This study investigates the distributions of velocity and Reynolds stress in an artificial pool-riffle sequence for two entrance slopes 5° 20° a laboratory compares results with similar gravel-bed river central Iran. Quadrant analysis is applied to find out contributions different events on turbulent flow structures. At slope 5°, distribution follows exponential trend without separation, but 20...

THIS case of a coloboma of the optic nerve entrance is recorded because of the great scarcity of previous histological reports. Only very rarely is a coloboma found to be restricted to the optic nerve entrance (Duke-Elder, 1964); the great majority affect the adjacent choroid as well. Many of the early reports concerned eyes from animals or from anencephalic stillborn infants. These as well as ...

Bridge structures are vital for majority of Sudanese due to the fact that they live besides rivers, valleys and inside islands. construction is faced by it extremely expensive. Cost such affected load which accordingly dictates required dead Loads from both superstructure substructure. In this analytical study a light bridge derived making use AASHTO principles. This practical data collected se...

Presence of salts in water has been one of the biggest problems of industrial equipment such as evaporators, boilers, and pipes. These salts gradually form scales on evaporators and boilers tubes and reduce their efficiency. Pretreatment processes are conducted to remove these salts; with sedimentation tanks being one of the essential equipment used in these processes. This study numerically si...

the fish assemblage and diversity in relation to water quality of three coastal rivers sita, swarna and varahi of udupi district, karnataka, india was studied. 71 species representing 7 orders, 20 families and 41 genera were recorded from 21 sites along the three rivers. species composition varied longitudinally in relation to the environmental factors of the habitat. the downstream change in t...

Rivers are important water resources for human life, but sometimes cause irreparable damages. The flood plains are fertile terrains which are endangered by flood. Flood hazard mapping is one of the basic methods in flood fighting. In order to decline flood damages, the simulation of the hydraulic behavior of the rivers during flood occurrence is very important. In this study, areas that are flo...

introduction water vapor can spread in molecular, unstable and erratic phase and can also transfer by convection and advection process. this transfer happens from the earth and ocean surfaces to the atmosphere in hot air. this type of transfer is considered as the main pattern. in the studies of the atmosphere, one of the prominent factors to be considered is the complexity of water vapor and i...

Social insect colonies use interactions among workers to regulate collective behavior. Harvester ant foragers interact in a chamber just inside the nest entrance, here called the 'entrance chamber'. Previous studies of the activation of foragers in red harvester ants show that an outgoing forager inside the nest experiences an increase in brief antennal contacts before it leaves the nest to for...