Engineering fatigue fracture failure is one of the most common phenomena of mechanical and structural failure, statistically representing approximately 50 to 90% of total mechanical damage [1]. Lattice structures have been widely used in crane booms, steel plants, parking garages, offshore platforms and other fields [2] to [4]. In a crane, the lattice boom has better mechanical properties compa...

This paper considers a lightweight boom with an integral hinge consisting of a thinwalled tube made of carbon fibre reinforced plastic with two longitudinal slots. The dynamic deployment of this boom is studied both experimentally and by means of detailed finite-element simulations. The deployment of the boom can be divided into three phases: deployment; incomplete latching, buckling of the tap...

This paper addresses two issues. The first is whether demographic change was plausibly responsible for the run-up in stock prices over the last decade, and whether the attempt by the baby boom cohort to cash out of its investments in the period 2010-30 might lead to an “asset meltdown.” The second issue is whether the rise in dependency that will accompany the retirement of the baby boom cohort...

the primary goal of any economic policy in the production front is, as far as possible to enhance the degree of sectoral interrelatedness (henceforh si) within the home economy. the focal objective of such policy is not only to increase the sectoral value added of the economy but also to improve the position of the trade balance in the commodity trade front. iran, being characterized a sole mon...

This paper presents BOOM version 2, an updated version of the Berkeley Out-of-Order Machine first presented in [3]. The design exploration was performed through synthesis, place and route using the foundry-provided standard-cell library and the memory compiler in the TSMC 28 nm HPM process (high performance mobile). BOOM is an open-source processor that implements the RV64G RISC-V Instruction S...

most of the year kept prospectors at bay, there was little to regulate. But as global warming thaws the ocean’s layers, oil giants, shipping companies and even the odd enterprising tourist operator are casting their eyes towards the high north. The biggest boom could be in oil and gas. The US Geological Survey surprised some experts when it declared that a quarter of the world’s undiscovered re...

Truck mounted concrete pump boom is typical flexible structure. Due to the increasing of boom length, the flexible characteristics play important role in the dynamics behavior. Three simulation models are built. The first is rigid model. The second is flexile model with four booms flexible used modal reduction technique. The last is added with boom hydraulic cylinder equivalent virtual spring d...

Bank of Canada working papers are theoretical or empirical works-in-progress on subjects in economics and finance. The views expressed in this paper are those of the authors. No responsibility for them should be attributed to the Bank of Canada. ii Acknowledgements We thank the editor, three anonymous referees, Dijk and Timo Wollmershäuser as well as numerous conference and seminar participants...

A methodology for the regulation of boom sprayers working in circular trajectories has been developed. In this type of trajectory, the areas of the plots of land treated by the outer nozzles of the boom are treated at reduced rates, and those treated by the inner nozzles are treated in excess. The goal of this study was to establish the methodology to determine the flow of the individual nozzle...

Supersonic Biplane as an Innovative Supersonic Transport Sonic boom noise inhibits the popularization of supersonic aircraft. This study is undertaken to develop a solution to this problem based on supersonic biplane theory. The feasibility of a proposed supersonic biplane concept “MISORA” presented in Fig. 1 has been investigated experimentally as well as numerically. Figure 2 shows a near-fie...