bluuebunny/crossref_metadata_2025_split huggingface dataset:
Characteristics of Porous Asphalt Mixture by Using a Bottom Ash Boiler as a Filler
Authors: Chaira  , Refiyanni M , Azwanda  
Published: February 2021

Abstract
Porous asphalt is asphalt mixture using open gradation dominated by coarse aggregate to produce a large enough cavity. Bottom ash waste produced by a boiler used in the extraction process of palm oil into crude palm oil. Shells and pulps that has been burned at high temperature between 500°C to 700°C will later become of boiler bottom ash. The aim of this study was to inspect the performance of Porous Asphalt Mixture characteristics which combining bottom ash boiler and cement as filler using Retona Blend 55 as a binder. The specimen preparation were designed by the Australian Asphalt Pavement Association (AAPA) method by parameter of Cantabro Loss (CL), Asphalt Flow Down (AFD), Voids In Mix (VIM), Stability and Marshall Quotient (MQ). The Optimum Asphalt Contain (OAC) obtain was used to prepare specimens within OAC with variation 50 % bottom ash boiler and 50 % cement as filler. The result of study showed that the OAC obtained 6%. Almost all parameter values were meet to the required specification of AAPA (2004). The value of CL is 9.25 %, AFD value is 0.19%, Stability 573.27 kg, flow 4.7 mm and VIM 12.29%. The value of VIM not meet to required specification (18%-25%).
Experimental Study of Heat Transfer Using Water – Cooled Condensers to Increase Oil Production from Plastic Waste
Authors: Suryadimal  , Arman Rizky , Sundari Elmi , Darmayanti Yeasy , Efendi Raimon 
Published: February 2021

Abstract
This study aims to determine the performance of the heat exchanger in Low Density Polyethylene non-organic waste refining tools into fuel oil. This research is an experimental study that uses plastic waste obtained from scavengers and then cleaned, dried and chopped with a small size and then inserted into a three condenser level during a certain time. After the combustion temperature rises, water as a cooling medium is flowed in the pipe so that condensation occurs in the oil pipe. The results of the test carried out in the process of cracking plastic waste into fuel oil are affected by time, volume, temperature and heat transfer rate. Testing time for 30 minutes on the condenser obtained the heat transfer rate in the pipe 558.4 W, at 60 minutes the value of heat transfer was 732.2 W, while at 90 minutes the average heat transfer value was 1039.7 W. There was an increase in the heat transfer value as it increased Combustion time and oil produced by the reactor averaged 812 ml.
Analysis of Effect Electric Field Strenght on Safe Distance Below Main Substation Busbar 150 kV
Authors: Yusuf H , Ahkadun N 
Published: February 2021

Abstract
This research is to analyze the effect of electric field strength on the safe distance under the 150kV substation busbar. The research was conducted at 150 kV substation Rancaekek, substation Rancakasumba, substation Cikasungka. The electric field exposure threshold value according to SNI, ICNIRP, IRPA/INIRP and WHO is 10kV / m for the working community. The lowest distance of the busbar conductor to the ground surface is 7.5m. Measurements and calculations of transverse electric field strength from busbar 1 to busbar 2. The height of the test point is 0 m to 2.3 m from the ground surface. From the results of the calculation of the electric field, strength obtained that the shortest minimum safe distance is 7.48 m, while the highest minimum safe distance is 7.88 m. From the results of the measurements of the electric field From the results of measurements of electric field strength obtained that the fastest duration of electric field exposure was 4.42 hours while the longest electric field exposure duration was 5.75 hours. From the calculation of the electric field, strength obtained that: the fastest duration of electric field exposure is 7.56 hours while the longest duration of electric field exposure is 7.91 hours.
Analysis of SOS Results for Engine Lubricants Contaminated by the Fuel in The 3516 TA Diesel Engine Generator Set
Authors: Wilarso  , Domodite Aswin , Sholih Hilman , Mujiarto  
Published: February 2021

