dependence of thermoelectric power of semiconducting carbon nanotubes. Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. The MIT Faculty has made this article openly available. Please share how this access benefits you. Your story matters. We calculate the thermoelectric power (or th...

Conventional gastroscopes have a diameter of 8.8-12 mm; ultrathin endoscopes have an outer diameter of 5.3-5.9 mm. We share our experience with 50 patients who underwent transnasal esophagogastroduodenoscopy using an ultrathin endoscope. The indications included endoscopyassisted nasogastric tube placement in 25 patients, tight lesions not negotiable with conventional endoscope in 9, restricted...

The present study investigated the effect of wall roughness on velocity, cellular structure, and limits detonation propagation in tubes. Wall was effected by placing a wire spring into tube. Since diameter is small compared to tube diameter, spiral more representative than repeated orifice plates used majority previous studies. Detonation velocity determined from time-of-arrival ionization prob...

Rapid suppression is a must in the mitigation of ventilation air methane (VAM) explosions. Flame proves to be much more challenging than prevention flame initiation due small physics timescale (~1 s). This study numerically investigates effect spherical obstructions on propagation dynamics tube closed at one end. Obstructions with an inflating geometry, installed different locations, were exami...

The different branch diameters of five-way tube affect the design loading internal pressure in hydroforming process, where large-diameter is broken more easily than small-diameter one due to same ultimate stress material one-step forming method. Therefore, first four-way and then multi-step (FFTF) method three-way (FTTF) were proposed fabricate 5A02 aluminum alloy with two kinds avoid burst tub...

Mathematical models considering motile bacterial transport within a geometrically restrictive cylindrical tube were developed. Two macroscopic transport parameters, the random motility coefficient as a self-diffusion coefficient of the cell population and the chemotactic velocity as a chemical-induced velocity, were derived. The three-dimensional cell balance equation was reduced to forms simil...