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Materials Sciences and Applications 2013年第6期4卷 1-4页

作者： Akito fukuda Masaya Ichimura Department of Engineering Physics Electronics and Mechanics Nagoya Institute of Technology Nagoya Japan

To fabricate a heterostructure solar cell using environmentally friendly materials and low cost techniques, tin oxide (SnO2) and cuprous oxide (Cu2O) were deposited by the sol-gel method and the electrochemical deposition, respectively. The SnO2 films were deposited from a SnCl2 solution containing ethanol and acetic acid. The Cu2O films were deposited using a galvanostatic method from an aqueous bath containing CuSO4 and lactic acid at a temperature of 40°C. The Cu2O/SnO2 heterostructure solar cells showed rectification and photovoltaic properties, and the best cell showed a conversion efficiency of 6.6 × 10-2 % with an open-circuit voltage of 0.29 V, a short-circuit current of 0.58 mA/cm2, and a fill factor of 0.39.

关键词： Sol-Gel Deposition Electrochemical Deposition Cu2O SnO2 Solar Cell

Czochralski growth of large diameter and long Al2O3 single crystals

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Endophytic Fungi Associated with a Holoparasitic Plant, Balanophora japonica (Balanophoraceae)

第十六届全国晶体生长与材料学术会议

作者： Tsuguo fukuda Tohoku University fukuda Crystal Laboratory Co. Ltd.Aoba-kuSendai Japan

The sales of Sapphire substrates for LED devices are over 50 billion Japanese Yen and Commercial methods for industrialization are EFG,KY and *** recent progress of epitaxial technique allows us to supply 6 inch wafer...

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American Journal of Plant Sciences 2016年第1期7卷 152-158页

作者： Hideko Ikeda Tatsuya fukuda Jun Yokoyama Graduate School of Science and Technology Yamagata University Yamagata Japan Department of Forestry Faculty of Agriculture Kochi University Nankoku Japan Department of Biology Faculty of Science Yamagata University Yamagata Japan Institute for Regional Innovation Yamagata University Yamagata Japan

Holoparasitism is a special life cycle of flowering plants. All carbon resources are provided by photosynthetic host plants. A recent study revealed the presence of endophytic fungi in holoparasitic plants, but their ecological and evolutionary roles are still unknown. In this study, we examined endophytic fungi isolated from the holoparasitic plant Balanophora japonica (Balanophoraceae), collected from Kochi, Shikoku in western Japan. We isolated 23 fungal strains on inflorescences and tubers from three B. japonica plants at two locations and on one sample of the host plant (Symplocos lancifolia, Symplocaceae). Predominant isolates were Trichoderma-Hypocrea, Penicillium and Phialemonium. The first group was also predominant in the host plant. Fungal composition revealed in this study differed from the composition on B. harlandii or other root holoparasites with endophytic fungal (Rafflesia cantleyi) data. Those differences might be caused by various factors, including growth habits, location, phylogenetic position or host-parasite relationship.

关键词： Balanophoraceae Balanophora japonica Endophytic Fungi Holoparasitic Plant Symplocos lancifolia Western Japan

Hypernuclear physics with single- and double- charge exchange reactions

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Isoflavone Aglycones and Oligopeptides in Lactic Acid-Fermented Soy Milk Differentially Regulate Lipid Metabolism-Related Gene Expression

The 6th China-Nuclear Physics Symposium

作者： Tomokazu fukuda Osaka Electro-Communication Univ.

We propose studies on A -hypernuclei with Charge-Exchange (CX) reactions Proposal of experiments (at Day-1) Exp.1: Production of neutron-rich hypernuclei Λ9He Λ6 H Production of exotic

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Food and Nutrition Sciences 2016年第11期7卷 989-1009页

作者： Maki Kobayashi Shintaro Egusa Mitsuru fukuda Department of Nutritional Management School of Health Science Hyogo University Kakogawa Japan Research Institute Marusan-Ai Co. Ltd. Okazaki Japan Research Institute for Nutrition Sciences Mukogawa Women’s University Nishinomiya Japan

