multi-path is favorite alternative for sensor networks, as it provides an easy mechanism to distributetraffic, as well as considerate fault tolerance. in this paper, a new clustering based multi path routingprotocol namely ecrr (energy efficient cluster based routing algorithm for improving reliability) isproposed, which is a new routing algorithm and guarantees the achievement to required qos ...

We present our ongoing design of Snakey, a tangible user interface (TUI) dedicated to the field of reservoir geosciences and engineering. Our design of Snakey emphasizes intuitive manipulation and interaction with 3D curves, common to underground well path exploration and planning. Snakey is not designed to replace the traditional CAD reservoir well path planning tools, but rather to augment th...

This paper summarises the work of a 5-year research programme into the heat transfer within cavities adjacent to the main annulus of a gas turbine. The work has been a collaboration between several gas turbine manufacturers, also involving a number of universities working together. The principal objective of the study has been to develop and validate computer modelling methods of the cooling fl...

Cost reduction is a driving force in the development of brownfield wells.1 It is well known that better planning leads to better execution in the drilling phase with less nonproductive time and reduced costs. This paper describes enhanced well planning workflows in light of recent software technological innovations. The technology, which enables this solution for the first time in the industry,...

Graphs have been commonly used to model many applications. A natural problem which abstracts applications such as itinerary planning, playlist recommendation, and flow analysis in information networks is that of finding the heaviest path(s) in a graph. More precisely, we can model these applications as a graph with non-negative edge weights, along with a monotone function such as sum, which agg...

The thesis addresses optimal control problems where the dynamics is given by differential equations with memory. For these optimization problems, optimality conditions are provided; second order conditions constitute an important part of the results of the thesis. In the case – without memory – of ordinary differential equations, standard optimality conditions are strengthened by involving only...

The Complexity of Economic Policy: I. Restricted Local Optima in Tax Policy Design Economists traditionally tackle normative problems by computing optimal policy, i.e. the one that maximizes a social welfare function. In practice, however, a succession of marginal changes to a limited number of policy instruments are implemented, until no further improvement is feasible. I call such an outcome ...

AS EARLY AS 1868, Pflüger (8) recognized that hypoxia stimulated ventilation, which spurred a search for the location of oxygen-sensitive receptors both within the brain and at various sites in the peripheral circulation. When Corneille Heymans and his colleagues (4) observed that ventilation increased when the oxygen content of the blood flowing through the bifurcation of the common carotid ar...

In 1998, when Dr Martin Seligman was president of the American Psychological Association, he proposed a new approach to psychology. The thinking at that time led to a disease-based model in which the focus was on treating mental illness. Dr Seligman advocated, however, that the science should be expanded to include factors that contribute to optimal functioning and greater well-being. He, along...