An interactive puzzle-solving program was implemented in two versions both permitting two players to cooperate in solving the puzzle. In one version, the users were permitted not only to individually pick up and place pieces into the puzzle but also to jointly pick up and position pieces with synchronous cooperative control of the piece. In the other version, the synchronous cooperative control...

Cooperative spectrum sensing was proposed to combat fading, noise uncertainty, shadowing, and even hidden node problem due to primary users (PUs) activity that is not spatially localized. It improves the probability of detection by collaborating to detect PUs signal in cognitive radio (CR) system as well. This paper studies cooperative spectrum sensing and signal detection in CR system by imple...

one of the main problems in the quality control of rivers is the high control cost imposed upon pollutant units. the cooperative policy approach in the treatment process between two or more pollutant units is a new and economic perspective in the environmental management of catchment basins. origins of large amounts pollutants which require a high cost to control pollution are trying to start p...

For visualization of multivariable data, multivariate cube meets with the limitation of screen and human vision. Retinal variables are integrated into multivariate cube to enhance its visual characteristics. The selective feature of variables and associative feature of the values of the same variable are improved with the integration of retinal variable into the set of visual variables. The sel...

This paper deals with system support for the design of CSCW environments. Our model introduces objects spaces shared by cooperating participants and cooperation spaces which group participants involved in a particular cooperation together. Objects spaces are only accessed via cooperation spaces. This makes our model strongly cooperation oriented. The Group notion structures our system, called O...

In this article, we propose a semi-distributed resource allocation framework for the resource optimization in multicell uplink cooperative orthogonal frequency division multiplexing systems. Specifically, we model the resource allocation framework as an optimal problem. This optimization problem is divided into two steps. First, using integer programming, we achieve the joint relay selection an...

In this work, we investigate two groundwater inventory management schemes with multiple users in a dynamic game-theoretic structure: (i) under the centralized management scheme, users are allowed to pump water from a common aquifer with the supervision of a social planner, and (ii) under the decentralized management scheme, each user is allowed to pump water from a common aquifer making usage d...

The term prototyping has in recent years become a buzzword in both research and practice of system design due to a number of claimed advantages of prototyping techniques over traditional specification techniques. In particular it is often stated that prototyping facilitates the users' involvement in the development process. But prototyping does not automatically imply active user involvement! T...

1 The introduction of farmed trout (stocking) to support anglers’ catches is a well-established and widespread practice. Many fisheries rely upon it to remain viable for example reservoir trout fisheries that lack natural trout production. However, in waters with a natural population of trout, stocking of farmed fish can present risks to the wild population through inter-breeding and competition.