In this paper, static performance of square concrete-filled double-skin steel tube (CFDST) chord to hollow section (SHS) brace T-joints are investigated through experimental and numerical studies. Twelve specimens, including 8 with CFDST chord, 2 (CFST) SHS as counterparts, were tested under continuously increasing compressive force on the concentric compression load applied simultaneously chor...

The vortex tube is a structurally simple device with no moving parts that is capable of separating a highpressure flow into two lower pressure flows with different energies, usually manifested as a difference in temperatures. The vortex tube is relatively inefficient as a stand-alone cooling device but it may become an important component of a refrigeration system when employed as an alternativ...

The pressure drop of refrigerant R-134a flow boiling inside a horizontal tube has been investigated experimentally. The test set-up which was used in this investigation is a well instrumented vapor compression refrigeration system. These instruments are thermocouples, flow meter, pressure gauges and the pressure drop measuring apparatus. This system consisted of three electrically heated evapor...

To investigate the mechanisms underlying the efficacy of surgical treatment for painful diabetic peripheral neuropathy. Rats were initially divided into 3 groups (I, control rats, II, streptozotocin-induced diabetic rats, III, streptozotocin-induced diabetic rats with latex tube encircling the sciatic nerve without compression). When mechanical allodynia (MA) became stable in the third week, on...

Hybrid structures have the advantage of combining different types materials at same time. The trend lightweight design in transportation industry has promoted development and application composite with good crashworthiness performance. Low-density crushable foam-filled metal-composite hybrid potential advantages as energy-absorbing components. This study investigated mechanical characteristics ...

the effect of expiratory rib – cage compression before endotracheal suctioning on blood pressure in patients under mechanical ventilation    shrvani y [1] *, piami bosary m [2] , agha hasan kashani s3, mosavi nasab n4, ghafouri fard m5     received: 21 apr , 2013 accepted: 12 jul , 2013   abstract   background & aims : in patients undergoing mechanical ventilation because of an endotracheal tub...