bluuebunny/crossref_metadata_2025_split huggingface dataset:
The development of five - level trays type biodryer reactor for processing of organic waste and vinasse mixture into solid recovered fuel
Authors: Naryono E , Susanto S , Wulan D R , Alqavid A , Nasukha I , Auliya T I N 
Published: February 2021

AbstractAt Malang city, municipal solid waste (MSW) composition is mostly an organic waste that can utilize for Solid Recovered Fuel (SRF). Vinasse is a side product of the bioethanol industry, that mixed with MSW and dried by biodrying technique for solid fuel. The purpose of this research is to evaluate SRF characteristics of organic waste and vinasse mixture generate from biodrying. Research performed by drying the mixture of organic waste and vinasse at (0, 10, 20, 30, 40%) b/b ratio using biodrying reactor with five-level trays. This mixture inserted into the reactor tray, aerated at aeration flow rate 2 L/min from the compressor for nine days. The resulting SRF performed then characterized its moisture content, burning rate, and calorific value. The results showed that the biodryer reactor was successfully made with dimensions of 165 x 50 x 70 cm, consisting of five-level tray with a size of each level tray biodryer of 60 x 45 x 5 cm. The best SFR which has the highest heating value obtained from organic waste with vinasse 10%. It has a moisture content of 11.56%, the burning rate of 0.0135 g/sec, and calorific value of 3912.56 cal/g.
Analysis of the condensate phase in offshore pipe gas company
Authors: Zamrudy W , Rahmatullah A , Prayitno P , Wibowo A A 
Published: February 2021

AbstractGas transportation is usually done using pipes. As was done in one of the Gas Companies. In gas transportation consists of suppliers (Station A) and receivers (station C). From the supplier to the receiver goes through a very far pipe. Gas that passes through the pipeline has a composition consisting mostly of methane, but it is undeniable that there is still heavy carbon and impurities in the gas. Heavy carbon and various impuritis contained in the gas will disrupt gas transportation in the pipeline because it can cause condensate. Condensate consists of heavy carbon and impuritis which changes phase into liquid. The occurrence of liquid is caused by external and also internal influences, especially on the temperature and pressure that is treated to the gas. Condensate in the pipe will cause obstruction or decrease the volume in the pipe and otherwise it will cause internal corrosion. In the Gas Company there is an offshore pipeline that has the deepest depth of 70 meters. This elevation allows condensate inundation to occur in the offshore pipeline. The purpose of this study was to determine the effect of operating conditions on the occurrence of the existing condensate phase in the offshore pipeline between B Station B and C Station, which is 105 km away. The method used is the collection of gas composition data through gas chromatography analysis at station A, piping specifications, operating conditions at station B, and Hysys Aspen Simulation. It can be concluded that the offshore pipeline between B station and C station formed condensate (liquid phase) on 2nd day. The operating pattern of the envelope phase shows that in this condition natural gas condensate is formed because it is in the gas-liquid phase. If the methane composition and sea temperature are getting smaller, the possibility of natural gas condensate formation will be even greater.
Literature study of production dry cellulase from Trichoderma reesei, Aspergillus niger, and Bacillus subtilis
Authors: Maryanty Y , Wulan D R , Hidayati M D , Rizal D A , Aliffandri F 
Published: February 2021

