This paper describes how the bootstrap approach to statistics can be applied to the evaluation of IR effectiveness metrics. More specifically, we describe straightforward methods for comparing the discriminative power of IR metrics based on Bootstrap Hypothesis Tests. Unlike the somewhat ad hoc Swap Method proposed by Voorhees and Buckley, our Bootstrap Sensitivity Methods estimate the overall ...

We provide a detailed study of the application of wireless sensor networks to a real-world building management system. A set of design requirements was discussed for the development of a sensor network architecture for an HVAC control system. We propose a system architecture that can be easily integrated into any existing building control system. We implemented a testbed to evaluate control str...

Over the last few years, research in the area of mobile ad hoc networks (MANETs) has focused on routing protocol performance improvements, security enhancements, power consumption optimizations, and quality of service metrics. The availability of sophisticated network simulation tools, such a NS2 and GloMoSim, has allowed researchers to study MANETs without purchasing the mobile nodes themselve...

The intrusion detection systems (IDS) are usually designed to work on local networks. However, with the development of mobile networks and their applications, it became necessary to develop new architectures for IDSs to act on these networks in order to detect problems and ensure the correct operation of data communications and its applications. This paper presents a distributed IDS model for m...

This thesis describes a number of advances made in order to produce a mobile object framework that is better suited for use in ad hoc networks than its predecessors. The focus of this thesis is on improving the performance, transparency and reliability of the mobility subsystem, which is responsible for the migration of objects from one device to another. Based on a comprehensive review of the ...

Using ad hoc networks as alternative means of communication in disaster situations is a salutary solution. However, analysing application performance is mandatory for evaluating such a possibility. In this paper we present the two aspects of our approach to application performance assessment on wireless ad hoc networks. The first aspect refers to real-world tests in which we quantify objectivel...

In last week’s lecture we came across an example, from Field (2013), about the drug Viagra, which is a sexual stimulant (used to treat impotence), which is supposed to make men better lovers. Suppose we tested this belief by taking three groups of people and administering one group with a placebo (such as a sugar pill), one group with a low dose of Viagra and one with a high dose. The dependent...

Wireless networks with autonomous mobile nodes, called ad hoc networks, have become increasingly interesting with the growth of wireless communication technologies. Several proposals for protocols to handle routing in such environments are under consideration by the Mobile Ad Hoc Networks (MANET) Working Group of the IETF. Simulations have been the driving force in development and evaluation of...

The statistical comparison of multiple algorithms over multiple data sets is fundamental in machine learning. This is typically carried out by the Friedman test. When the Friedman test rejects the null hypothesis, multiple comparisons are carried out to establish which are the significant differences among algorithms. The multiple comparisons are usually performed using the mean-ranks test. The...