http://popups.lib.uliege.be/1373-5411/index.php?id=2070 Index terms fr 0 http://popups.lib.uliege.be/1373-5411/index.php?id=4733 The goal of this project is to create a real-time based virtual plant for an easier automated re-scheduling of production plan. Consider a real system plant (steelmaking plant for our case study), with complex logistic for machines placement: the system needs a production order list and the initial plant status, then an initial optimized production planning is generated to satisfy orders. During the production, accidents or other contingencies are possible and an immediate production planning re-scheduling is needed. Introducing a virtual plant all significant events that modify the planned production story introducing delays (i.e. increasing the lead time), we can see the plant status in real-time and for all stored possible events (particularly accidents) the system calculates and shows a new optimized re-scheduled production plan. At the same time the proposed system is able to provide a cost reduction over the energy purchase by interacting actively with the free market. Mon, 14 Oct 2024 16:59:36 +0200 Mon, 14 Oct 2024 16:59:45 +0200 http://popups.lib.uliege.be/1373-5411/index.php?id=4733 http://popups.lib.uliege.be/1373-5411/index.php?id=4723 In applied mechanics several papers concentrate on the comparison of delayed and non-delayed approaches of controlled machines. We may study both continuous and discrete time systems, by using both numeric and analytic methods. These analytic methods are from the qualitative theory of differential equations like Lyapunov's indirect method, or the use of monodromy operator of discrete mappings and the basic bifurcation theory. The principal points of interest in the following work are how continuous time system differs from its representation as some discrete time system in stability and robustness and how the discretisation of a continuous time subsystem acts on the stability properties of the coupled system. Mon, 14 Oct 2024 16:51:23 +0200 Mon, 14 Oct 2024 16:51:33 +0200 http://popups.lib.uliege.be/1373-5411/index.php?id=4723 http://popups.lib.uliege.be/1373-5411/index.php?id=4622 To route the rescue service, the police and the ambulance during an emergency event, the command and control units need information about accessibility. When two countries are involved in the rescue work there is also a possibility to send rescue help from either country, which complicates the situation but of course gives a great opportunity. Good predictions for when rescue service are to appear at the scene of the emergency and from where to send them are of great importance. Different actions are to be taken due to the waiting time. Accessibility is a complex term which is further elaborated and conceptualized in the paper. The paper also presents tentative results for how to conceptualize and simulate accessibility in this crisis management setting. The results are based on empirical data from the region involved in the GSS project. Mon, 14 Oct 2024 15:30:10 +0200 Mon, 14 Oct 2024 15:30:20 +0200 http://popups.lib.uliege.be/1373-5411/index.php?id=4622 http://popups.lib.uliege.be/1373-5411/index.php?id=3254 This paper addresses the influence of information feedback on a decision process supported by a simulation model. A group of 118 graduate students participated in the experiment under four conditions : a1) decision making with application of the simulation model with pretest, a2) decision making with application of the simulation model and group information feedback with pretest, a3) decision making with application of the simulation model without pretest, and a4) decision making with application of the simulation model and group information feedback without pretest. The criteria function and number of simulation runs were observed. The hypothesis that decision-making using a simulation model and group feedback improve criteria function was confirmed. The model of learning during the decision process was developed. Fri, 13 Sep 2024 13:26:30 +0200 Thu, 10 Oct 2024 10:39:49 +0200 http://popups.lib.uliege.be/1373-5411/index.php?id=3254 http://popups.lib.uliege.be/1373-5411/index.php?id=2669 The use of games as testbeds for research projects in the Artificial Intelligence (AI) field is a tradition. Some classic board and card games such as Go, Chess and Checkers were and are extensively used. However, AI researchers are beginning to explore the use of real-time interactive computer games in their research, making this an interesting field to experiment and explore. This paper presents the SCORE project (Simulator for COgnitive agent's behavioR), where we use a Belief-Desire-Intention (BDI) agent specification formalism called X-BDI, applied to a game