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Calculation of Characteristic Values for Periodic Potentials
Physical Review, 1933Section II reviews the general properties of the solutions of differential equations with periodic coefficients, the socalled Hill and Mathieu equations. In Section III asymptotic formulae for the eigenvalues of the Mathieu equation in the oscillatory region (Eq.
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Characteristics of intussusception in the period of arbitrary Rotavirus vaccination
Pediatrics International, 2022AbstractBackgroundIn November 2011, rotavirus (RV) vaccine was launched in Japan as a voluntary vaccination to prevent RV‐associated gastroenterocolitis. We examined the characteristics of intussusception following RV vaccination in our two centers.MethodsWe investigated intussusception patients <16 years old from January 2006 to September 2020 ...
Mutsumi Nakamura +9 more
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Entropy, Periodicity, and Graphs with Zero Euler Characteristic
Acta Mathematica Sinica, English Series, 2004zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Lü, Jie, Xiong, Jin Cheng, Chen, Jian
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Periodic Breathing in Preterm Infants: Incidence and Characteristics
Pediatrics, 1989The prevalence and characteristics of periodic breathing in preterm infants were measured by 24-hour impedance pneumograms in 66 preterm infants before discharge from the nursery. Four periodic breathing parameters (percentage of periodic breathing per quiet time, number of episodes of periodic breathing per 100 minutes of quiet time, mean duration of ...
S F, Glotzbach +4 more
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Growth Characteristics of Mouse Thymus in the Neonatal Period
Nature, 1967ALTHOUGH renewed efforts have been made towards an understanding of the function(s) of the thymus, the exact mechanisms involved remain unclear. It is not known whether the thymus serves primarily as a source of immunologically competent cells, or whether it produces a substance or substances and/or contact factors which may control proliferation and ...
M W, Hess, R D, Stoner, H, Cottier
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Alpaca semen characteristics previous to a mating period
Animal Reproduction Science, 2002Increasing the knowledge of the semen characteristics in the alpaca will contribute to understanding one of the many factors that affect the poor fertility rate in this species. Ten adult male alpacas, 2.6-10 years of age, average weight 64.7 +/- 4.7 kg were used.
Flores, Paloma +4 more
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Linear propagation characteristics of periodically segmented waveguides
Optics Letters, 1992Periodically segmented planar waveguides are modeled by using the rigorous modal method of diffraction gratings. The radiation loss, effective index, and electric-field strength distribution are analyzed for different segment duty cycles. It is shown that except for the low radiation loss and possible presence of stop bands, a segmented waveguide ...
L, Li, J J, Burke
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Characteristics of resonant periodic orbits
Astrophysics and Space Science, 1982We study the families of periodic orbits in a time-independent two-dimensional potential field symmetric with respect to both axes. By numerical calculations we find characteristic curves of several families of periodic orbits when the ratio of the unperturbed frequencies isA1/2/B1/2=2/1.
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Response characteristics of a neuron model to a periodic input
Kybernetik, 1974A mathematical neuron model defined by a difference equation was investigated when it was exposed to an environment of a periodic input stimulus. It is shown that pulse sequences constructed in advance by a particular method are actually realizable as the output of the system and the condition for the output sequence is also obtained with respect to ...
Sato, Shunsuke +2 more
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On characteristic polynomials of periodic graphs
Discrete Mathematics and Applications, 2004This work considers periodic graphs of two types, chain and cyclic extensions of an arbitrary graph. Some formulas are obtained which express the characteristic polynomials of such constructions in terms of the polynomials of the initial graphs, their subgraphs and the polynomials of a chain and a cycle.
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