Publish in OALib Journal

ISSN: 2333-9721

APC: Only $99


Any time

2019 ( 12 )

2018 ( 15 )

2017 ( 12 )

2016 ( 23 )

Custom range...

Search Results: 1 - 10 of 1348 matches for " Masayuki Kamei "
All listed articles are free for downloading (OA Articles)
Page 1 /1348
Display every page Item
Self Assembly of Honeycomb TiO2 Coatings by Tea-Leaf Extracts as the Dispersoids  [PDF]
Masayuki Kamei
World Journal of Condensed Matter Physics (WJCMP) , 2011, DOI: 10.4236/wjcmp.2011.13010
Abstract: Photo catalytic TiO2 coatings with well defined honeycomb structure were successfully self-assembled on glass substrates by a simple “dip and burn solgel method“. The crux of this new method is that the starting material for the sol-gel coating (the water solution of ammonium titanium citrate) was “doped” with “tea-leaf extracts”. Tea-leaf extracts were completely dissolved in the water solution of ammonium titanium citrate and nucleate uniformly during the drying procedure of the coating precursor formation. This uniformly dispersed nucleation of the “tea-leaf extracts (tannin, catechin…)” were extracted during calcinations and leaving honeycomb-cell like nano-structure in the TiO2 coatings. Self-assembled cells were uniformly distributed in the TiO2 coatings and the diameter of the cells was in the range of 200 - 1000 nm. Fine honeycomb structures were clearly observed with microscopic observations.
Sensitive and Reproducible Photocatalytic Activity Evaluation Instrument for Transparent Coatings  [PDF]
Masayuki Kamei
World Journal of Condensed Matter Physics (WJCMP) , 2012, DOI: 10.4236/wjcmp.2012.21008
Abstract: A new photocatalytic activity (PC) measurement instrument based on the measurement of the photo-induced reduction of Ag ions was proposed. The feature of this system is to perform “ultraviolet irradiation for PC activation” and “Ag film thickness determination for PC evaluation” simultaneously and automatically. Realizing a PC measurement system with high sensitivity, wide dynamic range, easy operation and reproducibility, which is especially suited for the PC measurement of the coatings on transparent substrates.
Note on a Continuum Multi-Country and International Trade  [PDF]
Keita Kamei
Theoretical Economics Letters (TEL) , 2012, DOI: 10.4236/tel.2012.22040
Abstract: We provide an analytical solution for the continuum multi-country two-sector Ricardian model of Yanagawa (1996) [1], and obtain additional results that are not observed in the standard two-country two-good Ricardian model. Increases in productivity in each sector results in an increase in the number of countries producing high technology goods and a de- crease in the number of countries producing low technology goods.
The LSH/DDM1 Homolog MUS-30 Is Required for Genome Stability, but Not for DNA Methylation in Neurospora crassa
Evelina Y. Basenko?,Masayuki Kamei,Lexiang Ji?,Robert J. Schmitz?,Zachary A. Lewis
PLOS Genetics , 2016, DOI: 10.1371/journal.pgen.1005790
Abstract: LSH/DDM1 enzymes are required for DNA methylation in higher eukaryotes and have poorly defined roles in genome maintenance in yeast, plants, and animals. The filamentous fungus Neurospora crassa is a tractable system that encodes a single LSH/DDM1 homolog (NCU06306). We report that the Neurospora LSH/DDM1 enzyme is encoded by mutagen sensitive-30 (mus-30), a locus identified in a genetic screen over 25 years ago. We show that MUS-30-deficient cells have normal DNA methylation, but are hypersensitive to DNA damaging agents. MUS-30 is a nuclear protein, consistent with its predicted role as a chromatin remodeling enzyme, and levels of MUS-30 are increased following DNA damage. MUS-30 co-purifies with Neurospora WDR76, a homolog of yeast Changed Mutation Rate-1 and mammalian WD40 repeat domain 76. Deletion of wdr76 rescued DNA damage-hypersensitivity of Δmus-30 strains, demonstrating that the MUS-30-WDR76 interaction is functionally important. DNA damage-sensitivity of Δmus-30 is partially suppressed by deletion of methyl adenine glycosylase-1, a component of the base excision repair machinery (BER); however, the rate of BER is not affected in Δmus-30 strains. We found that MUS-30-deficient cells are not defective for DSB repair, and we observed a negative genetic interaction between Δmus-30 and Δmei-3, the Neurospora RAD51 homolog required for homologous recombination. Together, our findings suggest that MUS-30, an LSH/DDM1 homolog, is required to prevent DNA damage arising from toxic base excision repair intermediates. Overall, our study provides important new information about the functions of the LSH/DDM1 family of enzymes.
Prosodically Rich Speech Synthesis Interface Using Limited Data of Celebrity Voice  [PDF]
Takashi Nose, Taiki Kamei
Journal of Computer and Communications (JCC) , 2016, DOI: 10.4236/jcc.2016.416006
