A New Centerless Grinding Technique without Employing a Regulating Wheel

Grinding Wheel Loading with and without Vibration Assistance

Introduction Due to its tool structure and composition, the grinding operation is considered the best machining process in the manufacture of brittle materials like ceramics. A grinding wheel distributes wear over many cutters and is capable of replenishing itself. However, the condition of the grinding wheel constantly changes as grits wear and chips accumulate in the spaces between grits. The...

Fabrication of Microscale Tungsten Carbide Workpiece by New Centerless Grinding Method

The automorphism tower of a centerless group without Choice

The Automorphism Tower of a Centerless Group (mostly) without Choice

For a centerless group G, we can define its automorphism tower. We define G: G = G, G = Aut (G) and for limit ordinals G = ⋃ α<δ G. Let τG be the ordinal when the sequence stabilizes. Thomas’ celebrated theorem says τG < ( 2 + and more. If we consider Thomas’ proof too set theoretical, we have here a shorter proof with little set theory. However, set theoretically we get a parallel theorem with...

Titanium Snoreplasty- A New Surgical Technique

Introduction: Based on the previous data, among the general population aged between 30 and 60 years, snoring is observed in 44% and 28% of males and females, respectively. Therefore, it is important to treat snoring to reduce the disruption of the bed partner's sleep and the patients’ own problems. This study aimed to present a minimally invasive procedure which is easy to perform with le...