The research described in this paper focuses on the application of modal strain techniques on a multi-girder bridge superstructure with the objectives of identifying the presence of damage and detecting false damage diagnosis for such structures. The case study is a one-third scale model of a slab-on-girder composite bridge superstructure, comprised of a steel-free concrete deck with FRP rebars...

In this paper, we employ the view model given by Bertino to propose a new design approach for a secure multi-level object-oriented database system. The central idea is to provide the user with a multi-level view derived from a single-level secure object-oriented database. Hence the database operations performed on the multi-level views are decomposed into a set of operations on the single-level...

In this paper, a supply chain network design problem is explained which contains environmental concerns in arcs and nodes of network. It is assumed that there are some routes such as road, rail and etc. in each pair of nodes. In this model decision variables are choosing facilities to open, environmental investment level in each facility and flow of products between nodes in each route. A multi...

Objective: The present research aimed to examine positive and negative beliefs about worry and tendency of students to drug abuse in terms of cross-level effect of school-bounding. Methods: In this multi-level investigation, 1000 students of high schools were selected by means of multi-stage sampling technique. Then, they completed metacognitive questionnaire (MCQ), school-bound...

The design of closed-loop logistics (forward and reverse logistics) has attracted growing attention with the stringent pressures of customer expectations, environmental concerns and economic factors. This paper considers a multi-product, multi-period and multi-objective closed-loop logistics network model with regard to facility expansion as a facility location–allocation problem, which more cl...

Multi-level meta-modeling hinges on the precise conceptualization of the instantiation relation between elements of the meta-model and the model. In this paper, we propose a new algebraic instantiation approach, the Dynamic Multi-Layer Algebra. The approach aims to provide a solid algebraic foundation for multi-level meta-modeling, which is easily customizable through different bootstrap elemen...

A hierarchical Bayesian learning framework is proposed to account for multi-level modeling in structural dynamics. In the system considered as a hierarchy of lower-level models, starting at lowest material level, progressing component then subsystem before ending up level. and uncertainty quantification techniques based on measurements that rely data collected only level cover quite limited num...