Soil samples were collected with distance at 5, 20, 40, 80, 160, and 320 m from the Shen-Ha (Shenyang-Harbin) Highway, Northeast China, to investigate the effect of heavy metals of highway origin on soil nematode guilds. The contents of soil Pb, Cu, Zn, and the nematode community structure were analyzed. The results showed that the contents of total and available Pb, Cu, Zn varied significantly...

22 23 Implementation of highway-rail grade crossing warning systems, educational programs and 24 research on crossings have all contributed to a steady reduction in the risk to highway users of 25 grade crossings over the past several decades. Much less attention has been given to 26 understanding the effect of grade crossings on train safety and risk. Collisions at highway-rail 27 grade crossi...

In recent years, mixed or/and augmented reality,which aims to integrate virtual space with real space have be received a significant amount of attention in research and development. In particular, tangible interface is one of the interesting research growth areas. The hypothesis of this research project is that the introduction of a tangible interface should assist designers and planners to rec...

A highway H is a line in the plane on which one can travel at a greater speed than in the remaining plane. One can choose to enter and exit H at any point. The highway time distance between a pair of points is the minimum time required to move from one point to the other, with optional use of H. The highway hull H(S,H) of a point set S is the minimal set containing S as well as the shortest pat...

This is to certify that I have examined this copy of a master's thesis by WEI CHEN and have found that it is complete and satisfactory in all respects, and that any and all revisions required by the final examining committee have been made. Principal Investigator of this project, for his inspiration and direction on this research. Throughout my study in University of Minnesota, he provided pati...

Adequate highways are of vital concern to every citizen of Indiana. They are an integral part of modern life. They provide the most impor­ tant means of bringing people together— of permitting anyone to live a full and happy life. Providing adequate highways within the limitations of funds provided, knowledge available and time required is the respon­ sibility which the public has assigned thro...

human factors issues associated with roadway design and operations are critical components of improving highway safety. first, the three major components of highway safety are driver behavior, vehicle safety, and roadway safety. the general philosophy in roadside safety follows the priorities of (1) remove the hazard, (2) relocate the hazard, (3) make the hazard forgiving, and (4) shield the ha...

contrary to the past approaches, as the transportation speed and the number of vehicles have increased, nowadays, the major roads do not go through the cities and are laid out on the brink with a particular distance instead and linked with the city’s network through a set of connecting roads instead. construction of these connecting roads can have diverse effects on economic, social and cultura...

The aim of this research is to examine the market potential for wood plastic composite (WPC) products in the highway construction sector in place of nonrenewable materials (e.g. virgin plastic and steel) and preservative-based products (treated wood). State-level transportation officials indicate that the majority of highway construction purchases are conducted by highway construction contracto...

in today's competitiveenvironment, customers are the most important asset to any company. therefore,in order to retain customers, it is essential to understandtheirbehaviour for developing effective strategies. one of the most commonmethods for customer analysis is market segmentation that helps companies todevelop marketing technique by dividing market into several smaller homogeneousgrou...