in order to study the qualitative, quantitative characteristics of a pure common populus alba stand in polkalleh & a mixed stand of populus alba & populus nigra in karchegan, two 30-year-old stands were selected with a plantation interval ( spacing) of 2.5 × 1.5 m in each of which 30 pcs of 2 are samples were randomly selected. in each sample pc all the trees diameters were measured using a dia...

this study was undertaken to identify key elements for obtaining community interest and motivate them to support eliminate malaria in the places that malaria is no longer a perceived threat.sequential explanatory mixed methods research design used to provide more comprehensive evidence research. a questionnaire was developed after reviewing the literature relating to community participation for...

in order to examine the impact of pure and mixed planting on the production of grasses and also the biological control of weeds an experiment was conducted in the research farm of alashtar city of lorestan province between the years 1391 and 1392. this experiment within the design of complete random blocks (rcbd) with 6 protections which included 100:0 (rouph pea pure planting) 0:100 (pure plan...

topography and climate are two important soil forming factors affecting genesis and clay mineralogy of soils. calcareous and gypsiferous soils are widely spread in arid and semiarid parts of iran and palygorskite is a dominant clay mineral in these soils. the objectives of the study were to: (1) determine soil genesis and classification along the climotoposequence and (2) investigate clay miner...

To offset sedentary lifestyles, physical activity is widely promoted in the workplace. In this paper, we present HealthQuest, a mixed reality system to motivate employees’ physical activity. HealthQuest leverages a company facility’s existing physical infrastructure augmented with distributed kiosks. Users engage in wellness learning quests by walking from kiosk to kiosk in the environment. The...

We show that deciding if a mixed graph has a well-balanced orientation is NP -complete.

The paper deals with the competitive effects of price guarantees in a spatial duopoly where consumers can search for lower prices but have to incur hassle costs if they want to claim a price guarantee. It is shown that symmetric equilibria with and without price guarantees exist but price guarantees will have no effect on prices if search costs are low, hassle costs are high and the number of u...