Results 31 to 40 of about 906,775 (316)

Angular Distribution of Characteristic Radiation Following the Excitation of He-Like Uranium in Relativistic Collisions

open access: yesAtoms, 2021
In this paper, we present an experimental and theoretical study of excitation processes for the heaviest stable helium-like ion, that is, He-like uranium occurring in relativistic collisions with hydrogen and argon targets.
Alexandre Gumberidze   +27 more
doaj   +1 more source

THE EXCITEMENT OF DISCOVERY [PDF]

open access: yesAnnual Review of Biochemistry, 2004
I had the good luck to start research at the dawn of molecular biology when it was possible to ask fundamental questions about the nature of the nucleic acids and how information is transferred in living systems. The search for answers led me into many different areas, often with the question of how molecular structure leads to biological function ...
openaire   +2 more sources

Quantification of dynamic excitation potential of pedestrian population crossing footbridges [PDF]

open access: yes, 2011
Due to their slenderness, many modern footbridges may vibrate significantly under pedestrian traffic. Consequently, the vibration serviceability of these structures under human-induced dynamic loading is becoming their governing design criterion.
Pavić, Aleksandar   +3 more
core   +1 more source

Excitation-Wavelength-Dependent Charge-Carrier Lifetime in Hematite: An Insight from Nonadiabatic Molecular Dynamics

open access: yes, 2023
Experiments have reported that the photoexcited carrier lifetime in α-Fe2O3 has a significant excitation-wavelength dependence but leave the physical mechanism unresolved.
Hongliang Li (122229)   +4 more
core   +1 more source

Effect of Fluctuating Flow Rate of Fracturing Pump on Vibration Characteristics of High-Pressure Manifold

open access: yesShiyou jixie, 2021
The operation stability of high-pressure manifold in fracturing process is of great significance to ensuring oil and gas field exploitation, therefore, it is awfully necessary to study the fluid-solid coupling vibration characteristics of high-pressure ...
Zhang Yongxue   +4 more
doaj  

Excitation Energy Transfer and Trapping in Higher Plant Photosystem II Complexes with Different Antenna Sizes [PDF]

open access: yes, 2011
700 cm(-1)) and a slow relaxation of the radical pair to an irreversible state (similar to 150 ps). Somewhat unexpectedly, we had to reduce the energy-transfer and charge-separation rates in complexes with decreasing size to obtain optimal fits.
van Amerongen, H.   +14 more
core   +1 more source

Excitation and breakup of [pi]+[pi]--atoms at high energies [PDF]

open access: yes, 2003
The DIRAC collaboration at CERN currently aims at measuring the lifetime of pionium (π + π − -atoms) with an accuracy of 10%. This is a crucial test of Chiral Perturbation Theory which predicts the lifetime to be (2.9 ± 0.1) fs.
Schumann, Marc
core   +1 more source

A comparison study of steady-state vibrations with single fractional-order and distributed-order derivatives

open access: yesOpen Physics, 2017
We conduct a detailed study and comparison for the one-degree-of-freedom steady-state vibrations under harmonic driving with a single fractional-order derivative and a distributed-order derivative.
Duan Jun-Sheng   +2 more
doaj   +1 more source

Contribution to research of thermal loads in commercial vehicles powertrain mounts / Приложение к исследованию тепловой нагрузкиопоры силового привода грузового автомобиля / Prilog istraživanju toplotnih opterećenja oslonaca pogonske grupe teretnog motornog vozila [PDF]

open access: yesVojnotehnički Glasnik, 2017
Due to the effects of excitations of road micro-roughness and the powertrain as well as due to the conditions of movement (acceleration, braking, curvilinear movement), the weights of commercial vehicles perform complex spatial oscillations. The negative
Miroslav D. Demić , Jasna D. Glišović
doaj   +1 more source

Coulomb excitation of 66ge [PDF]

open access: yes, 2021
Philosophiae Doctor - PhDThe Coulomb excitation of 66Ge has been performed for the rst time using \safe" bombarding energies at the HIE-ISOLDE facility at CERN in July 2017.
Abrahams, Kenzo
core   +1 more source

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