• Title/Summary/Keyword: sieve method

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A Study on the Quality Properties of Recycled Sand by Produced Dry Manufacturing System and Wet Manufacturing System (건식생산 및 습식생산시스템에 의해 생산된 순환모래의 품질특성에 관한 연구)

  • Song, Ha-Young;Lee, Sang-Soo;Lee, Ji-Hwan;Lee, Yun-Seong
    • Journal of the Korean Recycled Construction Resources Institute
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    • v.4 no.2
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    • pp.74-84
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    • 2009
  • The study aims that high quality recycled sand by wet manufacturing system can be used in practical way through basic material property. The basic material property test was done by 4 categories, dry manufacturing system (1) tandem and (2) parallel, wet manufacturing system (3) large capacity and (4) small capacity. RS-IV is the final production of (1) to (4) method, it is tested via KS F 2573 (recycled fine aggregate). RS-IV is satisfied with 4 items, those are absolute dry density, 0.08mm sieve throughput, clay lump amount, and organic impurity substance content. However, absorptivity item has problem in (1) and (2) method, (3) and (4) method are confirmed with norms 5% low. Also, the production quality of wet manufacturing system is better than dry manufacturing system in absolute dry density, absorptivity, 0.08mm sieve throughput, and clay lump amount.

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Synthesis of Al-SBA-1 molecular sieve and its application in synthesis reaction of Coumarins (Al-SBA-1 분자체의 합성과 Coumarins합성반응에 축매특성 연구)

  • Peng, Mei Mei;Hemalatha, Pushparaj;Ganesh, Mani;Jang, Hyun-Tae;Cha, Wang-Seog
    • Proceedings of the KAIS Fall Conference
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    • 2012.05a
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    • pp.431-435
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    • 2012
  • Aluminum containing mesoporous molecular sieves Al-SBA-1 ($n_{Si}/n_{Al}$= 2, 5, 10, 15) was synthesized with a one-step method, and the catalyst was characterized with powder X-ray diffraction (XRD), nitrogen adsorption-desorption, thermogravimetric analysis (TGA), scanning electron microscopy (SEM) and Fourier transform infrared spectroscopy (FT-IR). Finally, we studied the catalytic activities of Al-SBA-1 molecular sieves in Pechmann reaction of 3-methoxyphenol and Ethyl acetoacetate to get 7-methoxy-4-methyl coumarin. Four parameters reaction temperature, time, catalyst weight and reactants ratio were optimized.

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Amputation level for hard tissue formation in pulp with tetracalcium / dicalcium phosphate compound.

  • Yoshikawa, M.;Toda, T.
    • Proceedings of the KACD Conference
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    • 2001.11a
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    • pp.566.1-566
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    • 2001
  • The most desirable healing process for endodontic therapy is apical closure by hard tissue such as dentine or cementum. Then, we estimated hard tissue conductivity of tetracalcium phosphate (4CP)/dicalcium phosphate (2CP) compound using mandibular first molars of SD rats. Residual pulp responses to the calcium phosphate compound were examined at several amputation levels of pulp. 2CP was purchased and passed through a $32-\mu\textrm{m}$ sieve. 4CP was obtained from a stoichiometric mixture of 2CP and calcium carbonate (Mol ratio: Ca/P=2.0) by the dry synthetic method at 1, 400(C for 8 hours.(omitted)

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A Study on the Standardization of the Preparation Method for Waxy Rice Nochi (찹쌀 노치 제조법에 관한 연구)

  • 정영선;이혜수
    • Korean journal of food and cookery science
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    • v.7 no.4
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    • pp.9-13
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    • 1991
  • Nochi is a kind of Korean traditional food made from glutinous rice or millet. This study attempted to examine the effects o( the various factors and to clarify the factors which affect the overall eating quality of Noch. The results were summarized as follows. 1. Starch content of waxy rice was 72.4% and IBC was 0.017%. 2. $\alpha$-amylase and $\beta$-amylase activity of malt were 40.13 and 8.94 units respectively. 3. Waxy rice soaked for 3 hours was ground to flour then sifted 20 mesh sieve. The mixture of waxy rice and malt was steamed for 20 minutes. 4. In sensory evaluation on varying the amount of malt and incubation time, the most favorite tendancy of the overall eating quality was at the level of 8hours incubation made by 5% addition of malt. 5. Total sugar contents, reducing sugar contents and the intensities of iodine stain at the incubation temperature of $60^{\circ}C$ were significantly different from those at $50^{\circ}C$.

