What does it mean to say that a physical network (such as a road network, electricity grid, or telephone network) is optimal? Different optimality criteria for different networks have been developed and studied. In the case of road networks connecting cities, an intuitive notion of an “optimal” network is one that provides the shortest routes between any two cities in the network while requirin...

of a thesis at the University of Miami. Thesis supervised by Associate Professor Dilip Sarkar. No. of pages in text. (37) A GPS system selects routes between two points with minimum physical distance or minimum driving time. Here we address a different type of route selection problem. Given a road map with driving distance and wireless connectivity for each road segment, find a driving route th...

Moving car on rough road suddenly gets out of its way for some reason and moves to the edge of the road at the same speed. Since the most important factor in car overturning is vertical acceleration in the wheels and car speed and road conditions determine the vertical instantaneous acceleration, brake system according to change of the spring length is designed in such a way that by monitoring ...

BACKGROUND The increasing number of older road users represents a public health issue because older individuals are more susceptible to traffic injury and mortality than the general population. This study investigated the association between socio-demographic factors and traffic injury and traffic mortality for the general population and among older road users in Japan. METHODS An ecological ...

the optimum road spacing has been studied by many researches. it is an important step of forest road network planning. the goals of this study are determining the optimum road spacing in kheiroudkenar forest of nowshahr in northern iran and study of effect of kind of skidder on skidding cost and road spacing. continues time study method was used to determine the production rate of taf and timbe...