterned by dry etching. To prevent the plasma damage of active channel, a 100-nm-thckness $SiO_{x}$ by PECVD was adopted as an etch-stopper structure. IGZO TFT (W/L=10/50${\mu}m$) fabricated on glass exhibited the high performance mobility of $35.8\;cm^2/Vs$, a subthreshold gate voltage swing of $0.59V/dec$, and $I_{on/off}$ of $4.9{\times}10^6$. In addition, 4.1” transparent QCIF active-matrix organic light-emitting diode display were successfully fabricated, which was driven by a-IGZO TFTs.

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INDUCTION PLASMA DEPOSITION TECHNOLOGY FOR NUCLEAR FUEL FABRICATION

  • I. H. Jung;K. K. Bae;Lee, J. W.;Kim, T. K.;M. S. Yang
    • Proceedings of the Korean Nuclear Society Conference
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    • 1998.05b
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    • pp.216-221
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    • 1998
  • A study on induction plasma deposition with ceramic materials, yttria-stabilized-zirconia ZrO$_2$-Y$_2$O$_3$ (m.p 264O $^{\circ}C$), was conducted with a view developing a new method for nuclear fuel fabrication Before making dense pellets more than 96%TD., the spraying condition was optimized through the process parameters, such as chamber pressure, plasma plate power powder spraying distance, sheath gas composition, probe position, particle size and powders different morphology. The results with a 5mm thick deposit on rectangular planar graphite substrates showed a 97.11% theoretical density when the sheath gas flow rate was Ar/H$_2$120/20 l/min, probe position 8cm, particle size -75 ${\mu}{\textrm}{m}$ and spraying distance 22cm by AMDRY146 powder. The degree of influence of the main effects on density were powder morphology. particle size, sheath gas composition, plate power and spraying distance, in that order. Among the two parameter interactions, the sheath gas composition and chamber pressure affects density greatly. By using the multi-pellets mold wheel type, the pellet density did not exceed 94%T.D., owing to the spraying angle.

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Characteristics of the General American English exposed in Tourist Business (관광산업 현장에서 표출되는 미국 영어의 특색)

  • Hong, Kwang-Hee
    • Korean Business Review
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    • v.5
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    • pp.241-274
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    • 1992
  • General American English(=A.E.) has conservative elements as well as progressive elements. A.E. and B.E. are languages which have more similarities than differances. In this paper. I studied the process of English progress before the A.E. had come into being, and the historical background and the cahristics of A.E. coming into being. Considering the differences between A.E. and B.E. from spelling, pronunciation, vocabulary and grammar, I can give the outline as follows. A spelling 1. B.E. : au, ou $${\rightarrow}$$A.E. : a, o 2. B.E. : e $${\rightarrow}$$A.E. : i 3. B.E. : $${\ae}$$ oe $${\rightarrow}$$A.E. : e 4. B.E. : our $${\rightarrow}$$A.E. : or 5. B.E. : re $${\rightarrow}$$A.E. : er B. pronunciation 1. B.E. : [e] $${\rightarrow}$$A.E. : [i], [e], $$[\partial]$$ 2. B.E. : [a] $${\rightarrow}$$A.E. : 3. B.E. : [i(:)] $${\rightarrow}$$A.E. : [ai], $$[\partial]$$, $$[{\varepsilon}]$$ 4. B.E. : $$[{\ae}]$$ $${\rightarrow}$$A.E. : [e], [c] 5. B.E. : [ai] $${\rightarrow}$$A.E. : $$[{\ae}]$$, [e] 6. B.E. : [c] $${\rightarrow}$$A.E. : [e], [a], [o] 7. In case of "Vowel+[t]+Vowel", [t] is pronounced into [d] or [r] 8. In case of "-nt", [t] becomes a mute. 9. [t]+[j, l, m, n, r, u, or, w] $${\rightarrow}$$A.E. : [?] (=glottal stop) 10. B.E. : [w] $${\rightarrow}$$A.E. : [hw] 11. B.E. : [Voiceless consonants], [Voiced consonants] $${\leftarrow}$$A.E. : [Voiced consonants], [Voiceless consonants] C. Vocabulary The historical background and geographical conditions of those days caused lots of new compounds and neologies. D. Grammar Though we use "of" to indicate the possessive case of inanimate object, -s genitive is used in A.E. In the perfect tense, "have" is often omitted and also auxiliary verb "will" is used in any case

