There are several parameters that have significant influence in metal forming process. One of the most important of them is friction coefficient. Friction can change the pattern of metal flow and the force needed for deformation. It is necessary to determine the friction coefficient to study the effect of friction on metal forming process. This study is concerned with numerical and experimental...

The two well-known numerical radius inequalities for the tensor product $$A \otimes B$$ acting on $${\mathbb {H}} {\mathbb {K}}$$ , where A and B are bounded linear operators defined complex Hilbert spaces $$ {K}},$$ respectively \frac{1}{2} \Vert A\Vert B\Vert \le w(A B) w(A)w(B) \min \{ w(A) w(B) \}. In this article, we develop new lower upper bounds $$w(A B)$$ of study equality conditions th...

Introduction: Elbow joint is the second most common joint to dislocate after shoulder. 20 percent of elbow dislocations are associated with fractures. Elbow dislocations are commonly associated with coronoid process, radial head and olecranon fractures. Dislocations of the elbow commonly accompany proximal ulna or radial fracture. Elbow dislocation with a distal radius fracture is rare. In the ...

PurposeThere is a paucity of data regarding recommendations on when to correct for distal radius malunions and if the initial severity radiographic outcomes correlated with ability baseline. We evaluated effects corrective osteotomy preoperative carpal joint malalignment resulting from malunions, injury timing outcomes, developed straightforward classification system predicting radiocarpal midc...

The aim of this paper was to introduce and investigate a new seminorm operator tuples on complex Hilbert space H when an additional semi-inner product structure defined by positive (semi-definite) A is considered. We prove the equality between well-known A-joint in case A-doubly-commuting A-hyponormal operators. This study extension result [Results Math 75, 93(2020)] allows us show that followi...