SUMMARY. Rohmatin et al., in their paper, identified the movements that occur when using a portable study table and analyzed indications of user posture risks that could be experienced when utilizing a portable study table. Wahyudi and Kusuma, in their paper, analyze heat rate losses due to parameter deviations according to actual conditions and calculate cost savings and possible improvements to determine the performance of PLTU Banten 3 Lontar unit 2. Medikano et al., in their paper, innovate the wrench to simplify the machine maintenance process. Prasetyo et al., in their report, designed, developed, and tested a prototype of a grain drying machine based on hybrid PLTS technology. This research focuses on drying machine power calculations, thermal analysis, grain drying efficiency, and evaluation of PLTS systems. Sukarno et al., in their paper, developed an automatic water recirculation system to save clean water use and energy consumption in tilapia cultivation using a microcontroller based on pH and turbidity values ​​(NTU). Wijianto and Alfitrah, in their paper, simulated the fluid flow in this downdraft-type gasification installation to determine the influence of heat distribution or temperature in the gasification equipment installation and the effect of the mass flow rate of cooling water on the airflow out of the reactor. Widodo and Golwa, in their paper, carried out an analysis using finite element methods (FEM) to simulate complex physical phenomena to obtain deformation and strain values ​​for HSS chisels in the turning process with ST42 steel workpieces. Nuha and Golwa, in their paper, analyzed the wear value of carbide-type tool edges in the ST41 material turning process based on the friction force between the tool and the workpiece.

SUMMARY. Firmansyah et al., in their paper, conducted local stress analysis using finite element-based software. The study is carried out on the static load that comes from the ship when it is anchored at the harbour. This analysis aims to determine the fender's stress characteristics and maximum stress value. Yuniadi and Kurniawan, in their paper, analyzed the strength and safety factor of the chassis using the finite element method to determine the safety factor in the chassis design that was made. Yusniansyah and Kurniawan, in their paper, designed a dump truck body by adding a larger body capacity than the standard body. The standards used for determining the mass of material to be transported are in accordance with ISO 6483: 1980. Darmawan and Kurniawan, in their paper, determine the wear rate of the brake pad so that the prediction of the service life of the brake pad is known and the factors causing the difference in the wear rate of the brake pad installed on the trailer bogies and motor bogies. Yulianti et al., in their paper, discuss the hydrogen output monitoring system on Fuel Cell Electric Vehicles (FCEV) using the Node-RED software application and regarding flowmeters with RS 232 output. Syaka et al., in their paper, add injectors that aim to improve fuel delivery fuel at high speed, which is expected to boost the power and torque of the standard vehicle. The vehicle used is a motorcycle with a programmed fuel injection (PGM-FI) system for the fuel atomizer. Sugiyanto et al., in their paper, varied the heating temperature and hydraulic pressure on the box and gear moulds using an injection moulding process to produce the maximum mould shape for the box and gear shapes. Basori et al., in their paper, designed a storage rack capable of accommodating and holding a load of gas cylinders and their contents and can be mobilized at a certain height.

SUMMARY. Syaka, et al., in their paper, analyzed the comparisons and differences in variations in setting injection duration and ignition timing for engine power output using Pertamax fuel using experimental methods. Riyadi, et al., in their paper, analyzed the effect of CDI and spark plug variations on the performance and fuel consumption of the Vespa Strada motor. This research was conducted to determine the effect of using variations of the CDI limiter and CDI unlimiter with spark plugs on torque, power, and fuel consumption using Pertamax fuel. Sopiyan, et al., in their paper, conducted experiments with two types of calipers to know the distance and braking time on a 125 cc motorcycle. Riyadi, et al., in their report, conducted experiments with roller weight variations to get the best acceleration value on the Honda Vario 150 automatic motorcycle. Rohmatin, et al., in their paper, discussed the development of chip packaging designs according to customer wishes using the quality function deployment (QFD) method. Muhammad and Yulianto, in their report, determined an excellent overhaul planning using the help of the Python programming language with the linear regression method. Setiawan, et al., in their paper, conducted a simulation analysis and fabrication of the frame to obtain the design of the frame and power for electric motorcycle applications. Juwardi, et al., in their paper, determined the standard time and productivity in the glass cleaning work of building X using the stopwatch time study method.