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Interlaminar Shear Stresses of Laminated Composite Plates Subjected to Transversely Imp (횡방향 충격을 받는 적층복합판의 층간전단응력 해석)

  • Ahn, Kook-Chan;Park, Seung-Bum;Kim, Bong-Hwan
    • Journal of the Korean Society of Safety
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    • v.17 no.4
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    • pp.31-37
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    • 2002
  • This paper demonstrates the analyses of the interlaminar shear stress of laminated composite plates subjected to transversely impact. For this purpose, a plate finite element model based on the higher order shear deformation plate theory in conjunction with static contact laws is developed. Test materials were CFRP with cross-ply laminate $[O_4/{\theta}_4]_S$, $[90_4/{\theta}_4]_S$ stacking sequences and angle-ply laminate $[{\theta}_4/-{\theta}_4]_S$, $[{\theta}_4/-{\theta}_4]_S$ stacking deguences with $2^t{\times}40^w{\times}100^l(mm)$ dimension. As a result, stacking seguence and fiber orientation were found to have a significant effect on the interlaminar stresses in composite laminates.

A Study on the Amount and Major Compositions of Excreta from Broilers (육계의 분뇨 배설량 및 분뇨 성분 조사 결과)

  • HwangBo, J.;Hong, E.C.;Chung, I.B.;Kang, K.H.;Park, H.D.;Suh, O.S.;Chung, W.T.;Jang, S.K.
    • Korean Journal of Poultry Science
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    • v.36 no.2
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    • pp.157-163
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    • 2009
  • This work was conducted to investigate the amount and major compositions of excreta from broilers. One hundred fifty 1-d-old male and female Ross broilers were used in this work and ten broilers were selected to measure excreta. Average amount of excreta per broiler was 85.4 g, and average moisture content was 76.9%. N, $P_2O_5$ and $K_2O$ in excreta were 1.19, 0.29 and 0.49%, respectively. pH, $BOD_5$, $COD_{mn}$, and SS were 7.80, 42,134 mg/L, 52,668 mg/L, and 106,669 mg/L, respectively. Pb in poultry excreta was 0.803 mg/kg and highly lowed compared with the standard contents (150 mg/kg). Cd was not founded in excreta. Hg was founded in excreta as 0.002 mg/kg, but it was low compared with the standard level (2 mg/kg).

A Study on the Usage of Miào(廟) and Gōng(宮) in Zhou Dynasty through the Mentions to Them in the Scripture Sentences of 『Chūn-qiū(春秋)』 - In the Process of Investigating the Existence of Zhou Dynasty's System to Regulate the Number of Zōng-miào(宗廟) 【1/2】 (『춘추』 경문에서의 묘(廟)·궁(宮) 언급을 통한 주대(周代)의 그 쓰임 사례 일고찰 - 주대의 묘수제(廟數制) 실재 여부에 대한 궁구 과정에서 【1/2】-)

