This contribution studies the impact of rotor-stator interaction in a single-stage progressing cavity pump on flow rate and pressure. Specifically, we investigate effect rotor movement sealings formed with deformable stators for various speeds pressures. Sealings are reconstructed help geometric 3D model. We analyze tangential radial deviation from its reference path show that affects rate, whe...

ABSTRACT Optical drives inside PCs operate at high speed, which may result in significant noise. These drives function both as airborne and structural vibration sources. Three main paths can be distinguished through which noise is emitted to the surroundings: (1) the vibrations of the front of the drive emit noise directly into the far field, (2) the sound waves induced by the vibrations of the...

This letter proposes a novel pneumatic soft robotic hand that incorporates mechanism can switch the airflow path using single control. The developed control finger motion and operate surface friction variable mechanism. In mechanism, lubricant is injected onto high-friction to reduce friction. To inject lubrication positive-pressure airflow, Venturi effect applied. design evaluation of airflow-...

As titanium is a highly utilized metal for structural lightweighting, its phases, transformation pathways (transition states), and structures have scientific and industrial importance. Using a proper solid-state nudged elastic band method employing two climbing images combined with density functional theory DFT + U methods for accurate energetics, we detail the pressure-induced α (ductile) to ω...

the aim of this study was to assess the efficacy of apical negative pressure (anp), manual dynamic agitation (mda), passive ultrasonic irrigation (pui) and needle irrigation (ni) as final irrigation activation techniques for smear layer removal in curved root canals.mesiobuccal root canals of 80 freshly extracted maxillary first molars with curvatures ranging between 25° and 35° were used. a gl...

this study investigates the effect of women's employment on family and social relations in the city of aran & bidgol. the theoretical framework of research is role conflict theory. survey methods is used in this study and the statistical population included all women working in the city of aran & bidgol. using cochran's formula and simple random sampling, 250 married women were select...

Technology advances are enabling increasingly dataintensive applications, ranging from peer-to-peer file sharing, to multimedia, to remote graphics and data visualization. One outcome is the considerable memory pressure imposed on the machines involved, caused by application-specific data movements and by repeated crossings of user/kernel boundaries. We address this problem with a novel system ...

The objective of this paper is to develop an outer sheath for flexible endoscopic manipulators. This sheath can switch two states including flexible and rigid, and make a rigid curved path for inserting manipulators. The flexible mode can be curved into a required shape. The rigid mode can hold the shape of the sheath, and then keep the path for instruments. Through the managed path, the flexib...

We study the flow of fluid in porous media in dimensions d=2 and 3. The medium is modeled by bond percolation on a lattice of L(d) sites, while the flow front is modeled by tracer particles driven by a pressure difference between two fixed sites ("wells") separated by Euclidean distance r. We investigate the distribution function of the shortest path connecting the two sites, and propose a scal...

Recent developments in path integral methodology have significantly reduced the computational expense of including quantum mechanical effects in the nuclear motion in ab initio molecular dynamics simulations. However, the implementation of these developments requires a considerable programming effort, which has hindered their adoption. Here we describe i-PI, an interface written in Python that ...