Mobile technology has created new possibilities for location-based playful learning experiences. This article describes the MuseumScrabble mobile game, aimed at children visiting a historical museum. The game requires that the players explore the museum and link abstract concepts with physical artefacts using a mobile device. The focus of this article is on the interaction design process and th...

  Supply chain includes two or more parties linked by flow of goods, information, and funds. In a decentralized system, supply chain members make decision regardless of their decision's effects on the performance of the other members and the entire supply chain. This is the key issue in supply chain management, that the mechanism should be developed in which different objectives should be align...

This paper considers the advertising, pricing, and service decisions simultaneously to coordinate the supply chain with a manufacturer and a retailer. The amount of market demand is influenced by advertising, pricing and service decisions. In this paper, three well-known approaches to the game theory, including the Nash, the Stackelberg-retailer, and the cooperative game are exploited to study ...

A key solution concept in cooperative game theory is the core. The core of an expense sharing game contains stable allocations of the total cost to the participating players, such that each subset of players pays at most what it would pay if acting on its own. Unfortunately, some expense sharing games have an empty core, meaning that the total cost is too high to be divided in a stable manner. ...

We describe how to build a VIDEOPLACE-like vision-driven user interface using “optical-flow” measurements. The optical-flow denotes the estimated movement of an image patch between two consecutive frames from a video sequence. Similar framework is used in a number of commercial visiondriven interactive computer games but the motion of the users is detected by examining the difference between tw...

Coral reefs are valuable and fragile ecosystems which are under threat from human activities like coral mining. Many countries have built marine protected areas (MPAs) and protect their ecosystems through boat patrol. However, it remains a significant challenge to efficiently patrol the MPAs given the limited patrol resources of the protection agency and potential destructors’ strategic actions...

We study network design in which each pair of nodes can communicate via a direct link and the communication flow can be delivered through any path in the network. The cost of flow through each link is discounted if and only if the amount of flow exceeds certain threshold. This exploitation of economies of scale encourages the concentration of flows and use of relatively small number of links. A...