Abstract
Cellulase is an enzyme that can degrade cellulose through a catalytic process. The enzyme that works synergistically to release sugar (glucose). This review aims to determine cellulase enzymes’ activation from three different microorganisms, Aspergillus niger, Bacillus subtilis, and Trichoderma reesei. Enzymes’ activation using various kinds of lignocellulosic substrates and the effect of adding carrier agents on the freeze-drying process. The cellulase enzyme from Trichoderma reesei has an activity of 3.4 IU / mL. This enzyme is produced by pre-treatment 1% H2O2 in lignocellulosic media. Aspergillus niger has a cellulase enzyme activity of 0.229 IU / mL using a sugarcane bagasse substrate that has been pre-treated by shiitake mushrooms. The cellulase enzyme from Bacillus subtilis has an activity of 0.907 IU / mL, with the addition of CMC levels of 5% as an inducer. Cellulase enzymes in liquid form are susceptible to denaturation during storage. The production of cellulase enzymes in solid form is expected to maintain the stability of the resulting cellulase enzyme activity longer. The addition of non-reducing sugar as a carrier agent in the freeze-drying process is reported to preserve the biological activity. The addition of sucrose and trehalose, each with a concentration of 300 mM, maintained the amylase enzyme activity up to 90%. The addition of sucrose with an optimum concentration of 60 mM protects both total protein stability and good lysozyme activity. It is suspected that a carrier agent with an optimal concentration can maintain protein stability in cellulase enzyme activity in this review.
Hydrothermal synthesis and characterization of nano-particles γ-Al2O3
Authors: Buwono H P , Adiwidodo S , Wicaksono H , Firmansyah H I 
Published: February 2021

Abstract
The study of hydrothermal treatment on the phase formation and the crystallites of gamma-alumina (γ-Al2O3) was performed. Different reaction time and temperature of hydrothermal treatment were investigated. The preparation of γ-Al2O3 includes precipitation of aluminum nitrate nonahydrate by ammonia, aging, washing, transferred the gel into the hydrothermal reactor, drying, and calcination at 600 °C. The precipitation was stopped at pH equals 7.5. The reaction times of hydrothermal treatment were 1 – 2 hours, and the temperatures were 140 – 200 °C. X-Ray Diffraction analysis was used to investigate the phase formation and the particle size. The results show all the samples represented pure nano γ-Al2O3. The examination of hydrothermal treatment of y-Al2O3 reveals as the reaction time longer, the crystallite grows bigger, as well as the higher temperature applied. The smallest γ-Al2O3 obtained based on the Scherrer equation is 4 nm and the biggest is 6.5 nm. Interestingly, the peaks of the γ-Al2O3 prepared by hydrothermal treatment at the longest time and the highest temperature have shifted into a higher diffraction angle. In the case of this sample, the peaks shifted into a higher diffraction angle. That is means there is a change in the lattice structure of γ-Al2O3 probably was affected by the lattice of hydroxyl content.
D-limonene from orange (Citrus Maxima) peel extraction as destructive agent of styrofoam waste
Authors: Hardjono H , Dewi E N , Lusiani C E , Febriansyah I , Bachtiar R I 
Published: February 2021

Abstract
Styrofoam is widely used for food packaging because it has good weight, stability, and stiffness but it cannot be decomposed naturally by microorganisms. D-Limonene, one of the monoterpene derivatives, is an environmentally friendly styrofoam solvent. This monoterpene is the main component of essential oil that can be extracted from orange peel. The aim of this study is to destruct styrofoam wastes (foods packaging, electronics packaging, foam boards and cup noodles) using d-limonene from orange (Citrus Maxima) peel extraction by water distillation process. The orange peel after size reduction is extracted by water distillation process at 94°C for 7 hours to produce essential oils. It was used to destruct styrofoam waste at the different volume ratio (1:0:0; 1:0:3; 1:1:2; 1:2:1) of the essential oil mixture (essential oil : ethanol: water). The result of this study shows that styrofoam wastes can be destructed using d-limonene from orange (Citrus Maxima) peel extraction. D-limonene of essential oil from orange (Citrus Maxima) peel can be used as destructive agent of styrofoam waste. The fastest destruction time of styrofoam waste occurs at electronic packaging with essential oil mixture by volume ratio of 1:1:2.
Performance evaluation of soil water content observation from satellite images in sediment disaster-prone area
Authors: Hapsari R I , Putri R I , Aponno G 
Published: February 2021

