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( Masanori Ito ),( Shinji Tanaka ),( Kazuaki Chayama ) 대한간학회 2021 Gut and Liver Vol.15 No.3
The prevalence of gastric cancer after eradication (GCAE) is increasing dramatically in Japan. GCAE has characteristic features, and we must understand these features in endoscopic examinations. Differentiated cancer types were frequently found after eradication and included characteristic endoscopic features such as reddish depression (RD). However, benign RD can be difficult to distinguish from gastric cancer because of histological alterations in the surface structures (nonneoplastic epithelium or epithelium with low-grade atypia [ELA]) as well as multiple appearances of RD. Recently, we clarified similar alterations in genetic mutations between ELA and gastric cancer, suggesting that ELA is derived from gastric cancer. Clinically, submucosal invasive cancer was frequently found in patients after eradication therapy even if they received annual endoscopic surveillance. We can improve the diagnostic ability using image-enhanced endoscopy with magnified observation. (Gut Liver 2021;15:338-345)
Kamiue Masanori,Tsubahara Akio,Ito Tomotaka,Koike Yasuhiro 대한재활의학회 2024 Annals of Rehabilitation Medicine Vol.48 No.3
Objective: To investigate the factors that induce strong contractions during repetitive peripheral magnetic stimulation (rPMS) and compare the muscle torque induced by two stimulators (Stim A and Stim B) with different coil properties.Methods: rPMS was applied to the right vastus lateralis of 30 healthy young adults. Stim A contained a 10.1 cm<sup>2</sup> rectangular iron core coil, while Stim B contained a 191 cm<sup>2</sup> round coil. The knee extensor torque (KET) induced by rPMS at 30 Hz was measured isometrically and divided by the maximum voluntary contraction (MVC) to obtain a relative value of MVC (%MVC). KET at 100% intensity of Stim A (A100%, 1.08 T) was compared to those at 100% or 70% intensity of Stim B (B100%, 1.47 T vs. B70%, 1.07 T). Additionally, we conducted a comprehensive literature search for studies that measured the KET during rPMS.Results: Both the mean values of %MVC using B100% and B70% were significantly greater than that using A100%. Furthermore, the KET induced by Stim B was found to be larger than that described in previous reports, unless booster units were used to directly stimulate the main trunk of the femoral nerve.Conclusion: Stim B induced a stronger muscle contraction force than Stim A did. This may be because the larger the coil area, the wider the area that can be stimulated. Additionally, a circular coil allows for deeper stimulation.
A New Concept of Diesel Engine Fuel Injection System with DDVC Hydraulic Actuator
Kyoko Narukawa,Feifei Zhang,Masanori Ito 제어로봇시스템학회 2008 제어로봇시스템학회 국제학술대회 논문집 Vol.2008 No.10
One of the most important subjects for the ship in recent years is to decrease the environmental impact by the exhaust from diesel engine. This research proposes a new composition of a simple, cheap, efficient fuel injection system by using the Direct Drive Volume Control actuator. It is well known that fuel injection pressure, injection timing and injection pattern has big influence for efficient combustion and this study shows the proposed injection system has availability to optimize those parameters.
Image processing based remote control with robot arm simulator
Jiafeng. Zhang,Feifei. Zhang,Masanori. Ito 제어로봇시스템학회 2009 제어로봇시스템학회 국제학술대회 논문집 Vol.2009 No.8
Motion estimation provides an attractive choice to cumbersome interface devices for human computerinteraction (HCI). Worthy of note, visual recognition of hand gestures can help achieving in an easy and natural way forinteraction between human and computer. The interfaces of HCI and other virtual reality systems depend on accurate,real-time hand and fingertip tracking for association between real objects and relative digital information. They costexpensively and complicated operations make them troublesome. We are developing a real-time, view-based gesture recognition system. Optical flow is estimated and segmented into motion fragments. Using artificial neural network (ANN), it can compute and estimate the motion of gesture. Comparing with the traditional approaches, theoretical andexperimental results show that this method has more simple hardware and algorithm demands but more effectiveness. It can be used in remote control system for understanding the human body languages.