Crimson Publishers-Mechanical Engineering

Usage of Process Models for Quality Management System: A Case Study of Energy Company by Kashif Mahmood*, Taivo Kangilaski and Eduard Shevtshenko in Evolutions in Mechanical Engineering Business Process Management is the most important part of nowadays management. It ties company employees to work together towards a common business goal as well as dismantle existing business connections if they do not work properly. Thus, it is important to understand the dynamics of processes in the context of employees and assessment of risk during the execution of processes. The current article describes the possible usage of process models in the sense of quality management based on performed case study. The aim of this paper is to describe how process modelling approach facilitates to manage elements of a Quality Management Systems (QMS) such as organizational structure and responsibilities, business processes, information management and control of documents. https://crimsonpublis...

Evolution of Engineering Acoustic Waves with Metamaterials by Craig SR and Chengzhi Shi* in Evolutions in Mechanical Engineering Acoustic waves are the physical manifestation of mechanical vibrations traveling through a medium. These wave propagations can be described with physical attributes, such as phase, wavelength, amplitude, and velocity. The velocity of an acoustic wave can be determined by two material properties of the propagation medium: the bulk modulus and the density. Specifically, the squared phase velocity of an acoustic wave equals the bulk modulus multiplied by the inverse of the density. For all natural medium, positive bulk modulus and density are observed. The recent development of acoustic metamaterials demonstrate media that exhibit either a negative bulk modulus, a negative density, or both negative bulk modulus and negative density. As the fundamental physics of these metamaterials become better understood, researchers are beginning to develop applica...