Abstract
Soil water content observations from remote sensing are growing for landslide disaster management due to the potential of wide coverage and fine resolution. Characteristic evaluation of various soil water content products is necessary for improving the accuracy. This study assesses soil water content products from Soil Moisture Active Passive from Global Modelling and Assimilation NASA, Soil Moisture and Ocean Salinity from ESA, and Soil Water Index (SWI) from Copernicus Global Land Service. Results are compared with soil test in terms of spatial and temporal distribution, time series, and quantitative performance indices. The study is conducted in Brantas River Basin Indonesia, where the upstream is vulnerable for landslide disaster. The investigation has shown that with correlation coefficient 0.81, SWI is suitable for further application in the study area. This finding has important implications for modelling the landslide hazard using quantitative soil water content product from satellite imagery.
Optimization of printed circuit board components placement
Authors: Purwanto R E , Sulistyono  , Mandayatma E 
Published: February 2021

Abstract
In order to optimize the throughput rate of these automatic systems, the time taken for the pick and place electronic components for each board has to be minimized. This study focused on optimization problems faced in automated assembly of electronic component in Printed Circuit Board (PCB). Components are placed on PCB where the process of pick-up and placement occurs starting from the machines to pick up the components from the feeder magazine. The number of components to be picked and placed maximum four components, depending on its contribution to minimize tour distance. Increased complexity of PCB assemblies, components and shorter product obsolescence timescales implies machines utilization must be maximized in order to achieve cost efficiencies. The difference in size and shape of components is handled by the head, which brings the optimization problem closer to real machine situation. In hope that the electro-pneumatic arm design can speed up the working time of installing components on the PCB and can add new designs to be registered for patents.
Application of the cascade system to increase the capacity of a pico-hydro power generation
Authors: Hidayat M N , Ronilaya F , Eryk I H , Setiawan A , Rohadi E 
Published: February 2021

Abstract
The Pico-hydro power generation is a power plant with a scale below 5 kW. This type of power generation is suitable for areas with streams or rivers with low water levels. One area that has natural conditions like this is the Javan Langur Centre (JLC), a rehabilitation facility for one of the endangered primate species, the langur. To support the operation of JLC, a pico-hydro power plant has been built, which has a capacity of 300 watts. However, due to the water discharge is quite low, the efficiency of the generator is less than 10%, of which, the total output power from the pico-hydro generator is about 27,3 watts. While the electrical energy requirements in JLC is around 50 watts for lighting. To meet the shortage of electricity supply, it is necessary to increase the power generated by the existing pico-hydro power plant, i.e. by applying a cascade system. This system utilizes water from the existing pico-hydro power plant drainage channel as the intake flow for the new pico-hydro power plant. This system also utilizes differences in elevation or water level to make the terraces. With the application of the cascade pico-hydro system, the electrical power requirements at JLC can be met.
Design generator of magnetic power (Based on gap rotor-stator motor magnet)
Authors: Susilo S H , Jannah Z , Kasijanto K , Adiwidodo S 
Published: February 2021

Abstract
The paper discusses magnetic power generators; if a conductor moves across the magnetic field, a voltage difference will occur at the ends of the conductors. The voltage rises as it approaches the area and vice versa, so electricity arises in cycles: positive - zero - negative - zero. In this study utilizing the rotation of a magnetic motor caused by the unbalance repulsive force between magnets. The design of the tool starts with designing a generator model that will be made. The design of generators is based on calculations obtained through the reference of generator design. The generator design uses magnets instead of anchor coils on the rotor (source of magnetic flux) and copper wire coils as anchor coils on the stator. This design considers rotor and stator parameters, including the distance between magnets, rotor diameter, rotor plate thickness, area of a magnetic area, number of stator coils, number of stator windings, and stator coil dimensions, and calculate generator output power. Tool testing is done to obtain data from tools that have been made. In testing the comparison of the results obtained from the study of the target to be achieved, if the results have not yet reached the target, then improvements are made to the results obtained as expected. Tests were carried out with no load and burden. The results showed that the rotor speed in the generator design could be achieved by determining the number of rotor poles, the generator voltage is influenced by the flux density produced by permanent magnets and the number of stator windings.
Low-cost Transverse Electromagnetic (TEM) cell design for radiated emission measurement
Authors: Hariyawan M Y , Darwis R S , Habibi B A 
Published: February 2021

