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Analog MOS Curcuits for Motion Detection and Object Tracking Based on Biological Systems
YONEZU, Hiroo,ASAI, Tetsuya,OHTANI, Masahiro,OHSHIMA, Naoki 경북대학교 센서기술연구소 1998 센서技術學術大會論文集 Vol.9 No.1
We propose simple analog MOS circuits with a correlation model based on the insect motion detectors aiming at the realization of fundamental motion-sensing systems. The model makes the circuit structure quite simple, compared with conventional velocity sensing circuits. SPICE simulation results indicate that the proposed circuits compute local velocities of the moving light spot and have direction selectivity for the spot. The spot was tracked by compensating background images.
일본인(日本人) 종군기자(從軍記者)의 한국전쟁(韓國戰爭) 보도(報道)와 그 성격(性格)
요네즈토쿠야 ( Yonezu Tokuya ) 서울대학교 국사학과 2016 韓國史論 Vol.62 No.-
This article explores the Korean War, Japanese perspectives toward Korea, and the Korean society at large, by examining Japanese war correspondents and their reports in newspapers such as Asahi Shimbun and Mainichi Shimbun. July of 1951. Japanese war correspondents were sent to Korea when the war reached a stalemate and the armistice negotiation began. They were the first Japanese journalists to visit the Korean peninsula since Korea``s Liberation in 1945. Though their articles were strictly censored by US inspectors, they introduced various details about the war, such as the social milieu in Korea and popular sentiments and feelings toward Japan. Japanese reporters explored the ruined streets of Seoul, and found the abjectness of war and traces of Colonial Joseon. Meanwhile, they actively interacted with Koreans, and shared detailed reports with the Japanese readership, covering topics ranging from anticommunist sentiments, Koreans`` views on the Japanese laced memories of the Colonial rule, mixed feelings of expectations for and wariness toward Japan``s rearmament, and hopes about future Korea-Japan relations. The activities of Japanese war correspondents have, largely, disappeared into oblivion since in both Japan and Korea, but their reports illuminate Koreans`` view toward Japan at the time, foreshadowing the Korea-Japan treatise and its focus on resisting communist forays while securing economic aid without properly acknowledging the historical legacy of the Colonial rule.
40X40 픽셀 어레이 CMOS 실리콘 망막칩의 설계 및 제조
김종문,김호운,신장규,히로오 요네즈 경북대학교 센서기술연구소 1998 센서技術學術大會論文集 Vol.9 No.1
In this research, we have designed and fabricated a 40X40 pixel array retina chip which performs edge extraction by using CMOS standard process. The functions of photoreceptors, horizontal cells and bipolar cells have been implemented with semiconductor devices and circuits. In previous retina chips, spatial smoothing of input image has been implemented by resistive networks, which occupy a large chip area with a reduced area for effective photosensing due to a large number of required metal wires for interconnection. In this research, we have fabricated a retina chip which simplifies the wiring between pixels by using distributed-MOSFETs.
Goto Yuta,Kato Kenji,Yagi Kiyoshi,Kawaguchi Yohei,Yonezu Hiroki,Koshimae Tomoko,Waguri-Nagaya Yuko,Murakami Hideki,Suzuki Nobuyuki 대한척추외과학회 2023 Asian Spine Journal Vol.17 No.6
Study Design: This experimental study was performed using human ligamentum flavum–derived cells (HFCs).Purpose: To investigate the intracellular signaling mechanism of interleukin-6 (IL-6) secretion in transforming growth factor-β (TGF- β)-stimulated HFCs.Overview of Literature: Lumbar spinal stenosis (LSS) is a prevalent disease among the elderly, characterized by debilitating pain in the lower extremities. Although the number of patients with LSS has increased in recent years, the underlying pathomechanism remains unclear. Clinical examinations typically rely on magnetic resonance imaging to diagnose patients, revealing ligamentum flavum hypertrophy. Some studies have suggested an association between ligamentum flavum hypertrophy and inflammation/fibrosis, and expression of TGF-β and IL-6 has been observed in surgically obtained ligamentum flavum samples. However, direct evidence linking TGF-β and IL-6 expression in HFCs is lacking.Methods: HFCs were obtained from patients with LSS who had undergone decompression surgery. The cells were stimulated with TGF-β and pretreated with either the p38 mitogen-activated protein (MAP) kinase inhibitor SB203580 or the p44/42 MAP kinase inhibitor FR180204. IL-6 secretion in the cell culture medium and IL-6 messenger RNA (mRNA) expression levels were analyzed using an enzyme-linked immunoassay and real-time polymerase chain reaction, respectively.Results: TGF-β administration resulted in a dose- and time-dependent stimulation of IL-6 release. Treatment with SB203580 and FR180204 markedly suppressed TGF-β–induced IL-6 secretion from HFCs. Moreover, these inhibitors suppressed IL-6 mRNA expression in response to TGF-β stimulation.Conclusions: Our findings indicate that TGF-β induces IL-6 protein secretion and gene expression in HFCs through the activation of p38 or p44/42 MAP kinases. These results suggest a potential association between IL-6–mediated inflammatory response and tissue hypertrophy in LSS, and we provide insights into molecular targets for therapeutic interventions targeting LSS-related inflammation through our analysis of the MAP kinase pathway using HFCs.
Smooth pursuit eye movement system using artificial retina chip and shape memory alloy actuator
Kim, Won-Cheol,Kim, Jung-Hwan,Lee, Minho,Shin, Jang-Kyoo,Yang, Hyun-Seung,Yonezu, H. IEEE 2005 IEEE Sensors Journal Vol.5 No.3
We developed a new active vision system using an artificial retina chip and the shape memory alloy actuator. A foveated CMOS retina chip for edge detection designed and fabricated for an image sensor of the developed system and the shape memory alloy actuator was used for mimicking the roles of the ocular muscles to track a desired target. Also, we proposed a new computational model that mimics the functional roles of our brain organs for generating the smooth pursuit eye movement. In our model, a neuromorphic model for the medial temporal cell generates motion energy, and the medial superior temporal cell is considered to generate an actuating signal so that the developed active vision system smoothly pursues the target with similar dynamics to the motion of our eyeball during the smooth pursuit. Experimental results show that the developed system successfully operates to follow the edge information of a moving object.