  • Seo, Jeong-Hwa
    • The Journal of Korean Philosophical History
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    • no.57
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    • pp.57-90
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    • 2018
  • In this discussion, as a way to verify the existence of the system to regulate Zhou dynasty's $z{\bar{o}}ng-mi{\grave{a}}o$(宗廟) numbers, the discussion was focused on '$mi{\grave{a}}o$ (廟)' and '$g{\bar{o}}ng$(宮)' in the records of "$Ch{\bar{u}}n-qi{\bar{u}}$(春秋)". As for the parts where the contents of scripture sentences were not specific, the context of the case was investigated through the writings in "$Zu{\breve{o}}-zhu{\grave{a}}n$(左傳)" and other materials. In the cases of the usage of the letter, '$mi{\grave{a}}o$(廟 : a ruler's house, a nation's royal court)', in the scripture sentences in "$Ch{\bar{u}}n-qi{\bar{u}}$(春秋)", the followings need to be noticed. In $t{\grave{a}}i-mi{\grave{a}}o$(太廟) of State $L{\check{u}}$(魯), nationwide events and a ruler's political ancestral rite, $d{\grave{i}}$(?) ritual, were performed, and fancy tools for ancestral rites used in those rituals were equipped. As for the $z{\bar{o}}ng-mi{\grave{a}}o$(宗廟) of a ruler of those times, a ritual of royal court, $ch{\acute{a}}o$(朝) rite, was performed. The usage case of the letter, '$g{\bar{o}}ng$(宮 : house)', is as the following. In $g{\bar{o}}ng$(宮) where a ruler's personal family lived was a family ancestral rite for them carried out. The record about the ornate decorating for the $hu{\acute{a}}n-g{\bar{o}}ng$ house(桓宮), which can be said to have been the political base of $s{\bar{a}}n-hu{\acute{a}}n-sh{\grave{i}}$(三桓氏), three politically noble families of State $L{\check{u}}$(魯), is outstanding. The $x{\bar{i}}-g{\bar{o}}ng$ house(西宮) during $X{\bar{i}}-g{\bar{o}}ng$(魯 僖公)'s reign and a $x{\bar{i}}n-g{\bar{o}}ng$ house(新宮 : a newly built house) destroyed by fire at the third year of $Ch{\acute{e}}ng-g{\bar{o}}ng$(魯 成公), are assumed to have been a ruler's another house, such as the $ch{\check{u}}-g{\bar{o}}ng$ house(楚宮) in which $Xi{\bar{a}}ng-g{\bar{o}}ng$(魯 襄公) used to enjoy staying, which is different from the viewpoint that it might be a $m{\acute{i}}-g{\bar{o}}ng$ shrine(?宮 : a house constructed as a shrine for the deceased father or the deceased grand father) that had been formed since Han dynasty. It has been discussed that, regarding the records that the '$w{\check{u}}-g{\bar{o}}ng$ house(武宮) was built' and that the '$y{\acute{a}}ng-g{\bar{o}}ng$ house(煬宮) was built', certain buildings were established with the symbols of '$w{\check{u}}$(武 : martial arts and force of arms)' and '$y{\acute{a}}ng$(煬 : to burn and get rid of everything)', and the events that a lord stood as its lord continued. Therefore, its main goal was not the performance of a dutiful ancestral rite by a ruler of those times for deceased rulers, for instance, $W{\check{u}}-g{\bar{o}}ng$(魯 武公) or $Y{\acute{a}}ng-g{\bar{o}}ng$(魯 煬公), but display of certain political symbolism through the ritual. This symbolism is most obvious with the $hu{\acute{a}}n-g{\bar{o}}ng$ house(桓宮) and the $x{\bar{i}}-g{\bar{o}}ng$ house(僖宮). As a consequence, all $mi{\grave{a}}os$(廟) and $g{\bar{o}}ngs$(宮) in scripture sentences had the functions of a shrine in some part, but it has been verified that they were not the buildings set up as a shrine to follow '$z{\bar{o}}ng-mi{\grave{a}}o$(宗廟)'s number regulation system' of '$ti{\bar{a}}nz{\check{i}}-7-mi{\grave{a}}o$(天子七廟 : an emperor owns seven $mi{\grave{a}}os$(廟))' or '$zh{\bar{u}}h{\acute{o}}u-5-mi{\grave{a}}o$(諸侯五廟 : a lord owns five $mi{\grave{a}}os$(廟))'.

