bluuebunny/crossref_metadata_2025_split huggingface dataset:
Design and Prototyping of Weigh-In-Motion and Overload Detection System for Freight Vehicle
Authors: Masyhur A H , Nurprasetio I P , Budiman B A , Utomo T P B 
Published: November 2019

Abstract
The high number of freight vehicles that exercised overloading in Indonesia has led to a significant reduction in the quality of road pavement. The obsolete overload detection system using weigh bridges have been ineffective, since it requires vehicles to maneuver and enter the weighing station. In the above system, after manual checking, overloaded vehicles will be penalized. The Weigh-in-Motion (WIM) device that is developed in this research utilized a bending plate sensor with strain gage. As overloaded vehicle runs over the WIM, axle weight will be automatically recorded, and the data is processed further to assess the compliance to maximum freight weight as specified for the vehicle. In this research work, the WIM prototype is developed and tested using motorcycle under normal operation and overloaded conditions at different speeds. Arduino based signal processing and analysis system has been developed such that the overload detection may be performed automatically. When the system senses an overloaded vehicle, it will automatically trigger the alarm and a camera will capture the vehicle. The error of the prototype is within acceptable range and the system has shown the potential to detect whether the vehicle, i.e., the motorcycle, is overloaded or not. As a continuation, the development of a reliable microcontroller-based WIM and a robust automatic overloaded freight vehicle will be our future work.
Review of the Topology and Energy Management Hybrid Energy Storage on Electric Vehicle
Authors: Fitri Desanti Ayuning , Uta Nugraha Yoga , Nur Yuniarto M , Wikarta Alief 
Published: November 2019

Abstract
There are several ways to improve the mileage of the electric vehicle (EV). High-efficiency drivetrain and high energy density are the main factors. Energy storage source for EV obtained from the battery, ultra-capacitor (UC) and fuel cells (FC). Each of that has own characteristics and capacity. The battery has a good energy density, UC and FC are superiors on power density. Combining some of the energy storage will improve performance and mileage. On this paper, the topology of combining energy storage are reviewed. In addition, also review the power management strategy of hybrid energy storage. By using a convenient strategy, hybrid energy storage becomes very worth.
Increasing the weight of onion bulbs due to the reduction of Spodoptera exigua using a portable light trap
Authors: Wulandari R , Santoso R E , Prasetiyo D , Lestari A , Mizar A , Puspitasari P 
Published: November 2019

Abstract
Red onion is one of the strategic horticultural commodities whose distribution is almost in all regions of Indonesia. The problem of this this commodity is the low productivity resulting from the Spodoptera exigua pest attack. Based on the problem above, the purpose of this research is to design a portable pest control lamp. This lamp will be measured its effectiveness in trapping pests. This study also aims to determine the effect of trap effectiveness on increasing the weight of onion bulbs. This study used a randomized block design with 3 treatments. The observed variables were the number of pest catches in each treatment as well as the weight of onion bulbs produced by the land that was placed in each treatment. The results showed that T3, a trap with a constant light, was the best treatment with an average yield of S. exigua catch reaching 126.75 S. exigua. The second best results were given by T2 and T1 with an average catch reaching 74.75 and 46.75. The best weight is also given by T3 with an average weight reaching 116 g. The second best results were given by T2 and T1 with an average weight of 96 g and 85 g.
Closed Drain Transfer Pump Failure Analysis using Root Cause Failure Analysis (RCFA) Method
Authors: Hidayat M F , Warjito  
Published: November 2019

Abstract
Maintenance is a process carried out to maintain the reliability of individual/group assets. Positive displacement type pumps are commonly used in closed drainage systems as transfer pumps in oil and gas processing plants. However, there are times when the pump fails which requires further effort to prevent the failure from recurring. Efforts that can be made to overcome this are using the method of Analysis of the Root Failure (Root Cause Failure Analysis). The RCFA method uses recollection of evidence related to design, procurement, and operation of a tool to find root causes and latent causes of problems. As a result of gaps found between the design process, procurement which leads to the root cause of pump failure, this study recommends pump-operating companies to pay more attention to piping installation to support pump performance and coordination between owner, design, and procurement to prevent this failure from recurring.
Numerical Simulation of a Small-Scale Cyclone Separator using MP-PIC Method
Authors: Wargadalam V J , Andira M A , Putra C A , Siswantara A I , Gunadi G G R , Hariyotejo  , Damis C , Aminuddin  
Published: November 2019

