http://popups.lib.uliege.be/1373-5411/index.php?id=103 Full text issues fr Mon, 13 May 2024 17:02:23 +0200 Thu, 26 Sep 2024 16:58:24 +0200 http://popups.lib.uliege.be/1373-5411/index.php?id=103 0 http://popups.lib.uliege.be/1373-5411/index.php?id=4442 Attractive quality is an emergent and increasingly important property of all the technical products, devices, and services we are using in our daily lives. Timely and relevant technical information disseminated through an effective technical communication system is a crucial important component in building such quality. Parallel to that development, so called social media have lately become an integrated part of many peoples' e-lives. A relatively new phenomenon is that social media are also applied for technical communication. It is concluded that business firms that are successful in mastering social media for technical communication may gain considerable competitive advantages. An anticipatory approach will help in reaching that goal. Fri, 11 Oct 2024 10:43:36 +0200 http://popups.lib.uliege.be/1373-5411/index.php?id=4442 http://popups.lib.uliege.be/1373-5411/index.php?id=4455 Verhulst logistic curve either grows OR decays, depending on the growth rate param eter sign. A similar situation is found in the Gompertz law about human mortality. It is aimed to encompass into ONE simple differential equation the growth AND decay features of, e.g., population sizes, or numbers. Previous generalizations of Verhulst or Gompertz functions are recalled. It is shown that drastic growth or decay jumps or turnovers can be readily described through drastic changes in values of the growth or decay rate. However smoother descriptions can be found if the growth or decay rate is modified in order to take into account some time or size dependence. Similar arguments can be carried through, but not so easily, for the so called carrying capacity, indeed leading to more elaborate algebraic work. Fri, 11 Oct 2024 11:04:19 +0200 http://popups.lib.uliege.be/1373-5411/index.php?id=4455 http://popups.lib.uliege.be/1373-5411/index.php?id=4459 In this paper we present an innovative concept and prototype of a web platform which supports participatory modelling in the decision-making processes in the field of environmental modelling and simulation. Participatory modelling needs usually face-to-face participatory modelling sessions. In comparison to classical approaches, the platform presented in this paper shall facilitate web-based collaborative and cumulative modelling when such face-to-face sessions cannot be organised as often as desired. Successive iteration steps of the model development can thus be displayed interactively in a standard web browser together with comments and explanations made by the modeller. The platform strengthens the support of formal model construction and documentation on the one hand and reduces the effort of model re-publishing on the other hand. These approaches are discussed and characterised in the following contribution. Furthermore this platform shall be used to support participatory modelling and decision-making processes in the field of sustainable development, especially in the context of anticipatory systems Fri, 11 Oct 2024 11:14:16 +0200 http://popups.lib.uliege.be/1373-5411/index.php?id=4459 http://popups.lib.uliege.be/1373-5411/index.php?id=4464 Present paper addresses an approach to determine optimal recruitment and transi tion strategies in strict hierarchical manpower system by the application of simula tion modeling and optimization methods. The transition model is represented in the form of discrete state space. The target values for each particular rank are deter mined by the user defined trajectory function. Optimal recruitment and transition dynamics is determined by the minimization of the differences between desired and actual state values. Analytical approach to the optimization is considered in order to provide proper control strategy. Fri, 11 Oct 2024 11:26:13 +0200 http://popups.lib.uliege.be/1373-5411/index.php?id=4464 http://popups.lib.uliege.be/1373-5411/index.php?id=4469 The general questions of sustainable development: the conception, examples and limitations of implementation are considered. General principles for formalization of notion of sustainable development are discussed that may provide the possibility of introduction of strict definitions of sustainable development. General problem of sustainable development is considered from the point of views of weak and strong anticipatory systems. Some models are considered for study of sustainable development. Relation stability\transformation had been investigated. The consideration of mental aspects comes into question at introduction of sustainable development as