Results 51 to 60 of about 1,656,273 (329)

Two-Photon Excitation of Asymmetric GaN/AlGaN Quantum Discs [PDF]

AIP Conference Proceedings, 2007
By using two‐photon absorption spectroscopy we have performed time‐integrated and time‐resolved photoluminescence measurements on several coupled asymmetric GaN quantum discs, with embedded AlGaN barriers. We observe free‐carrier screening, with an enhancement due to tunneling between the coupled quantum discs.
Lee, K, Na, J, Birner, S, Yi, SN, Taylor, R, Park, Y, Park, C, Kang, T   +7 more
openaire   +2 more sources

Excitation energy dependence of fragment-mass distributions from fission of 180,190Hg formed in fusion reactions of 36Ar + 144,154Sm

Physics Letters B, 2015
Mass distributions of fission fragments from the compound nuclei 180Hg and 190Hg formed in fusion reactions 36Ar + 144Sm and 36Ar + 154Sm, respectively, were measured at initial excitation energies of E⁎(Hg180)=33–66 MeV and E⁎(Hg190)=48–71 MeV.
K. Nishio, A.N. Andreyev, R. Chapman, X. Derkx, Ch.E. Düllmann, L. Ghys, F.P. Heßberger, K. Hirose, H. Ikezoe, J. Khuyagbaatar, B. Kindler, B. Lommel, H. Makii, I. Nishinaka, T. Ohtsuki, S.D. Pain, R. Sagaidak, I. Tsekhanovich, M. Venhart, Y. Wakabayashi, S. Yan   +20 more
doaj   +1 more source

Molecular asymmetry of a photosynthetic supercomplex from green sulfur bacteria

Nature Communications, 2022
Cryo-EM reveals an asymmetric bacterial photosynthetic supercomplex built upon a homodimeric reaction center core. The structure provides mechanistic insights into light excitation transfer and a possible evolutionary transition intermediate of ...
Ryan Puskar, Chloe Du Truong, Kyle Swain, Saborni Chowdhury, Ka-Yi Chan, Shan Li, Kai-Wen Cheng, Ting Yu Wang, Yu-Ping Poh, Yuval Mazor, Haijun Liu, Tsui-Fen Chou, Brent L. Nannenga, Po-Lin Chiu   +13 more
doaj   +1 more source

Laser-induced quantum pumping in graphene [PDF]

, 2012
We investigate non-adiabatic electron pumping in graphene generated by laser irradiation with linear polarization parallel or perpendicular to the transport direction.
Kohler, Sigmund, Prada, Elsa, San-Jose, Pablo, Schomerus, Henning   +3 more
core   +2 more sources

Analysis of Dynamical Characteristic of Piecewise-Nonlinear Asymmetric Hysteretic System Based on Incremental Harmonic Balance Method

Discrete Dynamics in Nature and Society, 2015
Considering a sort of elastic mass with asymmetric hysteresis characteristic which widespread existing in engineering field, a piecewise-nonlinear dynamical equation, which contains asymmetric hysteretic loop, is established.
H. R. Liu, J. Z. Li, D. X. Hou, R. R. Yin, J. S. Jiang   +4 more
doaj   +1 more source

Asymmetric Parametric Excitation Mechanism for Biped Robot

Journal of the Robotics Society of Japan, 2012
This research proposes a Asymmetry Parametric Excitation for a Biped Robot. In our research, we succeeded in developing an experimental parametric excited walking robot with counter weights and achieved the improvement of energy efficiency. However, the mechanism of this improvement has not been clarified. In this paper, we clarify the relation between
Takeshi Hayashi, Toyoyuki Honjo, Akinori Nagano, Zhi-Wei Luo   +3 more
openaire   +2 more sources

Revealing the structure of land plant photosystem II: the journey from negative‐stain EM to cryo‐EM

FEBS Letters, EarlyView.
Advances in cryo‐EM have revealed the detailed structure of Photosystem II, a key protein complex driving photosynthesis. This review traces the journey from early low‐resolution images to high‐resolution models, highlighting how these discoveries deepen our understanding of light harvesting and energy conversion in plants.
Roman Kouřil
wiley   +1 more source

Reducing Influence of Hardware of Communication Station on Characteristics of Asymmetric Biconical Dipole Using Magneto-Dielectric Substrate on Finite-Size Metal Screen

East European Journal of Physics
Based on the approximate analytical solution previously obtained by the authors to the problem of excitation (radiation, scattering) of electromagnetic waves by an asymmetric biconical dipole with distributed surface impedance (constant and variable) in ...
Mikhail V. Nesterenko, Victor A. Katrich, Svetlana V. Pshenichnaya, Sergey А. Pogarsky   +3 more
doaj   +1 more source

Study of fission using multi-nucleon transfer reactions

EPJ Web of Conferences, 2017
It is shown that multi-nucleon transfer reaction is a powerful tool to study fission of exotic neutronrich actinide nuclei, which cannot be accessed by particle-capture or heavy-ion fusion reactions.
Nishio Katsuhisa, Hirose Kentaro, Mark Vermeulen, Makii Hiroyuki, Orlandi Riccardo, Tsukada Kazuaki, Asai Masato, Toyoshima Atsushi, Sato Tetsuya K., Nagame Yuichiro, Chiba Satoshi, Aritomo Yoshihiro, Tanaka Shouya, Ohtsuki Tsutomu, Tsekhanovich Igor, Petrache Costel M., Andreyev Andrei   +16 more
doaj   +1 more source

Projectile excitation in strongly asymmetric ion-atom collisions [PDF]

Journal of Physics B: Atomic, Molecular and Optical Physics, 1988
In an ion-atom collision at velocity v such that v>>ZT, the nuclear charge of the target, the first Born approximation is expected to be valid. However, if at the same time ZP>>ZT, where ZP is the projectile nuclear charge, the first Born approximation is never valid at non-relativistic velocities since the projectile field cannot be regarded as a ...
U Thumm, J S Briggs, O Scholler
openaire   +1 more source