SUMMARY. Rohmatin et al., in their paper, discuss forklift performance analysis, where this paper aims to find out whether forklift performance is still within the standards set by using the overall equipment effectiveness (OEE) method. Syaefudin et al., in their paper, analyze the calculation of the control and power design of portable Senai tools to get the appropriate power requirements in the field. Syaka et al., in their paper, conducted an experimental study of the performance of an air compression engine with modified centric gear on 4-stroke internal combustion, which was changed to 2-stroke by modifying the centric gear ratio from 2:1 to 1:1. Syamsuir, in their paper, carried out the electroplating process of copper and nickel to know the effect of the layer formed on Ms 7210 low carbon steel on the corrosion rate. Susetyo et al., in their paper, discuss the design and testing of cutting support devices with a rectifier rail system for plasma cutting operations. Fikri et al., in their paper, conducted research in the field of welding to know the effect of current strength on penetration depth, welding width, and hardness in the heat-affected zone (HAZ) of ST-37 steel. Wulandari and Dhiyaulhaq, in their paper, reviewed articles with a discussion on the use of exhaust heat from several transportation methods to cool cabins or products through conceptual research by reviewing related literature. Hartono et al., in their paper, designed a rice planter using the jajar legowo system, which has an optimal axle and finned wheel design.

SUMMARY. Sari et al., in their paper, discusses the hardness and corrosion resistance of hard facings on the surface of carbon steel. This paper aims to analyze the effect of hard facing and heat treatment on low carbon steels on increasing hardness and corrosion resistance. Tyassmadi et al., in their paper, examines the relationship between the implementation of tune-up standard operating procedure of motorcycle to the performance of mechanics in a workshop in Jakarta to know the contribution of the implementation of tune-up standard operating procedure of motorcycle to the performance of mechanics. Susetyo et al., in their paper, conducted a maintenance analysis on the critical components of the degreaser engine at PT X to determine the level of reliability of the main machine. Dwiyati et al., in their paper, carried out the weight lost the copper-nickel/copper-nickel-silicon layer of electroplating in HCl solution. The weight loss determines the effect of the time variation in electroplating coating copper-nickel/copper-nickel-silicon against the corrosion rate in low carbon steel. Basori and Iswadi, in their paper, discuss heating steel material with a carbon content of 0.074 wt. % up to a temperature of 1000 °C, then carried out variations in the holding times in the furnace for 10, 20, and 30 minutes and then quenched with coolant media to see the phenomena that occur. Syamsuir et al. carried out sandblasting with various pressures (4, 5, and 6 bar) to see the characteristics of the formed layer. Syaka et al., in their paper, mixed bioethanol as fuel to see its effect on engine performance and exhaust emissions in a four-stroke single-cylinder gasoline engine. Widodo, in his paper, analyzed shaft wear on the Hitachi Ex-100 front idler backhoe, which often occurs at the Highways Service Office of Kudus Regency, so that in the future damage to this track system can occur.

SUMMARY. Susetyo, et al., in their paper, analyzed the effect of polarity and cooling medium on the surface hardness value of low carbon steel hard facing. Sopiyan and Syamsuir, in their paper, carried out the hard-facing process using the SMAW type, with DC+ polarity, 130A current, and 350 HV electrodes and then heat treatment. Sari and Prasetyo, in their paper, analyzed low carbon steel that had been welded by the E6013 electrode and added carbon (C), then heated at 1000 ^oC for 20 minutes and then cooled rapidly by quenching with coolant to increase hardness. Basori, et al., in their paper, analyzed the factors causing the failure of the bus leaf spring with a capacity of 7 tons. Syaripuddin, et al., in their paper, discusses the effect of nickel plating and the addition of carbon elements on the E6013 electrode on the mechanical properties of low carbon steel welding results regarding the hardness value. Sugita, et al., in their paper, carried out the process of designing an egg incubator with a hybrid energy source. Dwiyati, et al., in their paper, made efforts to increase the hardness of carbon steel material with variations in holding time and variations in cooling media. Syamsuir, et al., in their paper, analyzed the effect of stirring when coating copper on aluminum on the corrosion rate.

