With the explosive growth of internet activity, there will be an increasing reliance on intelligent software agents for electronic commerce and information retrieval. Such multi-agents systems will be comprised of self-motivated agents that interact with each other though negotiation and task delegation. Multi-agent technology models and facilitates these interactions through automated contract...

This paper examines the importance of learning-by-doing that is specific not just to individual firms, but to pairs of firms working together in a contracting relationship. Using new, detailed data from the oil and gas industry, I find that the joint productivity of an oil production company and its drilling contractor is enhanced significantly as they accumulate experience working together. Th...

background : lack of physical activity is the fourth common cause of human death. given the increased rate of sedentary life style among employees, the aim of this study was to evaluate physical activity status of governmental employees in changing stage based on the transtheoretical model (ttm) in hamadan, iran, in 2014. methods: this descriptive-analytical study was performed on 1200 governme...

In this work, we applied Chebychev spectral collocation method to analyze the unsteady two-dimensional flow of nanofluid in a porous channel through expanding or contracting walls with large injection or suction. The solutions are used to study the effects of various parameters on the flow of the nanofluid in the porous channel. From the analysis, It was established that increase in expansion r...

background: in the process of cancer treatment, mothers of children with cancer experience burden of care as a result of these conditions. early detection of burden of care has an important role in promoting health care. the aim of this study was to evaluate burden of care in mothers of children with a malignancy. materials and methods: this cross sectional study was done on 70 mothers of child...

Ad-hoc contracting allows to quickly react changes which could be neglected or noticed too late in case of constant contracting. But always deciding anew, e.g., how much and what order commercial buy private life, is cumbersome. To capture the cognitive burden ad-hoc it can avoided by contracting, our setup confronts pricing, non-revealing, with constantly revealing pricing. The experiment modi...

We consider a class of dynamic collective action problems in which either a single principal or two competing principals vie for the support of members of a group. We focus on the dynamic problem that emerges when agents negotiate and commit their support to principals sequentially. A danger for the agents in this context is that a principal may be able to succeed by exploiting competition amon...