The concept of communication media repertoires introduced by Watson-Manheim and Bélanger (2007) has extended the existing literature by adding a technology-in-practice perspective to the examination of communication media choice in an organizational setting. While Watson-Manheim and Bélanger (2007) have focused on describing the existing media repertoires (set of available media and existing us...

The present work deals with the effect of an external circumferential elliptical crack located at thickness transition on a varied stepped diameter pipe . The purpose is the application of the extended finite element method (XFEM) for the calculation of SIF at the thickness transition region of pipe considering internal pressure and compare the effect of the crack between pipes straight and wi...

The effect of fine particles on turbulence damping and reduction of flow friction coefficient in ribleted pipes, have been investigated experimentally. Tests have been conducted in a ribleted pipe with hydraulic diameter of 18.6 mm, and 20 stream wise riblets of 1.8 mm depth, along the pipe. Flows of water tap with Reynolds number from 5000 to 30000 were compared with flows containing silt-clay...

Local strain measurements opposite gravel contacts and around a single isolated perforation are reported for a high-density-polyethylene pipe (320 mm outside diameter, 32 mm thick) typical of that commonly used as part of the leachate collection system in municipal solid waste landfills. Emphasis is given to examining the localized effect of coarse gravel contacts on pipe strain and the strain ...

In this paper a combination approach of two heuristicbased algorithms: genetic algorithm and tabu search is proposed. It has been developed to obtain the least cost based on the split-pipe design of looped water distribution network. The proposed combination algorithm has been applied to solve the three wellknown water distribution networks taken from the literature. The development of the comb...

Temperature fluctuation in fluid causes high cycle thermal fatigue in shroud structure according to its amplitude and frequency. There are still some incidents of thermal fatigue and leakage in light water reactors (Japanese PWR Tomari-2 in 2003, French PWR CIVAUX in 1998), and also in sodium cooled reactors (French FBR PHENIX in 1992). Mixing tee is a typical component where temperature fluctu...

This paper proposes a magnetic actuator system of a new type capable of inspection in a complex pipe by means of a new motion principle. Using plural vibration components, the magnetic actuator is able to move in the complex pipe. A magnetic actuator of the reversible type, due to opening and closing of a compound material by using elongation and contraction of four shape-memory-alloy (SMA) coi...

In order to study the performance of dynamic positioning system during S-lay operations, dynamic positioning system is simulated with the hull-stinger-pipe coupling effect. The roller of stinger is simulated by the generalized elastic contact theory. The stinger is composed of Morrison members. Force on pipe is calculated by lumped mass method. Time domain of fully coupled barge model is analyz...

The application of Max-Min Ant System for layout and size optimization of pipe networks is described in this paper. The formulation conventionally used for pipe size optimization of networks with fixed layout is extended to account for layout and pipe size determination of the networks. This is achieved by including a new constraints regarding the reliability of the network and modifying the av...

The electroma.gnetic, noncontact transducer (EMAT) is particularly well suited to ultrasonic inspec~ tion problems where it is difficult or impossible to couple the sound into the object being tested ~ through a liquid or grease layer. For inspecting buried natural gas pipelines, the inspection process must be carried out by a self contained instrument package blown through the pipe by the gas ...