Abstract
Generator Set Unit that operates in the PLTD, during operation there is a knocking sound at cylinder position # 14, after checking and removing the injector there is diesel in the combustion chamber and indicated glowing in the exhaust manifold. The purpose of this study is to determine the root causes of knocking and diesel fuel in the combustion chamber. This research method uses oil sample testing to be tested in the laboratory. The results of the analysis of oil contaminated with diesel fuel are caused by diesel oil flowing into the pan oil and after checking the cylinder head crack (groove-shaped) is found on the side of the injector seal holder, when the unit is not operating the diesel flows into the combustion chamber and into the oil reservoir. The groove in the cylinder head is formed, caused by a hard injector seal caused by fuel temperature and high water temperature. The solution of this research is that the pressure on the fuel return from the engine should not exceed 27 kPa, while the maximum fuel temperature is 66 °C (150 °F), and what needs to be done is an improvement of diesel cooling and routine radiator maintenance.
Analysis of Occupational Safety and Health Systems in Bridge Construction Development Logistics Systems: Case Study at Cibeureum Bridge, Sukabumi
Authors: Ichwan N.E , Sutoni Akhmad , Khoerunnisa Siti Tsana , Mujiarto  
Published: February 2021

Abstract
The implementation of the Occupational Safety and Health System in general is still often overlooked. This is indicated by the high number of work accidents that occur. in Indonesia. One of the factors that influence the level of work productivity is the safety and health of workers. Therefore, the application and evaluation of the Occupational Safety and Health System can reduce the level of work accidents. The case study was carried out at the Cibeureum bridge, Sukabumi Segment-3. This study uses qualitative methods, namely by descriptive analysis based on data and observations in the field. The results obtained, the safety and health system has been quite well planned by the company. But there must be an improvement in the planning process in forming a Special Committee on Safety and Occupational Health and Safety Officer. Standards and guidelines used to regulate the implementation of the Occupational Safety and Health System are compiled in an integrated Work Safety Plan from the Contract Quality Plan. This refers to the applicable laws and regulations. Made based on customer requirements. This can be seen based on the existence of commitments and policies, planning, implementation in the construction phase, performance monitoring and evaluation, as well as reviewing and improving the performance of the Occupational Safety and Health System carried out by management.
Machine Learning Sentiment Analysis in Detection System for Rupiah Currency Value Using SysML Language
Authors: Aurachman Rio , Ramadani Luthfi , Utomo Nino Setyo 
Published: February 2021

Abstract
Currency values fluctuate. Some research has tried to find ways to predict the value. One that can be a sign and a trigger for changes in currency values is the people’s sentiment. This paper tries to propose a system and programming script that can predict currency values using sentiment analysis. The system is designed using SysML. The algorithm used is Bag of Words R Programming.
Information System Control and Improvement Process Design based on Clause 8 ISO 20000-1:2018 using SysML Language
Authors: Aurachman Rio , Utama Nur Ichsan , Habibie Jauhari 
Published: February 2021

AbstractThe development of quality information systems has become one of the important strategies in increasing business competitiveness and increasing the added value of products and services. Information systems as a service require a process of continuous improvement. The continuous improvement includes the process of getting feedback for the system’s continuity and then making improvements based on that feedback. Not much research has applied the information system control process based on ISO 20000-1: 2018. This research tries to propose this.
Technology-based education
Authors: Friyanto A , Prasetyo I , Albar C N 
Published: February 2021

Abstract
This study aims to determine the benefits of technology and the opportunity to do business in the world of education. To analyze the data, this research used descriptive and quantitative methods, namely descripting the data in a subjective and objective form of words and images. The results of the study showed that technology plays a very important role in education because it is very helpful in improving knowledge when students do not have or cannot contact their supervisor/teacher. This study concludes that in the world of education, it cannot be denied that efficient and effective learning process information technology is needed at this time. Therefore, the opportunity to start an Education Technology business is very promising because it is considered efficient and effective.
Grafting of Maleic Anhydride onto Cyclized Natural Rubber in the Melt Phase: the Effect of Trimethylol Propane Triacrylate
Authors: Said Siregar M , Ardilla Desi , Eddiyanto  , Nasution Asmara Sari 
Published: February 2021

