bluuebunny/crossref_metadata_2025_split huggingface dataset:
Hemicellulose and hexenuronic acid removal selectivity to give boosting effect to ECF bleaching
Authors: Trismawati  , Nanlohy Hendry Y. , Zainal A , Wikanaji D. , Setiyo Muji 
Published: March 2021

AbstractVaries wood structure need difference way of treatment to get the appropriate quality of wood pulp. In pulp industry, wood chips should be cooked and bleached in order to have a good quality of pulp suitable for paper industry. A modified pulp cooking such as Continuous Isothermal Cooking and Super Batch Cooking followed by ECF bleaching is a good alternative for the achievement the necessary standard quality. Effort to achieve better quality in higher yield has so many times been done. Enzyme treatment using xylanase using Ecopuylp TX-200 is a good alternative that could be done in the ECF bleaching stage. Two kinds of unbleached wood pulp from Eucalyptus camaldulensis from AA Thailand, Acacia mangium from RAPP Indonesia is used in this experiment. The bleaching results are analysed for yield, viscosity, hexenuronic acid content, and brightness. The results give an indication that wood structure has a close correlation with the accessibility of enzyme and chemistries in giving peeling effect of lignin from lignin carbohydrate complex (LCC) to get high brightness of pulp with minimum fibre losses. The presence of Na2CO3in the cooking liquor to gather with the xylanase has positive effect in the cleavage of hemicellulose and lignin through hydrogen bond at – OCH3.
Gas-solid two phase flow simulation in rectangular riser
Authors: Suryo Is Bunyamin , Yuwono Tri Yogi , Schnell Uwe 
Published: March 2021

Abstract
The numerical studies of gas-solid two phase flow in a rectangular riser are carried out and evaluated. Eulerian-Eulerian approach using kinetic theory of granular flow is utilised in the simulation. Syamlal et al. drag model is utilised to calculate the energy exchange between gas and solid phase. Radial distribution model of Syamlal et al. and the restitution coefficient of 0.7 are used to predict the hydrodynamics flow in the riser. The simulation is carried out from 0 s to 40 s using time steps of 0.00015 s and on a single computer. The comparisons of numerical results with experimental data are made using lateral profiles of the solid phase velocity and the gas volume fraction. The simulation result overestimates the experimental value due to the coarse nature of the grid and probably due to uncertainties of the inlet flow properties.
Evaluation of ohmic heating for sterilization of berry-like fruit juice of mulberry (Morus nigra), bignay (Antidesma bunius), and jambolana (Syzygium cumini)
Authors: Hardinasinta Gemala , Salengke S. , Mursalim  , Muhidong Junaedi 
Published: March 2021

Abstract
Increasing awareness on healthy lifestyles escalated the demand for health beneficial products which lead to the creation of minimally processed products using novel technologies. Ohmic heating considered as an emerging sterilization technology which adopt the principle of High-Temperature Short Time (HTST) in thermal sterilization technology. Among the indigenous species of berry-like fruit grown in Indonesia are mulberry (Morus nigra), bignay (Antidesma bunius), and jambolana (Syzygium cumini). This berry-like fruits possess great potential as raw materials for juice industries. In order to evaluate the applicability of ohmic technology for sterilization of juice and purees from these fruits, a stationary ohmic heating system has been built and tested on these three types of fruit juice. The electrical conductivities, heating rates, and system performance coefficients were measured. This study found that the electrical conductivities of all these fruit juices were ranging from 0.128 to 0.430 S.m−1 which increased linearly with temperature. The heating rates were 0.57-0.66 °C/s and the SPC values were ranging from 0.64 - 0.81. This study concluded that ohmic heating is suitable for sterilization of these three types of fruit juices as it could provide a short heating time and a high coefficient of performance. However, the designed ohmic heating system seems to suit better for jambolana juice than for mulberry and bignay juice.
Heat balance simulation for evaluating a 315 MW low rank coal-fired power plant performance
Authors: Suryo Is Bunyamin , Saputra Ari Kurniawan , Widodo Wawan Aries , Ikhwan Nur , Maskur Zainal 
Published: March 2021

