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Kanako Tsushima,Satoshi Ogasawara,Koji Orikawa,Masatsugu Takemoto,Kenji Koyama 전력전자학회 2019 ICPE(ISPE)논문집 Vol.2019 No.5
This paper deals with electromagnetic interference radiated from air-conditioner piping that acts as an antenna and emits electromagnetic noise. The current distribution on the piping is measured by using a near-field magnetic probe, and the distribution mode is analyzed. The results show that the piping resonates at the frequencies where the piping length accords with λ/4, 3λ/4, and 5λ/4, and radiates electromagnetic noise as a monopole antenna. This radiation mechanism is confirmed by simulations using the CST EMC Studio electromagnetic field simulator.
Michiko Tsushima,Jun Liu,Wataru Hirao,Hiromi Yamazaki,Hirofumi Tomita,Ken Itoh 대한약학회 2020 Archives of Pharmacal Research Vol.43 No.3
Nrf2 regulates redox homeostasis in cells bycoordinately regulating a range of antioxidant enzymes andproteins. An increase in oxidative stress is one of the hallmarksof aging, and Nrf2 protein levels and activity decreasewith aging. Decreased mitochondrial functions, such asdecreased ATP production, also occur with aging, leadingto the increased generation of reactive oxygen species (ROS)and oxidative stress. Thus, understanding the relationshipsbetween Nrf2 and the mitochondria is important for clarifyingthe regulatory mechanisms of aging. It is becomingclear that Nrf2 is activated in a tissue-specific manner inresponse to mitochondrial or NADPH oxidase-generatedROS. As the heart consists of postmitotic cells that utilizeATP produced mainly by mitochondrial oxidative phosphorylation,cardiomyocytes are equipped with highly sophisticatedmitochondrial quality control mechanisms. Consistentwith these findings, it has been reported that Nrf2 inthe heart is regulated via a specific translational mechanismand that Nrf2 activation confers cardioprotective effects invarious disease models. Thus, Nrf2 is a promising target foranti-aging strategies to combat age-related heart diseases,such as age-related cardiomyopathy.
Efficiency of Phototransduction Cascade in Carp Cones
Tachibanaki, Shuji,Tsushima, Sawae,Kawamura, Satoru Korean Society of Photoscience 2002 Journal of Photosciences Vol.9 No.2
In the vertebrate retina, rods mediate twilight vision and cones daylight vision. Rods have been purified easily from the retina, and thus the phototransduction mechanism in rods is now well documented. However, it has not been possible to purify cones in large quantities, and therefore, the knowledge on the mechanism in cones is limited. Here we report purification of carp (Cyprinus carpio) cones with a stepwise Percoll gradient. Using purified cells, we compared the phototransduction mechanism between rods and cones. The results showed that both transducin activation and phosphodiesterase activation are less effective, and visual pigment phosphorylation is faster in cones. These differences explain lower light-sensitivity and briefer photoresponse time course in cones.
Research Articles : Peptides from Bombyx Fibroin Counter D-Galactose-induced Hair Aging in Mice
( Kei Ichiro Yamamoto ),( Masaaki Tsushima ),( Atsushi Yoshida ),( Mayumi Karimazawa ),( Osamu Nagasuna ),( Michimasa Uchidate ),( Akira Iwabuchi ),( Masanobu Goryo ),( Tetsuro Yamashita ),( Koichi Su 한국잠사학회 2011 International Journal of Industrial Entomology Vol.23 No.2
Using proteases, we produced a peptide mixture from fibroin of the silkworm Bombyx mori. Mice received D-galactose by subcutaneous injection for 8 weeks to accelerate aging, and then received the peptide mixture orally for 7 weeks. In the mice aged with D-galactose, the coefficient of friction of hair increased significantly up to 1.6-fold, but in the mice subsequently given the peptide mixture, it was normal. Scanning electron microscopy showed improved hair cuticles in the latter mice too. These results indicate that oral administration with peptides from Bombyx fibroin counters the aging of hair cuticles.
