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Institution

University of Electro-Communications

EducationTokyo, Japan
About: University of Electro-Communications is a education organization based out in Tokyo, Japan. It is known for research contribution in the topics: Laser & Robot. The organization has 8041 authors who have published 16950 publications receiving 235832 citations. The organization is also known as: UEC & Denki-Tsūshin Daigaku.


Papers
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Journal ArticleDOI
TL;DR: In this article, a well-aligned arrays of CdS-ZnO composite nanorods were grown on indium tin oxide substrates for visible photocatalyst applications.

123 citations

Journal ArticleDOI
TL;DR: In this article, the authors report on some aspects of the sensitization of titanium dioxide nanoparticulate electrodes with CdSe QDs deposited by the so-called successive ionic layer adsorption and reaction (SILAR) method.
Abstract: Quantum dot sensitized solar cells have the potentiality to emerge as viable third-generation photovoltaic devices. In these cells, the photoanode is constituted by a nanostructured oxide layer sensitized to the visible by suitable quantum dots (QDs). Here, we report on some aspects of the sensitization of titanium dioxide nanoparticulate electrodes with CdSe QDs deposited by the so-called successive ionic layer adsorption and reaction (SILAR) method. Parallel SILAR experiments with nanoparticulate and rutile single crystal electrodes indicate that an almost full coverage of the titanium dioxide surface is achieved from the initial stages of the process. However, photoelectrochemical experiments done with both SILAR and colloidal CdSe QD sensitized electrodes indicate a faster recombination in the former case. Furthermore, a study of the ultrafast carrier dynamics of CdSe QDs by means of the near-field heterodyne detection transient grating method reveals that the rate of the photogenerated electron injec...

122 citations

Journal ArticleDOI
TL;DR: It is found that the amino acid sequence of P521 deduced from the cDNA was very similar to that of iodopsin, respectively, which gives additional strength to the transmutation theory of Walls.
Abstract: The Tokay gecko (Gekko gekko), a nocturnal lizard, has two kinds of visual pigments, P467 and P521. In spite of the pure-rod morphology of the photoreceptor cells, the biochemical properties of P521 and P467 resemble those of iodopsin (the chicken red-sensitive cone visual pigment) and rhodopsin, respectively. We have found that the amino acid sequence of P521 deduced from the cDNA was very similar to that of iodopsin. In addition, P467 has the highest homology with the chicken green-sensitive cone visual pigment, although it also has a relatively high homology with rhodopsins. These results give additional strength to the transmutation theory of Walls [Walls, G. L. (1934) Am. J. Ophthalmol. 17, 892-915], who proposed that the rod-shaped photoreceptor cells of lizards have been derived from ancestral cone-like photoreceptors. Apparently amino acid sequences of visual pigments are less changeable than the morphology of the photoreceptor cells in the course of evolution.

122 citations

Journal ArticleDOI
TL;DR: In this article, an analysis of the VLF signals radiated by ground transmitters and received on board of the French DEMETER satellite, reveals a drop of the signals (scattering spot) connected with the occurrence of large earthquakes.
Abstract: The analysis of the VLF signals radiated by ground transmitters and received on board of the French DEMETER satellite, reveals a drop of the signals (scattering spot) connected with the occurrence of large earthquakes. The extension of the "scattering spots" zone is large enough (1000–5000 km) and, probably, it increases with the magnitude of the "relative" earthquake. A possible model to explain the phenomenology, based on the acoustic gravity waves and the ionosphere turbulence, is proposed. The method of diagnostics applied to this study has the advantage to be a global one due to the world wide location of the powerful VLF transmitters and of the satellite reception. However, a specific disadvantage exists because the method requires rather a long time period of analysis due to the large longitudinal displacements among the successive satellite orbits. At the moment, at least, one month seems to be necessary.

122 citations

Journal ArticleDOI
TL;DR: In this paper, the authors examine some of the recent advances in the parametric acoustic array (PAA) since it was first applied in air in 1983 by Yoneyama.

122 citations


Authors

Showing all 8079 results

NameH-indexPapersCitations
Mildred S. Dresselhaus136762112525
Matthew Nguyen131129184346
Juan Bisquert10745046267
Dapeng Yu9474533613
Riichiro Saito9150248869
Shun-ichi Amari9049540383
Shigeru Nagase7661722099
Ingrid Verbauwhede7257521110
Satoshi Hasegawa6970822153
Yu Qiao6948429922
Yukio Tanaka6874419942
Zhijun Li6861414518
Iván Mora-Seró6723523229
Kazuo Tanaka6353527559
Da Xing6362414766
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Performance
Metrics
No. of papers from the Institution in previous years
YearPapers
202317
202258
2021644
2020815
2019908
2018837