one of main problems of transformations. Fri, 11 Oct 2024 11:34:32 +0200 http://popups.lib.uliege.be/1373-5411/index.php?id=4469 http://popups.lib.uliege.be/1373-5411/index.php?id=4478 This paper presents a system dynamics model which shows that there seem to be rational reasons for hesitation to invest in resource-saving projects. In contrast to classical marketing approaches dealing with decreasing resource and product prices a new kind of follower advantages in a market of increasing resource prices may constitute a waiting game which in turn can significantly delay the deployment of sustainable technologies. This new kind of follower advantages and the related hesitation to introduce a potential resource-saving new technology may be significant when anticipating the market diffusion of such a technology or designing policy to foster green economy. A price shock of resources, as shown by model simulations, might be a possible way to switch back from such a waiting game to a preemption game. Fri, 11 Oct 2024 12:03:11 +0200 http://popups.lib.uliege.be/1373-5411/index.php?id=4478 http://popups.lib.uliege.be/1373-5411/index.php?id=4612 The paper addresses an important part of enterprise activity, which is the warranty claims control and prediction. Warranty claims have a significant impact on the financial aspect of the company, because of the funds that need to be reserved for repair of the defected products within the warranty period. The failure process is considered as a combination of market absorption and failure process. Prediction and determination of terminal call rate (TCR) is important for monitoring of the production system efficiency. Several models to predict TCR have been analyzed, such as Weibull model and the Markov Modulated Fluid model (MMFM). The models were validated against two types of data: a) from sales to failure, and b) from production to failure. The results show that MMFM model provides promising prediction results. Mon, 14 Oct 2024 15:18:38 +0200 http://popups.lib.uliege.be/1373-5411/index.php?id=4612 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 http://popups.lib.uliege.be/1373-5411/index.php?id=4622 http://popups.lib.uliege.be/1373-5411/index.php?id=4641 A class of stochastic antagonistic positional games for Markov decision processes with average and expected total discounted costs optimization criteria are formu lated and studied. Saddle point conditions in the considered class of games that extend saddle point conditions for deterministic parity games are derived. Further more algorithms for determining the optimal stationary strategies of the players are proposed and grounded Mon, 14 Oct 2024 15:41:10 +0200 http://popups.lib.uliege.be/1373-5411/index.php?id=4641 http://popups.lib.uliege.be/1373-5411/index.php?id=4653 We will present the theory of anticipatory networks and show that it generalizes earlier models of consequence anticipation in multicriteria decision problem solving. The theory bases on an assumption that the decision-maker takes into account the anticipated outcomes of future decision problems linked in a prescribed manner by the causal relations with the present one. So arises a multigraph of decision problems linked causally (first relation) and representing additionally one or more anticipation relations. Such multigraphs will be termed anticipatory networks. Then we will introduce the notion of superanticipatory systems, which are anticipatory systems that contain a future model of at least one more anticipatory system beyond itself. It will be shown that non-trivial anticipatory networks are superanticipatory systems. Finally, we will discuss some real-life applications of anticipatory networks. Mon, 14 Oct 2024 15:49:44 +0200 http://popups.lib.uliege.be/1373-5411/index.php?id=4653 http://popups.lib.uliege.be/1373-5411/index.php?id=4665 Science attempts to understand life systems. While physical systems are signified by status, life systems are evidenced by function and organ. As anticipatory systems their behaviour relies on embodied memories of their past and probable future. Complexity and semiosis act as drivers of evolution; anticipation as constituting principle of life systems. Complexity implies unfolding and re-enfolding guiding differentiation and growth. Semiosis generates intent and meaning ensuring viable simplicity. Interacting, they open potentiality and fields of probability for development. The dynamic entailment of complexity and meaning structures all life systems up to mental constructs. - An overarching concept embraces the pattems of life. It sheds light on the fundamental changes concerning life conditions in society and ecology. Mon, 14 Oct 2024 16:02:47 +0200 http://popups.lib.uliege.be/1373-5411/index.php?id=4665 