Zobrazeno 1 - 10
of 1 650
pro vyhledávání: '"Watanabe Takayuki"'
Autor:
Otsuji Taiichi, Boubanga-Tombet Stephane Albon, Satou Akira, Yadav Deepika, Fukidome Hirokazu, Watanabe Takayuki, Suemitsu Tetsuya, Dubinov Alexander A., Popov Vyacheslav V., Knap Wojciech, Kachorovskii Valentin, Narahara Koichi, Ryzhii Maxim, Mitin Vladimir, Shur Michael S., Ryzhii Victor
Publikováno v:
Nanophotonics, Vol 11, Iss 9, Pp 1677-1696 (2022)
This paper reviews recent advances in the research and development of graphene-based plasmonic metamaterials for terahertz (THz) laser transistors. The authors’ theoretical discovery on THz laser transistors in 2007 was realized as a distributed-fe
Externí odkaz:
https://doaj.org/article/039102eb365646c19ac59b17205ae22a
We establish Bowen's formula for the Julia set of a non-elementary, expanding, irreducible and aperiodic rational graph-directed Markov system satisfying the backward separating condition. Towards this end, we shall prove that the associated skew pro
Externí odkaz:
http://arxiv.org/abs/2403.18612
Autor:
Yadav Deepika, Tamamushi Gen, Watanabe Takayuki, Mitsushio Junki, Tobah Youssef, Sugawara Kenta, Dubinov Alexander A., Satou Akira, Ryzhii Maxim, Ryzhii Victor, Otsuji Taiichi
Publikováno v:
Nanophotonics, Vol 7, Iss 4, Pp 741-752 (2018)
A distributed feedback dual-gate graphene-channel field-effect transistor (DFB-DG-GFET) was fabricated as a current-injection terahertz (THz) light-emitting laser transistor. We observed a broadband emission in a 1–7.6-THz range with a maximum radi
Externí odkaz:
https://doaj.org/article/1fac7edf5d4744de85b9e82f4db1b8ba
A new variant of Newton's method - named Backtracking New Q-Newton's method (BNQN) - which has strong theoretical guarantee, is easy to implement, and has good experimental performance, was recently introduced by the third author. Experiments perform
Externí odkaz:
http://arxiv.org/abs/2401.01393
A new variant of Newton's method - named Backtracking New Q-Newton's method (BNQN) - which has strong theoretical guarantee, is easy to implement, and has good experimental performance, was recently introduced by the third author. Experiments perform
Externí odkaz:
http://arxiv.org/abs/2312.12166
Publikováno v:
MATEC Web of Conferences, Vol 333, p 03005 (2021)
An innovative multiphase AC arc was drastically improved by diode-rectification technique with bipolar electrode. Temperature fields and arc behaviour of the diode-rectified multiphase AC was successfully visualized on the basis of the high-speed cam
Externí odkaz:
https://doaj.org/article/a4c3f43f86d044b88ae7b45b605cd1b9
Publikováno v:
MATEC Web of Conferences, Vol 333, p 03004 (2021)
Fluctuation phenomena of plasma jet flow in an innovative long DC arc system with a ring-shaped anode were successfully clarified by a high-speed camera visualization. The long DC arc with long electrode gap distance more than 350 mm has been applied
Externí odkaz:
https://doaj.org/article/7acc0c0e6cea4f838a81ae86b931fa88
Autor:
Zhang Xiaoyu, Yamano Kentaro, Hayashida Ririko, Sone Hirotaka, Tanaka Manabu, Watanabe Takayuki
Publikováno v:
MATEC Web of Conferences, Vol 333, p 03007 (2021)
This study focus on the synthesis of amorphous silicon nanoparticles and understanding the formation mechanism. Counter-flow quenching gases with different flow rates were injected from downstream of the torch to understand the effect of quenching ga
Externí odkaz:
https://doaj.org/article/e884dacd4cf242ceb7f0824220277440
Autor:
Watanabe, Takayuki
Publikováno v:
Ergodic Theory and Dynamical Systems 44 (2024) No. 11, 3358--3384
In this paper, we consider random iterations of polynomial maps $z^2 +c_n$ where $c_n$ are complex-valued independent random variables following the uniform distribution on the closed disk with center $c$ and radius $r$. The aim of this paper is twof
Externí odkaz:
http://arxiv.org/abs/2206.06702
Autor:
Sumi, Hiroki, Watanabe, Takayuki
Publikováno v:
Nonlinearity, Volume 35, Number 4 (2022), 1857--1875
We consider non-i.i.d. random holomorphic dynamical systems whose choice of maps depends on Markovian rules. We show that generically, such a system is mean stable or chaotic with full Julia set. If a system is mean stable, then the Lyapunov exponent
Externí odkaz:
http://arxiv.org/abs/2101.08968