Abstract: To enhance the communication between human and robots at home in the future, speech synthesis interfaces are indispensable that can generate expressive speech. In addition, synthesizing celebrity voice is commercially important. For these issues, this paper proposes techniques for synthesizing natural-sounding speech that has a rich prosodic personality using a limited amount of data in a text-to-speech (TTS) system. As a target speaker, we chose a well-known prime minister of Japan, Shinzo Abe, who has a good prosodic personality in his speeches. To synthesize natural-sounding and prosodically rich speech, accurate phrasing, robust duration prediction, and rich intonation modeling are important. For these purpose, we propose pause position prediction based on conditional random fields (CRFs), phone-duration prediction using random forests, and mora-based emphasis context labeling. We examine the effectiveness of the above techniques through objective and subjective evaluations.
Recent Research of Thorium Molten-Salt Reactor from a Sustainability Viewpoint
Takashi Kamei
Sustainability , 2012, DOI: 10.3390/su4102399
Abstract: The most important target of the concept “sustainability” is to achieve fairness between generations. Its expanding interpolation leads to achieve fairness within a generation. Thus, it is necessary to discuss the role of nuclear power from the viewpoint of this definition. The history of nuclear power has been the control of the nuclear fission reaction. Once this is obtained, then the economy of the system is required. On the other hand, it is also necessary to consider the internalization of the external diseconomy to avoid damage to human society caused by the economic activity itself, due to its limited capacity. An extreme example is waste. Thus, reducing radioactive waste resulting from nuclear power is essential. Nuclear non-proliferation must be guaranteed. Moreover, the FUKUSHIMA accident revealed that it is still not enough that human beings control nuclear reaction. Further, the most essential issue for sustaining use of one technology is human resources in manufacturing, operation, policy-making and education. Nuclear power will be able to satisfy the requirements of sustainability only when these subjects are addressed. The author will review recent activities of a thorium molten-salt reactor (MSR) as a cornerstone for a sustainable society and describe its objectives and forecasts.
Deciding nonconstructibility of 3-balls with strict spanning edges
Satoshi Kamei
Mathematics , 2011,
Abstract: In this paper, we consider constructibility of simplicial 3-balls. In many cases, examining 1-dimensional subcomplexes of a simplicial 3-ball is efficient to solve the decision problem whether the simplicial 3-ball is constructible or not. From the point of view, we consider the case where a simplicial 3-ball has spanning edges and present a sufficient condition for nonconstructibility.
Automatic structures and growth functions for finitely generated abelian groups
Satoshi Kamei
Mathematics , 2011,
Abstract: In this paper, we consider the formal power series whose n-th coefficient is the number of copies of a given finite graph in the ball of radius n centred at the identity element in the Cayley graph of a finitely generated group and call it the growth function. Epstein, Iano-Fletcher and Uri Zwick proved that the growth function is a rational function if the group has a geodesic automatic structure. We compute the growth function in the case where the group is abelian and see that the denominator of the rational function is determined from the rank of the group.
A Pure Theory of Aggregate Price Determination  [PDF]
Masayuki Otaki
Theoretical Economics Letters (TEL) , 2011, DOI: 10.4236/tel.2011.13026
Abstract: This article considers aggregate price determination related to the neutrality of money. When the true cost of living can be defined as a function of prices in an overlapping generations (OLG) model, the marginal cost of a firm depends solely on the current and future prices. Thus, the sequence of equilibrium price becomes independent of the quantity of money. Hence, money becomes non-neutral. However, when people hold the extraneous belief that prices increases proportionately with money, this belief becomes self-fulfilling as long as the increment of money and true cost of living are low enough to guarantee full employment.
The Role of Money: Credible Asset or Numeraire?  [PDF]
Masayuki Otaki
Theoretical Economics Letters (TEL) , 2012, DOI: 10.4236/tel.2012.22031
Abstract: It is well known that money is neutral if 1) people hold the extraneous belief that it is an only numeraire and does not possess intrinstic value, and 2) new money is injected into an economy as its own interest in the OLG model under perfect information (Lucas [1] Theorem (2)). We find that whenever 1) is not satisfied and money is rationally held to have substance value, money becomes non-neutral even if we use the same model as Lucas [1].
Page 1 /1348
Display every page Item

Copyright © 2008-2017 Open Access Library. All rights reserved.