Multidisk vertical allocation (MDVA) problems intend to find an allocation of relations to disks such that the expected query cost is minimized. Recently, Chang [European Journal of Operational Research 143 (2002) 210] modified Rotem et al.’s [IEEE Transactions on Knowledge and Data Engineering 5 (1993) 882] method for solving an MDVA problem using a smaller number of binary variables. Chang’s ...

In this paper, multi-agent simulation is applied to explore how people organize themselves when they have to perform a task. The multi-agent model that we used is based on the formalization of psychological and organizational theories. Three experiments are presented in which multi-agent simulation is being used to study processes of self-organization. This article is structured as follows. Fir...

This study examined the association of two widely used measures of attention allocation toward or away from threat-related stimuli: The emotional Stroop task and the attentional probe task. Fifty-three participants responded to computer versions of both tasks where stimuli were presented both subliminally and supraliminally. Thus, four indexes indicating attention allocation were computed for e...

As a first step towards understanding the evolution of small groups in firms, this paper develops and tests a simple decision-theoretic model of research-unit evolution in which, as managers resolve their uncertainty over time, they shut down under-performing units and remove under-performing unit heads. The selection process generates several testable hypotheses about how unit and head charact...

Cloud computing allows dynamic resource scaling for enterprise online transaction systems, one of the key characteristics that differentiates the cloud from the traditional computing paradigm. However, initializing a new virtual instance in a cloud is not instantaneous; cloud hosting platforms introduce several minutes delay in the hardware resource allocation. In this paper, we develop predict...

Professional norms are supposed to have a central role in the allocation of resources when consumers have inferior information about the characteristics of products. We argue that economic motives are nevertheless important to resource allocation when professional opinions differ. The argument is illustrated with an example from medical care. We find that physicians who experience a shortage of...

Dynamic spectrum sharing is a promising technology to improve spectrum utilization in the future wireless networks. The flexible spectrum management provides new opportunities for licensed primary user and unlicensed secondary users to reallocate the spectrum resource efficiently. In this paper, we present an oligopoly pricing framework for dynamic spectrum allocation in which the primary users...

Markets are now fashionable as institutions for managing water both nationally and internationally. True markets, however, have always been rare for water rights and there are good reasons for believing that they always will be. Water is an ambient resource where the actions of any one user necessarily affect many other users. If true markets are relied on to allocate water for particular uses ...

This paper analyses efficient contracts for digital content, focusing on the music industry. It contributes to the quest for an efficient intellectual property rights environment for information goods. Moreover, it adds an interesting application to the field of behavioural economics. The model is set in a contract theory framework with the copyright holder being the principal and a consumer th...

This paper presents a fuzzy based buffer management scheme that performs buffer allocation and packet dropping for wireless multimedia networks in the context of future generation cellular networks. In this scheme, buffers are allocated to requesting application by using buffer allocation factor and packets are dropped for an application by using dropping factor. A buffer allocation factor for ...