a prototype of a straw chopper, equipped with a discharge system was designed and fabricated in the department of mechanics of agricultural machinery, university of tehran, karaj, iran. to test for the effective performance of the machine, the effects of such parameters as: drum speed (at three levels of: 400, 540, and 800 rpm), screen size (at two levels: 2.5 and 4 cm), and number of blades on...

Electric machine is one of key parts in hybrid electric vehicles which affect dynamical and fuel consumption features and is the kernel to realize all kinds of strategy. Induction motor, PM synchronous motor, brushless DC motor, and switched reluctance motor are all applied in HEV. Traction motors for HEV are different from motors applied in industry. Load changes frequently and widely. Charact...

Automotive and machinery reliability engineers rely heavily on order analysis for examining rotating machinery. While many different techniques for order analysis have been developed, this article introduces the Gabor expansion-based order tracking approach. Compared to other known order analysis methods, this technique is not only more intuitive and more powerful, but can also be used for appl...

This paper aims to outline findings from a research project that has investigated an initiative to stimulate youths to become more entrepreneurial. The concept of summer entrepreneur has been developed in the last decade in a Swedish county. It was developed out of the idea that youths should have a possibility to run their own companies as alternative to traditional summer vacation employments...

Abstract Purpose Thrust bearings play a critical role in high-speed rotating machinery, such as turbines, pumps, compressors, and turbogenerators, by transferring axial loads between the collar bearing pads. The lubricating fluid prevents contact, friction, wear solid parts acts cooling medium. purpose of this study is to evaluate first- second-order coefficients an inclined pad hydrodynamic th...

Maintenance is what is done in machinery to prevent failure or breakdown. In ancient times no proper planning was carried out to do maintenance with the idea behind being simple machines and easy to control. As time progresses people started to find out that it was necessary to safeguard equipment to reduce costs for continuous growth. Maintenance is best divided its phases by world war two due...

In this paper I will present a summary of Turing’s article “Computing machinery and intelligence” [26] and discuss it. I retrace the ideas Turing presented in this paper and explain their historical context. Also, I discuss the impact Turing’s ideas had on the scientific community when the paper was published in 1950 as well as the meaning they still have today. Throughout this paper, I include...

T o d a y ’s control systems have their roots, to a great extent, in the speed control of driving engines (prime movers) and particularly in the speed control of water turbines. The first turbines with automatic speed control appeared sometime in the mid-19th century. In this column, I discuss the history of water-turbine control systems, noting the older inventions and techniques that made pos...