although in the recent years, the effect of ground water level on radial growth of black alder has attacked attentions of scientist but to comprehensively interpret the results of such studies, we need to investigate the independent influence of climate on ring width and other wood anatomical features of this species. hence, in current study, the influence of climatic factors on the annual ring...

Otoliths, also known as ear stones, are small body parts that help fish with hearing and balance. Like tree rings, otoliths form one light dark band per year, creating rings. These rings can be measured to understand growth. The wider the ring, greater In our study, we used how species—lake trout—responds rising temperature in state of Alaska. We found warmer spring air earlier lake ice melt we...

The linear stability of thin vortex rings are studied by short-wavelength stability analysis. The modified Hill–Schrödinger equation for vortex rings, which incorporates curvature effect, is derived. It is used to evaluate growth rates analytically. The growth rates are also evaluated by numerical calculation and they agree well with analytical values for small e which is the ratio of core radi...

Transformation of self-assembled InAs quantum dots (QDs) on InP(100) into quantum rings (QRs) is studied. In contrast to the typical approach to III--V semiconductor QR growth, the QDs are not capped to form rings. Atomic force micrographs reveal a drastic change from InAs QDs into rings after a growth interruption in tertiarybutylphosphine ambient. Strain energy relief in the InAs QD is discus...

In the past 15 years a study of “noncommutative projective geometry” has flourished. By using and generalizing techniques of commutative projective geometry, one can study certain noncommutative graded rings and obtain results for which no purely algebraic proof is known. For instance, noncommutative graded domains of quadratic growth, or “noncommutative curves,” have now been classified by geo...

BACKGROUND AND AIMS The mangrove Rhizophora mucronata has previously been reported to lack annual growth rings, thus barring it from dendrochronological studies. In this study the reported absence of the growth rings was reconsidered and the periodic nature of light and dark brown layers visible on polished stem discs investigated. In addition, the formation of these layers in relation to preva...

ʻWhite rings ̓have been reported to occur within trembling aspen (Populus tremuloides Michx.) during years of intense early defoliation by the forest tent caterpillar (Malacosoma disstria Hbn.). This study was undertaken to 1) assess the distribution of white rings within trembling aspen stems and 2) to quantify the anatomical differences between white rings and the ʻnormal ̓rings formed in the p...