SUMMARY. Hidayat and Nofendri, in their paper, discuss the selection of the best angle of attack for the NACA 0013 airfoil wing when taking off using fluent Ansys. Setyawan, et al., in their paper, conducted an initial design for the development of a military striped fabric with a bush motif. Ramadan and Cappenberg, in their paper, analyzed the performance testing of refrigerant R-22 which was carried out in actual simulation using Genetron Properties software. Susetyo, et al., in their paper, analyze the effect of PWHT on the mechanical properties of low carbon steels regarding tensile strength and hardness values. Yoga and Putri, in their paper, analyzed the effect of variations in the length and diameter of the capillary tube on the performance of the AC cooling system. Sukarno, in his paper, uses condensate water for pre-cooling or pre-cooling in the condenser and sees how it affects the performance of air conditioning in the form of coefficient of performance (COP). Saidah, et al., in their paper, analyzed the effect of fiber volume fraction on the mechanical strength of epoxy-rice straw fiber composites and yukalac 157 resin rice straw fibers.

SUMMARY. Dwiyati, et al., in their paper, discusses the effect of gas flow rates of 1 L/min, 3 L/min, and 5 L/min on the hardness value of low carbon steel in the GTAW process. Basori, et al., in their paper, discusses designing a corn thresher machine with a 300 kg/hour production capacity. Adnan and Soegijono, in their paper, analyzed the intrinsic hysteresis curve of zinc oxide (ZnO) material. Kholil, et al., in their paper, analyzed the relationship between the diameter of the blade and ring on the chopping results on a plastic cup chopper so that the size of the blade and ring that can cut will be obtained. Syamsuir, in his paper, discusses the effect of tempering temperature and long tempering resistance on the hardness and wear resistance of HQ 760 steel. Nofendri, in his paper, discusses the addition of ethanol as a non-fossil fuel mixed with 5% and 10% RON 92 and RON 88 gasoline to determine the effect on fuel properties (research octane number, density, calorific value of fuel) and engine performance (power, torque, fuel consumption, and thermal efficiency). Syahril and Hidayat, in their paper, redesigned pneumatic equipment based on programmable logic control (PLC) for practical activities. Setyawan, et al., in their paper, designed a bicycle wheel with spokes made of wood.

SUMMARY. In his paper, Harini analyzed the heat transfer rate calculation in a double-pipe heat exchanger at the Laboratory of the University of 17 August 1945, Jakarta. Dewi and Nugroho, in their paper, conducted an experimental study of the effect of torrefaction on solid fuel characteristics of forest residue biomass. Cappenberg, in his paper, analyzed the effect of using diesel fuel, biodiesel, and Pertamina dex on the performance of a single-cylinder diesel motor. Syaripuddin, in his paper, did welding of 4-inch Sch pipes. 40 with a variation of the current to determine the tensile strength. Sumardiyanto and Susilowati, in their paper, discuss the effect of the condition/quality of rinse air produced by the turbocharger on the engine performance of the diesel engine driving the ship, HORTEN – SULZER Model 6RND76 above MT. New Seraya. Setyadi and Nanda, in their paper, discuss the development of fire where the development of the fire will be represented by the HRR (Heat Release Rate), burning rate, and visualization of each simulation. Sugita and Dzaky, in their paper, conducted an analysis using the Ansys Fluent 15.0 software to determine the effect of pressure distribution, velocity, and pathline velocity on the drag coefficient value. Dwiyati and Widyarma, in their paper, analyzed the results of adding carbon to the results of testing the braking variables and material characteristics on the brake linings of wood powder composite.

SUMMARY. Chandra and Prawoto, in their paper, designed a modeling hybrid vehicle with a series-parallel configuration using Matlab/Simulink software. Heriana, in her paper, examines the concept of a four-wheeled rural vehicle with a capacity of five people and more than 500 kg of goods, which is also a milestone in the change in rural transportation in Indonesia. Susetyo, in his paper, conducted a comparative analysis of ASTM A 36 welding results with DC+ and DC- polarities in terms of tensile strength with several variations of wire feeder speed. Syaripuddin, in his paper, performed OAW welding with three different types of electrodes to see the mechanical properties produced. Jaelani and Sukmara, in their paper, analyzed the steam boiler efficiency in unit 2 PLTU 2 Banten with a capacity of 300 MW. Sugita et al., in their paper, re-utilize the waste heat from the AC condenser, which is dumped into the environment so that it can reduce electricity consumption which has an impact on energy savings and reducing the effects of global warming. Cappenberg, in his paper, gave additives to determine their effect on motor performance, namely fuel consumption (FC) and engine shaft power (BHP) on the OM 444LA diesel engine. In their paper, Sukarno et al. analyzed the effect of changes in ignition timing on engine performance in the form of power, torque, and fuel consumption using a programmable ECU applied to a 115cc automatic motorcycle engine.

