Applied Research and Smart Technology (ARSTech)			
            
            
            
            
            
            
            
            Aims International Journal of Applied Research and Smart Technology (ARSTech) is a peer-reviewed, biannual journal that promotes the development and application of smart technologies in various sectors, such as mechanical & materials engineering, automotive & manufacturing process, energy conversion & renewable energy, robotics, mechatronic & artificial intelligent, chemical & biomedical engineering, marine & aerospace technologies, transportations, infrastructures and environment. Smart technologies offer practical and sustainable solutions in the modern life of humankind by employing the latest technological advancements. Scope The journal presents and disseminates new developments and the latest findings in all fields of engineering and technology, especially those that contribute to the implementation of smart technologies. The topics covered by the journal include but are not limited to: autonomous systems, mechatronics and robotics, control systems in automobiles and intelligent transport systems, smart structures, materials, and metallurgy nanotechnologies and advanced materials in engineering application, sustainable and green buildings, green technology and industry 4.0, IoT-based systems, sensor network, artificial intelligence and smart grids, biomedical engineering, bioenergy technologies, design and development of automotive technologies and manufacturing process, vehicle modelling and safety, modelling and simulation (CFD) in engineering application, vehicle design and aerodynamics, applied mechanics, structure and manufacturing technology, material processing and technology for vehicles and other mechanical use, coatings technologies in engineering application, engine technologies and development for vehicles and other engineering application, hybrid and electric vehicle technologies, vehicle braking and suspension systems, thermodynamics application in engineering application, combustion and reacting flows in automotive and other engineering application, applied heat and mass transfer, fluid and thermal engineering, heating and cooling systems (HVAC) in vehicles and engineering application, fuels and lubricants in automotive engineering, development of energy conversion and conservation, new-and-renewable energy, and alternative energy in engineering application, fuel cell and solar energy, the engine technology and emission control, automotive pollution and control, vehicle motion and control systems, noise and vibrations control, pneumatic and hydraulic systems, tribology in engineering application.
            
            
         
        
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                            Contact stress analysis of a spur gear using Lewis and Hertz theory 
                        
                        Muhammad, Aisha; 
Haruna Shanono, Ibrahim                        
                         Applied Research and Smart Technology (ARSTech) Vol. 2 No. 2 (2021): Applied Research and Smart Technology 
                        
                        Publisher : Universitas Muhammadiyah Surakarta 
                        
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                                    DOI: 10.23917/arstech.v2i2.165                                
                                                    
                        
                            
                                
                                
                                    
The rapid development of the automobile and aircraft industries has made applying gear technology necessary. Gears offer the benefits of efficiency, reliability, simplicity and a higher speed ratio with power transmission. However, they cannot transmit power over a long period, are more expensive when compared to belts and chain drives and requires continuous lubrication. They are used for transmitting high load in gear tools. The gear teeth fail when subjected to a high load beyond a certain limit. A deciding factor in gear design is the amount of stress developed on the contact surface of the mating gears. This paper deals with contact stress analysis of spur gear. The theoretical analysis presented in this paper aims to analyse rolling bearing contacts based on the principles of the Hertz and Lewis equations. A 3D domain-based finite element method was used to calculate the stresses between the contact surfaces of the structure. Contact analysis was performed using ANSYS Workbench software to figure out the deformation and optimum stress developed on the teeth of the gear. The simulation results indicated that the stress distribution on the gear contact surface has a maximum value of 144.82 MPa, while the deformation is at a maximum value of 0.01676 mm. The safety factor indicates the maximum level of 15, indicating the safety of the design.
                                
                             
                         
                     
                    
                                            
                        
                            Investigation of heat treatment strategies for improvement of production capacity of coin stamping dies 
                        
                        Sutisna, Nanang Ali; 
Permana, Fahyudha                        
                         Applied Research and Smart Technology (ARSTech) Vol. 2 No. 2 (2021): Applied Research and Smart Technology 
                        
                        Publisher : Universitas Muhammadiyah Surakarta 
                        
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                                    DOI: 10.23917/arstech.v2i2.405                                
                                                    
                        
                            
                                
                                
                                    
This paper presents a study on the production capacity of stamping dies for minting coins under different heat treatment processes, particularly austenite temperatures, using a vacuum furnace. In the study, the specimen material was made from Bohler K340 steel. The first heat treatment strategy included heating the specimens to a stable austenite temperature at 1080°C, then holding for 120 minutes and cooling rapidly with gas quenching media with a pressure of 5 bar. Tempered treatment was performed at 500°C. Another strategy was similar to the first one, except the heating temperature at 1060°C and double tempering at 575°C. After the heat treatment process, microstructure observation and hardness testing were carried out. Finally, the production of the die capacity testing on the coining machine was conducted. The results of the specimen surface photographs of the two heat treatment strategies show a significant difference in the microstructure, similarly with the hardness value obtained from single tempering is 61.98 HRC and from double tempering is 57.94 HRC. The production capacity test result indicates that the average capacity of first and second dies are 101,250 coins and 171,150 coins, respectively. It means that the second dies exceed the minimum standard production capacity of dies as determined by the Quality Control department, which is 150,000 coins.
                                