Abstract
The increasing use of electronic and electrical equipment that continuously emits radiated emissions in the industrial, military, communications, household, and medical fields has increased dramatically over the past few decades. Radiated emission can interfere performance of other electronic devices around it. There is a demand for electric devices to comply with electromagnetic compatibility (EMC) standards before being marketed, requiring manufacturers to carry out EMC testing before devices enter the market. Transverse Electromagnetic (TEM) cells are usually used by designers to ensure that electronic devices comply with EMC standards. TEM cells for radiated emission measurement are widely used because they are cheap and time-saving before full compliance testing is carried out, which expensive for one-time screening. The main problems of commercial open TEM cells are relatively high price, weight, handling problems and portability. In this study, low-cost TEM cells were designed that could be used to test radiated emission generated by electronic devices. The fabricated TEM cells can operate up to 960 MHz and it can be used to test radiated emission generated from small electronic devices. It has better performance and more sensitive than branded TEM cells in the radiated emission test of a mobile phone.
Optimisation solar and wind hybrid energy for model catamaran ship
Authors: Setiawan B , Putra E S , Siradjuddin I , Junus M 
Published: February 2021

Abstract
Based on WindSat data from 2004 to 2014, Indonesia has an average wind speed of above 8m/second at sea. In addition, the energy potential of the sun is around 4.8 kWh/m2. A mechanical model ship with a catamaran type will be installed photovoltaic module and wind turbine generator which are equipped with microprocessor to control the angle of the wind turbine blades, the energy generated by the PV and wind turbine generator will be regulated by the dual input buck boost converter using the PID method to regulated voltage to 14 Volt used to charge the battery. The power stored in the battery will be used to drive the ship model propulsion system. This paper discusses about pv performance, generator performance, dual input buck boost calculation, and simulation. From testing the energy obtained is 774WH. From the simulation of the dual input buck boost converter circuit, the setling time is 11ms when using the PID control system and 35ms when using PI. Energy from the sun and wind can be combined into one with a dual input buck boost converter so that the energy can be absorbed is more optimal.
Feedback remover on the sound system using inverse phase method
Authors: Hariyadi A , Perdana R H Y , Hidayati N , Ratnawati Y 
Published: February 2021

Abstract
Currently, almost all activities carried out by all parties are inseparable from the sound system. With the sound system, it is not necessary to speak loudly. There are several types of sound systems or models, ranging from the cheapest to the most expensive, with the usual quality up to good. However, there is a problem that can be obtained by a sound system that is of good quality or the usual quality, namely feedback from the speaker to the mic. Feedback will be very annoying because of the entry of sound from the speaker to the mic, which should be avoided. By using the inverse phase method and narrow bandpass filter, the simulation results can eliminate the feedback signal that is 100%. However, there are side effects on the band that occurs feedback, which is the reduction in the sound signal by the feedback power level that occurs between 30% - 100% that are in the frequency band range.
Object detection on dental x-ray images using deep learning method
Authors: Suryani D , Shoumi M N , Wakhidah R 
Published: February 2021

Abstract
Radiological examination has an important role in determining the diagnosis of dental problems and making decisions about the right type of treatment according to the case indications. Dental x-ray is a medical procedure for taking pictures of the inside of the mouth using radiation fluid, where the results are used diagnostically to help the dentist see the entire structure of the jaw bone and teeth, and dental problems that cannot be seen directly. Dental radiographic interpretation, which is generally performed by dentists, is a time-consuming and error-prone process due to high variations in tooth structure, low experience levels, and fatigue factors experienced by dentists. The workload of a dentist and the occurrence of misdiagnosis can be reduced by the existence of a system that can automatically interpret the x-ray results. To overcome these problems, a model will be developed to be able to detect objects in the dental panoramic x-ray images using Mask R-CNN, one of the methods in Deep Learning. Deep Learning is an artificial intelligence function that modelled the workings of human brain in processing data and creating patterns for use in decision making. With the detection of objects in panoramic x-ray image automatically, it is expected to save time, improve the quality of dental care, and also the quality of diagnosis made by dentists.
Software testing on e-learning Madrasahs using Blackbox testing
Authors: Sutiah S , Supriyono S 
Published: February 2021

