performance of chamomile (matricaria chamomilla l.) was evaluated on twelve transplanting dates that were arranged at 30 days interval; during 2013-2014 on experimental field of wondo genet agricultural research center; using rcbd design with three replications. transplanting time exerted a very highly significant (p<0.0001) influence on plant height, flower yield and essential oil yield; essen...

At airports with closely-spaced parallel runways, the inability to conduct simultaneous approaches in all weather conditions is a cause of significant delay. One concept for reducing delay is paired approaches, where two airc raft on closely spaced approaches are ‘paired’, and the ‘trail’ aircraft stays within a safe zone relative to the ‘lead’. This positioning guarantees that neither aircraft...

weather circulation patterns play a main role in the occurrence of environmental phenomena especially in middle latitude. occurrence of dry and wet spells is in relation to synoptical system repetitions and types of weather. in this research first by using of standard precipitation index (spi), extensive droughts in the province were identified. then by using principal component analysis (pca) ...

The principle “bottlenecks” of the air traffic control system are the major commercial airports [1]. Atlanta, Detroit, St. Louis, Minneapolis, Newark, Philadelphia, and LaGuardia all expect to be at least 98% capacity by 2012 [2]. Due to their cost and the environmental and noise issues associated with construction, it is unlikely that any new airports will be built in the near future. Therefor...

A fundamental function of any aviation weather system is to provide accurate and timely weather information tailored to the specific air traffic situations for which a system is designed. Weather location and intensity are of prime importance to such systems. Knowledge of the weather provides “nowcasting” functionality in the terminal and en route air spaces. It also is used as input into aviat...

Purpose This paper aims to establish the most underlying factors causing construction projects delay from applicable. Design/methodology/approach The conducted survey of experts using systematic review vast body literature which revealed 23 common affecting delay. Consequently, this study carried out reliability analysis, ranking significance index measurement parameters (SIDP), correlation ana...