Molecular dynamics simulations are used to investigate the influence of molecular-scale surface roughness on the slip behavior in thin liquid films. The slip length increases almost linearly with the shear rate for atomically smooth rigid walls and incommensurate structures of the liquid/solid interface. The thermal fluctuations of the wall atoms lead to an effective surface roughness, which ma...

We consider the Fermi–Ulam model, which can be described as a particle moving freely between two vertical rigid walls; left one being fixed, whereas right moves according to regular periodic function. The is elastically reflected when hitting walls. show that dynamics of model by an area-preserving monotone twist map. Thus, Aubry–Mather sets exist for every rotation number in interval. Conseque...

A highly efficient nuclear transformation method was established for the pennate diatom Phaeodactylum tricornutum using an electroporation system that drives multi-sequence pulses to introduce foreign DNAs into the cells. By optimizing pulse conditions, the diatom cells can be transformed without removing rigid silica-based cell walls, and high transformation efficiency (about 4,500 per 10(8) c...

Isosphaera pallida is an unusual gliding, budding eubacterium recently isolated from North American hot springs. Electron micrographs of ultrathin sections revealed a cell wall atypical of eubacteria: two electrondense layers separated by an electron-transparent layer, with no evident peptidoglycan layer. Growth was not inhibited by penicillin. Cell walls were isolated from sheared cells by vel...

semi-rigid aluminum containers are being used widely in food industries. they have wrinkle shaped walls for strengthening their physical structure. the objective of this study was to assess the effect of wrinkled parts on the heat transfer and temperature distribution of the containers by computational fluid dynamics (cfd) analysis. therefore, a precise designed geometry of the wrinkled walls c...

Diatoms are microscopic, single-celled algae that possess rigid cell walls (frustules) composed of amorphous silica. Depending on the species of diatom and the growth conditions, these frustules can display a wide range of different morphologies. It is possible to design and produce specific frustule morphologies that have potential applications in nanotechnology.

Necrotizing tracheobronchitis and acute airway obstruction from invasive mycosis developed in a patient who had undergone bone marrow transplantation. The infectious process obstructed the airway and disintegrated the walls of the right mainstem bronchus and pulmonary artery. The airway was cleared using rigid bronchoscopy to extract the detritus. The patient died of hemorrhage after rupture of...

A bar-slider framework is a bar-joint framework a part of whose joints are constrained by using line-sliders. Such joints are allowed to move only along the sliders. Streinu and Theran proposed a combinatorial characterization of the infinitesimal rigidity of generic bar-slider frameworks in two dimensional space. In this paper we propose a generalization of their result. In particular, we prov...