Probabilistic Collision Avoidance for Long-term Space Encounters via Risk Selection

This paper is a report on some early findings of a long-term study which has the ambitious objective of suggesting better alternative solutions to the general problem of controlling a collection of aircraft. The study aims to answer questions about the optimum division of responsibility between the aircrew and ground A.T.C., about the way in which the A.T.C. tasks are shared between a number of controllers and A.T.C. computers, and about the fundamental principles on which traffic flow is organized.

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Conflict Resolution in Robotics

Advances in Linguistics and Communication Studies - Interdisciplinary Perspectives on Contemporary Conflict Resolution ◽

10.4018/978-1-5225-0245-6.ch015 ◽

2016 ◽

pp. 263-278 ◽

Cited By ~ 1

Author(s):

Ester Martinez-Martin ◽

Angel P. del Pobil

Keyword(s):

Conflict Resolution ◽

Collision Avoidance ◽

Autonomous Systems ◽

Critical Issue ◽

Human Beings ◽

Repetitive Tasks ◽

Robot Cooperation ◽

Robotic Tasks ◽

Crowded Environments

A long-term goal in Robotics is developing autonomous systems able to assist and support human beings, especially in hazardous and/or repetitive tasks. So, these robotic systems will share their workspace with other robots, people or both of them, possibly having different goals and needs. This fact may result in a conflict that should be solved for properly achieving the intended goals. However, there is no a universal way to do it since different scenarios and behaviours lead to different kinds of conflicts. In addition, execution time is a critical issue in the Robotics field and has to be taken into account when a conflict resolution technique is developed. In this chapter we will discuss the state-of-the-art algorithms applied to several robotic tasks from assembly and disassembly in industrial settings to multi-robot cooperation through collision avoidance in unstructured, crowded environments. So, a deep analysis will highlight approach's applications and utilities, as well as their limitations.

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The Proposed Revision of the Collision Regulations

Journal of Navigation ◽

10.1017/s0373463300027041 ◽

1972 ◽

Vol 25 (4) ◽

pp. 427-443 ◽

Cited By ~ 1

Keyword(s):

Collision Avoidance ◽

Working Party ◽

Technical Committee ◽

International Conference ◽

Safety Committee ◽

International Regulations ◽

Open Session ◽

The Subject ◽

Set Up

In October this year an international conference on the revision of the International Regulations for Preventing Collisions at Sea will be held in London. A working party appointed by the Maritime Safety Committee of Imco, under the chairmanship of Captain A. C. Manson of the Department of Trade and Industry, has drawn up proposals for the revision of the present regulations. Captain Manson described these proposals to an open session of the Technical Committee held in London on 17 May 1972 with Captain D. A. G. Dickens, an Elder Brother of Trinity House, in the Chair. Introducing the subject the Chairman said that the Institute, through its Journal, the discussions it had promoted on previous occasions, and through the working party set up in 1970, had taken a significant part in forming opinion on the issues involved. In particular perhaps it had ventilated the suggestions that collision avoidance might better be based on positive manœuvring instructions rather than by simply apportioning responsibility. The long-term influence of these suggestions may well be considerable even though they might not in the event be reflected in the Rules now being proposed.

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Revision of the Collision Regulations: An Interim Report

Journal of Navigation ◽

10.1017/s0373463300020701 ◽

1970 ◽

Vol 23 (4) ◽

pp. 448-455 ◽

Cited By ~ 1

Keyword(s):