We previously investigated the physiological effect of an ethanol extract of fermented soymilk on rats and clarified that this extract modulated their hepatic lipid metabolism. Although the soy isoflavones and oligopeptides are representative functional components of the ethanol extract, it remained unclear whether these substances share a role in lipid metabolism modulation. Therefore, we attempted to clarify the effects of isoflavones and oligopeptides in lactic acid-fermented soymilk on lipid metabolism-related gene expression in rats and HepG2 cells. The fermented soymilk extract had a higher isoflavone aglycone content than the soymilk extract. Sevenweek-old male Sprague-Dawley rats were fed an AIN-93G diet, a diet plus 70% soymilk ethanol extract, or a diet plus 70% fermented soymilk ethanol extract for 5 weeks. Although both the soymilk and fermented soymilk ethanol extracts did not significantly affect plasma and hepatic lipid profiles, the expression levels of the genes encoding CYP7a1 and SREBP-2 were significantly upregulated in the livers of rats fed with the fermented soymilk extract. Whereas isoflavone aglycones upregulated CYP7a1-encoding gene expression in HepG2, oligopeptides in soymilk and fermented soymilk downregulated this expression. Oligopeptides in fermented soymilk downregulated the expression stronger than that observed with soymilk. On the other hand, no significant change in FAS expression was observed in the livers of rats fed the fermented soymilk extract. Although isoflavone aglycones did not affect FAS expression in HepG2 cells, oligopeptides in fermented soymilk downregulated FAS expression. The downregulation of FAS with oligopeptides from fermented soymilk was stronger than that from soymilk. In the present animal experiment, the effect on reduction of fat synthesis was not found because of insufficient amount of peptides derived from digestion of soy protein. These results suggest that isoflavone aglycones increase CYP7a1 gene exp

关键词： Isoflavone Oligopeptide Fermented Soymilk Lipid Metabolism

OFDM System Implementation in DSP Platform TMS320C6678

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Journal of Computer and Communications 2016年第11期4卷 26-36页

作者： Rafael Masashi fukuda Taufik Abrão Department of Electrical Engineering (DEEL) Londrina State University (UEL) Londrina Brazil

The Orthogonal Frequency Division Multiplexing (OFDM) system is already used in commercial applications and is capable to deal with Intersymbolic Interference (ISI) caused by multipath channels. This system gained popularity after the application of the Fast Fourier Transform (FFT) and its inverse (IFFT) to modulate the signal in many subcarriers. This paper discusses implementation aspects of an OFDM system;such system is characterized by considering real constraints, including the memory consumption and the processing time. The OFDM modulator, channel samples and OFDM demodulator were implemented entirely in the DSP TMS320C6678 platform. As a proof-of-concept, a 256-QAM OFDM BER performance is compared with theoretical values. Moreover, the memory size is not demanding, consuming very few resources. It was observed a very high number of DSP clock cycles needed for the OFDM signal modulation, corresponding to more than 4 times the number used in demodulating the signal.

关键词： OFDM DSP Platform Implementation Bit Error Rate Signal Processing Telecommunication Systems

Impedance Spectroscopy for Annealing-Induced Change of Molybdenum Oxide in Organic Photovoltaic Cell

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Advances in Materials Physics and Chemistry 2017年第8期7卷 323-333页

作者： Toshifumi Kobori Norihiko Kamata Takeshi fukuda Canon Electronics Inc. Saitama Japan Department of Functional Materials Science Saitama University Saitama Japan

Organic photovoltaic cells (OPVs) have been investigated for a long time, and practical realizations have been also in progress due to their high photovoltaic performance over 12%. In this study, we fabricated normal OPVs and investigated the reason of an improved optical-to-electrical conversion efficiency by annealing the MoOx layer. The photoconversion efficiency was improved up to 5.65% from 2.05% after annealing at 160°C for 5 min, and the external quantum efficiency also increased for all the measurement wavelength ranging from 300 to 900 nm. Especially, the short circuit current density increased among photovoltaic parameters. The carrier transport resistance of photoactive layer was found to be reduced by evaluating the impedance measurement. These results indicate that defects at the MoOx/organic interface were successfully reduced by the thermal annealing process of MoOx layer. The efficient carrier transport was realized for the annealed-device, resulting in the high device performance. In addition, the relaxation and electron recombination times were also reduced by the annealing process, which lead to the improved photovoltaic performance.

