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SEcure Neighbor Discovery : a cryptographic solution for securing IPv6 local link operations
No full textSEcure Neighbor Discovery (SEND) was proposed to counteract threats to the Neighbor Discovery Protocol (NDP). It is a strong security extension that can make the IPv6 local link very safe. SEND
relies on dynamically Cryptographically Generated Addresses (CGAs) and X.509 certificates. However, SEND is not easily deployed and is still vulnerable to some types of attacks. This chapter evaluates the
practical considerations of a SEND deployment taking a cryptographic approach as a means of securing the IPv6 local link operations. It reviews the remaining vulnerabilities and gives some recommendations with which to facilitate SEND deployment
A six-axis single-stage active vibration isolator based on Stewart platform
No full textThis paperreports on a six-axis vibration isolatorforspace applications. It is divided
into three parts. The first part recalls the principles of active isolation and summarizes the main
theoretical results for multiple-axis decentralized control based on force feedback. The second
part discusses the technology and describes the evolution of the design over the five years of
thise project. The third part is devoted to the identification of the transmissibility matrix and
the performance evaluation; zero-gravity tests in parabolic flight are reported: the isolator is
proved efficient in a frequency band between 5 Hz and 400 Hz, with a maximum attenuation of
-40 dB between 50 Hz and 200 H
On parameter tuning in search-based software engineering: a replicated empirical study
No full textMultiobjective Evolutionary Algorithms are increasingly used to solve optimization problems in software
engineering. The choice of parameters for those algorithms usually follows the "default" settings, often accepted as "rule of thumb" or common wisdom. The fact is that each algorithms needs to be tuned for the problem at hand. Previous work [Arcuri and Fraser, 2011] has shown that variations in
parameter values had large effects on the performance of the algorithms. This project seeks to partially replicate the statistical analysis performed by Arcuri and Fraser. We seek to investigate the effects of parameter tuning on the performance of the two algorithms: Indicator-Based Evolutionary Algorithm (IBEA), and Nondominated Sorting Genetic Algorithm (NSGA-II) when applied to the problem of configuring Software Product Lines (SPLs) in the presence of stakeholder preferences such as cost
and reliability. The results of this study confirm and strengthen the findings in the original study by Arcuri and Frase
The traditional names for land markers and of protective establishments of land produce in the Palestinian colloquial
No full textMany economic establishments were erected, either inside buildings or in the &elds of the Palestinian countryside. These establishments were either of a permanent nature and operated continuously from harvest to harvest, or they were temporary in that they were built seasonally using any available
natural material, used and then dismantled. The establishment of these installations as measures of ownership or protection of crops, in urban and rural communities was carried out by peasants, craftsmen and shepherds whose lives were dependent on agricultural and pastoral economy. These
installations have played a signi&cant role in the economy of the areas because they were used in food production for local and commercial needs, to protect crops from birds, animals and thieves, to facilitate harvesting and threshing, for storage of produce after the harvests, and to mark the divisions
of the land. As some of these installations have belonged to families over many generations and continue to operate in the present day, many of them still use the traditional working method of animal labour. However, many others have incorporated technology into their ways of working and
replaced animals with mechanical equipment