Abstract
The domination of coal-fired power plant as power generation due to its feasibility to ensure a stable supply of electricity to customer. Unfortunately, the use of coal as power plant fuel faces an issue of air pollution. Some efforts have been proposed to make the operated coal-fired power plant meeting the environmental regulations. One of the most potential ways to solve the problem is by improving the coal-fired power plant efficiency and then equate to a greenhouse gas reduction. Thus, heat balance simulation of coal-fired power plant which operates in different conditions have to be studied in order to analyse the power plant performance. In this paper, the heat balance of a 315 MW low rank coal-fired power plant is simulated by Cycle-Tempo. The simulations are carried out for several different operation conditions of the power plant. The Heat Rate will increase of 3.66% when all HPH are on off-duty while it increases by 2.63% when all LPH are on off-duty. Furthermore, the increasing of Superheater temperature of 5 °C will decrease the Heat Rate of 0.59% and it will decrease of 0.39% when the temperature of Reheater increases of 5 °C.
Induction stoves: An option for clean and efficient cooking in Indonesia
Authors: Tiandho Yuant , Indriawati Anisa , Putri Aning K. , Afriani Fitri 
Published: March 2021

Abstract
Energy sustainability and carbon emission reduction programs are widespread issues in various countries. One sector of concern in the program is the household sector with cooking activities as its focus. Therefore the cooking fuel conversion program is often carried out in various countries and even in Indonesia, such as the program of conversion of kerosene to LPG. In this article, we review the options for using induction stoves for Indonesian society. The method for our review is based on the comparison of articles in previous studies. In various experiments, it has been stated that induction stoves have better energy efficiency than electric filament stoves and LPG stoves. As a result, the operational costs of induction stoves are lower than those of the two stoves. Also, the carbon emissions of induction stoves are lower than LPG stoves. However, several challenges must be resolved if the policy about the conversion of LPG stoves to induction stoves will be implemented in Indonesia.
Characterization of fuel oil from pyrolysis waste light density polyethylene (LDPE) and polypropylene (PP)
Authors: Setiawan Adhi , Setiani Vivin , Mazdhatina Okta Salsha 
Published: March 2021

Abstract
Plastic is the biggest commonly used materials in daily life. The increased of use plastics in daily life like due to their light weight, good durability, corrosion resistance, and is quite economical. However, plastic is stable and difficult to degrade so it can cause pollution to soil and also water ecosystems. Plastic waste for many years has been one of the main causes of flooding in several cities in Indonesia. Pyrolysis is one of environmentally friendly technologies that can be a solution to the plastic waste problem. Pyrolysis can convert plastic waste into liquid fuel by thermal degradation. This research aims to synthesize liquid materials from LDPE and PP plastic waste using pyrolysis and study the effect of variations in plastic types. Pyrolysis temperature used is 325 °C in 4 hours. The fuels obtained were analysed in nature including density, viscosity, flash point. Fuel content was analysed using GC-MS devices. The result of research was highest viscosity (0.61 cSt) and density (820K kg m−3) found at 100% PP plastic waste pyrolisis. 100% LDPE composition produced liquid oil with the highest yield on a value of 26.23% and the highest gas yield obtained at 75% LDPE composition and 25% PP (64.44%). Pyrolysis of plastic LDPE and PP produced cyclohexanedione compounds (C9H14O2) with a fairly low percentage.
Optimization of controller frequency in wind-turbine based on hybrid PSO-ANFIS
Authors: Ali Machrus , Budiman  , Sujatmika Arif Rahman , Firdaus Aji Akbar 
Published: March 2021

Abstract
The variable speed wind turbine field has grown rapidly in recent years. If the low wind speed was below the average value, the speed controller must be able to adjust the rotor speed to maintain the speed in order to provide maximum power coefficient, turbine efficiency will increase. The Pitch angle control was one way to adjust the aerodynamic torque in the wind turbine so that the wind turbine power output is constant. In this paper, methods without control, PID, PID-PSO, and PID-PSO-ANFIS controls are compared for pitch angle control. The research results showed that the lowest average active power and unstable active power in the uncontrolled model was 0.3305 Watt with a frequency of 10 m−1 s−1, and the largest was the PID-PSO-ANFIS model with an active power of 2.282 Watt with a frequency of 180 m−1 s−1. PID-PSO-ANFIS model is the best model in this study and can be proposed to be applied to higher systems.
The effect of palm biodiesel composition on the physical properties of Calophylluminophyllum-palm biodiesel mixture
Authors: Wahyudi Wahyudi , Nadjib Muhammad , Novela Mila C , Aprilia Ornelia D 
Published: March 2021

