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Electrons at the surface of a plasma that is irradiated by a laser with intensity in excess of $10^{23}~\mathrm{W}\mathrm{cm}^{-2}$ are accelerated so strongly that they emit bursts of synchrotron radiation. Although the combination of high…

等离子体物理 · 物理学 2021-05-12 T. G. Blackburn , A. J. MacLeod , A. Ilderton , B. King , S. Tang , M. Marklund

Attosecond ionization time-delays at photoelectron energies above typically 10 eV are usually interpreted using the so called asymptotic approximation as a sum of the atomic or molecular delays with a universal laser-induced contribution.…

Methyl valerate (C$_6$H$_{12}$O$_2$, methyl pentanoate) is a methyl ester and a relevant surrogate component for biodiesel. In this work, we present ignition delays of methyl valerate measured using a rapid compression machine at a range of…

化学物理 · 物理学 2017-06-07 Bryan W. Weber , Justin Bunnell , Kamal Kumar , Chih-Jen Sung

Visual perceptions often come with illusions whose physical origin are not well understood yet. The encoding of stochastic light intensity $x(t)$ into spikes with firing rate $r(t)$ at time $t$ is investigated in an experiment with retinas…

神经元与认知 · 定量生物学 2021-10-04 Qi-Rong Lin , Po-Yu Chou , C. K. Chan

The experimental part of this study has shown that hunger motivation may be evoked by a long-term (10=180 s) continuous electrical stimulation of the "hunger center" at a current of 133.6{\pm}8.1 mkA. Positive emotions were caused by…

神经元与认知 · 定量生物学 2011-10-19 Sergey E. Murik

On 28 January 2018, the High Energy Stereoscopic System (H.E.S.S.) reported a significant very-high-energy (VHE) gamma-ray activity, occurring nearly 11 days after the high-energy (HE) gamma-ray flare observed by \textit{Fermi}-LAT from the…

高能天体物理现象 · 物理学 2024-10-17 Sunanda , Reetanjali Moharana

The Lorentz-Abraham-Dirac (LAD) equation has proved valuable in describing the motion of radiating electric charges but suffers from runaway, pre-acceleration and other ambiguities. The usual scheme is problematic because of locality, which…

经典物理 · 物理学 2016-11-24 Sofiane Faci , Mario Novello

The inclusion of semiconducting material within a composite barrier enables the perfectly uniform propagation of surface ionization waves (SIW) in air at atmospheric pressure regardless of the polarity of the applied electric field, unlike…

等离子体物理 · 物理学 2026-01-05 Thomas Orrière , David Z. Pai

Cells of human buccal epithelium of 6 male donors were exposed to microwave radiation (frequency f=36,64 GHz, power density E = 10, 100, and 400 mcW/cm^2). Exposure time in all experiments was 10 seconds. Heterochromatin was stained by 2%…

细胞行为 · 定量生物学 2009-12-23 Y. G. Shckorbatov , V. N. Pasiuga , V. A. Grabina , N. N. Kolchigin , D. D. Ivanchenko , V. N. Bykov

Oxygen was electrochemically intercalated into Sr$_2$IrO$_4$ sintered samples, single crystals and a thin film. We estimate the diffusion length to a few $\mu$m and the concentration of the intercalated oxygen to $\delta$ $\simeq$ 0.01. The…

材料科学 · 物理学 2018-03-14 L. Fruchter , V. Brouet , D. Colson , J. -B. Moussy , A. Forget , Z. Z. Li

Recent experimental evidences indicate that pyruvate, the final metabolite of glycolysis, has a remarkable protective effect against different types of brain injury. The purpose of this study was to assess the neuroprotective effect and the…

组织与器官 · 定量生物学 2007-08-15 A. Gonzalez-Falcon , E. Candelario-Jalil , M. Garcia-Cabrera , O. S. Leon

In an attempt to constrain and understand the emission mechanism of gamma rays, we perform a cross-correlation analysis of 15 blazars using light curves in millimetre, optical and gamma rays. We use discrete correlation function and…

高能天体物理现象 · 物理学 2015-12-15 V. Ramakrishnan , T. Hovatta , M. Tornikoski , K. Nilsson , E. Lindfors , M. Baloković , A. Lähteenmäki , R. Reinthal , L. Takalo

Hydroxyapatite synthesized by a wet chemical route was subjected to heavy Krypton ion irradiation of 4MeV at various fluences. Glancing incidence Xray diffraction results confirmed the phase purity of irradiated HA with a moderate…

应用物理 · 物理学 2020-02-03 Hui Zhu , Dagang Guo , Hang Zang , Dorian A. H. Hanaor , Sen Yu , Franziska Schmidt , Kewei Xu

We investigate laser induced nonsequential multiple ionization using a simple statistical model in which an electron recollides inelastically with its parent ion. In this collision, it thermalizes with the remaining $N-1$ bound electrons…

原子物理 · 物理学 2007-05-23 C. Figueira de Morisson Faria , X. Liu

Animal interval timing is often studied through the peak interval (PI) procedure. In this procedure, the animal is rewarded for the first response after a fixed delay from the stimulus onset, but on some trials, the stimulus remains and no…

神经元与认知 · 定量生物学 2022-04-05 Jason Zwicker , Francois Rivest

The behavior of a single molecule driven simultaneously by a laser and by an electric radio frequency field is investigated using a non-Hermitian Hamiltonian approach. Employing the renormalization group method for differential equations we…

量子物理 · 物理学 2013-05-29 Igor Rozhkov , E. Barkai

The effects of radiation reaction force on laser driven auto-resonant particle acceleration scheme are studied using Landau-Lifshitz equation of motion. These studies are carried out for both linear as well as circularly polarized laser…

等离子体物理 · 物理学 2016-01-20 Vikram Sagar , Sudip Sengupta , P. K. Kaw

We study the impact of light on the mammalian circadian system using the theory of phase response curves. Using a recently developed ansatz we derive a low-dimensional macroscopic model for the core circadian clock in mammals.…

神经元与认知 · 定量生物学 2019-10-14 Kevin M. Hannay , Daniel B. Forger , Victoria Booth

We present the results of the X-ray flaring activity of 1ES 1959+650 during October 25-26, 2017 using AstroSat observations. The source was variable in the X-ray. We investigated the evolution of the X-ray spectral properties of the source…

高能天体物理现象 · 物理学 2021-05-12 Zahir Shah , Savithri H. Ezhikode , Ranjeev Misra , Rajalakshmi T. R

Recordings from area V4 of monkeys have revealed that when the focus of attention is on a visual stimulus within the receptive field of a cortical neuron, two distinct changes can occur: The firing rate of the neuron can change and there…

神经元与认知 · 定量生物学 2007-05-23 Paul H. E. Tiesinga , Jean-Marc Fellous , Emilio Salinas , Jorge V. Jose , Terrence J. Sejnowski