Abstract
This paper presents a numerical study of a small-scale cyclone separator performance by means of computational fluid dynamics (CFD). The family of Euler-Lagrange approach named multiphase particle-in-cell (MP-PIC) is employed for modelling gas-solid interaction. The three-dimensional small-scale cyclone separator geometry was discretized with hexahedral-dominant mesh. The gas phase is assumed to be a flue gas which density is 0.363 kg/m3 and dynamic viscosity is 7.47E-5 Pa s. The solid particles are catalyst used in a small-scale fluid catalytic cracking (FCC) unit which are having 2400 kg/m3 of density and diameters vary from 90 µm to 130 µm. Large Eddy Simulation (LES) turbulence model was used to accurately predict turbulent flow behaviour of flue gas inside the cyclone. The simulation was performed for 7.82 m/s inlet velocity for both flue gas and catalyst. The pressure drop and catalyst collection efficiency were the variables of interest to be analysed, which were compared to the analytical solutions. It was found that the results generated from numerical simulation using MP-PIC method reflect a good agreement with the analytical solutions.
Optimization of Nozzle Number, Nozzle Diameter and Number of Bucket of Pelton Turbine using Computational Fluid Dynamics and Taguchi Methods
Authors: Leman O Y , Wulandari R , Bintara R D 
Published: November 2019

Abstract
Along with the depletion of fossil fuel reserves in Indonesia, water resources can be used as an alternative source of energy. Pelton turbines are one type of water turbine that can be used. However, Pelton turbines still have weaknesses in terms of determining the optimal number of buckets and nozzles. This study aims to optimize the experimental variations in the number of buckets (Nb
), the diameter of the nozzle (Dj
), and the number of nozzles (Nj
) on the efficiency of the Pelton Turbine. The number of buckets was varied namely 24 and 27 pieces, nozzle diameter 5.5 mm and 7 mm, and number of nozzles using a single nozzle and double nozzle with horizontal direction. The research design began with Design of Experiment (DoE) using Taguchi method in Minitab 18.0. The next step was to calculate and then designed turbine using Autodesk Inventor 2016. The turbine design was then simulated using ANSYS Fluent 17.0 Workbench. The calculation of the largest efficiency using the number of 27 buckets double nozzle 5.5 mm producing an efficiency of 64, 69%. Based on Taguchi optimization delta result, the most influential variable on the efficiency was the nozzle diameter (M=0.1943).
Comparison of Jet Diffusion Flame Characteristics and Flame Temperature of Dimethyl Ether (DME) and Liquefied Petroleum Gas (LPG)
Authors: Anggarani R , Wibowo C S , Maymuchar  , Dhiputra I M K 
Published: November 2019

AbstractDimethyl Ether (DME) is currently considered as alternative to be used as energy source. Its similar physical properties with LPG made it possible to be used in household gas stove using same apparatus. Concern comes on its combustion properties regarding its lower calorific value than LPG. This research aimed to investigate the jet diffusion flame characteristics of DME compare to LPG in terms of flame height and lift-off flame, with correlation being made with fuel flow rate and burner hole diameter. The flame temperature is also measured on the same experiments. The results show that DME produce lower flame height than LPG. The flame height produced by both fuels were independent to burner hole diameter. The transitional regime in term of Reynold number is differ significantly between DME and LPG where DME reach the transitional regime at lowerRe. The flame temperature of DME at nozzle tip and dark zone is higher than LPG.
The Effect of Biogas Pressure in the Performance and Emission of Spark Ignition Engine
Authors: Suyitno  , Ridwan  , Arifin Z. , Pranolo S H 
Published: November 2019