Abstract
The increasing energy consumption and depletion of fossil fuels require the need for alternative source of fuels. Biodiesel is an alternative fuel developed and can replace or reduce the use of petroleum diesel. One of its development processes is to change fatty acid composition through the mixing of different raw materials namely
Calophylluminophyllum
and palm oil.
Calophylluminophyllum
oil is a non-edible raw, while palm oil is an edible raw materialwhich is abundantly produced. The research was carried out by processing palm and
Calophylluminophyllum
oil into biodiesel using transesterification. Furthermore, both kinds of biodiesel were mixed with 11 variations of the composition. The results showed that mixing biodiesel
Calophylluminophyllum
and palm oil produced positive results with decreased viscosity and increased calorific value.
Effect of activated carbon catalyst on the cracking of biomass molecules into light hydrocarbons in biomass pyrolysis
Authors: Suprianto Teguh , Winarto  , Wijayanti Widya , Wardana ING 
Published: March 2021

Abstract
Syngas which is rich in methane and hydrogen gas can be produced through the biomass pyrolysis process. This study uses an activated carbon (AC) catalyst in the pyrolysis process using a fixed bed reactor. The result showed that using AC reduces the temperature of methane production from 395 °C to 380 °C and increases CH4 production from 202.800 ppm to 223.500 ppm. The increase in the production and decrease in temperature of light hydrocarbon formation occurs due to the influence of properties of the aromatic ring on the activated carbon surface. The presence of aromatic rings causes electrostatic forces so that influences atomic bond in structure biomass molecule. From simulations that have been carried out using Avogadro Software, it shows that the length of C-C bonds increases and this means the bonds become weaker. This condition triggers the accelerating process of cracking hydrocarbon molecules and produces lighter hydrocarbon gas.
The effect of the variation of glass thickness and angle tilt on the performance of the double cover solar water collector
Authors: Ramadhan Muhammad Nizar , Subagyo Rachmat , Sa’dillah Muhammad Haris , Nugraha Andy 
Published: March 2021

Abstract
The energy crisis occurs because of the high level of dependence on fossil energy sources. The solution to overcome this problem is by utilizing alternative energy. One of the uses of solar energy is the use of solar collectors to heat water. The purpose of this study was to determine the performance of the solar water heater collector. This study used a double cover collector, with variations in glass thickness of 3 mm and 5 mm and a tilt angle of 20° and 30°. The study was conducted from 10:00 Banjarmasin Time to 16:00 Banjarmasin time. In this study, the best results were produced by solar collectors with a variation of glass thickness of 5 mm and an angle of 30°obtained average energy of 129.3 Watt and average efficiency of 48.1% at an average intensity of solar radiation of 497.6 W m−2. The performance results of 5 mm thickness glass are better than 3 mm thickness glass. In this study, glass with a thickness of 5 mm is more optimal for transmitting received solar radiation and isolating the heat coming out of the collector into the environment.
Characteristics of ZnO nanofiber in double Layer (TiO2 / ZnO) DSSC results of direct deposition electrospinning manufacturing: Variation of tip to collector distance
Authors: Arifin Zainal , Hadi Syamsul , Suyitno  , Prasetyo Singgih Dwi 
Published: March 2021

