Positioning a node in Vehicular Ad-Hoc networks is one of the most interested research areas in recent years. In many Ad-Hoc networks such as Vehicular Ad-Hoc networks in which the nodes are considered as vehicles, move very fast in streets and highways. So, to have a safe and fast transport system, any vehicle should know where a traffic problem such as a broken vehicle occurs. GPS is one of t...

This paper deals with the problem of multimedia streaming for mobile users. In particular users are thought as part of a group of customers located into a common public vehicle, e.g. a train or a bus connected to the network via a satellite link, and requesting either video-on-demand-like services, or (slightly deferred) real-time diffusive streaming services. This work is built on a proposal o...

Ultrafine vehicular particle (<100 nm) number size distributions presented in the literature are mostly averages of long scan-time (∼30 s or more) spectra mainly due to the non-availability of commercial instruments that can measure particle distributions in the <10 nm to 100 nm range faster than 30 s even though individual researchers have built faster (1–2.5 s) scanning instruments. With the ...

VANETS is the most popular network which is called Vehicular Ad Hoc Network. The researchers make a lot of work in this network. From the Literature review, VANETs works on the basis of real time system where the vehicles are moving nodes and travel with a very high speed on the roads in the urban areas. There are many security issues like authentication, tunnel attacks, intelligent system appr...

To study the origins of airborne particulate organic matter in southern Ontario, molecular marker concentrations were studied at Hamilton, Simcoe, and York Gateway Tunnel, representing industrial, rural, and heavy traffic sites, respectively. Airborne particulate matter smaller than 10 μm in aerodynamic diameter was collected on quartz filters, and the collected samples were analyzed for total ...

We identified 13 historical measurements of polycyclic aromatic hydrocarbons (PAHs) in U.S. vehicular traffic tunnels that were either directly presented as tailpipe emission factors in microg per vehicle-kilometer or convertible to such a form. Tunnel measurements capture fleet cruise emissions. Emission factors for benzo[a]pyrene (BaP) for a tunnel fleet operating under cruise conditions were...

A framework is proposed for long-term vehicular channel simulation based on the vector time-frequency autoregressive (VTFAR) model a sparse parametric description of nonstationary multivariate random processes. Based vehicle-to-infrastructure tunnel measurements, we estimate VTFAR parameters and validate by comparing non-parametric spectra measured in terms delay spread stationarity time. In ad...

Vehicular ad hoc network (VANET) brings an excellent solution to ensure road safety and transportation efficiency in critical environment like tunnel. Particularly, radio link connectivity of vehicle-to-vehicle (V2V) significantly influences the performance VANETs. The communication range systems is a random variable reality due channel fading effect. Therefore, model between vehicles realistic...