Collision Avoidance ◽

Working Party ◽

Point Of View ◽

Final Report ◽

Interim Report ◽

New Approach ◽

Precise Form ◽

Safety Committee ◽

The Subject

The Collision Regulations are due for revision by Imco in 1972 and already governments and other agencies are formulating proposals for consideration by its Maritime Safety Committee. The Institute's working party on the subject, which was formed initially to try to lessen the area of disagreement between people who had put forward positive proposals over the last few years, has now formed a cohesive view and formulated a set of recommendations. These are given in the interim report which follows. In the normal course of events things would have been allowed to run their course and the final report published only after further meetings of the working party which has still to reach firm conclusions on a number of points (for example on the precise form of the manœuvring diagram referred to at the end of Section 2 and in proposition (14), and on the whole question of lights). However, time is short and it seems probable that if the views of the working party are to have any effect on the deliberations of Imco, they must be made known straight away. The report (of which M. W. Richey is the author), therefore, which embodies the whole area of agreement between the members of the working party, is published here in interim form.Dr. Calvert has expressed some unease from his own point of view about propositions (1) to (19) and it is hoped in the final report to publish an appendix by him suggesting a totally new approach to the whole problem of collision avoidance by manœuvre. It is hoped also to publish an appendix by Admiral García Frías describing the system he proposes. Both these contributions are perhaps likely to be of long-term rather than immediate significance.

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Can Risk Adjustment Prevent Risk Selection in a Competitive Long-Term Care Insurance Market?

SSRN Electronic Journal ◽

10.2139/ssrn.2202170 ◽

2013 ◽

Cited By ~ 2

Author(s):

Pieter Bakx ◽

Erik Schut ◽

Eddy van Doorslaer

Keyword(s):

Risk Adjustment ◽

Long Term Care ◽

Insurance Market ◽

Risk Selection ◽

Term Care ◽

Long Term Care Insurance

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Risk Selection and Risk Adjustment: Improving Insurance in the Individual and Small Group Markets

INQUIRY The Journal of Health Care Organization Provision and Financing ◽

10.5034/inquiryjrnl_46.2.215 ◽

2009 ◽

Vol 46 (2) ◽

pp. 215-228 ◽

Cited By ~ 5

Author(s):

Katherine Baicker ◽

William H. Dow

Keyword(s):

Risk Adjustment ◽

Lower Cost ◽

Insurance Coverage ◽

Risk Selection ◽

Risk Pooling ◽

Cream Skimming ◽

Risk Protection ◽

The Individual ◽

Promising Avenue

Insurance market reforms face the key challenge of addressing the threat that risk selection poses to the availability of stable, high-value insurance policies that provide long-term risk protection. Many of the strategies in use today fail to address this breakdown in risk pooling, and some even exacerbate it. Flexible risk adjustment schemes are a promising avenue for promoting market stability and limiting insurer cream-skimming, potentially providing greater benefits at lower cost. Reforms intended to increase insurance coverage and the value of care delivered will be much more effective if implemented in conjunction with policies that address these fundamental selection issues.

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Simulation analysis of a collision-tolerant micro-airship fleet

International Journal of Micro Air Vehicles ◽

10.1177/1756829317705326 ◽

2017 ◽

Vol 9 (4) ◽

pp. 297-305 ◽

Cited By ~ 4

Author(s):

Brandon Troub ◽

Brandi DePineuil ◽

Carlos Montalvo

Keyword(s):

Collision Avoidance ◽

Simulation Analysis ◽

Control Logic ◽

Viable Option ◽

Design Constraint ◽

Precise Control ◽

Aerial Vehicle ◽

Three Degree Of Freedom ◽

Important Design

This paper analyzes the performance of a micro-airship fleet (0.5 m diameter) to navigate indoors with waypoint control while tolerating collision between airships and the environment. Very little focus has been placed on studying airships in groups or how well they can rebound back into formation after a collision. With a micro-airship fleet, it is possible to remove the major problem of collision avoidance in multi-unmanned aerial vehicle missions, which can result in damage or even mission failure when other types of aircraft are used. These vehicles could be a viable option for missions where speed and precise control are not an important design constraint, such as indoor reconnaissance or long-term surveillance. A three degree of freedom simulation is created in which five airships are commanded to waypoints throughout a hall way. The control logic used involves independent proportional–derivative control without any communication between airships. Collisions occur during missions; thus, a contact model is included in the simulation to model these effects. Airship parameters were estimated using an actual airship to assure the simulation is accurate. The results show that the airships are able to navigate to their destinations even after several collisions.

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