A simple temporal network (STN) can often be used to represent the flexibility in the execution of a plan. Nodes represent the execution times of actions and directed edges represent constraints between them. An STN with resources (STNR) is an STN in which each node is associated with production or consumption levels of resources. The upper (lower) resource envelope of an STNR is the maximum (m...

Introduction Developing countries which suffer from several technical and technological weaknesses and of under-developed socio-economic systems, also face energy shortages and inefficient energy systems. This situation gets worse if we take into account the high population growth rate in these countries. Such an enormous increase in population leads to a scramble for limited energy resources a...

The paper analyses a model where the fight for the appropriation of rents from natural resources between two groups leads to multiple equilibria. The possibility to be trapped into the low-income equilibrium, characterized by strong social conflict (civil war) and stagnation of income, increases with the weakness of political institutions, the population growth rate, the amount of rents from na...

Many employees experience work–family conflict (WFC) and family–work (FWC), multidimensional states of resource depletion. In this paper, we conceptualize Type A B personality as depletion gain scenarios that have implications for perceptions WFC FWC. We draw on conservation resources (COR) theory to examine the loss resulting respectively from resource-generating role ability-based emotional i...

ABSTRACT: Recent theoretical work on stream depletion and water level responses to pumping a well near a stream include the (semi-) analytical solutions by Hunt (1999), Zlotnik and Huang (1999), and Butler et al. (2001). Yet, few field studies assessed the limiting assumptions and physical concepts inherent in the theoretical models. A long-term study of stream depletion under typical condition...

Non-timber forest products (NTFPs) consist of goods biological origin other than wood, derived from forests, wooded land and trees outside forests. The importance NTFPs for sustaining rural livelihoods, fostering poverty alleviation, enhancing biodiversity conservation, facilitating economic growth is well known in Nepal. In spite these facts, have not received the sustained systematic support....

The current energy scenario should be examined from a global perspective and include models for optimizing the development of major renewable sources. complex structural elements such in terms structure consumption economic environmental benefits, as well minimize costs negative consequences. At crisis stage, access to sources is an important asset progress world all states. depletion natural r...

Precise measurement of insecticide toxicity against house flies from various poultry ranches, dairies and cattle feed lots provided evidence of the presence of resistance roughly in proportion to the extent of insecticide use in each situation. The data indicate where changes to new insecticides are advisable, and illustrate how heavy reliance on insecticides over several years for fly control ...

• In masting trees, synchronized, heavy reproductive events are thought to deplete stored resources and to impose a replenishment period before subsequent masting. However, direct evidence of resource depletion in wild, masting trees is very rare. Here, we examined the timing and magnitude (local vs individual-level) of stored nutrient depletion after a heavy mast event in Pinus albicaulis. • I...