A process that determines whether two or more bodies make contact at one or more points is called contact detection or collision detection. Contact detection is inseparable part of the computer graphics, surgical simulations, and robotics etc. There are large of methods that are used for collision detection. We will review a few of the most common ones. Algorithms for contact determination can ...

To improve the H(-) ion beam optics, it is necessary to understand the energy relaxation process of surface produced H(-) ions in the extraction region of Cs seeded H(-) ion sources. Coulomb collisions of charged particles have been introduced to the 2D3V-PIC (two dimension in real space and three dimension in velocity space particle-in-cell) model for the H(-) extraction by using the binary co...

To anti-collision problem of multiple tags of RFID in ETC (Electronic Toll Collection) system, a novel BBS (Backtracking Binary-tree Search ) anti-collision algorithm is proposed in working in UHF (5.8G) based on the DBS (Dynamic Binary-tree Search) and RSBS (Random Split Binary-tree Search) to solve the only one bit collision in inquiry. The BBS algorithm can reduce twice inquiry process. The ...

one of the most dazzling events in the atmosphere is lightning. during updrafts in the life cycle of cumulus clouds, collision of graupels and ice crystals in the presence of liquid water results in vertical separation of electrical charges and lightning. there are four types of lightening depending on the location of discharge. the first type is cloud-to-ground lightning or fork lightning that...

ion–atom collision processes is important in atomic physics. It helps us fundamentally understand particle interactions and the corresponding dynamics for applications in many subfields, such as fusion sciences, astrophysics, and material sciences. Furthermore, it presents an interesting problem as the basic physics. Energetic collision of two particles can produce processes; for example, ion– ...

We study pursuit-evasion games for mobile robots and their applications to collision avoidance. In the first part of the paper, under the assumption that the pursuer and the evader (possibly subject to physical constraints) share the same roadmap to plan their strategies, we present sound and complete strategies for three different games. In the second part, we utilize the pursuit-evasion resul...

According to the linear viscoelastic model, the population discrete elements under the vibration working condition of the seed tray of the seeder were assumed as rigid conditions to analyze the collision process. The dynamic characteristics among the population collision process for the vibration process of the seeder were analyzed by tracing the microcosmic motion of each seed. The following c...

We present different approaches for accelerating the process of continuous collision detection for deformable triangle meshes. The main focus is upon the collision detection for simulated virtual clothing, especially for situations involving a high number of contact points between the triangle meshes, such as multi-layered garments. We show how the culling efficiency of bounding volume hierarch...

We present a novel hardware architecture for a single-chip collision detection accelerator and algorithms for efficient hierarchical collision. We use a hierarchy of k-DOPs for maximum performance. A new hierarchy traversal algorithm and an optimized triangle-triangle intersection test reduce bandwidth and computational costs. The resulting hardware architecture can process two object hierarchi...

Avoiding collision of nano-particles during manipulation operations and selecting the best route and lowest Atomic Force Microscopy (AFM) movement are major concerns in the area of nano-space. To apply the lowest force on the cantilever from fluid environment forces, we try to minimize AFM movements. Our proposed method calculates the optimum routing for AFM probe movement for nano-particles tr...