Today, the construction industry is facing intense competition and success in this competition depends on several factors. Project managers try to minimize project time and cost, carbon dioxide emission and at the same time maximizing the quality of project and its plan robustness. In this paper, study construction project scheduling considering a discrete trade-off between time, cost, quality,...

We consider a cache operating under a demand-driven replacement policy when document requests are modeled according to the Independent Reference Model (IRM). We characterize the popularity pmf of the stream of misses from the cache, the so-called output of the cache, for a large class of cache replacement policies, including standard on-demand replacement algorithms such as the policy A0 and th...

Background: In 2011 the Progress in International Reading Literacy Study (PIRLS) and the Trends in International Mathematics and Science Study (TIMSS) were conducted at fourth grade in a number of participating countries with a shared representative sample. In this article we investigate whether there are multidimensional proficiency patterns across the competency domains or not. Methods: In or...

Temporal networks come with a wide variety of heterogeneities, from burstiness of event sequences to correlations between timings of node and link activations. In this paper, we set to explore the latter by using greedy walks as probes of temporal network structure. Given a temporal network (a sequence of contacts), greedy walks proceed from node to node by always following the first available ...

In the area of Data Warehousing the importance of conceptual modelling increases as it gains the status of a critical success factor. Nevertheless the application of conceptual modelling in practice often remains undone, due to time and cost restrictions. Reference models seem to be a suitable solution for this problem as they provide generic models which can be easily adapted to specific probl...

In this paper, we propose a participative method to design a security risk reference model, composed of a domain model and a security risk model. We relate the application of the method to our attempt for a design of a national reference model of the medical laboratories in Luxembourg, for which we ran five participative workshops with domain experts to gather their knowledge. We validated the ...

Reference models usually serve as starting points for developing company specific models. Unfortunately, successful usage of reference models is often impeded by various aspects, such as a lack of acceptance among employees, incorrect model implementation, or high project costs all of which more often than not are resulting from an imbalance between the model's complexity and the complexity of ...