نتایج جستجو برای: small diameter tube

تعداد نتایج: 964519  

2006
N. M. Mohamed Y. C. Tan A. K. Kadir

Strong and versatile carbon nanotubes (CNTs) are finding new applications in improving conventional polymer-based fibers. Nanotube-reinforced composites could ultimately provide the foundation for a new class of strong and lightweight fibers with properties such as electrical and thermal conductivity unavailable in current fibers. A recent research has discovered that the best type of nanotube ...

Journal: :Journal of orthopaedic research : official publication of the Orthopaedic Research Society 2011
Yuichi Yoshii Jacqueline Henderson Hector R Villarraga Chunfeng Zhao Kai-Nan An Peter C Amadio

The purposes of our study were to correlate ultrasonographically measured and joint angle estimated excursions of the flexor digitorum superficialis (FDS) and flexor digitorum profundus (FDP) tendons of the hand and to estimate the relative motion of FDS and FDP while gripping cylinders of standard diameter in normal human subjects. Thirty wrists from 15 human subjects were imaged with an ultra...

2010

where di and dO are the inner tube and outer tube diameters, respectively. The diameter of the inner tube (di) and outer tube (dO) are estimated as 1.6 nm and 2.2 nm, respectively, from Raman spectroscopy. Here, t is the wall thickness attributed to each nanotube, assumed to be 0.33 nm, equal to the spacing between graphene layers. In addition, Graphite ρ is the density of the graphite, which i...

Journal: :Journal of visualized experiments : JoVE 2015
Nicholas Blumenschein Daewoo Han Andrew J Steckl

Magnetic beads with ~1.9 µm average diameter were used to transport microliter volumes of liquids between contiguous liquid segments with a tube for the purpose of investigating phase change of those liquid segments. The magnetic beads were externally controlled using a magnet, allowing for the beads to bridge the air valve between the adjacent liquid segments. A hydrophobic coating was applied...

Journal: :European review for medical and pharmacological sciences 2004
L Guidi L M Minordi S Semeraro I De Vitis I Roberto S Ennas S Guglielmo L Di Candia A Papa R Urgesi A Grillo M G Brizi A Vecchioli G Fedeli

BACKGROUNDS AND OBJECTIVE Aim of the present study was to evaluate the clinical correlates of small bowel CT patterns in patients with Crohn's disease (CD), as compared to barium studies and endoscopic findings, as far as parameters of disease activity are concerned. MATERIAL AND METHODS Thirty five patients with pathologically proven CD were studied by means of helical single detector CT (13...

The main objective of this research is to improvethe design and performance of the polyurethane foam-filled thin-walled aluminum grooved circular tubes using multi-response optimization (MRO) technique. The tubes are shaped with the inner and the outer circular grooves at different positions along the axis. For this aim, several numerical simulations using ABAQUS finite element explicit code ar...

Journal: :Critical Care 2003
Richard D Branson

Concerns about the work of breathing imposed by the endotracheal tube have led clinicians to routinely use pressure support to overcome this resistive component. More recently, ventilator manufacturers have introduced systems to automatically overcome endotracheal tube resistance, regardless of tube diameter or patient demand for flow. Despite the theoretical advantages, neither method appears ...

Journal: :journal of sciences, islamic republic of iran 2010
v. ahmadi

field ion microscopy (fim) and scanning tunneling microscopy (stm) have found a wide application in nanotechnology. these microscopes use a metallic nanotip for image acquisition. resolution of fim and stm images depends largely on the radius of nanotip apex; the smaller the radius the higher the resolution. in this research, for tungsten nanotip fabrication, electrochemical etching of tungsten...

2008
Snežana Radonjić

The wear of the focusing tube is a very important feature of the abrasive water jet machining. Of all rejected focusing tubes, 85% are worn. Similary, the age of focusing tube influences the cut geometry and quality of machined surface. With regard to the stated, wearing of the focusing tube is subject of this paper. Focusing tube outlet diameter was measured as well as its influence on the sur...

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