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Adaptive Noise Reduction Filter for Speech Using Cascaded Sandglass-type Neural Network
Hiroki Yoshimura,Tadaaki Shimizu,Toshie Matumura,Masaya Kimoto,Naoki Isu 대한전자공학회 2008 ITC-CSCC :International Technical Conference on Ci Vol.2008 No.7
In this study, we developed a new adaptive noise reduction filter (CSNNFR: Cascaded Sandglass-type Neural Network Noise Reduction Filter) which is extended from the SNNRF (Sandglass-type Neural Network Noise Reduction Filter). The CSNNRF can perform adaptive noise reduction while capturing dynamic characteristics of the speech signal, owing to the plasticity of the SNN. The CSNNRF is suitable for application to the hearing aid since the ease of hearing the speech signal after noise reduction is more important than the denoising rate. We examined the improvement rate of SN ratio and performed a hearing experiment to evaluate the performance of the CSNNRF as a hearing aid.
International Exchanges for Aspiring Students in Engineering Field
Sato, Takashi,Sakamoto, Shuichi,Shimizu, Tadaaki,Ikeda, Hideki,Oka, Tetsuo Korean Society for Engineering Education 2012 공학교육연구 Vol.15 No.4
In 1996, the Faculty of Engineering, Niigata University, Japan entered an era of open student-exchange with Otto-von-Guericke-University Magdeburg, Germany. Thus far, more than 50 of our students have devoted anywhere from three months, to an entire year of their courses, to collaborative efforts with fellow students, (-and some cases, the local citizenry) -in their native environment experiencing unfamiliar education systems and cultures.
Short-Term Student Exchanges for Aspiring International Activities of Engineering Students
Sato, Takashi,Sakamoto, Shuichi,Shimizu, Tadaaki,Suzuki, Takamasa,Ikeda, Hideki,Hopf, Anja,Goto, Yasushi,Oka, Tetsuo,Sasaki, Tomohiro,Narumi, Takatsune Korean Society for Engineering Education 2014 공학교육연구 Vol.17 No.4
The Faculty of Engineering, Niigata University, Japan, obtained the scholarship in "Short-Stay and Short-Visit scholarship programs(SS-SV programs)" for both German and Japanese students in 2011 and 2012. Our short-term student exchange programs proved that a short-term stay in a foreign country worked as an initiator for the students' interest and it strengthen their will to study further more in foreign countries.
International Exchanges for Aspiring Students in Engineering Field
Takashi Sato,Shuichi Sakamoto,Tadaaki Shimizu,Hideki Ikeda,Tetsuo Oka 한국공학교육학회 2012 공학교육연구 Vol.15 No.4
In 1996, the Faculty of Engineering, Niigata University, Japan entered an era of open student-exchange with Otto-von-GuerickeUniversity Magdeburg, Germany. Thus far, more than 50 of our students have devoted anywhere from three months, to an entire year of their courses, to collaborative efforts with fellow students, (-and some cases, the local citizenry) -in their native environment experiencing unfamiliar education systems and cultures.
Short-Term Student Exchanges for Aspiring International Activities of Engineering Students
Takashi Sato,Shuichi Sakamoto,Tadaaki Shimizu,Takamasa Suzuki,Hideki Ikeda,Anja Hopf,Yasushi Goto,Tetsuo Oka,Tomohiro Sasaki,Takatsune Narumi 한국공학교육학회 2014 공학교육연구 Vol.17 No.4
The Faculty of Engineering, Niigata University, Japan, obtained the scholarship in “Short-Stay and Short-Visit scholarshipprograms(SS-SV programs)” for both German and Japanese students in 2011 and 2012. Our short-term student exchange programsproved that a short-term stay in a foreign country worked as an initiator for the students' interest and it strengthen their will tostudy further more in foreign countries.
Kazuaki Yamagiwa,Yuji Tanabe,Shuji Harada,Tadaaki Shimizu,Tetsuo Oka 한국공학교육학회 2012 공학교육연구 Vol.15 No.5
Faculty of engineering, Niigata University has been executing start-up engineering education programs for the first-year students to educate his or her ability to solve engineering problems. They are divided into teams and tackle a task that they expect to easily accomplish. The expected results are hardly obtained. Then they try to seek the gap between the results and their knowledge. They analyze the phenomena and improve the approach. They evaluate the results of second trial and the effectiveness of the measures. That is, the project requires so-called PDCA cycles for students to solve engineering problems. The start-up engineering project is one of the compulsory subjects and seven departments have given the students several tasks based on their technicality. The students exchange their knowledge, ideas and learn how to use knowledge to solve the problems. Their reports and questionnaire survey proved that the projects are highly effective to improve his or her ability to solve engineering problems and give them strong motivation to learn engineering. We introduce the some tasks and the outcomes of the projects set by seven departments; mechanical and production engineering, electrical and electronic engineering, information engineering, biocybernetics, chemistry and chemical engineering, civil engineering and architecture, and material science and engineering.
Sato, Takashi,Wisweh, Lutz,Sakamoto, Shuichi,Shimizu, Tadaaki,Ikeda, Hideki,Oka, Tetsuo,Tanabe, Yuji Korean Society for Engineering Education 2010 공학교육연구 Vol.13 No.5
We report about the international cooperative activities for the engineering education between a German University and a Japanese University. After the experiences for 15 years of cooperation, both in research and student exchange, we learned a lot about the differences between these two educational systems. This report summarizes the differences and the future perspective for the improvement of engineering education based on the understanding of the differences, including advantages and disadvantages, between two educational systems.
Takashi Sato,Lutz Wisweh,Shuichi Sakamoto,Tadaaki Shimizu,Hideki Ikeda,Tetsuo Oka,Yuji Tanabe 한국공학교육학회 2010 공학교육연구 Vol.13 No.5
We report about the international cooperative activities for the engineering education between a German University and a Japanese University. After the experiences for 15 years of cooperation, both in research and student exchange, we learned a lot about the differences between these two educational systems. This report summarizes the differences and the future perspective for the improvement of engineering education based on the understanding of the differences, including advantages and disadvantages, between two educational systems.
Reforming Tar from Biomass Gasification using Limonite and Dolomite as Catalysts
Kim, Hee-Joon,Kunii, Hiroo,Li, Liuyun,Shimizu, Tadaaki,Kim, Lae-Hyun The Korean Society for Energy 2011 에너지공학 Vol.20 No.4
In this study, Catalytic reforming with vapor and biomass gasification was simultaneously performed in a same fixed bed reactor at $600-800^{\circ}C$. Light gases were produced from reformation of the tar (fuel gases) in biomass gasification by using limonite and dolomite, as catalysts. Hydrogen and carbon dioxide are main components in light gases. Hydrogen yields increased with temperature increasing in the range of $650-800^{\circ}C$, because the water shift reaction was promoted by catalyst. The yield of hydrogen gas was increased about 160% under catalyst with the mixture of limonite and dolomite comparing to limonite only.