Abstract
Biogas is a renewable energy which can be used for fuel in the internal combustion engine and produce electricity by using a generator. On a small scale, electricity generation from biogas is important and attractive for special purposes especially for the areas which are not connected to the main electricity network or which are plenty of sources of biomass waste. Therefore, the purpose of this study is to investigate the performance and emissions of the internal combustion engine using the biogas fuel. The study was conducted by a simulation using ASPEN HYSYS and by experiment. The biogas pressure was varied from 0 to 4 barg. The results show that the highest power and efficiency were obtained at 700 W and 14.2%, respectively. The use of pressurized biogas can increase efficiency by 1%. Low CO and HC emissions and high CO2 emissions indicate that combustion occurs completely.
Ergonomics in Mining: Participatory Approach in Indonesian Tin Mining
Authors: Priyoko Prayitnoadi R , Lawson Glyn , Ryan Brendan , Hermawati Setia 
Published: November 2019

Abstract
This paper presents the investigation of the acceptability and suitability of Participatory Ergonomics (PE) interventions within tin mining companies. The study was conducted by scenario-based-design (SBD) method and questionnaire with participants from small medium enterprises (SMEs) tin companies. Five companies and fifteen participants were involved in this study. The acceptance of participatory ergonomics through SBD study revealed positive in Indonesian tin mining companies The study shows that support from occupational safety and health (OSH) authorities are needed in order to strengthen workers’ knowledge in ergonomics and good safety practices and to allow them to implement ergonomics through training and the participatory approach. The results of this study may contribute towards the implementation of PE. As a consequence of improved implementation, tin mining accidents may be reduced.
Modification of coolant fluid controller for minimum quantity lubrication (mql) methods with use of arduino uno-based control system
Authors: Amin Zulkifli , Eru Putra Meiki , Hari Mulyadi Ismet , Desfiandra Ardi 
Published: November 2019

Abstract
Coolant is important in the machining process. Excessive and uncontrolled use of coolant can cause high production costs, affect the human health and the waste of coolant polluting the environment. One method that has been used to reduce the amount of coolant is the limiting coolant distribution method or commonly called MQL (Minimum Quantity Lubrication). The MQL equipment which is available in the market has a relatively expensive, so a prototype of a coolant control system of MQL method has been designed and made. However, the prototype made not meet the desired specifications then a modified control system is added to the prototype. Prototype performance is compared before and after the control system being added. The duration of fluid drop and the output capacity of the fluid sprayed are measured to test the function of the device. It is found that with the addition of modified control systems, the performance of MQL cooling regulator is improved, but it is applied mostly for fluids which have viscosity ranging about viscosity of oil and cooking oil. For cooking oil fluid, the MQL tool performance increase as the capacity of the fluid decreases due to the control system being applied at all case of air valve openings for the diameter orifice of 2 mm. It is also found that at the aperture of the air valve of ¼, with a 10 second delay time and an orifice diameter of 2 mm, the capacity coolant sprayed is reduced from 107.348 ml/hr to 89.609 ml/hr when the modified control system is added. For the Bromus fluid, the capacity of the fluid decreases as the control system being applied. The MQL tool performance increase only occur in the smallest valve opening of ¼ that is about 9 to 26%. However, the capacity of Bromus types of fluid increase as the air valve openings increase.
The Effect of Speed and Distance on the Achievement of Austenitization Temperature in Low carbon Steel with Thickness Variations on the Flame Hardening Process
Authors: Iskandar N , Sulardjaka  , Munadi  , Hanasta R Y , Fitriyana D F , Dzulfikar M 
Published: November 2019

Abstract
Austenite temperature must be achieved in the surface hardening process. In the process of surface hardening by the method of flame hardening, failure is often encountered, for example, such as increasing the value of hardness that is not optimal, and the value of hardness that is less uniform The type of fire used, the distance of fire to the specimen, the speed of fire and the level of thickness of the material are factors that are very influential in the process of flame hardening. The purpose of this study is to measure and observe the profile or rate of the trend of increase and decrease in temperature in the flame hardening process in low carbon steel material. The experiment method that is carried out is by giving the variation of the rate. The measurement process uses several thermocouples mounted on the specimen and connected to a computer for the process of data recording and process monitoring. The conclusion of this study is the greater the value of the thickness of low carbon steel material that is processed by flame hardening, so to reach the temperature of austenitization by the method of flame hardening the speed of fire must be slowed. An improper combination between the distance of fire and specimens and the speed of fire can cause austenite temperature not to be reached. The heat reduction rate takes place more slowly than the rate of increase in heat the speed of fire and distance of fire to low carbon steel which has varying levels of thickness.
The effect of groove welding on mechanical properties and microstructure of wear resistance steel plate by Submerged Arc Welding
Authors: Mansjur Zuldesmi , Sumual Hendro M , Tamba I P 
Published: November 2019