SUMMARY. Syaka, et al., in their paper designed a plastic cup chopper machine with a manual drive and tested its performance. This study uses the VDI 2221 method, which is a method for solving problems and optimizing the use of materials, technology, and economic conditions. Ekoprianto, in his paper, conducted an aerodynamic analysis on the body design concept of an electric-powered 4-wheeled vehicle with a capacity of 4 (four) people which has the lowest air drag (drag). Basori, et al., in their paper, analyze the performance of the water turbine at the Musi Unit 2 hydropower plant which has carried out a major overhaul, because it has been operating for 40,000 hours. Nugraha, et al., in their paper, examines theoretically, to determine the mathematical model used to predict the optimum time and mass gain. Sugita, in his paper, conducted an experimental study of the performance of a flexible heat pipe with a length of 450mm. Sukarno, in his paper, discusses the construction of a thermoelectric generator (TEG) that can convert energy from the heat of motorcycle exhaust gases into electrical energy and sees how much electrical power can be generated at variations in engine rotation speed. Harini, in her paper, designed a firefighting system (external firefighting) for firefighters. Setyadi, in his paper, analyzes the characteristics of the spread of fire when a fire occurs based on the FDS (fire dynamics simulator) method in the motorcycle parking lot of campus A, State University of Jakarta.

SUMMARY. Syaka, et al., in their paper converts a 2-stroke combustion engine into a machine with a compressed air propulsion source without any combustion process. Hakim, et al., in their paper, examines the need for safety belts for four-wheeled four-passenger vehicles for the campus environment. Wardoyo, in his paper, conducted research on the characteristics of a thermoelectric power plant through heat from a 150 cc sport exhaust with a-shaped coolant fin slots. Syafrizal, in his paper, analyzed the corrosion of low carbon steel pipe ASTM A 135 on a diesel engine at a PT. X. Kholil, et al. In their paper discusses the manufacture of a prototype bike lift with a vertical screw system with a maximum load capacity of 200 kg motorcycle. Refiadi, in his paper witnessing the CNC Turning process through documentation of raw materials, process plans, types of machines, machining processes, quality control, and running waste management processes for 16 samples of metal-based products in the form of solid shafts. Sukmara, et al., in their paper, examines a concept of a four-wheeled electric vehicle with a capacity of four people, which is also a milestone in the change toward a green Indonesia through environmentally-friendly vehicles. Sugita and Iskandar, in their paper, analyze the maximum temperature that can be achieved by using cheap, strong, and easy-to-make materials for portable solar water heaters.

SUMMARY. Wardoyo, in his paper, discusses the relationship between the power of a 5-blade propeller wind turbine and the load on the supporting tower. This study aims to find a relationship between the wind turbine's power and the turbine tower's bending moment load. Priyambodo, et al., in their paper, evaluates the performance and emission characteristics of an increase in cylinder volume in a four-stroke engine with a bore up and stroke up. Setyadi, in his paper, discusses the effect of using bioethanol as a gasoline fuel mixture 88 on a 4-stroke motorcycle engine with a composition of 10%, 20%, and 30%. Astuti, in his paper, analyzes the effectiveness of the combination of electrodialysis and ozone in treating brackish water into fresh water. Hafidz, in his paper, discusses the magnitude of the force that occurs on disc brakes for mini buggy vehicles with a calculation analysis of brake components with pedal loadings of 1kgf, 2kgf, 3kgf, 4kgf, 5kgf, 6kgf, 7kgf, 8kgf, 9kgf, and 10kgf. Hastuti, et al., in their paper, analyzed the effect of aging temperature on the transformation temperature of Ti-50,7at%Ni alloy. Sari, in her paper, conducted an initial study on the manufacture of copper powder with an amorphous structure by reacting a solution of copper (II) sulfate (CuSO₄) with zinc metal (Zn) at a relatively high temperature and agitation speed. Premono, et al., in their paper, conducted a numerical study by optimizing the location of the gate and the temperature of the mold on the defects of the outer shell helmet product.

