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Environmental measures in an asphalt mixture manufacturing plant
MASAOMI MATSUZAKI 한국도로학회 2017 한국도로학회 학술대회 발표논문 초록집 Vol.2017 No.10
Recently, in an asphalt mixture manufacturing plant, "environment" "safety" "energy saving and resource saving" is an important issue. Many plants already make efforts to save energy, that is, to reduce CO2 emissions by using low fuel consumption burners and devising to change the shape of the blades to improve the thermal efficiency in the drier. In addition, the heating and classification of stone materials and dust generated during mixing are handled by dust collectors. Furthermore, with regard to various materials used in plants, we are working on environmental conservation by emphasizing environmental pollution prevention and safety of working environment. However, recently, the location conditions of plants have diversified, such as the presence of residential areas in the vicinity of plants, and these measures are not enough. In this report, we report a part of the actual situation of "environment", "safety", "energy conservation and resource saving" adopted in plants in Japan. 1, Introduction to odor control In an asphalt mixture production plant, a special odor is generated by the trace amounts of hydrocarbon oxides and sulfur compounds when loading an exhaust stack or an asphalt mixture. In an asphalt mixture production plant, a special odor is generated by a very small amount of hydrocarbon oxides and sulfur compounds when the gas from the exhaust pipe and the transporting asphalt mixture. As a countermeasure against the odor of the exhaust pipe, a method of burning trace substances is adopted by using a deodorizing furnace, but since it consumes a large amount of energy, there is a problem of suppressing CO2 emission. In this report, we identify odor-causing substances from plant and propose odor reduction by deodorant suitable for these substances. 2, Introduction to anti-adhesion agents for asphalt Conventionally, mineral oil such as heavy oil and diesel oil was applied to deal with the adhesion of asphalt mixture to the equipment of asphalt mixture production plant, dump for delivery, finisher at construction, road roller and so on. However, by using a large amount of these mineral oils, a part of the asphalt composite material is cut back, causing problems such as pot holes after construction. In addition, problems such as water pollution due to leakage of mineral oil are also raised. In this report, we propose a water - soluble and biodegradable anti - adhesion agent. 3, Introduction to Recycling Additives More than 70% of the asphalt mixture used in Japan is a recycled mixture. Effective utilization of recycled mixture is the most important question to be considered from the perspective of resource protection, energy conservation, cost reduction. In Japan, initially, blends with asphalt with high needle penetration and low softening point and amethod of adding crude by-products of lubricating oil production has been adopted. However, in the former, the ratio of the recycled asphalt mixture is limited to about 10 to 20%, and in the latter case, since it is high viscosity, it is necessary to heat at the time of use, that the recycling effect is not sufficient. In addition, there is a problem in that it contains a large amount of aromatic moieties, especially polycyclic aromatic moieties, which are likely to be carcinogenic. In order to solve these problems, in this report, the combination of several kinds of special mineral oils and the use of special additives are used to achieve low viscosity, high flash point, low aromaticity, And high recycle additives are proposed. Asphalt mixture manufacturing plants in Japan are located in urban areas near the demand of large cities, so the environment is well considered. Recently, regulations such as the Air Pollution Prevention Ordinance, the Anti-Odor Prevention Ordinance and the Noise Prevention Ordinance have been strengthened. Furthermore, the safety training for workers using SDS for hazardous substances has been complicated is in fact. In order to solve these problems, we are not limited to this report, but we fully understand the needs of the plant and develop products that meet the environmental, safety, energy and resource conservation key words. I would like to propose.
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( Satoko Matsuzaki ),( Shinya Matsuzaki ),( Yutaka Ueda ),( Tomomi Egawa Takata ),( Kazuya Mimura ),( Takeshi Kanagawa ),( Eiichi Morii ),( Tadashi Kimura ) 대한산부인과학회 2014 Obstetrics & Gynecology Science Vol.57 No.5
Placenta previa presents a highest risk to pregnancy, and placenta accreta is the most serious. Placenta accreta requires cesarean delivery and often results in massive obstetric hemorrhage and higher maternal morbidity. Challenges associated with cesarean delivery techniques may contribute to increased maternal blood loss and morbidity rates. Several recent obstetric studies reported the usefulness of transverse uterine fundal incision for managing placenta accreta. We present a case of placenta percreta that was treated by a transverse fundal incision. We successfully avoided cutting through the placenta and helped decrease maternal blood loss. After delivery, the patient underwent a cesarean hysterectomy. Postoperative day 48, she experienced watery discharge and was diagnosed with vaginal fistula. We present our case and review the literature.
