This paper reports the results of a study carried out by Helios for the General Lighthouse Authorities of the UK & Ireland into developments in collision avoidance systems, how they will influence the future development of marine aids to navigation and how they fit into the concept of e-Navigation. Collision avoidance is considered in the wider sense of preventing groundings and striking fixed ...

The association between place of residence, population density, relief and type of event (collision or non-collision of the vehicle) has not been evaluated in developing countries. The main objective of this study is to determine the differential factors associated with the occurrence of deaths of collision and non-collision automobile users in Patagonia, Argentina. A multiple logistic regressi...

Red blood cell aggregation at low flow rates increases venous vascular resistance, but the process of aggregate formation in these vessels is not well understood. We previously reported that aggregate formation in postcapillary venules of the rat spinotrapezius muscle mainly occurs in a middle region between 15 and 30 microm downstream from the entrance. In light of the findings in that study, ...

Discretized distance maps have been used in robotics for path planning and eecient collision detection applications in static environments 1]. However, they have been used at the nest level of resolution, thereby making them memory intensive. In this paper, we propose an octree-based hierarchical representation for discretized distance maps, called Octree Distance Maps (ODM), and show its use i...

CONTEXT Collision tumors are very rare entities composed of two or more distinct tumor components, each separated by normal tissue. Perhaps due to technical advances in the last decade, the incidence of collision tumors has been on the rise. To the best of our knowledge, collision tumors featuring mantle cell lymphoma and pancreatic adenocarcinoma have not been previously described in the scien...

In this paper, a novel methodology for computing a collision-free trajectory for mobile robots amidst moving objects is presented. This planner is based on a new technique for computing the minimum translational distance between two mobile objects. This distance is then used for predicting and avoiding a collision. The computation of this distance is based on the application of the GJK algorith...

Anti-collision at sea is technically difficult to realize as it involves the complex interaction between human navigators, ships and surrounding topographical environment. Collision avoidance should be conducted by human navigators. This paper proposes a way to graphically present relevant information for collision avoidance to help the human navigators’ decision making. The display can provide...

In road traffic accidents, the analysis of a vehicle's collision angle plays a key role in identifying a traffic accident's form and cause. However, because accurate estimation of vehicle collision angle involves many factors, it is difficult to accurately determine it in cases in which less physical evidence is available and there is a lack of monitoring. This paper establishes the mathematica...

Vehicle collisions are complex processes which are determined by a large number of different parameters. The development of computer programs for simulation has made the collision analysis and reconstruction procedure easier, as well as the possibility to realise the influences of different parameters on collision processes, which was not possible while using classical methods. The quality of r...

A stochastic droplet collision model (Sommerfeld [9]), based on the creation of a fictitious collision partner is described, taking into account impact efficiencies. The model of O’Rourke [5] is considered to predict the outcome of water-droplet collisions, being grazing or coalescing, and to predict post-collision velocities. The relevance of impact efficiencies is discussed for water droplet ...