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Carbonized grains excavated at Nook-Do (늑도에서 출토된 탄화곡)

  • Heu M.H.;Suh H.S.;Lee J.H.;Ahn S.H.
    • KOMUNHWA
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    • no.57
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    • pp.25-39
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    • 2001
  • Carbonized wheat(Triticum aestivum), barley(Horudeum vulgare) and rice (Oryza sativa) grams were excavated at the AD 3C. old site in Nook-Do Kyungsang-South province. By the sieve floating method 180 grains of wheat, 4 grains of barley and 6 grains of ric

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Reduction Behaviors of Nitric Oxides on Copper-decorated Mesoporous Molecular Sieves

  • Cho, Ki-Sook;Kim, Byung-Joo;Kim, Seok;Kim, Sung-Hyun;Park, Soo-Jin
    • Bulletin of the Korean Chemical Society
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    • v.31 no.1
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    • pp.100-103
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    • 2010
  • In this study, NO reduction behaviors of copper-loaded mesoporous molecular sieves (Cu/MCM-41) have been investigated. The Cu loading on MCM-41 surfaces was accomplished by a chemical reduction method with different Cu contents (5, 10, 20, and 40%). $N_2/77$ K adsorption isotherm characteristics, including the specific surface area and pore volume, were studied by BET's equation. NO reduction behaviors were confirmed by a gas chromatography. From the experimental results, the Cu loading amount on MCM-41 led to the increase of NO reduction efficiency in spite of decreasing the specific surface area of catalysts. This result indicates that highly ordered porous structure in the MCM-41 and the presence of active metal particles lead the synergistical NO reduction reactions due to the increase in adsorption energy of MCM-41 surfaces by the Cu particles.

Korean Coreference Resolution with Guided Mention Pair Model Using Deep Learning

  • Park, Cheoneum;Choi, Kyoung-Ho;Lee, Changki;Lim, Soojong
    • ETRI Journal
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    • v.38 no.6
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    • pp.1207-1217
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    • 2016
  • The general method of machine learning has encountered disadvantages in terms of the significant amount of time and effort required for feature extraction and engineering in natural language processing. However, in recent years, these disadvantages have been solved using deep learning. In this paper, we propose a mention pair (MP) model using deep learning, and a system that combines both rule-based and deep learning-based systems using a guided MP as a coreference resolution, which is an information extraction technique. Our experiment results confirm that the proposed deep-learning based coreference resolution system achieves a better level of performance than rule- and statistics-based systems applied separately

An Analytical Study on "GANPYUN CHOSUN YORI-JEBUP"- Main Dishes, Side-Dishes - ("간편조선요리제법"의 분석적 연구- 主食, 饌物類 -)

  • 이강자
    • Journal of the East Asian Society of Dietary Life
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    • v.9 no.4
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    • pp.409-420
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    • 1999
  • $\ulcorner$GANPYUN CHOSUN YORI-JEBUP$\lrcorner$,a book of cooking was written in Korean in 1934. The kinds of food were analyzed of cooking method, materials, measuring unit of materials by this book. Findings from this book are summarized as follows: 1. There were 8 kinds of Bap and 18 kinds of Zook. 2. There were 31 kinds of Korean Soup. 10 kinds of Ziggae, 4 kinds of Jun-gol. 3. There were Side-dishes including 6 kinds of Jim, 5 kinds of Jijimee, 7 kinds of Sanjuk, 9 kinds of Junyua. 18 kinds of Na-mool, 4 kinds of Moo-chim, 3 kinds of Ho, and 15 kinds of Po and were 8 kinds of dry side-dish. 4. Utensil to be used che(sieve), sot(pot). nambi(pan), Sugarak(spoon), and yang peon(bowl). 5. The measuring units were various. for example mal, dei, hob, etc. 6. The processing of cooking included preparation and boiling process. The processing of preparation were puting. mixing, and being cold, and the processing of heating were steaming and boiling.

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Low Temperature Adsorption of Hydrogen on Nanoporous Materials

  • Jhung, Sung-Hwa;Yoon, Ji-Woong;Kim, Hye-Kyung;Chang, Jong-San
    • Bulletin of the Korean Chemical Society
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    • v.26 no.7
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    • pp.1075-1078
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    • 2005
  • Hydrogen adsorption on various porous materials have been studied with a volumetric method at low temperature in the pressure of 0-760 torr. Their hydrogen uptakes depend at least partly on microporosity rather than total porosity. However, it is also necessary to consider other parameters such as pore size and pore architecture to explain the adsorption capacity. The heat of adsorption and adsorption-desorption-readsorption experiments show that the hydrogen adsorption over the porous materials are composed of physisorption with negligible contribution of chemisorption. Among the porous materials studied in this work, SAPO-34 has the highest adsorption capacity of 160 mL/g at 77 K and 1 atm probably due to high micropore surface area, micropore volume and narrow pore diameter.

A Study on the Field Application Porous Concrete Pavement (투수성콘크리트포장의 현장적용에 관한 연구)

  • ;Man
    • Proceedings of the Korea Concrete Institute Conference
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    • 1997.04a
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    • pp.613-619
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    • 1997
  • The present study has an objetive to define the characteristic of the Porous Concrete to be used in the resistant layers of the pavement. Up to the moment there is no material which is capable which is capable of satisfying the mechanical resistances and drainability, two characterstics which interves, and a detailled study has been carried out on the same order to obtain the porous concrete of this study. such as: Mode and time of compaction. type of cement, water/cement ratio, maxium size of aggregates, sieve test. incorporation of some additives and additions etc., among them emphasizing the use of a method of compaction vibro-compression in the laboratory with which an optimum compacting was reached, and can be obtanied on the site with a spreader rated with double tamper. With this porous concrete for this study whose dominating characteristics is the drainability jointly with a high mechanical resistance. a safe and silence firm is obtained, with can be a great diffusion in the near future, for its application on the pavements. Based on these works carried out, there was the first experience in the world of field application with 25cm of resistance layer of Porous Concrete Pavement in Salamanca, Spain.

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