Abstract
Distance learning in the pandemic era of COVID 19 must meet the needs of the system. E-Learning Madrasah is an application program developed from the Ministry of Religious Affairs of the Republic of Indonesia. The learning that can be done in the pandemic era of COVID 19 corresponds to government directives. E-Learning Madrasah has an essential role in distance learning at the basic education level up to secondary education. To improve the software functionality required testing system. The following research uses the Blackbox Testing approach to e-learning Madrasah software testing. The testing scenario includes several scenarios, including login form testing, class setting testing, computer-based test testing, student learning evaluation testing. The scenario can be used to test functionality so that the recommendation results can be used to develop e-learning madrasah in the future. The resulting results showed e-learning Madrasah using the BlackBox testing approach to testing software functionality levels with the need to reach 90%. These results show from the experiment of some of the scenarios.
Analysis of fuel pressure on the performance of motorcycle engine with ethanol fuel
Authors: Irawan B , Winoko Y A , Puspitasari E , Dwiyono T 
Published: February 2021

Abstract
Gasoline engines fuel cannot be directly replaced with pure ethanol, moreover ethanol contains a lot of water. The purpose of the study was to analyze the effect of fuel pump pressure on performance of 4-stroke engine motor cycle by ethanol fuel. The independent variable is pressure of the fuel and the engine speed. The dependent variable is the engine power, torque, and specific fuel consumption. The power and torque test use inertia dynamometer. The results showed the addition of fuel pump pressure, at 3.5 bar pressure can produce higher power at each engine speed with a maximum power of 6 HP at 8000 rpm. As for the best results torque obtained at a pressure of 3.5 bar which is 5,5 Nm at 7500 rpm, besides that the lowest specific fuel consumption SFC at a pressure of 3,5 bar is 0.409 kg/HPh. The results of this study can be concluded that gasoline vehicles can use ethanol fuel by increasing the fuel pressure up to 3.5 bar.
Transform Domain Analysis of Multimodal Medical Image Fusion
Authors: Hima Bindu Ch. , Sridevi G. 
Published: February 2021

Abstract
Fusion of multimodal medical images ensures the quality diagnosis in the field of medical sector. Fused image possess extra substance of data than input individual scanned images. The fusion process can be carried on different clinical scan images wherever more subjective data is required. In this work, we are supposed to discuss the subjective treatment of multiple transform techniques (Discrete Fourier Transform (DFT), Discrete Cosine Transform (DCT), Hadamard Transform (HT) & Discrete Wavelet Transform (DWT)) significance in fusion process. These coefficients are fused with the correlation of the spatial frequency (SF) and visibility (V) factor values. The resultant images are visually and qualitatively verified with standard execution estimates like Peak Signal to Noise Ratio (PSNR), Mean Square Error (MSE) and Root Mean Square Error (RMSE).
Expediting International Student Admission Process Using Data Analytics
Authors: Valavala Mounicasri , Alhamdani Wasim , Indukuri Hemalatha 
Published: February 2021

Abstract
The student admission process is a critical step from both student and university perspectives. The students will benefit if the universities take admission decisions sooner rather than later, leaving them time to opt for another university in case of rejection. However, with the level of manual work involved in the student admission process, universities often take long durations for the admission decisions. Expediting the admission process using Data analytics starts new research across different tasks in educational institutes. The research presents a model to automate each step of the international student admission process in universities across the USA, using Data analytics. The model’s distinguishing capability is that it performs both predictive and descriptive analytics to analyze different student’s application sections and adapt to different admissions types with minor changes.