SUMMARY. Susetyo, et al., in their paper, discusses welding using V and X bevel. The current variations used are 140, 150, 160, and 170 A with DC+ polarity. This study aimed to determine the effect of seam shape on defects and tensile strength of low carbon steel material from SMAW welding with AWS E 7018 electrodes. Dwiyati, in her paper, examines the effect of isocyanate hardener levels in polyurethane paint mixtures on the quality of plastic painting results. The variation of the hardener composition studied was between 2% - 20%. Refiadi, in his paper, discusses the manufacture of WPS and PQR API 5L Grade B for manual SMAW pipe supply according to the API-1104 standard. Kholil, et al., in their paper, discusses the effect of forced vibration oil damping on an unbalance mass system of one degree of freedom. Sukmara, in his paper, examines the concept of a four-wheeled electric vehicle with a capacity of four people, which is also a milestone for change toward a green Indonesia through environmentally-friendly vehicles. Setyadi and Wibowo, in their paper, analyzed the effect of mixing diesel oil with biodiesel on the cetane number value. The scope of this research is a literature review, sampling of diesel fuel oil (diesel oil) and biodiesel, mixing of diesel oil and biodiesel with a ratio of 30:70 and 40:60, and testing the cetane number of mixed results on the CFR F-5 engine. Sari, in her paper, analyzed the product resulting from the combination of the welding process with GTAW and heat treatment of 6061 aluminum to determine its hardness and tensile strength. Wardoyo, et al., in their paper, analyzed the effect of the vacuum fraction in a narrow pipe with a spiral inner surface on the two-phase heat transfer bubble flow pattern.

SUMMARY. Susetyo, in his paper, conducted a study on the characteristics of XYZ rust remover waste. This is done to determine the waste composition and whether it needs special handling or can be directly disposed of in nature. Susilowati, in her paper, analyzed the compressors at KM Gunung Dempo. The purpose of this research is to determine the compressor's performance by theoretically calculating the existing data, then a comparison is made with the real results in the field. Sari and Dwiyati, in their paper, examine the corrosion of H₂S and CO₂ on static equipment in the oil and gas industry. Rahmanto, in his paper, conducted an analysis of human comfort in a solar liquid desiccant cooling system using a counter flow configuration. Sukmara, in his paper, compares two piston rings, namely the original piston ring and the local piston ring on the Daihatsu S-38 car. Kholil, et al., in their paper, analyzed the vibration characteristics of the swing arm structure made of carbon steel on a motorcycle with a twin-shock type of suspension using finite elements and experimental methods. Cappenberg, in his paper, conducted a performance study of the Daihatsu Gran Max 1300 engine that uses premium and gas fuel (BBG). Basori, et al, in their paper, analyzed the deflection of flexural rods using clamps and rollers on aluminum 6063 U profile material with a distributed load to determine the strength of the material so that the material's safety limit can be known at the time of maximum loading.

