Before introducing a recording system for meat quality traits, the returns of this recording and the costs involved to obtain various measurements have to be compared. Some traits might be of high economic value, but on the other hand recording of these traits is also very costly. Recording of traits with low economical importance might be beneficial because of the low costs involved in obtaini...

nowadays, the machinery dependent life makes the people take refuge in natural recreational places. therefore, evaluating the recreational value of natural promenades has great importance to lead to more protection. in this research, economic valuation of sorkheh hesar national park, and protected area of geno were computed, and socio-economic factors compared in each area. geno protected area ...

Passenger and freight traffic on our roads continues to increase in number severity. High axle loads, high tyre pressures greater dynamic loads require load-bearing stable road pavements. Concrete pavements are highly suitable for meeting these demands over long periods of time. Therefore, they well suited the new construction renewal motorways, federal country roads, local bypasses, bus areas,...

magnetic levitation (maglev) is amongst the most advanced technologies that are available to the transportation industries. it has already been noticed by decision makers in many countries around the globe. contrary to such high levels of interest, there are no practical algorithms available to the engineers and/or managers to assist them in analyzing economics of the maglev systems. therefore,...