We investigate how ideas from the International Environmental Agreement (IEA) literature can be applied to the problem of space debris mitigation. Space debris pollution is similar to other international environmental problems in that there is a potential for a ‘‘tragedy of the commons’’ effect: individual nations bear all the cost of their mitigation measures but share only a fraction of the b...

Annex 22 information based on the final reports of the project. In particular, no part of this publication may be reproduced, stored in a retrieval system or transmitted in any form or by any means, electronic, mechanical, photocopying, recording or otherwise, without the prior written permission of FaberMaunsell Ltd. Disclaimer Notice: This publication has been compiled with reasonable skill a...

damavand is a large dormant stratovolcano in the alborz mountains of northern iran located in one of the most populous provinces, which could be adversely affected by tephra fall from damavand. the youngest known eruption is a lava flow on the western flanks with an age of 7.3 ka. the volcanic products are predominantly porphyritic trachyandesite. three major young pumice deposits, named here a...

Recent post explosive control avalanches and the lack of analytical methods for evaluating explosive control have motivated this study to better quantify the effects explosives on snow. Currently, there are insufficient tools for predicting the effects that explosives will have on snow avalanche release. While there is significant practitioner experience, that experience has (on occasion) not a...

Longitudinal acceleration comfort is one of the essential metrics used to evaluate the ride comfort of train. The aim of this study was to investigate the effectiveness of using hand grip force as a correlate of longitudinal acceleration comfort of rapid transit trains. In the paper, a motion simulation system was set up and a two-stage experiment was designed to investigate the role of the gri...

Abstract International comparative assessments of student achievement are constructed to assess country-level differences and change over time. A coherent understanding the international trends in educational outcomes is strongly needed as suggested by numerous previous studies. Investigating these requires long-term analysis, substantial changes on system level rarely observed regarding short ...

This paper considers the following backup scheme for a database system: a database is updated at a nonhomogeneous Poisson process and an amount of updated files accumulates additively. To ensure the safety of data, full backup are performed at time NT=L or when the database fails, whichever occurs first, and between them, incremental backups are made at periodic times iT (i=1, 2, ..., N-1) so a...