Results 61 to 70 of about 4,127,735 (321)

Geographic variation in walking activity in the red flour beetle Tribolium castaneum

Population Ecology, EarlyView.
This study examined whether there is geographic variation in field populations, focusing on the moving activity in the red flour beetle Tribolium castaneum. Results showed significant differences in moving activity among field populations but no correlation with latitude or meteorological factors.
Kentarou Matsumura
wiley   +1 more source

Two-State Lasing in Microdisk Laser Diodes with Quantum Dot Active Region

Photonics, 2023
The two-state lasing phenomenon, which manifests itself in simultaneous laser emission through several optical transitions of quantum dots, is studied in microdisk diode lasers with different cavity diameters.
Ivan Makhov, Konstantin Ivanov, Eduard Moiseev, Anna Dragunova, Nikita Fominykh, Yuri Shernyakov, Mikhail Maximov, Natalia Kryzhanovskaya, Alexey Zhukov   +8 more
doaj   +1 more source

Muonic hydrogen ground state hyperfine splitting

, 2003
Corrections of orders alpha^5, alpha^6 are calculated in the hyperfine splitting of the muonic hydrogen ground state. The nuclear structure effects are taken into account in the one- and two-loop Feynman amplitudes by means of the proton electromagnetic ...
A. A. Abrikosov, A. Adamczak, A. C. Zemach, A. I. Mil’shtein, A. P. Martynenko, A. P. Martynenko, A. P. Martynenko, A. P. Martynenko, A. P. Martynenko, E. Borie, E. V. Cherednikova, F. Guerin, G. Breit, G. G. Simon, G. M. Zinov’ev, G. T. Bodwin, G. T. Bodwin, H. Hellwig, H. M. Fried, J. Bernabeu, J. L. Friar, K. Pachucki, L. P. Gor’kov, M. I. Eides, M. I. Eides, M. I. Eides, P. J. Mohr, R. N. Faustov, R. N. Faustov, R. R. Akhmetshin, S. A. Zapryagaev, S. D. Drell, S. G. Karshenboim, S. G. Karshenboim, T. Kinoshita, V. B. Berestetskii, V. G. Ivanov, Yu. L. Sokolov   +37 more
core   +1 more source

Moving in the Dark: Enlightening the Spatial Population Ecology of European Cave Salamanders

Population Ecology, EarlyView.
We assessed individual interactions, movement ecology and activity patterns of a subterranean population of Speleomantes strinatii, applying spatial capture–recapture modeling to a photographic dataset of 104 individuals. ABSTRACT Space use and movement are fundamental aspects of organisms' ecology, mirroring individual fitness, behavior, and life ...
Giacomo Rosa, Andrea Costa, Sebastiano Salvidio   +2 more
wiley   +1 more source

Ground-State Electromagnetic Moments of Calcium Isotopes [PDF]

, 2015
High-resolution bunched-beam collinear laser spectroscopy was used to measure the optical hyperfine spectra of the $^{43-51}$Ca isotopes. The ground state magnetic moments of $^{49,51}$Ca and quadrupole moments of $^{47,49,51}$Ca were measured for the ...
Bissell, M. L., Blaum, K., Frommgen, N., Hammen, M., Holt, J. D., Kowalska, M., Kreim, K., Menendez, J., Neugart, R., Neyens, G., Nortershauser, W., Nowacki, F., Papuga, J., Poves, A., Ruiz, R. F. Garcia, Schwenk, A., Simonis, J., Yordanov, D. T.   +17 more
core   +2 more sources

Infection Models for Pine Wilt Disease on the Basis of Vector Behaviors

Population Ecology, EarlyView.
Infection models for pine wilt disease without vector density were built to estimate the transmission coefficient of the pathogenic nematode. The models successfully simulated the annual change in the density of infected trees for four pine stands. ABSTRACT Pine wilt disease is caused by the pinewood nematode (Bursaphelenchus xylophilus Steiner et ...
Katsumi Togashi
wiley   +1 more source

Approximating Ground States by Neural Network Quantum States

Entropy, 2019
Motivated by the Carleo’s work [Science, 2017, 355: 602], we focus on finding the neural network quantum statesapproximation of the unknown ground state of a given Hamiltonian H in terms of the best relative error and explore the influences of sum,
Ying Yang, Chengyang Zhang, Huaixin Cao
doaj   +1 more source

Ground-state configurations in ferromagnetic nanotori

, 2010
Magnetization ground states are studied in toroidal nanomagnets. The energetics associated to the ferromagnetic, vortex and onion-like configurations are explicitly computed.
A. R. Pereira, Aharoni A., Gradshteyn I. S., Hubet A., V. L. Carvalho-Santos, W. A. Moura-Melo   +5 more
core   +1 more source

Masses of ground and excited-state hadrons [PDF]

, 2011
We present the first Dyson-Schwinger equation calculation of the light hadron spectrum that simultaneously correlates the masses of meson and baryon ground- and excited-states within a single framework.
A. Bender, A. Bender, A. Buck, A. Buck, A. Cucchieri, A. Höll, A.C. Aguilar, A.M. Gasparyan, C. Alexandrou, C. Hanhart, C.D. Roberts, C.D. Roberts, C.D. Roberts, C.D. Roberts, C.H. Llewellyn-Smith, C.J. Burden, C.J. Burden, C.S. Fischer, Craig D. Roberts, D. Ebert, D. Ebert, D.B. Leinweber, G. Eichmann, G. Eichmann, G. Krein, G.P. Engel, H.H. Matevosyan, H.J. Munczek, Hannes L. L. Roberts, I.C. Cloët, I.C. Cloët, Ian C. Cloët, J. Bulava, J. Rodriguez-Quintero, J.C.R. Bloch, J.R. Pelaez, K. Nakamura, L. Chang, L. Chang, L.C.L. Hollenberg, L.X. Gutiérrez-Guerrero, Lei Chang, M. Oettel, M.A. Ivanov, M.A. Pichowsky, M.B. Hecht, M.K. Volkov, M.S. Bhagwat, M.S. Bhagwat, M.S. Bhagwat, N. Ishii, N. Suzuki, P. Maris, P. Maris, P. Maris, P. Maris, P. Watson, R. Alkofer, R.D. Young, R.J. Holt, R.T. Cahill, R.T. Cahill, S. Capstick, S.J. Brodsky, W. Bentz   +64 more
core   +2 more sources

On the ground state of ferromagnetic Hamiltonians [PDF]

Czechoslovak Journal of Physics, 2004
It is generally believed that the ground state of the ferromagnetic Heisenberg-Dirac-Van Vleck Hamiltonians acting on s=1/2 spins of a lattice with N sites has the maximal possible value of the total spin S=N/2 and is N+1 times degenerate. We present a rigorous proof of this statement, independent of the lattice dimension and topology.
V. I. Inozemtsev, J. Dittrich
openaire   +3 more sources