Results 11 to 20 of about 519,508 (75)
The periodic table of the elements with $4n^{2}$ $n=2,3,\dots$ periods [PDF]
arXiv, 2018 A modification of the standard periodic table of the elements reveals $4n^{2}$ periods, where $n=2,3,\dots$. The new arrangement places hydrogen with halogens and keeps the rare-earth elements in the table proper (without separating them as they are in the standard table).
arxiv
Periodic correlation structures in bacterial and archaeal complete genomes [PDF]
Current Bioinformatics, Vol. 8(2), 267-274 (2013), 2013 The periodic transference of nucleotide strings in bacterial and archaeal complete genomes is investigated by using the metric representation and the recurrence plot method. The generated periodic correlation structures exhibit four kinds of fundamental transferring characteristics: a single increasing period, several increasing periods, an increasing ...
arxiv
Mendeleev and the Periodic Table of Elements [PDF]
Sandhan, vol 4, no 2, pp. 115-123, 2004, 2004 This note presents reasons why Mendeleev chose Sanskrit names (now superseded) for eight elements in the periodic table.
arxiv
Double Periodicity and Frequency-Locking in the Langford Equation [PDF]
arXiv, 2007 The bifurcation structure of the Langford equation is studied numerically in detail. Periodic, doubly-periodic, and chaotic solutions and the routes to chaos via coexistence of double periodicity and period-doubling bifurcations are found by the Poincar\'e plot of successive maxima of the first mode $x_1$.
arxiv
Measuring the rotation period distribution of field M-dwarfs with Kepler [PDF]
, 2013 We have analysed 10 months of public data from the Kepler space mission to measure rotation periods of main-sequence stars with masses between 0.3 and 0.55 M_sun. To derive the rotational period we introduce the autocorrelation function and show that it is robust against phase and amplitude modulation and residual instrumental systematics.
arxiv +1 more source
A few remarks on periodic orbits for planar billiard tables [PDF]
arXiv, 2006 I announce a solution of the conjecture about the measure of periodic points for planar billiard tables. The theorem says that if $\Om\subset\R^2$ is a compact domain with piecewise $C^3$ boundary, then the set of periodic orbits for the billiard in $\Om$ has measure zero. Here I outline a proof. A complete version will appear elsewhere.
arxiv
Area-Preserving Surface Dynamics and S. Saito's Fixed Point Formula [PDF]
arXiv, 2007 We show that S. Saito's fixed point formula serves as a powerful tool for counting the number of isolated periodic points of an area-preserving surface map admitting periodic curves. His notion of periodic curves of types I and II plays a central role in our discussion.
arxiv
Superheavy elements: existence, classification and experiment [PDF]
arXiv, 2012 This paper proposes spatial periodic table developed based on classic electron shell structure model. The periodic table determines location and chemical properties of superheavy elements. 14 new long-living superheavy elements found by Proton-21 laboratory and one long-living superheavy element found by A.Marinov were identified.
arxiv
Superheavy Elements: Beyond the 7th Period in the Periodic Table [PDF]
arXiv, 2018 What is the heaviest element? In order to address this question, the elements up to $Z=118$ have been synthesized by now by using heavy-ion fusion reactions. This has completed the 7th period in the periodic table of elements, and new attempts have been commenced in aiming at syntheses of the elements in the 8th period.
arxiv
The periodic table of elementary particles [PDF]
arXiv, 2000 All leptons, quarks, and gauge bosons can be placed in the periodic table of elementary particles. The periodic table is derived from dualities of string theory and a Kaluza-Klein substructure for the six extra spatial dimensions. As a molecule is the composite of atoms with chemical bonds, a hadron is the composite of elementary particles with ...
arxiv