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- 저자 : Mukuta, Chisato (검색결과 4 건)
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Fundamental study on sustainable treatment system of mine water using magnetized solid catalyst
Mukuta, Chisato,Akiyama, Yoko The Korea Institute of Applied Superconductivity a 2019 한국초전도저온공학회논문지 Vol.21 No.2
In the mine exploration sites, sustainable treatment system of mine water with energy saving and minimized chemical additives is required. Since most of the mine water contains highly-concentrated ferrous ion, it is necessary to study on the removal method of iron ions. We propose the system consisting of two processes; precipitation process by air oxidation using solid catalyst-modified magnetite and separation process combining gravitational sedimentation and magnetic separation using a permanent magnet. Firstly, in the precipitation process (a former process of the system), we succeeded to prepare solid catalyst-modified magnetite. Air oxidation using solid catalyst-modified magnetite using $Fe_2(SO_4)_3$ as a starting material showed high iron removal capability. Secondly, in the separation process (latter process of the system), solid catalyst-modified magnetite using $Fe_2(SO_4)_3$ as a starting material can be separated by a superconducting bulk magnet and a permanent magnet.
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Introducing Bio-Degradable Sanitary Towels inSchools in Kitui
Maurine Mukuta Muthengi 이화여자대학교 아시아여성학센터 2015 이화여자대학교 아시아여성학센터 학술대회자료집 Vol.2015 No.7
Universal education is one of the millennial development goal set to be achieved in the world. According to UNICEF there are 31 million girls of primary school age not enrolled in school. Well how can we achieve this goal when girls are not enrolled in school or drop out due to early child marriages and other cultural practices such as female genital mutilation, poverty, lack of school fees, sexual violence and lack of SANITARY TOWELS? How can we achieve this goal when girls miss close to 5 days of school because they cannot afford sanitary towels? In this paper I have explained the problems girls schooling in the rural areas face during their menstruation cycle and the need for introducing an affordable option. Sanitary towels are very expensive and girls from poor families in the rural areas use unhygienic methods during their menstruation such as old pieces of clothes, tissue papers, cotton wool, blankets, tree leaves, feathers, some sit on soil and old goat skins. These girls are more likely to suffer from vaginal infections. Others end up engaging in transactional sex in order to get money to buy sanitary towels this exposes the young girls to risks of getting HIV/AIDS and some end up pregnant thus dropping out of school. The period around puberty many girls drop out of school or are absent for close to 5 days of school. Girls in primary school miss 18 weeks of school a year while girls from secondary school miss 24 weeks in a year. Limited access to safe, affordable, convenient and appropriate methods for dealing with menstruation has far reaching implications for the rights, physical, social and mental wellbeing of many adolescent girls in Kitui, Kenya. For a typical poor Kenyan family there is little money to barely cater for food. Sanitary towels are not a priority. We would like to introduce bio-degradable sanitary towels using banana fibers; they are eco-friendly, hygienic and affordable. Providing these bio degradable sanitary towels to girls would be a life changer for numerous reasons such as hygiene, health, education and empowerment. Because it can greatly improve a girl’s overall school experience, performance and boost self-esteem and confidence. The girls are able to participate fully in class and feel more comfortable.
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Fundamental study on sustainable treatment system of mine water using magnetized solid catalyst
Chisato Mukuta,Yoko Akiyama 한국초전도.저온공학회 2019 한국초전도저온공학회논문지 Vol.21 No.2
In the mine exploration sites, sustainable treatment system of mine water with energy saving and minimized chemical additives is required. Since most of the mine water contains highly-concentrated ferrous ion, it is necessary to study on the removal method of iron ions. We propose the system consisting of two processes; precipitation process by air oxidation using solid catalyst-modified magnetite and separation process combining gravitational sedimentation and magnetic separation using a permanent magnet. Firstly, in the precipitation process (a former process of the system), we succeeded to prepare solid catalyst-modified magnetite. Air oxidation using solid catalyst-modified magnetite using Fe2(SO4)3 as a starting material showed high iron removal capability. Secondly, in the separation process (latter process of the system), solid catalyst-modified magnetite using Fe2(SO4)3 as a starting material can be separated by a superconducting bulk magnet and a permanent magnet.
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Noise Reduction and Signal Enhancement in IVR Images by ICA Shrinkage Filters and Multiscale Filters
Kiyotaka Matsuo,Xianhua Han,Koichi Shibata,Yukio Mishina,Yoshihiro Mukuta,Yen-Wei Chen 대한전자공학회 2008 ITC-CSCC :International Technical Conference on Ci Vol.2008 No.7
Interventional Radiology (IVR) is an important technique to visualize and diagnosis the vascular disease. In real medical application, a weak x-ray radiation source is used for imaging in order to reduce the radiation dose, resulting in a low contrast noisy image. It is important to develop a method to smooth out the noise while enhance the vascular structure. In this paper, we propose to combine an ICA Shrinkage filter with a multiscale filter for enhancement of IVR images. The ICA shrinkage filter is used for noise reduction and the multiscale filter is used for enhancement of vascular structure. Experimental results show that the quality of the image can be dramatically improved without any blurring in edge by the proposed method. Simultaneous noise reduction and vessel enhancement have been achieved.
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