in order to determine the age structure, growth, and length-weight relationship of the mudskipper, periophthalmus waltoni, from coastal mudflats of qeshm island, soroo and bandar-pol, in hormuzgan province, iran, we collected 192 individuals in february 2007. age was determined using the second pectoral radial bone and year class was based on length-frequency distributions. growth was descr...

The Graphene based single electron transistor (SET) as a coulomb blockade device need to be explored .It is a unique device for high-speed operation in a nano scale regime. A single electron transfers via the coulomb barriers, but its movement may be prevented by coulomb blockade, so its effect is investigated in this research. The conditions of coulomb blockade and its controlling factors such...

Excitons in a quantum well depend on the interfacial roughness resulting from its growth. The interface is characterized by islands of size j separated by one monolayer steps across which the confining potential decreases by V0 for wider wells. A natural length is the localization length j05p\/A2MV0 characterizing the minimum size island to confine an exciton. For small islands (j,j0), the abso...

The diffusion and coarsening of two-dimensional homoepitaxial islands on Cu(100) and Ag(100) surfaces have been studied at room temperature with time-sequenced scanning tunneling microscopy. Quantitative analyses of the dependence of island diffusion coefficient D vs the island side length L, D ~ L , yield noninteger scaling exponents which are consistent with island coalescence. Moreover, the ...

The island rule states that after island colonization, larger animals tend to evolve reduced body sizes and smaller animals increased sizes. Recently, there has been disagreement about how often, if ever, this rule applies in nature, and much of this disagreement stems from differences in the statistical tests employed. This study shows, how different tests of the island rule assume different n...

The effects of strain on the island-morphology and size-distribution in irreversible submonolayer growth with rapid island relaxation are investigated. In our simulations the strain energy is approximated by an isotropic 1/r interaction. While the island density increases with strain, in the presence of sufficient island relaxation due to edge-diffusion, the island-shape changes from square to ...

Sado Island is floating offshore of Niigata on Sea of Japan. This island is 855km2 and composed of Ko-sado (Small Sado) and O-Sado (Large Sado), and both them are arranged in a direction of NNE-SSW. This arrangement are parallel to Kakuda-Yahiko Range, south of Niigata City in the main land. O-Sado has the highest peak of more than 1100 m (Kinpokusan: 1172m), and Ko-Sado of 600 m high peak (Dai...

Madagascar is a large island, some 1600 km in length (north to south) and 587,000 square kilometres in area. The island lies around 300 km off Mozambique (south-east Africa) in the Indian Ocean. Topography consists of a central mountainous region with an average altitude of 2000 m, which covers around two thirds of the island. The highest point is Maromokotro (2876 m). The uplands are surrounde...