Several approaches have been developed to measure instantaneous friction between the piston assembly and cylinder in internal combustion (IC) engines, such as floating-liner, reciprocating liner, mean effective pressure (IMEP), fixed sleeve, (P-?) method tribological bench tests. However, “floating-liner method” “(IMEP) are most common methods used IC engines. This paper critically evaluates di...

In this article, we present a 48-year-old female case who had an unsuccessful previous forte ceramic-on-ceramic total hip arthroplasty for early coxarthrosis secondary to acetabular dysplasia. She had fracture and protrusion of the ceramic liner through the titanium acetabular shell without any apparent trauma, possibly resulting from the mistake during the implantation of the ceramic liner int...

A finite element model has been developed to predict in vivo micro motion between a modular acetabular cup and liner after cement less total hip arthroplasty. The purpose of this study is to experimentally validate the model. Six LVDT sensors were used to monitor the micromotion of the liner when subjected to loading conditions ranging from 250 N to 5000 N. Deformations at points of interest fo...

Ceramic fractures have been reported to occur in hip replacements, but the techniques used to extract a well fixed but fractured component are not commonly described. We present a case of ceramic liner fracture and validate a modification of a previously reported extraction technique that allowed us to save the acetabular cup and insert a polyethylene liner. With an increasing trend in ceramic ...

We study the optimal design problem of acoustic liner to minimize fan noise radiation from commercial aircraft engine nacelles. Specifically we treat the liner impedance factor as a parameter and seek to estimate its optimal value that minimizes far-field radiated noise. The existence of such an optimal parameter is proved under the assumption that the Helmholtz equation governs the noise field...

In this case report our main goal was to preserve the patient’s remaining teeth and providing a prosthesis during healing period which will serve for both mastication healing. Mandibular anterior were lost due osteomyelitis, leaving unhealed necrotic area. Curettage done salvage perfused bone. Use of removable with on occlusal surface silicone soft liner intaglio surface, served purpose prevent...

Aim: To evaluate the properties of three different long-term addition polymerising silicone denture liners in relevant clinical situations. Materials and Methods: Three silicone-based, widely used soft (autopolymersing chair-side GC RelineTM Soft Mollosil® heat cure Molloplast® B) were selected. Forty-two disk-shaped samples prepared using a heat-polymerised PMMA base material stainless steel s...