Abstract
Solar energy is obtained from sunlight. Solar cells are harvesters of solar energy that are converted into electrical energy through the photovoltaic process. One of solar cell types are Dye-sensitized solar cells (DSSC) based on double layer photoanode which is very attractive to researchers because of its high performance, cheaper, and availability of mass production. The two-layer TiO2-ZnO semiconductor obtained with the nanofiber ZnO semiconductor was deposited directly with the TiO2 nanoparticle semiconductor. The addition of the nanofiber ZnO semiconductor layer is known to reduce the semiconductor band gap value.This present study is to determine the effect of direct deposition of the ZnO layer using electrospinning with variation of the tip distance of the collector. The results showed that the use of ZnO nanofiber layers made by direct deposition on the tip distance is 7 cm to the collector, which produced a small diameter size and uniform morphology. Small and uniform morphology allows DSSC to have better electron excitation. This is directly proportional to the high efficiency of DSSC double layer.
Controlling droplet behaviour and quality of DoD inkjet printer by designing actuation waveform for multi-drop method
Authors: Oktavianty Oke , Ishii Yoshie , Haruyama Shigeyuki , Kyoutani Tadayuki , Darmawan Zefry , Swara Suluh Elman 
Published: March 2021

Abstract
There are two techniques that can be used to improve the print quality of an inkjet printer, namely binary and greyscale techniques. In the greyscale technique, the method used is the multi drop ejection method. In the multidrop ejection method, it is more difficult to control droplet behaviour because the possibility of residual vibration and crosstalk will be higher, which can cause satellites and ligaments that can make poor print quality. In this study, we reveal how to control droplet behaviour in a multidrop ejection method so that it can produce good quality droplets. The comparison of droplet image that generated from basic waveform with the waveform using preliminary and suppressing vibration, without and with adjustments of actuation voltage was also studied.
Automating CAD for creating assembly structure from Bill of Materials
Authors: Sutisna Nanang Ali , Setyanto Nasir Widha 
Published: March 2021

Abstract
This paper presents the development of an add-on for CAD system generating assembly structure automatically based on a given Bill of Materials (BOM). The BOM in Excel format is scanned by the system and the system arrange 3D CAD files into assembly at in CATIA V5 CAD system automatically. This program has been tested and succeeded well at compiling 3D assembly based on 3D part file data that is available or not available. If the 3D file is not available then the 3D assembly is still generated according to the assembly structure listed on Excel file but its 3D representation does not appear.
Optimization of fused deposition modeling parameters for hips flexural strength with Taguchi method
Authors: Tanoto Yopi Yusuf , Anggono Juliana , Fefe  
Published: March 2021

Abstract
HIPS (High Impact Polystyrene) is one of the materials used in 3D printing. Research and application of the use of this material have not been done much, especially in the applications that require flexural strength. This study aims to find a combination of FDM (Fused Deposition Modelling) process parameter settings, that produce experiments with the highest flexural strength, with the optimization process using the experimental design of the Taguchi method with FDM parameters namely the orientation position of the specimen, fill pattern, fill density, and layer. The results showed the confirmation experiment produced the highest flexural strength (32.6753 MPa). In the experiment before confirmation, the highest flexural strength (31,3768 MPa) was shown in experiment number 5 (3rd orientation position, fill pattern lattice, 75% fill density, and 0.125 mm layer thickness).
Analysis of coolant temperature and injection time effect on the product quality in injection moulding using the Finite Element Method (FEM)
Authors: Achmaed Pratama Revangga Anjar , Aminnudin  , Aji Pradana Yanuar Rohmat , Afifah Nurul 
Published: March 2021

Abstract
The purpose of this research is to analyze the effect of cooling temperature and injection time on the injection molding machine to product quality using the finite element method. The first step in this research a designing cavity molding and plastic product with AUTODESK INVENTOR 2019 PROFESSIONAL software. The next step is found the average temperature in molding use the ANSYS software. The results are then used for the process of analyzing the quality of plastic products. The next stage is the process of analyzing the quality of plastic products using AUTODESK MOLDFLOWADVISER R2 2017. The plastic product analyzed is a product called plug-ib, the product used in eye drops that are obtained from plastic manufacturing companies, namely PT. Berlina Tbk. The results obtained by a cooling temperature of 24 °C with an injection time of 1.4 seconds obtained the quality of the best product with a percentage of product quality of 79% and a product weight of 0.415 grams.
Spring back analysis of pipe coil manufacturing using conventional lathe machine
Authors: Subarkah Rahmat , Heryana Ghany , Kristian  , Sholeh Moh , Zainuri Fuad , Widiawaty Candra Damis 
Published: March 2021