http://popups.lib.uliege.be/1373-5411/index.php?id=4685 Motion capture or Mocap are terms used to describe the process of recording movement and translating that movement on to a digital model. It is used in military, entertainment, sports, and medical applications, and for validation of computer vision and robotics. In filmmaking it refers to recording actions of human actors, and using that information to animate digital character models in 2D or 3D computer animation. In motion capture sessions, movements of one or more actors are sampled many times per second, although with most techniques (recent developments from Weta use images for 2D motion capture and project into 3D), motion capture records only the movements of the actor, not his or her visual appearance. This animation data is mapped to a 3D model so that the model performs the same actions as the actor. This is comparable to the older technique of rotoscope, such as the 1978 The Lord of the Rings animated film where the visual appearance of the motion of an actor was filmed, then the film used as a guide for the frame-by-frame motion of a hand-drawn animated character. Camera movements can also be motion captured so that a virtual camera in the scene will pan, tilt, or dolly around the stage driven by a camera operator while the actor is performing, and the motion capture system can capture the camera and props as well as the actor's performance. This allows the computer-generated characters, images and sets to have the same perspective as the video images from the camera. A computer processes the data and displays the movements of the actor, providing the desired camera positions in terms of objects in the set. Retroactively obtaining camera movement data from the captured footage is known as match moving or camera tracking. Mon, 14 Oct 2024 16:25:22 +0200 http://popups.lib.uliege.be/1373-5411/index.php?id=4685 http://popups.lib.uliege.be/1373-5411/index.php?id=4689 A general heuristic methodology to specify coordination algorithms for distributed systems is presented. The methodology is summarised in six fuzzy rules. To translate these rules into effective tractable algorithms, two methods will be examined: via a local coordination and, in terms of Max Weber: an 'ideal behaviour'. 'We demonstrate that thereby principally different types of systems are obtained. Often, coordination can only be achieved by the second method and the behaviour of those systems shows phenomena that are impossible in locally coordinated systems: downward causation and strong anticipation. Mon, 14 Oct 2024 16:30:50 +0200 http://popups.lib.uliege.be/1373-5411/index.php?id=4689 http://popups.lib.uliege.be/1373-5411/index.php?id=4700 In case of classical continuum mechanics the set of basic equations consists of the equation of motion, the kinematic equation and the constitutive equations. The paper concentrates on the stability problems and the effects of discretization on material modeling. The method of investigation is analytic, the monodromy operator of the discrete system is studied. We study how discretization, stability and anticipation act on one another. As results we show cases, when the anticipatory nature of a material model leads to instability. Mon, 14 Oct 2024 16:36:14 +0200 http://popups.lib.uliege.be/1373-5411/index.php?id=4700 http://popups.lib.uliege.be/1373-5411/index.php?id=4707 In this paper we will discuss security in functional regions that are divided between two or more nations. Awareness and preparation requires some sort of warning mechanism making it possible for the people in the region to become aware and to prepare themselves for upcoming emergency situations. As both the disaster indicators and the crisis to come are both fuzzy and unknown, we will speak about Soft Early Waming Systems (SEWS). In SEWS each individual living in a region will act as a networked human anticipatory emergency sensor and actor. Our conception of such a regional security SEWS is given in the form of an idealised design called the netAgora portal. After discussing the broad lines of the netAgora design this paper will be focusing on the key role anticipatory modelling and simulation may play in a tool for developing a SEWS capacity for handling transnational complex emergencies and disasters. Mon, 14 Oct 2024 16:44:43 +0200 http://popups.lib.uliege.be/1373-5411/index.php?id=4707 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 http://popups.lib.uliege.be/1373-5411/index.php?id=4723 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 http://popups.lib.uliege.be/1373-5411/index.php?id=4733 http://popups.lib.uliege.be/1373-5411/index.php?id=4439 Fri, 11 Oct 2024 10:28:22 +0200 http://popups.lib.uliege.be/1373-5411/index.php?id=4439