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A Microgripper Using Electro-Rheological Fluid
Kazuhiro Yoshida,Toru Ide,Joon-wan Kim,Shinichi Yokota 제어로봇시스템학회 2009 제어로봇시스템학회 국제학술대회 논문집 Vol.2009 No.8
In this paper, we propose and develop a novel ER microgripper using flexible ER valves (FERVs). An FERV controls electro-rheological fluid (ERF) flow by the apparent viscosity increase due to the applied electric field. The gripper has plural arms. Each arm consists of an FERV, a movable chamber and a displacement constraint element and bends with the inner pressure controlled by the FERV. The MEMS fabrication processes for the FERV, movable chamber and displacement constraint element are developed and an arm is successfully fabricated. The characteristics of the FERV are experimentally clarified and the bending motion of the arm is demonstrated.
吉田和裕(Kazuhiro Yoshida) 대한한의학원전학회 2018 대한한의학원전학회지 Vol.31 No.3
Objectives : Donguibogam Chimgupyun has a sort of acupuncture technic in Josun called Gyejokchimbub. This Gyejok refers to the habgogja of Ling shu · guanzhen. This was conveyed to Japan as Shinkyugokuhitsuto’s Betsutsuto but it is unclear as to how this is used today. Methods : Medical texts such as Donguibogam, Huangdineijing Lingshu, Yixuegangmu, Shinkyugokuhitsuto, Sugiyamamakototsutoryu, and Shinkyusuyo were studied for this research. Results : Gyejok acupuncture is conveyed to Japan as Shinkyugokuhitsuto’s Betsutsuto but it is unclear as to how this is being used. What is similar to this technic is the Sanhoshujutsuho in hand technic’s part and Sanhohariden in Juhachijutsu’s Kuden which are shown in the chapter five of Book of Hyo. Moreover, this Sanho is Lingshu ·Guanzhen’s Qici. This was continued as Sugiyamamakototsutoryu’s Sanhoshujutsuho, but sansin in needle technic is similar to Gyejog, and it was branched out into Sanhoshujutsuho that is orally transmitted from Sanhoshiyuji as seen in the same book, Juhachijutsu’s principal treatment. Conclusions : Habgogja is a ‘Gyejog Tsuto’ originating from Gyejog technic, and Qici is Sanho originating from Santoge. They developed into Sanhohariden from Sanhoshujutsuho. This tells us how Gyejog acupuncture technic has affected East Asia.
Preoperative serum microRNAs as potential prognostic biomarkers in ovarian clear cell carcinoma
Kazuhiro Suzuki,Akira Yokoi,Kosuke Yoshida,Tomoyasu Kato,Takahiro Ochiya,Yusuke Yamamoto,Hiroaki Kajiyama 대한부인종양학회 2023 Journal of Gynecologic Oncology Vol.34 No.3
Objective: Ovarian clear cell carcinoma (OCCC) is a subtype of epithelial ovarian carcinoma with poor prognosis. However, no effective biomarkers have been established for predicting unfavorable events, including recurrence and poor prognoses. Serum microRNAs (miRNAs) have been increasingly reported to be useful in predicting a patient’s condition and have been recognized as a potentially less-invasive source for liquid biopsy in cancer. Therefore, this study aimed to evaluate serum miRNA profiles from patients with OCCC and to establish biomarker for predicting the prognoses. Methods: The GSE106817, which included preoperative serum miRNA profiles of patients with ovarian tumors, was used, and clinical information was investigated. In all, 66 patients with OCCC were included, excluding those with other histological subtypes or insufficient prognostic information. Moreover, miRNA profiles of OCCC tissues were also examined. Results: The median follow-up period was 64.3 (8.0–153.3) months. Based on multivariable Cox regression analyses and the expression of miRNAs in OCCC tissues, miR-150-3p, miR-3195, and miR-7704 were selected as miRNA candidates associated with both progression-free survival (PFS) and overall survival (OS). Then, the prognostic index was calculated based on expression values of 3 serum miRNAs. Kaplan-Meier survival analysis indicated that the prognostic index was significantly predictive of PFS and OS (p=0.004 and p=0.012, respectively). Conclusion: Preoperative serum miRNA profiles of miR-150-3p, miR-3195, and miR-7704 can be used to potentially predict the prognosis of patients with OCCC.
Zebing Mao,Kazuhiro Yoshida,김준완 대한기계학회 2019 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.33 No.2
The vertically allocated free-standing SU-8 microstructures are typically bonded to a glass cover by the usage of uncrosslinked SU-8 adhesives. Such a phenomenon can easily cause SU-8 protrusion and eventually result in the SU-8 cantilever to be immovable. Traditional methods are sensitive to the bonding conditions and have a short bondable thickness of SU-8 adhesives. In this study, we propose an approach, that is, improved structural features, to alleviate the protrusion problem while extending the bondable thickness for the freestanding SU-8 microstructures in an enclosed channel. We used concave and moat microstructures as solutions of the improved structural features. We investigated the influence of both microstructures on the bonding quality and compared the bondable thickness with the previous one. THB-151N was used in another example to demonstrate the availability of our method. The bonding quality at the interfaces was evaluated by SEM images and direct inspection through a transparent glass cover. The bonding method is advantageous to other microfluidic systems, particularly those with long narrow channels.
Structural Design of Nakanoshima Festival Tower West that Achieved High-Grade Seismic Performance
Kumano, Takehito,Yoshida, Satoshi,Saburi, Kazuhiro Council on Tall Building and Urban Habitat Korea 2017 International journal of high-rise buildings Vol.6 No.3
This paper summarizes the structural concept and design of the "Nakanoshima Festival Tower West" in Osaka, Japan, which is 200m high and has a super-high damping system. Its superstructure is mainly composed of a central core and outer tube frames. It has a bottom truss structure at the boundary between the low-rise and mid-rise sections of the building, where the column arrangement is changed. Besides, the high-rise section of the building has a neck truss structure. These truss structures smoothly transfer the axial forces of the columns and reduce the flexural deformations induced by horizontal loads. Oil dampers with extremely high damping capacity are installed in the rigid walls named the "Big Wall Frames" of the low-rise section. Moreover, many braces and damping devices are well arranged in the center core of each story. The damping effects of these devices ensure that all structural members are remain within the elastic range and that story drifts are within 1/150 in large earthquakes. This super-high damping structure in the low-rise section is named the "Damping Layer". The whole structural system is named the "Super Damping Structure". The whole structural systems enhance the building's safety, comfort and Business Continuity Planning (BCP) under large earthquakes.