关键词： Organic Photovoltaic Cells PTB7-Th MoOx Annealing Impedance Spectroscopy

Study on the Style of Urban Development as a Center of Kitakyushu Monorail —About the User Actual Situation and the Demographic around the Station

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Open Journal of Civil Engineering 2014年第4期4卷 318-327页

作者： Yuanwen Zhang Hiroatsu fukuda Tianyi Yu Faculty of Environmental Engineering University of Kitakyushu Kitakyushu Japan School of Architecture and Fine Art Dalian University of Technology Dalian China

The ageing of the population in Japan has become a problem. According to the research of different regions, where the ratio of the ageing population is above 25%, it is found that the Japanese society is gradually turned to hyper-aged society. The population along Kitakyushu monorail is also in such a situation. This study is based on the background, with excessive reliance on their own vehicles and public transport problems arising from the abolition of public transportation in Kitakyushu as the area of this study. Under the full consideration of people who can’t drive, the elderly who had to take buses as well as people who lack of transport ability where population decrease and the aging problem have been worsening, their surrounding environment should be further improved. In addition, it should be taken into consideration to increase the population in the walking distance around the stations.

关键词： Monorail Population Hyper-Aged Society Aging Ratios

Unsteady Flow Condition between Front and Rear Rotor of Contra-Rotating Small Sized Axial Fan

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Open Journal of Fluid Dynamics 2017年第3期7卷 371-385页

作者： Toru Shigemitsu Hiroaki fukuda Katsuhiko Hirosawa Institute of Science and Technology Tokushima University Tokushima Japan Graduate School of Advanced Technology and Science Tokushima University Tokushima Japan

Contra-rotating small-sized axial fans are used as cooling fans for electric equipment. In the case of the contra-rotating rotors, the blade row distance between front and rear rotors is a key parameter for the performance and stable operation. The wake and potential interference occur between the front and rear rotors and leakage flow from the front rotor tip influences on the flow condition of the rear rotor near the shroud when the blade row distance is small. Therefore, it is important to clarify the flow condition between front and rear rotors. The fan static pressure curves were obtained by the experimental apparatus and the numerical analysis was also conducted to investigate the internal flow between front and rear rotors. The leakage flow from the front rotor tip reaches the leading edge of the rear rotor when the blade row distance is small as L = 10 mm and the pressure fluctuations at the leading edge of the rear rotor tip becomes larger than those at other radial positions. In the present paper, the vorticity contour between front and rear rotors is shown and pressure fluctuations related to the leakage flow from the front rotor is investigated using the numerical analysis result. Then, suitable blade row distance for the contra-rotating small sized axial fan is discussed based on the internal flow condition.

关键词： Turbomachinery Contra-Rotating Axial Flow Fan Leakage Flow Wake

Metabolite Profile of Lactic Acid-Fermented Soymilk

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Food and Nutrition Sciences 2018年第11期9卷 1327-1340页

作者： Maki Kobayashi Tomoyo Shima Mitsuru fukuda Department of Nutrition School of Nutrition Kobegakuin University Kobe Japan Research Institute Marusan-Ai Co. Ltd. Okazaki Japan Research Institute for Nutrition Sciences Mukogawa Women’s University Nishinomiya Japan

Isoflavone aglycone-rich soymilk fermented by Lactobacillus delbrueckii subsp. delbrueckii, strain TUA-4408L (F4408) has stronger lipid metabolism-modulating effects than isoflavone aglycone-poor soymilk fermented by Lactobacillus delbrueckii subsp. delbrueckii, strain TUA-4404L (F4404). As such, fermentation products other than isoflavone aglycones may also exert lipid metabolism-modulating effects. Therefore, the present study aimed to compare the metabolites in soymilk (SM), F4404, and F4408 via a metabolomics approach. Various aglycones including isoflavones, flavones, flavonols, and flavanones increased in both F4404 and F4408 compared with SM. The increases in isoflavone and flavanone aglycones were greater in F4408 than in F4404. Some types of dipeptides and free amino acids, especially ornithine, increased in both fermented soymilks. The increase in free amino acids, especially ornithine, was higher in F4408 than in F4404. Thus, F4408 exhibited stronger glycosidase and protease activities than F4404. Functional components produced by lactic acid fermentation are known to improve lipid metabolism. Therefore, it is suggested that not only isoflavone aglycones but also other functional components exert lipid metabolism-modulating effects in fermented soymilks, especially soymilk fermented using TUA-4408L.

关键词： Fermented Soymilk Metabolite Polyphenol Aglycone Ornithine