Ray tracing is a powerful technique to generate realistic images of 3D scenes. However, the rendering of complex scenes may easily exceed the processing and memory capabilities of a single workstation. Distributed processing offers a solution if the algorithm can be parallelised in an efficient way. In this paper a hybrid scheduling approach is presented that combines demand driven and data par...

The Leontief model is generally considered as belonging to the category of the production-prices models , aside of the Ricardian, Marxian and Sra aian models. This paper clearly demonstrates that this is a super cial point of view. As the Leontief model handles price indexes, it is over two periods: the Leontief price indexes solve the model for the base time period. The production-prices model...

We show that the problem of finding an ǫ-approximate Nash equilibrium of an n× n two-person games can be reduced to the computation of an (ǫ/n)-approximate market equilibrium of a Leontief economy. Together with a recent result of Chen, Deng and Teng, this polynomial reduction implies that the Leontief market exchange problem does not have a fully polynomial-time approximation scheme, that is, ...

Lehoux et al provide a timely and relevant turn on the broad and ongoing discussion around the introduction of health technology and innovation. More specifically, the authors suggest a demand-driven approach to health innovation that starts from identifying challenges and demands at the health system level. In this commentary, I review a number of underlying implications of their study in rela...

Agricultural Extension services are among the most important rural services in developing countries. The services are considered to be a key driver of technological change and productivity growth in agriculture. In Kenya, like in the rest of the developing economies, agricultural extension has largely been delivered through supply–driven approaches. Due to perceived low impact of agricultural e...

in the present study, an application of multilevel modeling approach to the input- output analysis are presented first, the regional input-output table of all provinces in iran was extracted based on the adjusted flegg location quotient method (aflq). second differentiation in the leontief technical coefficients and the backward and forward linkages among various activities and sectors of all p...

Ray tracing is a powerful technique to generate realistic images of 3D scenes. However, the rendering of complex scenes under advanced lighting circumstances may easily exceed the processing and memory capabilities of a single workstation. Distributed processing offers a solution if the algorithm can be parallelised in an efficient way. In this paper a hybrid scheduling approach is presented th...

In this thesis I present a demand-driven pointer analysis for Java that aims at applications which require memory and time efficiency of the pointer analysis, such as tools for IDEs or JIT compilers. It furthermore allows clients to specify the precision needed and is context-sensitive and flow-sensitive. The demand-driven aspect of my approach allows the analysis to ignore irrelevant parts of ...