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Kazuki Hashimoto,Tohru Kamiya,Kazue Yoneda,Fumihiro Tanaka 제어로봇시스템학회 2021 제어로봇시스템학회 국제학술대회 논문집 Vol.2021 No.10
Today, cancer is the number one cause of death in Japan, and cancer accounts for 27.3% of all deaths number. The development of cancer by repeating metastasis, hence it is important to operate early detection and early treatment. The diagnosis of cancer includes various treatments, but it is difficult to judge whether cancer is metastatic or not. Then, analysis of Circulating Tumor Cells (CTCs) in blood has been attracting attention as a new biomarker. However, because the ratio of CTCs in a billion blood cells is only a few, and there is a concern that the burden on doctors will increase. We propose a method for automatic identification of CTCs from fluorescence microscopy images to enable quantitative analysis by computer for the diagnosis of CTCs in blood. First, after detecting the cell candidate regions mainly by filtering, we set the region of interest in the cell candidate regions and reconstruct the region of interest by cutting out the cell nucleus region. In this paper, we applied the proposed method to 5,040 images of 6 samples and conducted experiments on the identification of CTCs. As a result, the number of detections was 148( = 100%) and the number of over-detected non-CTCs was 988.
Improvement of Human-Object Observation System
Kazuki YOKOI,Mihoko NIITSUMA,Hideki HASHIMOTO 제어로봇시스템학회 2009 제어로봇시스템학회 국제학술대회 논문집 Vol.2009 No.8
In this paper, we will present an improved system which observes human activities. We have tried to describe the activities by objects usage because there are so many kinds of objects in environments and people use them to accomplish their activities. Therefore, by observing objects we can extract more information about activities of human and this may help us to estimate what people are doing in the space. Methods to obtain objects usage are explained and improved in this paper. We also evaluated the system from experiments.
Flight Control Simulators for Unmanned Fixed-Wing and VTOL Aircraft
Naoharu Yoshitani,Shin-ichi Hashimoto,Takehiro Kimura,Kazuki Motohashi,Shoh Ueno 제어로봇시스템학회 2009 제어로봇시스템학회 국제학술대회 논문집 Vol.2009 No.8
Flight control simulators for fixed-wing air craft and VTOL(VerticalTake-offandLanding) air craft have been developed for understanding flight control dynamics and for improving control strategies and performances. They simulate automatic control of a flight path of the aircraft, using six-degree-of-freedom nonlinear equation store present aircraft dynamics. The control system is multi-layered. For fixed-wing aircraft, it consists of flight-path controller, heading and flight-path angle controller, acceleration controller and attitude controller. The control strategy is based on ’required acceleration’, proposed by the first author. On the other hand, the VTOL aircraft is of ducted-fantype. It has apropeller at the top of the duct, fixed vanes below it to cancel the counter torque of the propeller, and control vanes to control the attitude. The simulators have proved effective in testing and improving aircraft control strategies.