Complex life cycles have evolved independently numerous times in marine animals as well as in disparate algae. Such life histories typically involve a dispersive immature stage followed by settlement and metamorphosis to an adult stage on the sea floor. One commonality among animals exhibiting transitions of this type is that their larvae pass through a 'precompetent' period in which they do no...

Three equivalence relations are considered on the set of n x n matrices with elements in Fo' an · abelian group with absorbing zero adjoined. They are the relations of diagonal similarity, diagonal equivalence, and restricted diagonal equivalence. These relations are usually considered for matrices with elements in a field, but only multiplication is involved. Thus our formulation in terms of a...

The natural environment affects the construction of desert highways. Conversely, highway construction affects the natural environment and puts the ecological environment at a disadvantage. To satisfy the variety and hierarchy of desert highway construction and discover the spatio-temporal distribution of the natural environment and its effect on highway construction engineering, an assessment o...

sand dunes mobility is one of the serious problems in arid regions. since wind regime is one of the important factors in sand dunes formation, its frequency, direction and magnitude can be effective. amount of wind energy and its directional variability (wind regime) have significant control on the morphology and maintenance of aeolian landforms. by recognizing of morphometric and morphodynamic...

s. Universidad de Zaragoza 81–82. Seeley, H.G. 1882. On Thecospondylus horneri, a new dinosaur from the Hastings Sand, indicated by the sacrum and the neural canal of the sacral region. Geological Magazine,

Optical absorption is omnipresent and often distributed non-uniformly in space. We present a numerical study on the effects of inhomogeneous absorption on transmission eigenchannels of light in highly scattering media. In the weak absorption regime, the spatial profile of a transmission channel remains similar to that without absorption, and the effect of inhomogeneous absorption can be stronge...

introduction movement of sand dunes is an important natural threat in the coast of oman sea. now many rural settlements of the region are in threat, and vulnerability has caused heavy losses. the sand dunes are visible in the wide area and wind erosion occurs in a wide spatial scale. wind erosion faces high intensity in the area, because of poor vegetation, low rainfall, dry soil, strong and co...

The aim of the present review is to give relevant information on aspects of the biology and ecology, including the vectorial competence of Lutzomyia sand fly species suggested as vectors of American cutaneous leishmaniasis in Brazil. The disease, due to Leishmania (Viannia) braziliensis, has been registered in most municipalities in all the Brazilian states and its transmission is associated wi...

Title of Dissertation: DEVELOPING HIGHLY ACCURATE AND STABLE OPEN-REGION ELECTROMAGNETIC SIMULATIONS Xin Wu, Doctor of Philosophy, 2003 Dissertation directed by: Assistant Professor Omar M. Ramahi Department of Mechanical Engineering, and Department of Electrical and Computer Engineering In open-region electromagnetic simulations, the computational domain has to be truncated by an absorbing bou...