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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.
An Analysis of 2D/3D Data Fusion for a Sensor Resource Reduction
Takashi Matsuzaki,Mitsuhisa Ikeda,Hiroshi Kameda 제어로봇시스템학회 2009 제어로봇시스템학회 국제학술대회 논문집 Vol.2009 No.8
In tracking flying objects using 3D sensors which observe range and angle observations such as elevation and azimuth in 3D sensor system, there may not be enough 3D sensor resources such as a number of radar and radar beams. In consequence, it it difficult to achieve desired tracking accuracy due to the lack of 3D sensor coverage, it cannot be done to achieve users’ desired tracking accuracy. Therefore, to apply 2D sensors for 3D sensor system is needed in term of filling some blank of 3D sensor coverage, and moreover it is necessary to minimize the 3D sensor resources at the same time. 2D sensor observes angle observations (elevation and azimuth). In SICE2008, we have already proposed a 2D/3D Data Fusion method for launched target. However, this method is not confirmed in any condition, for example, situation based on combination of number of sensors, the location of sensors and performance of sensors, etc. In this paper, we carried on a sensitivity analysis of tracking accuracy for various location of 2D sensor platform with different location of 3D sensors, and various sensors, etc. As the result of the computer simulations, we could confirm one or two 3D sensors with 2D sensor system are superior to three 3D sensor system in a view point of tracking accuracy.
TAKASHI SUZUKI,SHIGENOBU SHINOHARA,HIROFUMI YOSHIDA,HIROAKI IKEDA,YASUHIRO SAITOH,KEN-ICHI NISHIDE,MASAO SUMI 대한전자공학회 1992 대한전자공학회 학술대회 Vol.1992 No.10
An infrared range finder using a self-mixing laser diode (SM-LD), which has been proposed and developed by the authors, can measure not only a range of a moving target but its velocity simultaneously. In this paper, described is that the precise mode-hop pulse train can be obtained by employing a new signal processing circuit even when the backscattered light returning into the SM-LD is much more weaker. As a result, the distance to a tilted square sheet made from aluminium or white paper, which is placed 10 ㎝ through 60 ㎝ from the SM-LD, is measured with accuracy of a few percent even when the tilting angle is less than 75 degrees or 85 degrees, respectively.<br/> And in this paper, described is the range-image recognition of a plane object under the condition of standstill. The output laser beam is scanned by scanning two plane mirrors equipped with each stepping motor. And we succeeded in the acquisition of the range-image of a plane object in a few tens of seconds. Furthermore, described is a feasibility study about the range-image recognition of a slowly moving plane object.
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.
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.
Pilot Study for Considering Subthalamic Nucleus Anatomy during Stimulation Using Directional Leads
Takashi Asahi,Kiyonobu Ikeda,Jiro Yamamoto,Hiroyuki Tsubono,Shuji Sato 대한파킨슨병및이상운동질환학회 2019 Journal Of Movement Disorders Vol.12 No.2
ObjectiveDirectional leads are used for deep brain stimulation (DBS). Two of the four contacts of the leads are divided into three parts, enabling controlled stimulation in a circumferential direction. The direction of adverse effects evoked by DBS in the subthalamic nucleus (STN) and stimulation strategies using directional leads were evaluated. MethodsDirectional leads were implanted into the bilateral STN of six parkinsonian patients (1 man, 5 women; mean age 66.2 years). The contact centers were located within the upper border of the STN, and the locations were identified electrically using microrecordings. Adverse effects were evaluated with electrical stimulation (30 μs, 130 Hz, limit 11 mA) using the directional part of each lead after surgery, and the final stimulation direction was investigated. Unified Parkinson’s disease rating scale (UPDRS) scores were evaluated before and after DBS. ResultsFifty-six motor and four sensory symptoms were evoked by stimulation; no adverse effect was evoked in 14 contacts. Motor and sensory symptoms were evoked by stimulation in the anterolateral direction and medial to posterolateral direction, respectively. Stimulation in the posteromedial direction produced adverse effects less frequently. The most frequently used contacts were located above the STN (63%), followed by the upper part of the STN (32%). The mean UPDRS part III and dyskinesia scores decreased after DBS from 30.2 ± 11.7 to 7.2 ± 2.9 and 3.3 ± 2.4 to 0.5 ± 0.8, respectively. ConclusionThe incidence of adverse effects was low for the posteromedial stimulation of the STN. Placing the directional part of the lead above the STN may facilitate the control of dyskinesia.
Yuji Ikeda,Sho Sato,Akira Yabuno,Daisuke Shintani,Aiko Ogasawara,Maiko Miwa,Makda Zewde,Takashi Miyamoto,Keiichi Fujiwara,Yusuke Nakamura,Kosei Hasegawa 대한부인종양학회 2020 Journal of Gynecologic Oncology Vol.31 No.6
Objective: Maternal embryonic leucine zipper kinase (MELK) is receiving an attentionas a therapeutic target in various types of cancers. In this study, we aimed to evaluate theprognostic significance of MELK expression in ovarian cancer using clinical samples, andassessed the efficacy of a small molecule MELK inhibitor, OTS167, using patient-derivedovarian cancer cells as well as cell lines. Methods: Expression levels of MELK in 11 ovarian cancer cell lines were confirmed bywestern blotting. Inhibitory concentration of OTS167 was determined by colorimetric assay. MELK messenger RNA (mRNA) expression was evaluated in 228 ovarian cancer patients byquantitative polymerase chain reaction. Growth inhibition of OTS167 was also evaluatedusing freshly-isolated primary ovarian cancer cells including spheroid formation condition. Results: MELK mRNA expression was significantly higher in ovarian cancer than in normalovaries (p<0.001), and high MELK mRNA expression was observed in patients with advancedstage, positive ascites cytology and residual tumor size. Patients with high MELK mRNAexpression showed shorter progression-free survival (p=0.001). Expression of MELK wasalso confirmed in 10 of 11 ovarian cancer cell lines tested, and the half maximal inhibitoryconcentration of MELK inhibitor, OTS167, ranged from 9.3 to 60 nM. Additionally, OTS167showed significant growth inhibitory effect against patient-derived ovarian cancer cells,regardless of their tumor locations, histologic subtypes and stages. Conclusions: We demonstrated MELK as both a prognostic marker and a therapeutic targetfor ovarian cancer using clinical ovarian cancer samples. MELK inhibition by OTS167 may bean effective approach to treat ovarian cancer patients.
Characterizing Wooden Texture Using the Affective Engineering Approach
( Mio Ikeda ),( Takashi Toriizuka ) 한국감성과학회 2014 춘계학술대회 Vol.2014 No.-
There are a lot of furniture and building materials made of wood around us. Some people buy them to stick to tree species and characteristics. However they probably don`t have expert knowledge regarding to woods. Therefore people rely on their senses (sight, smell and touch) when choosing woods. The problems that, example, we feel like a good looking wood, but the feel is bad actually use. Furthermore, picking one of kind of woods, they confuse at large home center. I consider that an index such as the choice of wood sensuously will get to choose the wood easily. The purpose of this research is to identify impression of woods. In addition to characterize woods in term of affective (kansei) engineering. The impression evaluation were examined using fourteen woods with three conditions (sight only, without sight and all sense). The results, the yellow pine, the hinoki and the walnut were woods which everybody feel attracted, but the hard maple, the red oak and the kusu were not feel attracted from relation the level of attraction and the standard deviation. The difference of senses choosing woods made the level of attraction change. Woods which have common impression between sight, sense of touch and smell were become the high level attraction.