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일본에서의 한국어 듣기 교재 분석 연구:듣기 자료의 담화 유형 및 듣기 활동 분석을 중심으로
Matsuzaki Mahiru 경희대학교 언어정보연구소 2008 언어연구 Vol.25 No.1
The purpose of this study is to suggest improvement listening textbooks published in Japan. Recently, various textbooks of Korean language are published in Japan. Some listening textbooks are developed newly, too. However, the study on the textbook of the Korean language in Japan is not yet developed. For improving Korean listening textbooks in Japan, I analyzed the listening materials and listening activities of textbooks. The point of these analysis about the listening material have two points as the next. ① monologue or dialog, ② transactional or interactional. The listening activity was analyzed from the viewpoint of two as the next. ① top-down or bottom-up processing, ② interactional or not. As a result, listening textbooks in Japan was not shown interactional activities. For the improvement of listening ability, interactional activities will be necessary. In that the development of the textbook including various elements without the deflection is much important. I hope this study can contribute to improving Korean listening textbooks in Japan. (Kyung Hee University) The purpose of this study is to suggest improvement listening textbooks published in Japan. Recently, various textbooks of Korean language are published in Japan. Some listening textbooks are developed newly, too. However, the study on the textbook of the Korean language in Japan is not yet developed. For improving Korean listening textbooks in Japan, I analyzed the listening materials and listening activities of textbooks. The point of these analysis about the listening material have two points as the next. ① monologue or dialog, ② transactional or interactional. The listening activity was analyzed from the viewpoint of two as the next. ① top-down or bottom-up processing, ② interactional or not. As a result, listening textbooks in Japan was not shown interactional activities. For the improvement of listening ability, interactional activities will be necessary. In that the development of the textbook including various elements without the deflection is much important. I hope this study can contribute to improving Korean listening textbooks in Japan. (Kyung Hee University)
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Composition Control of YSZ Thin Film Prepared by MOCVD
Matsuzaki, Tomokazu,Okuda, Norikazu,Shinozaki, Kazuo,Mizutani, Nobuyasu,Funakubo, Hiroshi The Korean Ceramic Society 2000 The Korean journal of ceramics Vol.6 No.2
Zirconia films stabilized b $Y_2O_3$, YSZ, films were deposition by metal organic chemical vapor deposition (MOCVD) onto various kind of substrates. $Y_2O_3$, $ZrO_2$and the mixtures of these two were deposited and characterized. The deposition rate, the film composition and the structure could be systematically varied through the $Y(C_{11}H_{19}O_2)_3$, Zr(O.t-$C_H_9)_4$source gas ratios and the deposition temperature. The Y/Zr ratio in YSZ film could be adjusted by controlling the ratio of $Y(C_{11}H_{19}O_2)_3$, Zr(O.t-$C_4H_9)_4$partial pressures. This is because the ratios of the deposition rates of Y and Zr atoms in $Y_2O_3$and $ZrO_2$films to those in YSZ films, Ф, are constant irrespective of the input gas concentration. However, the Y/Zr ratio was found to be smaller than that estimated based on the deposition rates of un-mixed $Y_2O_3$and $ZrO_2$films. This is because the Фs of Y and Zr atoms are not equal. The activation energy of $Y_2O_3$component in YSZ films was similar to that of $ZrO_2$component in YSZ films. These YSZ values were more than 4 times larger than those of un-mixed $Y_2O_3$or $ZrO_2$films.
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An Overview of Flutter Prediction in Tests Based on Stability Criteria in Discrete-Time Domain
Matsuzaki, Yuji The Korean Society for Aeronautical and Space Scie 2011 International Journal of Aeronautical and Space Sc Vol.12 No.4
This paper presents an overview on flutter boundary prediction in tests which is principally based on a system stability measure, named Jury's stability criterion, defined in the discrete-time domain, accompanied with the use of autoregressive moving-average (AR-MA) representation of a sampled sequence of wing responses excited by continuous air turbulences. Stability parameters applicable to two-, three- and multi-mode systems, that is, the flutter margin for discrete-time systems derived from Jury's criterion are also described. Actual applications of these measures to flutter tests performed in subsonic, transonic and supersonic wind tunnels, not only stationary flutter tests but also a nonstationary one in which the dynamic pressure increased in a fixed rate, are presented. An extension of the concept of nonstationary process approach to an analysis of flutter prediction of a morphing wing for which the instability takes place during the process of structural morphing will also be mentioned. Another extension of analytical approach to a multi-mode aeroelastic system is presented, too. Comparisons between the prediction based on the digital techniques mentioned above and the traditional damping method are given. A future possible application of the system stability approach to flight test will be finally discussed.
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