environment called, Unreal Toumament (UT). This paper also presents some aspects regarding AI and agent technology applied to interactive computer games, with emphasis in the application of cognitive agent modelling applied to game characters Thu, 29 Aug 2024 16:44:27 +0200 Tue, 08 Oct 2024 17:21:51 +0200 http://popups.lib.uliege.be/1373-5411/index.php?id=2669 http://popups.lib.uliege.be/1373-5411/index.php?id=2424 This paper deals with the Euler and Incursive algorithms of the nonlinear pendulum. The Euler algorithm is unstable. The incursive algorithms show a stable solution as an orbital stabilify for small values of the time step. For larger values of the time step, the incursive algorithms show an orbital stability for small values of the initial conditions and a chaotic sea for larger initial conditions. Tue, 20 Aug 2024 11:27:28 +0200 Tue, 08 Oct 2024 14:44:03 +0200 http://popups.lib.uliege.be/1373-5411/index.php?id=2424 http://popups.lib.uliege.be/1373-5411/index.php?id=2935 There is a problem to anticipate organization of services performed by an enterprise to its customer distributed in an array. At one part, the enterprise is interested to employ the minimum workers for that task, while at the other part the customers should be served as soon as possible after they send a message to the enterprise. Simulation of the variants viewed as materially possible, and then choosing the optimal one of them, is a good technique. A system that uses simulation is an anticipatory one and that anticipating the possible variants is also an anticipatory one, thus we meet nesting anticipatory systems. The anticipation of possible variants can be efficiently supported by applying object-oriented programming. That anticipation may pass over the design of one enterprise. The paper describes this technique and some illustrative examples. Tue, 03 Sep 2024 15:52:13 +0200 Tue, 08 Oct 2024 13:13:20 +0200 http://popups.lib.uliege.be/1373-5411/index.php?id=2935 http://popups.lib.uliege.be/1373-5411/index.php?id=2921 The paper concerns a project of implementing an intelligent information system. The intelligence should cover different aspects, namely reactions to some natural language directives and anticipatory self-organizing. At the start phase, programming tools that will be able to cover the simulation models of the design variants are made and tested. They are structured into four main levels, namely (1) that of the world with communication in fuzzy terms, (2) that concerning the world of repeated existence of systems (used for managing a simulation study), (3) that oriented to simulation of information systems ( used for managing individual simulation experiments), and (4) that directed to the anticipatory abilities of the simulated systems. The programming tools are implemented in SIMULA. Tue, 03 Sep 2024 15:51:17 +0200 Tue, 08 Oct 2024 13:12:34 +0200 http://popups.lib.uliege.be/1373-5411/index.php?id=2921 http://popups.lib.uliege.be/1373-5411/index.php?id=2918 The year of 2007 was a jubilee year, namely the anniversary of 40 years of the object-oriented programming (OOP). Nevertheless, when the first tool allowing application of the OOP paradigm was presented to the world professional community in 1967, it offered much more than the mentioned paradigm. The whole system of the offered tools was later called Super-Object-Oriented programming tools (SOOP). Its origin and its abilities have several intimate relations to computer simulation and to computing anticipatory systems. The properties of the OOP and of SOOP and their differing are presented in the paper and the relation to the computing anticipatory systems as well. Tue, 03 Sep 2024 15:50:46 +0200 Tue, 08 Oct 2024 13:11:53 +0200 http://popups.lib.uliege.be/1373-5411/index.php?id=2918 http://popups.lib.uliege.be/1373-5411/index.php?id=2689 When designing information systems, it would be good to be able to compare alternatives. However, information systems are complex phenomena as they encompass the humans involved in distributing the information. One possible way of making comparisons would be through simulation. Having constructed a prototype for such a simulation we have seen that the traditional approaches, such as Cellular Automata utilized within the social simulations field are usable but not sufficient. However, the newer agent-based approaches show more promise. We conclude that in order to make simulations of our kind possible, the new technologies, such as multi-agant systems, need be adapted and extended. One of the pieces missing is an agent-based infrastructure building on anticipatory principles for agent information behavior. Fri, 30 Aug 2024 11:09:22 +0200 Mon, 07 Oct 2024 15:49:09 +0200 http://popups.lib.uliege.be/1373-5411/index.php?id=2689