We address the quality of electrical contact between carbon nanotubes and metallic electrodes by performing first-principles calculations for the electron transmission through ideal 2- and 3-terminal junctions, thus revealing the physical limit of tube-metal conduction. The structural model constructed involves surrounding the tube by the metal atoms of the electrode as in most experiments; we ...

AIM We describe a modified form of traditional open surgery with a new guide tube. This guide tube permits anterior screwing of odontoid in a shorter time with a more simple technique as compared to traditional open surgery, endoscopic and percutaneous surgeries. MATERIAL AND METHODS Our series includes 6 patients who were operated for unstable odontoid fracture. We used a new guide tube for ...

The propagation of small-amplitude waves in a thick-walled long viscoelastic tube of variable cross-section, filled with a viscous incompressible fluid, is considered with account for wave reflection at the tube end in application to arterial pulse wave propagation. A solution is obtained in the form of expansions in a small parameter. The effect of the coefficient of wave reflection at the tub...

A steam generator is the major component of a nuclear power plant and its integrity is crucial for the nuclear safety. Steam generator tube eddy current bobbin inspections are periodically performed for utility to detect tube degradation. Scaled deposits on the steam generator tubes cause the performance degradation problem and the thickness of the outer diameter tube surface can be measured us...

The laryngeal tube suction II (LTS-II; VBM, Medizintechnik GmbH, Sulz, Germany) is a recent version of the laryngeal tube (LT) family of supraglottic airway devices originally intended for emergency airway management including out of hospital use 1,2 and unexpected difficult airway situations 3,4, but which are currently also used during general anaesthesia 5-11. The original LT consists of an ...

A new simple and sensitive detection tube to detect hydrogen cyanide in the air has been developed. The detection tube is based on the reaction of hydrogen cyanide with 4-nitrobenzil to form a violet colored product. The reaction takes place on a carrier made of a composite material, which was prepared by pelletization of a mixture of microcrystalline cellulose and MgO. The detection tube can d...

The hydraulic simulation and structure coupled analysis were used to explore critical heat flux (CHF) margin of the W (tungsten) armour and the accommodation of the thermal stress between the cooling tube and the W armour. The t (wall thickness of the F82H tube) variation or as a constant were considered to analysis the heat removal capability of the cooling tube. It was found a nonlinear distr...

INTRODUCTION Leiomyoma of the fallopian tube is extremely rare, and its version - leiomyoma cellulare (LC) of the fallopian tube is absolutely unique. Aim of the study was to review literature reports on leiomyomas of the fallopian tubes, and to present cases of leiomyoma and LC of the fallopian tubes in the patients operated on in our ward. MATERIAL AND METHODS There were fewer than 100 case...

Tube spinning is an effective plastic-forming technology for forming light-weight, high-precision and high-reliability components in high-tech fields, such as aviation and aerospace. However, cracks commonly occur in tube spinning due to the complexity of stress state, which severely restricts the improvement of the forming quality and forming limit of components. In this study, a finite elemen...

This article addresses the dynamic modeling of geometrically exact sliding Cosserat rods. Such systems need to consider non-material time-varying domains which Lagrangian view point solid mechanics is inappropriate. In here presented, we use model inextensible Kirchhoff rods along a domain whose time variations are not necessarily imposed but governed by dynamics, i.e. depend on configuration r...