Contreras, B, Vigotsky, AD, Schoenfeld, BJ, Beardsley, C, McMaster, DT, Reyneke, JHT, and Cronin, JB. Effects of a six-week hip thrust vs. front squat resistance training program on performance in adolescent males: A randomized controlled trial. J Strength Cond Res 31(4): 999-1008, 2017-The barbell hip thrust may be an effective exercise for increasing horizontal force production and may thereb...

This paper presents the design, development and characterization of contractile water jet thruster (CWJT) for mini underwater robot. Instead of electric motor, this CWJT utilizes the Ionic Polymer Metal Composite (IPMC) as the actuator to generate the water jet. The main focus of this paper is to analyze the conceptual design of the proposed CWJT which would determine the thrust force value, je...

This work presents a cyber-physical drilling machine that incorporates technologies discovered in the fourth industrial revolution. The is designed to realize its state by detecting whether it hits or breaks through workpiece, without need for additional sensors apart from position sensor. Such self-recognition enables adapt and shift controllers handle position, velocity, force, based on workp...

This paper presents a study of hole quality and energy consumption in the process of drilling a thermoplastic polymeric material, polyether-ether-ketone, reinforced with 30% glass fibers (PEEK-GF30). PEEK-GF30's capacity to be machined has focused on turning operations. Studies of drilling involving thermoplastic polymeric materials have considered materials with other types of matrices, or rei...

Fiber reinforced polymer (FRP) composites have been steadily replacing metals as choice engineering materials for various applications. Although FRPs can be manufactured to near-net shape, post processing operations such as machining are required to create some features (such as holes). In order to drill holes efficiently with the least waste and defects, it is essential to understand the machi...

The widespread use of heat treatable7075 aluminum alloy in the aerospace industry requires a high machinability performance. main objective this study is to examine and surface quality conditions AA7075 material with different temper conditions. For purpose, various treatments are implemented evaluate impact microstructural properties on tool wear drilled holes. drilling operations have been do...

Anumerical study was conducted to investigate the effects of airfoil thickness on the thrust generation of plunging airfoils and to assess the contributions of pressure and viscous forces in flapping propulsion. A series of NACA symmetric airfoils with thickness ratio ranging from 4.0% to 20.0% of the airfoil chord length were used in the present study to undertake a same sinusoid plunging moti...

Abstract A great deal of attention is currently paid to recycling or reusing carbon fibres, as it improves sustainability and the lifetime products. The applicability recycled fibre–reinforced polymer (rCFRP) composite materials supported by results material scientists; however, machinability rCFRPs has not been analysed yet. virgin was compared analysing cutting force torque in drilling. Six d...

In order to improve the tool life and micro-hole machining quality, H-shaped chisel edge micro-drill (HCE-MD) was developed in this paper. The HCE-MD characterized by inner formed through thinning. micro-drilling process, can perform positive rake cutting, so area of workpiece extruded cutting with a negative angle is reduced. Based on this, distribution near corner improved. Then, fabricated s...