Strata exposed near Tabbowa Tank, Tabbowa Basin, western Sri Lanka have yielded the first representatives of the distinctive Permian Glossopteris flora from that country. The assemblage includes gymnosperm foliage attributable to Glossopteris raniganjensis, roots referable to Vertebraria australis, seeds assigned to Samaropsis sp., sphenophyte axes (Paracalamites australis) and foliage (Sphenop...

Most of fire severity studies use field measures of composite burn index (CBI) to represent forest fire severity and fit the relationships between CBI and Landsat imagery derived differenced normalized burn ratio (dNBR) to predict and map fire severity at unsampled locations. However, less attention has been paid on the multi-strata forest fire severity, which represents fire activities and eco...

Stratified manifolds are encountered in the configuration manifolds of many robots. Some typical examples are the walking robots [4, 5]. The configuration manifolds of such robots are in general high dimensional with some distinctive features. The most important characteristic feature of stratified manifolds are that they are filled with discontinuities [5]. These discontinuities give rise to c...

A dynamic sampling plan among strata is a permutation of sampled items specifying which stratum is to receive the next item to be included in the sample. An optimal such plan has the property of achieving minimum variance for its cost whenever it is truncated. This article shows that optimal dynamic sampling plans exist under very general conditions, and gives a simple algorithm for constructin...

The statistical mechanical approach to complex networks is the dominant paradigm in describing natural and societal complex systems. The study of network properties, and their implications on dynamical processes, mostly focus on locally defined quantities of nodes and edges, such as node degrees, edge weights and -more recently- correlations between neighboring nodes. However, statistical metho...

Affine varieties among all algebraic varieties have simple structures. For example, an affine variety does not contain any complete algebraic curve. In this paper we study affine related properties of strata of k-differentials on smooth curves which parameterize sections of the k-th power of the canonical line bundle with prescribed orders of zeros and poles. We show that if there is a prescrib...

Recent research into very large, regularly shaped, geological structures has shown that in the 100 kHz to 10MHz frequency range electromagnetic waveguide behaviour is observed when the material forming the structure is not too lossy (conductivity σ < 0.0001). While mode formation and modal behaviour in electromagnetic waveguides is very well understood, much of the literature describes high fre...

The Nechako Ba sin (Fig 1) is part of the In te rior Pla teau phys io graphic re gion of Brit ish Co lum bia and has been var i ously de fined in terms of ex tent and age (Ferri and Rid dell, 2006). Ac cu rate as sess ment of the pe tro leum po ten tial of the Nechako Ba sin hinges on a com pre hen sive un der stand ing of the ba sin ar chi tec ture de vel oped within Cre ta ceous strata, which...

A Mississippian miospore assemblage has been recorded from well A in the Persian Gulf in Iranian offshore, for the first time. Fifteen species of spores have been recognized in the Early Carboniferous assemblage of this well which the most important of them are: Spelaeotriletes arenaceus, Aratrisporites saharaensis, Spelaeotriletes balteatus, Spelaeotriletes triangulus and Radiizonates arcuatus...

The aim of this study is to analyze the assemblage of trilobites in the Silurian sequences of Iran by exploring stratigraphic section of the Silurian Niur Formation (Asadli section).  Based on comprehensive field studies and laboratory investigations three Trilobite genera were identified in the study area including Calymene blumenbachii, Gravicalymene convolva, Dalmanites brevigladiolus </...