Results 71 to 80 of about 3,588,956 (379)

Graviton amplitudes from collinear limits of gauge amplitudes

Physics Letters B, 2015
We express all tree-level graviton amplitudes in Einstein's gravity as the collinear limits of a linear combination of pure Yang-Mills amplitudes in which each graviton is represented by two gauge bosons, each of them carrying exactly one half of graviton's momentum and helicity.
Stieberger, Stephan, Taylor, Tomasz R.
openaire   +4 more sources

Fusing gauge theory tree amplitudes into loop amplitudes [PDF]

Nuclear Physics B, 1995
49 pages, SLAC-PUB ...
Lance J. Dixon, David A. Kosower, Zvi Bern, David C. Dunbar   +3 more
openaire   +6 more sources

Celestial twistor amplitudes

Physical Review D, 2023
56 pages plus appendices, v2:minor typos fixed, v3:minor correction, v4:edited for ...
Graham R. Brown, Joshua Gowdy, Bill Spence   +2 more
openaire   +2 more sources

Archaeal protein containing domain of unknown function 2193 undergoes oligomeric reconfiguration upon iron–sulfur cluster binding

FEBS Letters, EarlyView.
This work presents the characterization of MvoDUF2193, a Methanococcus voltae (Mvo) protein from the domain of unknown function (DUF) 2193 family. We demonstrate that MvoDUF2193 binds a single [4Fe–4S] cluster per subunit and that cluster occupancy regulates the transition from an apo tetramer to a [4Fe–4S] monomeric form. This structural transition is
Emily M. Dieter, James Larson, Monika Tokmina‐Lukaszewska, Jin Xiong, Jared Green, Yisong Guo, William E. Broderick, Brian Bothner, Joan B. Broderick   +8 more
wiley   +1 more source

Amplitude measurements of Faraday waves

, 2000
A light reflection technique is used to measure quantitatively the surface elevation of Faraday waves. The performed measurements cover a wide parameter range of driving frequencies and sample viscosities.
A. Kudrolli, A. Kudrolli, A. Wernet, A.B. Ezersky, A.B. Ezersky, A.D.D. Craig, B. Christiansen, B.J. Gluckmann, B.J. Gluckmann, C. Jung, C. Wagner, C. Wagner, C. Wagner, C.L. Goodridge, D. Binks, D. Dabiri, D. Papathanassiou, D.B. Kothe, D.M. Henderson, E. Bosch, E. Schröder, F. Raynal, F.H. Harlow, H. Arbell, H. W. Müller, H.W. Müller, J. Bechhoefer, J. C. Virnig, J. Wright, J.W. Miles, K. Knorr, K. Kumar, K. Kumar, K.R. Nicolas, M. Battezzati, M. Perlin, M. Silber, M. Silber, M.L. Banner, O. Lioubashevski, P. Chen, R. Ramshankar, R. Richter, S. Ciliberto, S. Douady, S. Douady, S.S. Atatürk, S.T. Milner, T. Roesgen, T.B. Benjamin, W. Barten, W. Zhang, W. Zhang, W. Zhang, W.B. Wright, W.S. Edwards, W.W. Schultz   +56 more
core   +1 more source

Dual picosecond fast tunable optical parametric amplifier laser system for wide-field nonlinear optical microscopy

APL Photonics
In the last decades, nonlinear optical microscopy techniques, such as two-Photon Excited Fluorescence (2PEF), Sum Frequency Generation (SFG), and Hyperspectral Coherent Anti-Stokes Raman Scattering (H-CARS) microscopy, emerged as powerful tools to image ...
Federico Vernuccio, Assia Benachir, Eric Michele Fantuzzi, Benoit Morel, Simone Bux, Erwann Martin, José Villanueva, Yoann Pertot, Nicolas Thiré, Sandro Heuke, Hervé Rigneault   +10 more
doaj   +1 more source

Physical Simulation of Ultrasonic Imaging Logging Response

Sensors, 2022
Ultrasonic imaging logging can visually identify the location, shape, dip angle and orientation of fractures and holes. The method has not been effectively applied in the field; one of the prime reasons is that the results of physical simulation ...
Junqiang Lu, Jiyong Han, Jinping Wu, Xiaohua Che, Wenxiao Qiao, Jiale Wang, Xu Chen   +6 more
doaj   +1 more source

Amplitude- and Fluctuation-Based Dispersion Entropy

Entropy, 2018
Dispersion entropy (DispEn) is a recently introduced entropy metric to quantify the uncertainty of time series. It is fast and, so far, it has demonstrated very good performance in the characterisation of time series.
Hamed Azami, J. Escudero
semanticscholar   +1 more source

Full one-loop amplitudes from tree amplitudes [PDF]

Journal of High Energy Physics, 2008
We establish an efficient polynomial-complexity algorithm for one-loop calculations, based on generalized $D$-dimensional unitarity. It allows automated computations of both cut-constructible {\it and} rational parts of one-loop scattering amplitudes from on-shell tree amplitudes.
Giele, Walter T., Kunszt, Zoltan, Melnikov, Kirill   +2 more
openaire   +5 more sources

Redox‐dependent binding and conformational equilibria govern the fluorescence decay of NAD(P)H in living cells

FEBS Letters, EarlyView.
In this work, we reveal how different enzyme binding configurations influence the fluorescence decay of NAD(P)H in live cells using time‐resolved anisotropy imaging and fluorescence lifetime imaging microscopy (FLIM). Mathematical modelling shows that the redox states of the NAD and NADP pools govern these configurations, shaping their fluorescence ...
Thomas S. Blacker, Nimit Mistry, Nicoletta Plotegher, Elizabeth R. Westbrook, Michael D. E. Sewell, John Carroll, Gyorgy Szabadkai, Angus J. Bain, Michael R. Duchen   +8 more
wiley   +1 more source