Numerical Evaluation of Backward Extrusion and Head Nosing for Producing a 6.75L Small Seamless AA6061 Liner (6.75L급 소형 AA6061 라이너의 후방압출 및 노우징 공정에 관한 해석적 연구)

  • Ku, T.W.;Kang, B.S.
    • Transactions of Materials Processing
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    • v.22 no.4
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    • pp.204-215
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    • 2013
  • As a pressure vessel, a small seamless aluminum liner with inner volume of about 6.75L is made from an initial billet material of AA6061-O. To produce the aluminum liner, warm forging including backward extrusion and head nosing was numerically simulated using a billet initially pre-heated to about $480^{\circ}C$. Compression tests on the billet material were performed at various temperatures and strain rates, and the measured mechanical properties were used in the numerical simulations. For the backward extrusion and the head nosing, the tool geometries were designed based on the desired configuration of the aluminum liner. Furthermore, the structural integrity of the tooling was evaluated to ensure adequate tool life. The seamless aluminum liner has an endurance limit of about 1.47MPa ($15Kg_f/cm^2$), estimated based on the required inner pressure. The results confirm that the small seamless aluminum liner of AA6061-O can be successfully made by using the two stage warm forging procedures without any bursting failures.

Fabrication of Rubber Block by using Recycled Waste Tires (폐타이어 재활용 고무보도블럭의 제조에 관한 연구)

  • 김진국
    • Resources Recycling
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    • v.4 no.4
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    • pp.70-75
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    • 1995
  • Waste tires arc used as landifill, combustion and recycling. Rccenllg. lhc recycling of waste tires received a great attentmu fiam all industries. Thc rccgcling methods for w s l e tires are classified inla three culegoljz, a whole tirc, cmmb rubha and energy. T h ~ ssl iidy invesligvled the pruduclion ol Lhc ruhhcr block by using clumh cubbel oI wasle Ires. The process 01 manulacluring the ~uhher block was co~lsislerl ol several slepc: collecting lilts, ctuilnng and grinding hrcs, mixing crumh ruhher wlth bmder. and shaping under heat and pressure The effccl ol binder on ll~e ~uecl~ilnicaplr opcrlics o l r uhher hlock war also investigalcd. The economic feaqihility of a surface treiilmcnl and multilayas on the rubber block was dclcimincd

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Microstructure Characteristics and Electrical Properties of Sintered $(Bi,La)_4Ti_3O_{12}$ Ferroelectric Ceramics

  • Yoo, H.S.;Son, Y.H.;Hong, T.W.;Ur, S.C.;Ryu, S.L.;Kweon, S.Y.
    • Proceedings of the Korean Powder Metallurgy Institute Conference
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    • 2006.09a
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    • pp.533-534
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    • 2006
  • 1mm-thick BLT ceramics were sintered in accordance with a bulk ceramic fabrication process. All XRD peaks detected in the sintered ceramics were indexed as the Bi-layered perovskite structure without secondary phases. Density was increased with increasing the sintering temperature up to $1050\;^{\circ}C$ and the maximum value was about 98% of the theoretical density. The remanent polarization (2Pr) value of BLT ceramic sintered at $1050\;^{\circ}C$ was approximately $6.5\;{\mu}C/cm^2$ at the applied voltage of 4.5kV. From these results, a BLT ceramic target for plused laser deposition (PLD) system was successfully fabricated.

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Development of Link Mechanism for a 154kV Cross Linked Polyethylene Cable on Bridge (교량 첨가 전력 케이블 신축균등흡수장치 개발)

  • Oh, J.O.;Ro, K.J.;Heo, H.D.;Lee, S.H.;Kim, W.B.;Kim, C.M.;Lee, T.J.;Kim, C.S.;Baek, J.H.
    • Proceedings of the KIEE Conference
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    • 2000.07c
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    • pp.2081-2082
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    • 2000
  • 서강대교와 같은 장경간 교량에 초고압 전력케이블을 설치하는 경우에는 교량의 큰 신축을 흡수하기 위하여 케이블을 장대옵셋으로 설치하는 것이 불가피하게 되고, 장대옵셋 케이블이 균등하게 변형할 수 있도록 신축균등흡수장치를 실증시험을 통하여 국내에서 최초로 개발하고 154kV 중여T/L 구간중 서강대교에 총12기를 설치 완료하였다. 본 고에서는 그 개요를 소개하고자 한다.

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