Abstract
The demand for manufacturing to support the food industry, medical industry, infrastructure, energy, and transportation are soaring. Meanwhile, the capacity and capability of conventional lathe machines need to be improved, especially to the manufacturing capability of particular parts. This issue needs to be considered since lots of small manufacturing industries which have conventional lathe machine need to compete to overcome the production demand of unique parts, for example as pipe coil. In large companies, coil manufacturing is produced with a special machine. With this concept, coil manufacturing can also be made in a lathe machine. What needs to be researched is how the good product achieved. In this case, are related to the dimensions laterally and axially, because there is a spring back character on the workpiece to produce. This study analysis the spring-back of the pipe coil in which manufactured using conventional lathe machine. From this research and testing, it was found that the lathe machine can be used to make coils with pipe raw materials. It was also found that there was a size deviation in the diameter and pitch of the coil. The size deviation can be used as a coefficient to compensate for the size of the mandrel and pitch.
The study of surface roughness and material removal rate using electrical discharge machining on copper-electroplated aluminium under discharge current and pulse-on time variation
Authors: Aji Pradana Yanuar Rohmat , Setio Miharjo Muhammad Aji , Andoko  , Wahono  
Published: March 2021

Abstract
This paper presents the effect of conductivity and cutting parameters in electrical discharge machining using material Cu-electroplated Al. Among the machining characteristics determined, the material removal rate (MRR) and surface roughness (SR) have been investigated under the influence of two electrical process parameters; namely discharge current and pulse-on time. The results of the study showed that the higher the value of discharge current and pulse-on time enhance both of the MRR and SR These results were then studied more detail by SEM observation showing the surface morphology of the object after cutting. The MRR results comparison between Cu-electroplated Al and untreated Al specimen proved that the conductivity affects the MRR results, where in general, both of MRR and SR were increased by using Cu-electroplated Al workpiece.
Proposed maintenance policy using reliability centered maintenance (RCM) method with FMECA analysis: A case study of automotive industry
Authors: Dzulyadain Harits , Budiasih Endang , Dwi Atmaji Fransiskus Tatas 
Published: March 2021

Abstract
PT XYZ is one of the companies engaged in the automotive industry, especially in the motorcycle industry that produces spare parts on motorcycles. One component made by PT XYZ is Guide Comp Level K1AA. The problem in the company is one of the machines to produce the Guide Comp Level K1AA component, which is a Press machine that has a high frequency of failure. The Press machine itself consists of electrical and mechanical systems that each system consists of sequential subsystems as many as 6 subsystems and 10 subsystems. By using risk matrix, obtained two critical subsystems namely brake and trigger. Then the analysis of failure mode, effects and criticality analysis (FMECA) was carried out with output in the form of risk priority number (RPN), obtained that the selected critical subsystem is the brake. Using the reliability centered maintenance (RCM) method, then obtained the maintenance policy for the brake critical subsystem are 2 scheduled on condition task with interval time is 2.55 months and 2 scheduled restoration task with 5,394 months. The proposed maintenance policy also decreases the total maintenance cost for the critical subsystem brake up to 25% from existing maintenance costs.
Measurement and analysis of productivity in the process of raw material shearing sheet by using matrix objective
Authors: Sayuti Muhamad , Pratiwi Annisa Indah , Neni Triana N. 
Published: March 2021

Abstract
One improvement that can be done is to increase the productivity of the company. Important productivity measurement and analysis was conducted to determine the level of efficiency and effectiveness of resource use. These measurements were done on the Raw Materials Inventory at Raw Materials Shearing process. By measuring the productivity of companies can see achievements that have been achieved and as a basis for planning and improvement of section Raw Materials Inventory. Productivity measurement is done using methods Objective Matrix (OMAX) and Cause and Effect Analysis. January to December 2019 fluctuated productivity. The increase in productivity index in the period from February, April, June, September, and November 2018. While the decline in productivity index occurred in January, March, May, July, August, October, and December 2019. Increased productivity is the highest in the period of November 2019, by performance indicator value of 1.49 and the lowest productivity decline in the period of August 2019, with a value of 0.60. And performance indicator criteria that need to be improved to achieve better productivity is the criteria one, three and four, the criteria Raw material shearing, shearing time, and the result of shearing.