Results 31 to 40 of about 3,698,626 (376)

Twistors and amplitudes [PDF]

open access: yesPhilosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, 2015
A brief review is given of why twistor geometry has taken a central place in the theory of scattering amplitudes for fundamental particles. The emphasis is on the twistor diagram formalism as originally proposed by Penrose, the development of which has now led to the definition by Arkani-Hamedet al.of the ‘amplituhedron’.
openaire   +3 more sources

DYNAMIC AND MATHEMATICAL MODELS OF THE HYDROIMPULSIVE VIBRO-CUTTING DEVICE WITH A PRESSURE PULSE GENERATOR BULT INTO THE RING SPRING

open access: yesInformatyka, Automatyka, Pomiary w Gospodarce i Ochronie Środowiska, 2022
Structural calculation scheme of the hydropulse device for vibration cutting with built-in ring with pressure pulse generator (PPG) is considered. On the basis of the structural scheme and cyclogram of the working cycle of the device, its dynamic and ...
Roman Obertyukh   +5 more
doaj   +1 more source

The Variation of the Linewidths and Amplitudes of Sub-Doppler Resonances of 87Rb D2 Line with Laser Beam Intensity

open access: yesSakarya Üniversitesi Fen Bilimleri Enstitüsü Dergisi, 2022
The sub-Doppler resonances linewidths and amplitudes depend on the laser beam intensity. The effect of laser beam intensity on the resonance linewidths and amplitudes obtained from different energy transitions of atoms varies from resonance to resonance.
Ersoy Şahin
doaj   +1 more source

Scattering amplitude annihilators

open access: yes, 2020
Several second order differential operators are shown to annihilate the YM and GR tree scattering amplitudes. In particular we prove a conjecture of Loebbert, Mojaza and Plefka from their investigation of a hidden conformal symmetry in GR.Comment: 31 ...
Nützi, Andrea, Reiterer, Michael
core   +1 more source

Electrically Tunable Metasurface with Independent Frequency and Amplitude Modulations

open access: yes, 2020
Metasurfaces with actively tunable features are highly demanded for advanced applications in electronic and electromagnetic systems. However, realizing independent dual-tunability remains challenging and requires more efforts.
Jin Zhang   +4 more
semanticscholar   +1 more source

Tropical Amplitudes [PDF]

open access: yesAnnales Henri Poincaré, 2017
In this work, we argue that the α′→0 limit of closed string theory scattering amplitudes is a tropical limit. The motivation is to develop a technology to systematize the extraction of Feynman graphs from string theory amplitudes at higher genus.
openaire   +2 more sources

Vascular response to the microcirculation in the fingertip by local vibration with varied amplitude

open access: yesFrontiers in Bioengineering and Biotechnology, 2023
Objectives: We investigated the effect of local vibration intensity on the vascular response to the microcirculation of the finger.Materials and methods: We performed hand-transmitted vibration experiments combined with laser Doppler flowmetry (LDF) to ...
Lizhong Mu   +10 more
doaj   +1 more source

Complete amplitude and phase control of light using broadband holographic metasurfaces. [PDF]

open access: yesNanoscale, 2017
Reconstruction of light profiles with amplitude and phase information, called holography, is an attractive optical technology with various significant applications such as three-dimensional imaging and optical data storage.
Gun-Yeal Lee   +8 more
semanticscholar   +1 more source

Small amplitude quasi-breathers and oscillons [PDF]

open access: yes, 2008
Quasi-breathers (QB) are time-periodic solutions with weak spatial localization introduced in G. Fodor et al. in Phys. Rev. D. 74, 124003 (2006).
A. E. Kudryavtsev   +9 more
core   +2 more sources

Improvement of upper limb’s condition of women with post mastectomy syndrome with the help of problem-oriented program of physical rehabilitation

open access: yesPedagogics, Psychology, Medical-Biological Problems of Physical Training and Sports, 2015
Purpose: to determine effectiveness of problem-oriented program of women’s physical rehabilitation with post mastectomy syndrome in improvement of upper limb’s functional state.
Y.A. Briskin, T.Y. Odinets
doaj   +1 more source

Home - About - Disclaimer - Privacy