we conducted this study to determine the risk of transmission of q fever to health care workers (hcws) during perioperative exposure to coxiella burnetii -infected thoracic endovascular aneurysm stent graft. pre-operative and 6-week post-operative phase i and ii igg q fever antibody titers were determined in 14 staff members of an operation room. the room had a negative pressure and all the mem...

The container crane is a key machine in ports. Over the past 15 years, modeling and control of quay cranes for automating ports has been the main research issue. In this paper, crane models and control methodologies appeared in the literature are reviewed. A generalized formulation of the most widely used crane model is introduced. Various control techniques are briefly discussed. In conclusion...

Abstract Silage equipment can crush crops into small materials, which be used as feed for livestock farms to achieve efficient and reasonable utilization of resources. In this paper, based on the completion overall scheme design a modular backpack silage equipment, integration crop crushing, bundling coating is realized. At same time, control system suitable programmable logic controller (PLC) ...