Hubs, or central trans-shipment facilities, allow the construction of a network where large numbers of direct connections can be replaced with fewer, indirect connections. Hub-andspoke configurations reduce and simplify network construction costs, centralize commodity handling and sorting, and allow carriers to take advantage of scale economies through consolidation of flows. Such networks have...

In this paper, performance analysis of Shared and Switched Ethernet LANs under Different Scenarios through simulation has been attempted using OPNET as simulating tool. The first scenario was comes under Hub Only scenario. The environment of the network is in an office, which covers an area of 100m X 100m. The hub used is a 16 port hub in an Ethernet environment with the following configuration...

Resective neurosurgery carries the risk of postoperative cognitive deterioration. The concept of 'hub (over)load', caused by (over)use of the most important brain regions, has been theoretically postulated in relation to symptomatology and neurological disease course, but lacks experimental confirmation. We investigated functional hub load and postsurgical cognitive deterioration in patients un...

The design of hub-and-spoke transport networks is a strategic planning problem, as the choice of hub locations has to remain unchanged for long time periods. However, strikes, disasters or traffic breakdown can lead to the unavailability of a hub for a short period of time. Therefore it is important to consider such events already in the planning phase, so that a proper reaction is possible; on...

The Front Cover picture shows the growth of strategic polyolefin catalyst research since 1990 in Interdisciplinary Research Center for Refining & Advanced Chemicals (IRCRAC) at Institute King Fahd University Petroleum Minerals, Dhahran, Saudi Arabia. Our vision is to transform Arabia into an international hub and leader education, research, training, manufacturing, application, business. See Pe...

Hubs are facilities which are used to switch and transfer commodities between terminals (supplies and demands) in many-to-many distribution systems. The p-hub center allocation problem is concerned with allocating demand and supply nodes to hubs in order to route the traffic between origindestination pairs in minimum time. The capacities of the hubs are given. Most of the researches have discus...

Article history: Received 28 June 2011 Received in revised form 5 June 2012 Accepted 3 July 2012 Available online 16 August 2012

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...

In this paper, a valuation method for multi-energy generation plants is presented. The operational flexibility of such plants is modeled using the Energy Hub concept a modeling approach that has been developed in the ”Vision of Future Energy Networks”project at ETH Zurich. The economic value of an Energy Hub including its flexibility is calculated by means of a Monte Carlo simulation method tha...

Technologies such as TiVo and Media Center have introduced the concept of Digital Video Recorder (DVR) in millions of homes. Consumers are now able to pause live-TV programs and watch them at their own convenience without the need of obsolete VCRs. These devices and their future evolution can be grouped into the class of Home Entertainment Centers (HECs). Specifically, a HEC can be defined as a...