Search results for "Simulation."

Vulnerability evaluation of distributed reputation management systems

2017

In distributed environments, Reputation Management Systems (RMSs) aim to estimate agents' trustworthiness by exploiting different sources of information. The distributed nature of these systems makes them vulnerable to several types of security attacks, and the response provided by a specific RMS depends on various factors, such as the algorithms adopted for estimating the reputation values and the communication protocols used to enable the cooperation among agents. This work examines the most important security attacks against RMSs and proposes a set of metrics for a quantitative evaluation of the RMS vulnerabilities. A parallel simulation framework is used to automatically give a vulnerab…

Evaluating Correlations in IoT Sensors for Smart Buildings

2021

International audience; In this paper we introduce a dataset of environmental information obtained via indoor and outdoor sensors deployed in the SMART Infrastructure Facility of the University of Wollongong (Australia). The acquired dataset is also made open-sourced along with this paper. We also propose a novel approach based on an evolutionary algorithm to determine pairs of correlated sensors. We compare our approach with three other standard techniques on the same dataset: on average, the accuracy of the evolutionary method is about 62,92%. We also evaluate the computational time, assessing the suitability of the proposed pipeline for real-time applications.

Telenoid android robot as an embodied perceptual social regulation medium engaging natural human–humanoid interaction

2014

The present paper aims to validate our research on human-humanoid interaction (HHI) using the minimalist humanoid robot Telenoid. We conducted the human-robot interaction test with 142 young people who had no prior interaction experience with this robot. The main goal is the analysis of the two social dimensions (''Perception'' and ''Believability'') useful for increasing the natural behaviour between users and Telenoid. We administered our custom questionnaire to human subjects in association with a well defined experimental setting (''ordinary and goal-guided task''). A thorough analysis of the questionnaires has been carried out and reliability and internal consistency in correlation bet…

Investigating Perceptual Features for a Natural Human - Humanoid Robot Interaction Inside a Spontaneous Setting

2013

The present paper aims to validate our research on human-humanoid interaction (HHI) using the minimalistic humanoid robot Telenoid. We have conducted human-robot interactions test with 100 young people with no prior interaction experience with this robot. The main goal is the analysis of the two social dimension (perception and believability) useful for increasing the natural behavior between users and Telenoid. We administrated our custom questionnaire to these subjects after a well defined experimental setting (ordinary and goal-guided task). After the analysis of the questionnaires, we obtained the proof that perceptual and believability conditions are necessary social dimensions for a s…

Motor simulation via coupled internal models using sequential Monte Carlo

2011

We describe a generative Bayesian model for action understanding in which inverse-forward internal model pairs are considered 'hypotheses' of plausible action goals that are explored in parallel via an approximate inference mechanism based on sequential Monte Carlo methods. The reenactment of internal model pairs can be considered a form of motor simulation, which supports both perceptual prediction and action understanding at the goal level. However, this procedure is generally considered to be computationally inefficient. We present a model that dynamically reallocates computational resources to more accurate internal models depending on both the available prior information and the predic…

Hunter-GatHerer Game: uno strumento simulativo dei comportamenti di caccia/raccolta nel mondo paleolitico

2013

In this paper we present the Hunter-Gatherer Game, a computer simulation of an environment where the individual and group survival depends on the ability to capture a prey or to find edible vegetables. The instrument is based on the Darwinian Hunter-Gatherer Theory stating that, during the Palaeolithic age, natural selection designed different gender preferences for foraging strategies (hunting in men and gathering in women), which are still sculpted in our modern brains. At present we are using the Hunter-Gatherer Game in order to experimentally test the above-mentioned theory, even though it also encompasses a number of potential applications.

Smoothed Particle Electromagnetics Modelling on HPC-GRID Environment

2012

In this paper a meshless approach on a high performance grid computing environment to run fast onerous electromagnetic numerical simulations, is presented. The grid computing and the message passing interface standard have been employed to improve the computational efficiency of the Smoothed Particle Electromagnetics meshless solver adopted. Applications involving an high number of particles can run on a grid computational environment simulating complex domains not accessible before and offer a promising approach for the coupling of particle models to continuous models. The used meshless solver is straightforward to program and fully parallelizable. The results of the parallel numerical sch…

Turning a business idea into a real business through an entrepreneurial learning approach based on dynamic start-up business model simulators

2017

In this paper we argue that the use of System Dynamics modelling applied to Business Model design and representation may result in an entrepreneurial learning approach to support potential entrepreneurs in exploring and learn how a business operates and reacts according to alternative strategic choices. As such, a Dynamic Business Modelling approach provides useful insights to start-up entrepreneurs learning processes by capturing and explaining how critical Business Model elements interact to produce enduring competitive advantages over time.

DESIGNING OUTCOME-BASED PERFORMANCE MANAGEMENT SYSTEMS THROUGH SYSTEM DYNAMICS MODELLING TO FRAME CORRUPTION BEHAVIOUR IN PUBLIC PROCUREMENT

Corruption is one of the most significant problems facing Serbia. While there are some signs that corruption may have become less rampant in recent years, available evidence suggests that corruption levels are still high while trust in key institutions is low (European Commission, 2014). This phenomenon is ubiquitous and has serious consequences on a country’s public welfare. Numerous conducted studies have mainly focused on specific characteristics such as economic issues, legal issues, social propositions, impact on national development, and about economic policy. The rationale of this research is to concentrate on a specific Anti-Hail Public Service provider in Serbia by not only explori…

Prevention and Mitigation of Rural Higher Education Dropout in Colombia: A Dynamic Performance Management Approach.

2023

Background: Dropout in higher education is a socio-educational phenomenon that has the scope to limit the benefits of education as well as to widen social disparities. For this reason, governments have implemented various public policies for its prevention and mitigation. However, in rural populations, such policies have proven to be ineffective. The aim of this paper is to simulate public policy scenarios for the treatment of school dropout in rural higher education in Colombia from a Dynamic Performance Management approach. Methodology: To achieve the aim, a parameterised simulation model was designed with data from Colombian state entities in rural higher education. Five simulations were…