The following introduces CaDaDis, an extension to the architecture-independent VISTA toolkit. CaDaDis creates visible accounts of cognitive model behavior through a set of Categorical Data Displays. It includes a standard Pert Chart showing tasks by category (or resource), a Nonstandard Pert Chart that shows the temporal dependencies, and a Gantt chart that helps show occurrences of agent event...

M. Soehle 1*, M. Kuech 1, M. Grube 1, S. Wirz 1,2, S. Kreuer 3, A. Hoeft 1, J. Bruhn 1,4 and R. K. Ellerkmann 1 1 Department of Anaesthesiology and Intensive Care Medicine, University of Bonn, Sigmund-Freud-Str. 25, D-53105 Bonn, Germany 2 Department of Anaesthesiology and Intensive Care Medicine, CURA Hospital, Bad Honnef, Germany 3 Department of Anaesthesiology and Intensive Care Medicine, Un...

In this paper, we apply the stochastic dynamic programming to approximate the mean project completion time in dynamic Markov PERT networks. It is assumed that the activity durations are independent random variables with exponential distributions, but some social and economical problems influence the mean of activity durations. It is also assumed that the social problems evolve in accordance wit...

Workkows management systems support the deenition and execution of business processes. While business process reeingeneering tools use time information to simulate and optimize processes, the management of time is hardly supported in workkow systems. We introduce a concept for time management for workkow systems. It consists of calculating internal deadlines for all activities within a workkow,...

We develop a bicriteria model for the resource allocation problem in PERT networks, in which the total direct costs of the project as the first objective, and the mean of project completion time as the second objective are minimized. The activity durations are assumed to be independent random variables with either exponential or Erlang distributions, in which the mean of each activity duration ...

objective(s): silver nanoparticles (ag nps) are not only specific physical and chemical properties but also are considered for their antibacterial activity and ecofriendly.materials and methods:in this study a simple, cost effective biologically method for ag+reducing to ag nps using echinops extractas a stabilizer, and reducing agent.ag nps were analyzed using uv-vis spectrometry,tem, xrd and ...

This paper deals with the problem of ,nding a minimum cost schedule for a set of dependent activities when a convex cost function is attached to the starting time of each activity. A ,rst optimality necessary and su/cient condition bearing on the head and tail blocks of a schedule is ,rst established. A second such condition that uses the spanning active equality trees of a schedule leads to de...

From a set of a partially ordered tasks, one goal of the project scheduling problem is to compute earliest starting dates, latest starting dates and floats of the different tasks, and to identify critical tasks. When durations of tasks are not precisely known, the problem is much trickier. Recently we provided polynomial algorithms to compute upper bound of activity floats in the interval-value...

Abstract Traditionally, stochastic project planning problems are modeled using the Program Evaluation and Review Technique (PERT). PERT is an attractive technique that commonly used in practice as it requires specification of only a few characteristics activities’ duration. Moreover, its computational burden extremely low. Over years, four main disadvantages have been voiced much research has d...