                             
                         
                     
                    
                                            
                        
                            Concept design and simulation analysis of floating water turbine 
                        
                        Al-Quraishi, Mohammed Baqer Zaki Yahya; 
binti Mohd, Siti Syafiqah; 
Sarip, Shamsul; 
Binti Mohammad, Roslina; 
Mad Kaidi , Hazilah                        
                         Applied Research and Smart Technology (ARSTech) Vol. 2 No. 2 (2021): Applied Research and Smart Technology 
                        
                        Publisher : Universitas Muhammadiyah Surakarta 
                        
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                                    DOI: 10.23917/arstech.v2i2.428                                
                                                    
                        
                            
                                
                                
                                    
Researchers in Malaysia are attempting to advance and develop the renewable energy sector in response to increased emissions, fossil fuel exhaustion, and the need for electricity in remote areas. Water turbines are known to have a high potential for generating electricity. This paper aims to propose a new floating turbine concept and analyse it using Computational Fluid Dynamics. In the study, finding the idea started with infaring the market needs in Malaysia and transforming them into design requirements by utilising tools like the requirement table and the objective tree. After that, the requirements were changed to a function box to understand the functionality of the turbine. A task specification table was implemented to assign the specifications and create four concepts. One of the four concepts was chosen using the evaluation chart to undergo CFD analysis. The selected concept was validated using the dynamic mesh technique in ANSYS Fluent. A grid independence study and boundary sensitivity study were conducted to ensure the accuracy of the solution. The sliding mesh technique measured the performance of the turbine. It was found that the proposed turbine has higher performance than typical Savonius turbines, from 0.1 to 0.42 and 0.8 to 1.3  (Turbine Performance) and TSR (Tip Speed Ratio), respectively.
                                
                             
                         
                     
                    
                                            
                        
                            Sustainability and friendly circulation path in Sangiran museum, Sragen Indonesia 
                        
                        Hanendya, Seruni Inas; 
Syamsiyah, Nur Rahmawati                        
                         Applied Research and Smart Technology (ARSTech) Vol. 2 No. 2 (2021): Applied Research and Smart Technology 
                        
                        Publisher : Universitas Muhammadiyah Surakarta 
                        
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                                    DOI: 10.23917/arstech.v2i2.440                                
                                                    
                        
                            
                                
                                
                                    
Museums are windows into a country's past. Museums can tell stories about history and life. Sangiran museum is one of the world's heritages that tell the story of human evolution from prehistoric times to the present. The presence of historical or other information in the museum heavily relies on the zoning of space and circulation paths. The circulation of visitor movements between spaces and buildings significantly impacts the museum's function. Submission of historical information to visitors will be easier to understand if there is good circulation, which supports visitor movement activities. In the observations, the movement of visitors at the Sangiran museum has constructed an uncomfortable feeling for the users. This study aims to assess the circulation path's compliance with government standards. Due to the nature of this study, a descriptive qualitative approach is required. The study discovered three types of circulation paths that were not user-friendly, namely ram, stairs, and hallways. They did not meet Indonesian government and international data architecture standards. Hence, this study proposes an easy-to-implement design to ensure the long-term function and sustainability of the circulation pathway.
                                
                             
                         
                     
                    
                                            
                        
                            Optimisation of power quality in solar/wind power stations using developed artificial bee/ant hybrid heuristic algorithm 
                        
                        Zile, Mehmet                        
                         Applied Research and Smart Technology (ARSTech) Vol. 2 No. 2 (2021): Applied Research and Smart Technology 
                        
                        Publisher : Universitas Muhammadiyah Surakarta 
                        
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                                    DOI: 10.23917/arstech.v2i2.442                                
                                                    
                        
                            
                                
                                
                                    
Voltage regulation needs to be optimised to reduce energy losses and improve power quality in renewable solar/wind plants. The Artificial Bee/Ant Hybrid Heuristic Algorithm has been developed in the study, and voltage regulation was optimised using this developed algorithm. A computer program in the C++ programming language was developed to prevent the undesired effects of electrical events occurring during the integration of renewable energy sources and to make the system work more efficiently. The interface of the program was made using the Visual Studio program. It became possible to produce power estimation, power quality estimation and power loss estimation using the intuitive artificial bee/ant hybrid algorithm created on the data set obtained from solar and wind power plants. It was found that there is a ± 4% difference between the values obtained with the developed algorithm and the computer program and the values obtained from the power plants. The developed algorithm and the computer program successfully optimise power quality in solar/wind power stations. The study makes it possible to estimate the amount of energy produced, the amount of energy loss, and the quality of energy in solar/wind power stations.