The first-order schemes used for discretisation of the convective terms are straightforward and easy to use, with the drawback of introducing numerical diffusion. Application of the secondorder schemes, such as QUICK scheme, is a treatment to reduce the numerical diffusion, but increasing convergence oscillation is unavoidable. The technique used in this study is a compromise between the above-...

Recommender systems are one of the tools designed to help users deal with the information explosion by giving information recommendation according to their information needs. The cold-start problem refers to the situations where insufficient initial information of data sources for recommendations to make suggestions to users. When a new user extends into the system initially nothing is known ab...

Most large cities are spanned by more than one transportation system. These different modes of transport have usually been studied separately: it is however important to understand the impact on urban systems of coupling different modes and we report in this paper an empirical analysis of the coupling between the street network and the subway for the two large metropolitan areas of London and N...

We investigate higher-order Voronoi diagrams in the city metric. This metric is induced by quickest paths in the L1 metric in the presence of an accelerating transportation network of axis-parallel line segments. For the structural complexity of k-order city Voronoi diagrams of n point sites, we show an upper bound of O(k(n − k) + kc) and a lower bound of Ω(n+ kc), where c is the complexity of ...

Future mobile networks will offer a great variety of multimedia services. DiffServ is the promising framework standardized by the IETF to enhance the Internet with the essential quality of service. Unfortunately, transaction-oriented applications— the most popular class of applications—are not sufficiently supported yet. Quick Forwarding (QF) has been proposed to fill this gap between Expedited...

The desire for communication is every human being’s own. It lives in people’s mind whose own body deprives themselves of the possibility of relations between people. In the last few decades it was realized that not only the number of people who were kept alive is important, but also their quality of life. One of the base of the prosperities is the ability to adapting themselves to the community...

Determining an appropriate sending rate when beginning data transmission into a network with unknown characteristics is a fundamental issue in best-effort networks. Traditionally, the slow-start algorithm has been used to probe the network path for an appropriate sending rate. This paper provides an initial exploration of the efficacy of an alternate scheme called Quick-Start, which is designed...

We propose an end-to-end rate-based congestion avoidance scheme for ABR traac on ATM networks using explicit rate indication to sources. The scheme uses a new congestion detection technique and an O(1) switch algorithm to provide high thoughput, low queues, fair operation, quick convergence and a small set of well understood parameters.