SOCIO-ECONOMIC AND BIOLOGICAL FACTORS OF FAMILIES FROM POLAND. JAPAN, SOUTH KOREA, AND BULGARIA
TOMONARI,KYUTOKU,LIOCHEVA,VLAIKA,TSUSHIMA,SEIZO,CHUNG,SO YOUNG,WOLANSKI,NAPOLEON,JANUSZKO,LEONARD 忠南大學校體育科學硏究所 1988 體育科學硏究誌 Vol.6 No.1
The purpose of this study is to present relations between socioeconomic and biological features of families in various urban and rural population of different sites, representing different socio-economic systems and even different anthropological types. The subjects for the study are 14 different populations from poland, Japan, South Korea, and Bulgaria. We used correlation matrix for the analysis to examine interrelations between education or income and body height, or education and income and other vaiables. We also applied factorial analysis to obtain uncorrelated family factors. We investigated only four principal components in every population to facilitate comparisons between various populations. The populations examined are characterized by the following extreme magnitudes of properties of families : in South Korea, a small number of family members are gainfully employed, and there is a large number of family members per person employed : in Japan, the level of education of the population is high, the apartments have many rooms, the density of occupancy is low, the people are short: in Bulgaria, the people are tall, the differentiation of incomes is small: in Poland : the level of education of the population is high, the families are small, the density of occupancy of apartments in low, the people are tall. Approximately 70% of common Variances are due to family features in population. Awareness and genetic factors of spouses are linked with income and employment.
Aeroservoelastic Characteristics of a Corrugated Morphing Control Surface
Kensuke Soneda,Natsuki Tsushima,Tomohiro Yokozeki,Taro Imamura 한국항공우주학회 2022 International Journal of Aeronautical and Space Sc Vol.23 No.4
Aeroservoelastic characteristics of a morphing control surface with corrugated structures are investigated in this paper. The finite element structural model and the aerodynamic model with an unsteady vortex lattice method are used to analyze the aeroelastic response of a corrugated morphing control surface. The equation of motion for the corrugated morphing control surface is derived in the state-space form, and a classic LQR control technique is integrated to function the morphing structures as control surfaces. Considering the structural and control design parameters, the aeroservoelastic response of corrugated morphing control surfaces under continuous gusts is analyzed. Simulation results demonstrate that the flexible design of corrugations may lead to undesirable vibrations even with actuation control. It is also shown that the structural modes which play important roles in the lift control can change according to the structural design parameters. This work provides important insights into designing a morphing control surface with flexible structures such as corrugated structures.
LASER ABLATION OF Bi - SUBSTITUTED GADOLINIUM IRON GARNET FILMS WITH LARGE FARADAY ROTATION
N.Watanabe,K.Tsushima 한국자기학회 1995 韓國磁氣學會誌 Vol.5 No.5
Bi-substituted gadolinium iron garnet films were deposited on GGG(111) and NGG(111) substrates by irradiating KrF excimer laser onto targets having compositions of Bi_xGd_(3-x)Fe_5O₁₂ (2.0 ≤ x ≤ 3.0) under substrate temperature of 580~620℃. Analysis on structure, composition and angle of Faraday rotation, θ_F, were carried out. The composition, the structure and the magneto-optical properties of the obtained films were found to be strongly dependent both on the compositions of the targets and on the pressure of oxygen. Before annealing in air, all films showed θ_F≥ 0 at λ=6328Å, while several films showed θ_F≥ 0 after the annealing. The highest value of Bi-substitution up to x = 1.76 with uniform composition was obtained.
Hybrid Capacitors Using Organic Electrolytes
Morimoto, T.,Che, Y.,Tsushima, M. The Korean Electrochemical Society 2003 한국전기화학회지 Vol.6 No.3
Electric double-layer capacitors based on charge storage at the interface between a high surface area activated carbon electrode and an electrolyte solution are characterized by their long cycle-life and high power density in comparison with batteries. However, energy density of electric double-layer capacitors obtained at present is about 6 Wh/kg at a power density of 500W/kg which is smaller as compared with that of batteries and limits the wide spread use of the capacitors. Therefore, a new capacitor that shows larger energy density than that of electric double-layer capacitors is proposed. The new capacitor is the hybrid capacitor consisting of activated carbon cathode, carbonaceous anode and an organic electrolyte. Maximum voltage applicable to the cell is over 4.2V that is larger than that of the electric double-layer capacitor. As a result, discharged energy density on the basis of stacked volume of electrode, current collector and separator is more than 18Wh/l at a power density of 500W/l.