Forest operations can lead to increased runoff and soil loss on roads skid trails. The aim of this study was evaluate the effectiveness two erosion control treatments applied different segments trails following six natural rainfall events. A total 162 plots 10 m long by 4 wide were established in a Hyrcanian deciduous forest assess ground-based harvesting traffic. experimental setup consisted t...

the successful management in construction costing of wood dry kilns is an advantageous approach which brings us not only the assurance in service profitability but also gives rise customer’s satisfaction. the construction costing of two types of wood dry kilns, namely, prefabricated aluminum-and masonry kilns with normal operation temperature was studied. for this purpose, the construction, dep...

When the driving road surface condition suddenly changes from dry to wet, the driving wheels will slip due to much lower coefficient of friction, and thus cause the vehicle to skid. Unlike the popular anti-brake system which applies differential braking to wheels, the presented ant-skid Control properly distributes torques to wheels without braking. In comparison with many recently developed an...

Forest management aimed at the sustainable use of forest resources is an alternative land to deforestation and can improve conservation in tropical regions. The construction infrastructure, including roads, skid trails, log-landings, a key factor minimizing impacts disturbances typically caused by selective logging activities forests. In this study, we used field secondary data assess planned i...

Abstract This study aimed to estimate both direct medical and indirect costs of treating the Coronavirus disease 2019 (COVID-19) from a societal perspective in patients at referral hospital Fars province as well economic burden COVID-19 Iran 2020. Methods is partial evaluation cross-sectional cost-description conducted based on data referred university between March July The were collected by e...

BACKGROUND Helicobacter pylori may cause many gastrointestinal problems in developing countries such as Iran. We aimed to analyze the cost- effectiveness and cost- utility of the test-and-treat and empirical treatment strategies in managing Helicobacter pylori infection. METHODS This was a Markov based economic evaluation. Effectiveness was defined as the symptoms free numbers and QALYs in 10...