This edition contains engineering research results in mechanical engineering, mechatronics and construction. The last section is devoted to studying seismic activity related to the state of oceanic mass, modelling techniques for groundwater management, and applications of flash flood hazard assessment techniques. Presented research results will be helpful to many specialists in mechanical engineering, mechatronics, construction, and environmental engineering.Table of Contents: Chapter 1: Machine Modelling and Designing Numerical Analysis of Steel Elevator Car Frame: Sensitivity to Element Connections Probabilistics Design and Analysis of Metal Interference Fits The Impact of Nanofluid on Natural Convection in an Isosceles Rectangular Container with a Heat Source Harvesting Electrical Energy from Automatic Sliding Doors Use Dynamic Characteristics of a 5-kN Thrust Gas Turbine Front Bearing Composed of a Vibration Absorber Element and Deep Groove Ball Bearing Chapter 2: Construction Materials Effect of the Addition of Aggregates Derived from Used Tires on the Mechanical Behavior of Clay Effect of Long-Term Aging on the Behavior of Batu Pahat Soft Clay-Modified Asphalt Mixture Chapter 3: Environmental Research The Conductivity of the Oceans. Analysis Based on the Seismic Energy Theory Simulation-Optimization Modeling Techniques for Groundwater Management and Sustainability: A Critical Review Recent Applications of Flash Flood Hazard Assessment Techniques: Case Studies from Egypt and Saudi Arabia