Abstract
Aim of this research is to analyze the mechanical properties and microstructure of wear resistance steel plates joined by Submerged Arc Welding at different grooves welding. The welding current of 300 Ampere, voltage of 28 Volt and travel speed of 38 cm/min was applied. The microscopical examination methods were used for weld zones. Impact toughness and rockwell hardness test were obtained from the weld metal, heat affected zone and the base metal samples. The fracture surfaces were examined by using optical microscope. As results, there was no difference of hardness and microstructure among three grooves welding. The significant differences were detected at the weld zones. Base metal had the highest hardness value. Ferrite and pearlite phases were obtained at three weld zones, but the heat affected zone had coarser grain structure than the base metal. Weld metal volume and electrode length significantly affected the impact toughness of joint, where the larger of the weld metal volume and length of electrode fill in the groove welding, the higher of impact toughness. The lowest impact energy and toughness value were attained at V groove and the highest was at I groove. The fracture surfaces at all groove welds showed ductile fracture dominantly.
In-Service Welding Simulation of 28” Pipeline Using Finite Element Method
Authors: Tambunan Sahrudin , Yatim Ardiyansyah , Wira Sanjaya Putu , Michael Simon P H 
Published: November 2019

Abstract
To maintain the integrity of the gas pipeline, the repairing of pipeline system with common method such as cut and replaces method by conducting hot tap and bypass or clamp method is conducted. Both methods require in-service welding in the process. During in-service welding, the process affects the structure strength. The structure then needs to be analysed during the welding process. There are two common problems associated with in-service welding. Firstly, the high gas flow in pipe causes the weld rapidly to cool due to the convective transfer of heat. The other problem is burn-through during in-service welding. Pressurized natural gas imposes a significant stress on the pipe wall, and since the pipe strength is decreased during welding, this cause failure in pipe wall. Burn-through occurs when the region around the weld pool has insufficient strength to withstand the internal gas pressure. This paper shows the finite element analysis procedure of In-Service Welding Analysis to avoid burn-through failure. A thermal-mechanical based Finite Element model had been conducted to assess the risk. The model is simulated using three-dimension (3D) mechanical, thermos-elastic-plastic-metallurgical finite element computational procedure. The temperature, stress and strain parameters of inner surface were used to assess the model. The temperature and strain check are below the allowable value while the stress check with some applicable method which are based on either stress or strain based.
The Effect of Quench Delay on Structure and Corrosion Properties of Aluminum Lithium Alloy 2091
Authors: Ruth Fransisca Claudya , Soegijono Bambang 
Published: November 2019

Abstract
The aerospace industry is always trying to improve aircraft performance and reduce aircraft weight. Therefore aluminum lithium alloys are targeted as advanced materials for aerospace technology because of their low density, good corrosion resistance, high toughness and lightweight. This 2091 alloy is an aluminum-lithium alloy which has a composition 2.1 wt% Cu, 2.0 wt% Li dan 0.1 wt% Zr. This alloy has been subjected to quench delay heat treatment to enhance corrosion resistance. The experiments were carried out to determine the relationship between delay quenching and its corrosion properties. Aluminum-lithium 2091 had solutionized at 525°C for 6 hours and then has been quenched in water with a variation of delay quenching (30 second, 60 second, 90 second). Characterization using x-ray diffraction were used to investigate the phase of each sample. The results show different diffraction patterns from one sample to another due to delay quenching. While electrochemical testing using a 3.5% NaCl solution show different corrosion resistance due different quench delay.
Water absorption and tensile properties of the hybrid of fly ash-CaCO3/epoxy composites
Authors: Setyawan P D , Martadinata W , Sugiman S , Salman S , Catur A D , Zainuri A 
Published: November 2019

