We consider magnetic Schrödinger operators on quantum graphs with identical edges. The spectral problem for the quantum graph is reduced to the discrete magnetic Laplacian on the corresponding combinatorial graph and a certain Hill equation. This may be viewed as a generalization of the classical spectral analysis for the Hill operator to such structures. Using this correspondence we show that ...

one of the most important sits of sasanian period in iran from which the royal hunting plaques were recovered has been chal tarkhan of eshgh abad. there was a sasanian palace containing a considerable number of stucco representing variety of subject pointing to a deep understanding of sasanian stucco art. in spite of the researchers made by e.g. thompson and kroger on this plaques yet, there ha...

Malaysia is known for having a variety of cultural values. The usage "pelamin" decorations well-known in Malay weddings Malaysia. roots design and layout are examined the context culture visual art this study. point that concept originated from royal throne, o which has been embraced to depict "raja sehari" (bridegroom) during wedding ceremonies. In Malaysia, consequence exchange also factor pr...

We introduce the colored version of Jackiw-Teitelboim (JT) gravity which is two-dimensional dilaton model with matrix-valued fields. It straightforwardly formulated in terms BF action $su(N,N)$ gauge algebra so that standard JT embedded as $su(1,1) \subset su(N,N)$ subsector. also elaborate on respective metric formulation shown to involve fields plus $su(N)$ non-Abelian well $su(N)$-matrix val...

G o l d i n (1963) found in Kazakhstan an interesting strain of tobacco mosaic virus (TMV). B r e a k (1978) established that this Kazakhstan strain (Ka strain) of TMV was defective and that it infected tobacco plants very slowly or the systemic infection was lacking. Its thermal inactivation point lay between 75 and 80° C. In fresh infective sap virus particles of normal length were found very...

This article focuses on the production of plaster ornaments in 19th century. The concludes with a special example Netherlands. From Renaissance stucco walls and ceilings were partly cast. In course century, for are manufactured an industrial scale. Unique Netherlands country house Wassenaar is figurative frieze by sculptor-stuccoist Wilhelm Dankberg from Berlin.

Masquerading comes at various costs and benefits. The principal benefit being the avoidance of predators. The orb-web spider Cyclosa ginnaga has a silver body and adds a white discoid-shaped silk decoration to its web. The size, shape and colour of C. ginnaga's body resemble, when viewed by the human eye against its decoration, a bird dropping. We therefore hypothesized that their body colourat...