In most studies, braking of vehicle in a straight path has been considered. When vehicle moves in a curved path, the effect of camber angle and fork angle should be considered. The variable camber angle assists braking in a curved road but the turning radius of vehicle changes due to varying camber angle and fork angle. The antilock braking system (ABS) is used for enhancing vehicle directional...

We present a parallel path planning method that is able to automatically handle multiple goal configurations as input. There are two basic approaches, goal switching and bidirectional search, which are combined in the end. Goal switching dynamically selects a favourite goal depending on some distance function. The bi-directional search supports the backward search direction from the goal to the...

In this paper, we address the inverse problem of reconstructing a scene as well as the camera motion from the image sequence taken by an omni-directional camera. Our structure from motion results give sharp conditions under which the reconstruction is unique. For example, if there are three points in general position and three omni-directional cameras in general position, a unique reconstructio...

With the rapid growth of large graphs, we cannot assume that graphs can still be fully loaded into memory, thus the disk-based graph operation is inevitable. In this paper, we take the shortest path discovery as an example to investigate the technique issues when leveraging existing infrastructure of relational database (RDB) in the graph data management. Based on the observation that a variety...

This paper discusses the possibility of deploying a shortrange cognitive radio (secondary communication system) within the service area of a primary system. Although the secondary system interferes with the primary system, there are certain locations in the service area of the primary system where the cognitive radio can reuse the frequency of the primary system without causing harmful interfer...

Novel preventive link maintenance scheme based on directional antennas has been proposed to extend the life of the link for multihop infrastructureless networks such as Mobile Ad Hoc Networks (MANET). We use the ability of directional antennas to orientate radio signals into the desired directions. We investigate preventive link maintenance scheme to on-demand routing algorithms. The scheme of ...

Several routing schemes have been proposed in the context of mobile ad hoc network. Some of them use multiple paths simultaneously by splitting the information among multitude of paths, as it may help to reduce end-to-end delay and perform load balancing. Multipath routing also diminishes the effects of unreliable wireless links in the constantly changing topology of ad hoc networks to a large ...

This paper investigates the syntactic and semantic differences between two types of directional locatives: (i) Goal locatives (e.g., into the house) and (ii) Source locatives (e.g., from the house). We identify their contrastive syntactic behavior in various constructions, and account for their asymmetry by assigning them two distinct underlying base positions. Furthermore, we argue that their ...

Emerging telecommunication technologies like 5G, green communications, and massive MIMO contribute to the use of directional antennas and beamforming. For this reason, modern propagation models should consider directional antennas with different beam widths, gains and radiation pattern directions. Most of the available propagation models are based on omnidirectional or isotropic antennas. A pro...

Map information is important for path planning and self-localization when mobile robots accomplish autonomous tasks. In unknown environments, mobile robots should generate an environment map by themselves. Then, we propose a method for construction of the 3D environment model by a mobile robot. The method is based on structure from motion. We use a single omni-directional camera to measure the ...