Abstract
The paper presents water absorption and its effect on the tensile properties of hybrid of fly ash-CaCO3-filled epoxy. The total filler content was 20wt%, with the fly ash to CaCO3 ratios were 20/0, 15/5, 10/10, 5/15 and 0/20. Adding fillers into epoxy decreased the water uptake in the ranges of 15 - 22%, where the lowest and the highest water uptake of the hybrid systems belonged to the fly ash/CaCO3 ratios of 15/5 and 20/0, respectively. The tensile strength and elastic modulus continued to decrease with aging time for all epoxy systems. At the saturation level, the tensile strength and elastic modulus of filled epoxies were improved compared to the unfilled epoxy, except for the hybrid of fly ash/CaCO3 of 15/5. The fracture strain as well as the tensile toughness were considerably increased at the equilibrium. A scanning electron microscopy revealed that in dry condition the fly ash was well bonded with the matrix, but not for the CaCO3 particles. In the semi equilibrium and equilibrium states, the fly ash and CaCO3 were mostly detached from the epoxy. The hybrid of fly ash/CaCO3 of 15/5 was not recommended as it decreased the tensile properties more than the other hybrid compositions.
Comparative study on stress analysis in human molar tooth between metallic and nonmetallic dental filling material
Authors: Soliheen M A M , Kadir A Z A , Kurniawan D , Nor F M 
Published: November 2019

Abstract
Dental filling is regarded as proven dental restoration method in dealing with partial missing of tooth crown due to caries or trauma. This study analyses the reliability and durability of materials for dental filling using finite element analysis. Specifically, it determines the stress induced at a dental filling due to occlusal load. Two filling depths were simulated: (a) filling depth in enamel and (b) filling depth in enamel/dentine on top of molar tooth. Dental filling made of glass ionomer cement (GIC), composite, and amalgam (as a reference material) which represented metallic and non-metallic filling materials were chosen as the materials for this study. A 100 MPa pressure was applied on the dental filling to represent an occlusal load. The results obtained were the stress (magnitude and distribution) for enamel/amalgam, enamel/GIC, enamel/composite, enamel/dentine/amalgam, enamel/dentine/GIC, and enamel/dentine/composite. It was found that the maximum induced stress was higher for enamel/dentine depth while there is no significant difference in stress magnitude for all dental filling materials.
Fe2O3/MWCNTs modified microdialysis electrode for dopamine detection
Authors: Sato Nicha , Haruta Makito , Ohta Yasumi , Sasagawa Kiyotaka , Ohta Jun , Pewnim Naray , Jongprateep Oratai 
Published: November 2019

Abstract
Dopamine (DA) is an essential neurotransmitter which plays important roles in human’s biological and cognitive processes, specifically learning, memory, emotions, and movements. Abnormality of dopamine level can signal the trace of neurological diseases. Dopamine detection, therefore, can be useful in detection of symptoms and diseases related to brain disorders such as Parkinson’s and depression. This study aimed at examining usage of hematite iron oxide (Fe2O3) as electrochemical sensors for dopamine detection. Nanoparticulate Fe2O3 was synthesized, microstructurally examined, and tested for its electrocatalytic activities. The synthesized powder showed a single phase with an average particle size of 93.9 nm. Electrocatalytic activities of the powder, measured in dopamine hydrochloride solutions with concentrations ranging from 0.1 to 10 μM, were evaluated by cyclic voltammetry technique. At applied voltage of 0.33 V, peak currents corresponding to oxidation reactions between dopamine and Fe2O3 electrode were detected. With sensitivity of Fe2O3 electrode in the range between 0.021 and 0.033 μA μM−1, the Fe2O3 nanoparticles exhibited fair sensing ability.
Human behaviour, mind, and culture
Authors: Okasha Samir 
Published: November 2019

Abstract
‘Human behaviour, mind, and culture’ examines the implications of biology for humans, asking whether human behaviour and culture can be explained in biological terms. The intelligence, language use, cultural inventions, technological prowess, and social institutions of our own species, Homo sapiens, seem to set us apart from other species. Can biology shed any light on humanity and its achievements? One way to tackle this question is to ask whether human behaviour can be understood in biological terms. The nature vs nurture debate is discussed, followed by the approaches of sociobiology and evolutionary psychology to the study of human behaviour. Finally, cultural evolution—or dual inheritance theory—is considered and how this relates to biological evolution.