SUMMARY. Premono, in his paper, implements a parallel computational process, called the Domain Decomposition Method (DDM) on the finite element method (MEH). The study taken is a simple linear elasticity problem in the form of a cantilever rod. Basori, et al., in their paper, designed a paper cutting machine with a production capacity of 10 kg/hour, including designing the shape, determining dimensions, selecting materials, and calculating the permissible forces and stresses. Yoga, et al., in their paper, compared five different CDI (capacitor discharge ignition). To determine the effect on engine power on a Yamaha Mio motorcycle. Syaripuddin, et al., in their paper, examined the welding results with liquid penetrant to determine the defects that occur in several trademarks of the E 6013 electrode. Sugita, in his paper, made a copper heat pipe with an outer diameter of 9.525 mm, 0.8 mm thick, and 300 m lon., which will be tested the ability to transfer heat at an angle of 0^o, 30^o, 45^o, 60^o, and 90^o to the horizontal direction. Sukarno, in his paper modeled the loading due to impact loads on car rims with a vibration system of two degrees of freedom. The purpose of this study is to produce a model of the loading on the car wheels due to impact loads so that the results of this study can be a reference that can be applied in stress analysis or structural analysis using finite element method software. Capenberg, in his paper, studied various fuel types on the performance of the Toyota xxx car engine. The purpose of this research is to determine the performance of engines that use premium, pertamax, and pertamax plus, as well as the ratio of levels of CO, HC, CO_2, and O₂ and determine the right fuel to use according to the emission standards set. Dwiyati, in her paper, conducted a study on sugarcane fiber waste as reinforcement in polymer composites with a polyester matrix. This study aimed to determine the value of tensile strength, stiffness, and toughness of sugarcane/polyester fiber composites and to see the effect of fiber volume fraction on mechanical properties.

SUMMARY. Basori, in his paper, analyzed the tensile strength of Bj 44 construction steel in the SMAW welding process with variations in welding current. This research aims to know the effect of current strength on tensile strength of Bj 44 construction steel in the SMAW welding process using a single V seam with E6013 electrode at DC+ polarity with currents of 100 A, 110 A, 120 A, and 130 A. Wulandari and Sriadi, in their paper, analyzed the effect of blade angle on fan performance in an axial low-speed wind tunnel. This research aims to examine the effect of blade angle on the performance of a low-speed wind tunnel axial fan using computational methods. Kholil, et al., in their paper, analyzed the effect of injecting misted water into the combustion chamber through the inlet to reduce the symptoms of knocking or detonation as well as symptoms that occur in the engine when water injection is carried out. Basori and Rudianto, in their paper, analyzed the frame construction of a pump testing tool using the CATIA V5 program. The purpose of this research is to determine the level of feasibility of the framework of the pump testing tool. Syaripuddin, et al., in their paper, analyzed the effect of the type of weld seam on the tensile strength of low alloy steel (ASTM A36) using SMAW welding. The purpose of this research was to determine the effect of the type of weld on the tensile strength of ASTM A36 Steel plate in SMAW welding using Single V and U seams with E7018 electrodes with a diameter of 3.2 mm at DC + polarity with currents of 100 A, 110 A, 120 A, and 130 A. Dwiyati and Kholil, in their paper, made briquettes using water hyacinth as raw materials and HDPE plastic waste which has a high calorific value. Apart from being alternative energy, this briquette is later expected to be an environmental solution for water hyacinth, a nuisance plant, and the problem of plastic waste that is difficult to biodegrade in nature. Rumendi and Hermawan, in their paper, analyzed the surface hardening and microstructure of AISI 1045 steel through the nitriding process using urea media. Nitridation aims to harden the steel surface to improve chemical and mechanical properties. Syaefudin, in his paper, designed a simple hydraulic-driven backhoe excavator.

SUMMARY. Kholil, in his paper, analyzed the dynamics of the structure carried out on the swing arm to know the structural characteristics of the motorcycle swing arm in a mono-shock suspension system. Setyawan and Sardjadi, in their paper, discuss the improvement of aerofoil aerodynamic performance by using a zap flap. Syaefudin and Basori, in their paper, design the alloy wheels of hybrid motorcycles and test load distribution using Autodesk Inventor software. Susetyo, et al., in their paper conducted a T-joint with the SMAW process at various currents of 90 A, 100 A, 110A, 120 A, and 130A to know the most effective current and how it affects the microstructure area and welding defects. Mahir, in his paper, measures the levels of carbon monoxide (CO) in exhaust gas produced by a 110cc 4-stroke motorcycle with a CDI ignition system with an AC source (CDI-AC) and a DC source (CDI-DC) which were tested at various engine speeds. (RPM). Triyono, in his paper, discusses the effect of austempering temperature on nodular cast iron (FCD 50) on the wear rate of tipped ceramic lathe chisels. Sirojuddin, in his paper, analyzes opportunities for business developers and challenges for engineering technology designers in Indonesia regarding mini hydro power plants (PLTM). Yoga, in his paper, analyzed a flat plate type solar collector using a heat pipe as a heat gainer in the absorber.