conclusions perceived social support is the most important factor that influences health-promoting behaviors. increasing social support by enhancing self-efficacy and decreasing perceived barriers can improve health-promoting behaviors among veterans. background health-promoting behaviors can enhance physical and mental health among individuals with disability, particularly veterans. objectives...

the problem of finding the minimum cost multi-commodity flow in an undirected and completenetwork is studied when the link costs are piecewise linear and convex. the arc-path model and overflowmodel are presented to formulate the problem. the results suggest that the new overflow model outperformsthe classical arc-path model for this problem. the classical revised simplex, frank and wolf and a ...

Hubs are critical elements of transportation networks. Location of hubs and allocation of demands to them are of high importance in the network design. The most important purpose of these models is to minimize the cost, but path reliability is also another important factor which can influence the location of hubs. In this paper, we propose a P-center hub location model with full interconnection...

project planning is part of project management, which is relates to the use of schedules such as gantt charts to plan and subsequently report progress within the project environment. initially, the project scope is defined and the appropriate methods for completing the project are determined. in this paper a new approach for the critical path analyzing a project network with random fuzzy activi...

one of the most important factors that affects on job producitivity refers to personnel. motivation and job satisfaction (j.s) explain the reason and cause of human behavior in organization. then the study of this topic will be very important. in this paper causal model of efficient factors of job satisfaction developed by path analysis model. in this paper path analysis model have explained di...

we review various ways to express the partition function of the single-band hubard model as a path integral. the emphasis is made on the derivation of the action in the integrand of the path integral and the results obtained from this approach are discussed only briefly.   since the single-band hubbard model is a pure fermionic model on the lattice and its hamiltonian is a polynomial in creatio...