Posterior interosseous nerve entrapment is a potential cause of upper extremity muscle weakness and pain. The diagnosis may be difficult to make clinically, and electrodiagnostic tests may not identify the exact site of nerve compression. We report a case of posterior interosseous nerve entrapment in which electrodiagnostic studies suggested radial neuropathy at the level of the spiral groove, ...

Iatrogenic injury during the posterior approach to the humerus during operative fixation is not an uncommon occurrence. A comprehensive understanding of the normal anatomy and its variants is of paramount importance in order to avoid such injury. Typically, the inferior lateral cutaneous branch of the radial nerve originates towards the distal end of the humerus at the inferior portion of the s...

In this paper, an analytical formula to calculate the radial stiffness of groove elastic support is presented. The influence of structure parameters on radial stiffness and homogeneity of radial stiffness is investigated as well. The accuracy and calculating speed of the analysis formula are compared to that of finite element method (FEM). Findings are as following: The calculating speed of ana...

Abstract The surface textures of non-contacting mechanical seals form a few micrometers thick lubrication film that aids in achieving high performance the seal. Improved texture design can control internal fluid flow, improving sealing and characteristics. However, thickness is sensitive to thermal deformation, making vulnerable heat. Excessive temperature increases deviations distribution caus...

Hildoceras bifrons (Bruguière, 1789) is a cosmopolite ammonite species from the Lower Jurassic of Boreal and Mediterranean (Tethys) palaeogeographical provinces. Inter-demic phylogenetic variability are noticeable, also affecting most distinctive morphological trait: spiral groove along whorl flank. Since XIX century, however, number morphotypes assigned to (many which Apennines other Italian l...

In order to meet the requirements of rice field precision direct seeding in rows and hills, a spiral grooved seed metering device for hills is designed. The Matlab software used study movement trajectory buds groove during process. Based on quadratic regression-orthogonal rotation combination design, taking working speed wheel, length helix angle as test factors, well qualified rate hill diamet...

Purpose This study aims to the gas film stiffness of spiral groove dry seal. Design/methodology/approach The present represents first attempt calculate in consideration slipping effect by using new test technology for seals. First, a theoretical model modified generalized Reynolds equation is derived with micro gap Second, examines micro-scale vibration and stationary ring determine establishin...

This study explored the effect of porosity and installation angle, thickness (dimension) and second layer of permeable obstacles on density current control and trapping in the laboratory. For this purpose, an insoluble suspended polymer and two types of groove and cavity obstacles made from plexiglass sheets were selected. The experiments were conducted with two different concentrations, five d...