There has been significant progress in the field of vehicular ad hoc networks (VANET) over the last several years which support vehicle-to-vehicle and vehicle-to-infrastructure communications. With the two types of communication modes, user can access the internet and existing mobility management can be reviewed. Mobility management and handoffs are the most challenging research issues for vehi...

the effect of underground cavities in site seismic response was studied over the subway tunnels that are under construction in the city of karaj, using ambient noise measurements as well as numerical modeling. the idea for this research comes from the observation of differences in experimental site transfer function, calculated on more than 100 locations of the city, for the areas near the unde...

The lining structure of Tunnel Boring Machine (TBM) excavated tunnels is composed of series of precast Reinforced Concrete (RC) pieces which are called segment. At the present paper, a novel method is introduced for seismic retrofitting of segmental tunnels located at active fault zones in rock environment with case study of Amirkabir dam to Tehran water transfer tunnel (Karadj tunnel). The mai...

This paper explores recent improvements in 802.11p multi-channel protocol in vehicular ad-hoc networks. We provide definitions for a vehicular network and explore the operation of 802.11 within a vehicular network. We also study on areas of improvements of this protocol and briefly discuss on advantages and disadvantages of each solution.

During the last few years, continuous progresses in wireless communications have opened new research fields in computer networking, aimed at extending data networks connectivity to environments where wired solutions are impracticable. Among these, vehicular communication is attracting growing attention from both academia and industry, owing to the amount and importance of the related applicatio...

In vehicular-to-roadside (V2R) communications of vehicular network, the bandwidth from roadside unit (RSU) can be shared among vehicular users to improve the utilization and reduce the cost. In this paper, the coalition game is formulated to model the situation in which multiple vehicular users can cooperate to share the bandwidth to RSU. First, the rational coalition formation is considered in...

The successful deployment of vehicular ad hoc networks (VANETs) has to overcome the serious security threats which impair the operation of different vehicular applications. This paper presents the vulnerabilities of vehicular ad hoc networks and analyzes some of the security problems inherent in VANETs and also presents proposed solutions to overcome some of the vulnerabilities and security pro...

abstract   background: the pathophysiology of carpal tunnel syndrome is associated with increased intracarpal canal pressure. recently, palmaris longus has been introduced as an independent risk factor for the development of carpal tunnel syndrome. the purpose of this study was to assess the association of carpal tunnel syndrome with the presence of palmaris longus tendon and functional superfi...

A vehicular ad hoc network (VANET) is a type of mobile network whose nodes are traveling cars which communicate with one another using short-range wireless communications. These cars can exchange and share different information among them, which can lead to the development of interesting applications that require the cooperation of vehicles or using the vehicular network as a distributed comput...