Abstract
The grafting product of maleic anhydride onto cyclizednatural rubber have been produced in the presence of trimethylol propane triacrylatecomonomer which is processed in an internal mixer 150°C 80 rpm. In this research, the ratio of Tris / maleic anhydride used is 1: 2; 1: 1 and 2: 1.All grafted product was purified to determine the degree of grafting for each graft product by the titration method. The degree of grafting increases with increasing trimethylol propane triacrylate mole ratio. The highest degree of grafting is obtained in moles ratio of 2: 1 which is to 5.88%.
Minimize waste on production process using lean concept
Authors: Dewi SK , Utama D M , Rohman R N 
Published: February 2021

Abstract
This research aims to analyze and minimize the waste that occurs in the production process by using a lean production approach. One of the factors that can influence ineffective and inefficient in the production process is waste in the production process. An effective and efficient pr oduction process will support the company to increase productivity. The problems that occur in company X are companies that still often experience delays in meeting consumer demand, and there are still defect products. These problems have to be solved. One approach is to incorporate lean principles in the production process. From the results of the analysis, activity mapping obtained the value-added activity (VA) has the lowest percentage of 13.60% and non-value-added activities (NVA) has a percentage of 59.80%, which cause of delay. Solution to minimize waste are improve inspection process, scheduling maintenance, make standard operation procedure and reduce set up time.
Flow visualization analysis on the vertical axis Savonius water turbine by placing a cylinder in front of returning by varying stagger angle
Authors: Setiawan P A , Yuwono T , Widodo W A 
Published: February 2021

Abstract
This work will investigate the effect of the circular cylinders distance variation perpendicular the free stream installed in front of the returning to increase the turbine performance. Computational Fluid Dynamics using Gambit 2.2.30 software and ANSYS 17.0 software has been used to solve the incompressible URANS. Numerical model is validated towards experimental data at TSR 1.078. The working fluid is in verification using air at Reynolds of 4.32 x105. The ds/D is 0.5 at gap (S/D) of 0.95 with varying stagger angle of 0°, 30°, 60° and 90° with TSR of 0.3, 0.5, 0.7, 0.9, 1.1 and 1.3. The change of the stagger angle increase the turbine performance at a stagger angle of 60° followed by the increase of pressure in front side and reduce of the back of blade. In addition, stagger angle of 0° influences a circular cylinder become blockage and decrease the performance.
Computer Modelling of the Information Properties of Hyper Chaotic Lorenz System and Its Application in Secure Communication System
Authors: Rusyn Volodymyr , Mujiarto  , Mamat Mustafa , Azharul Firmansyah , Mada Sanjaya W. S. , Sambas Aceng , Dwipriyoko Estiyan , Sutoni Akhmad 
Published: February 2021

Abstract
This paper presents computer modeling, analysis and research of the hyper-chaotic Lorenz system based on programming interface that has been developed in LabView software environment. This study allows for generating and research of the main information properties of hyper-chaotic Lorenz system, focusing on time distribution of the four chaotic coordinates, phase portraits and Lyapunov exponents. The programming interface demonstrates the algorithm of masking and decrypt of the information carrier.
The Role of Farmers Readiness in the Sustainable Palm Oil Industry
Authors: Apriyanto M , Partini  , Mardesci H , Syahrantau G , Yulianti  
Published: February 2021

Abstract
One effort currently made by the Indonesian government to ensure the sustainability of the development of the palm oil industry is to create a sustainability standard called Indonesian Sustainable Palm Oil (ISPO) in presidential regulation no 44 in 2020. The purpose of this study is to determine the value of the ability of independent coconut farmers palm oil in Indragiri Hilir to meet the Indonesian Sustainable Palm Oil (ISPO) standards and identify the problems faced in achieving these standards. Evaluation of the ability of independent smallholders to achieve ISPO standards is carried out by an audit method, the results of the assessment of all parameters set in accordance with the Principles, Criteria and Inductors. The Criteria and Indicators contained in the ISPO provisions are then assessed in percent. The audit method is carried out in a quantitative descriptive analysis of the appropriateness of ISPO principles, criteria and indicators by comparing the implementation of legality, organization and management, management and environmental monitoring implemented by independent smallholders. Readiness of ISPO application for smallholder farmers by evaluating four principles, 20 criteria and 47 indicators. Of the 47 indicators determined in the ISPO requirement for self-help patterns, as many as 58.94% of the ISPO indicators have never been implemented by independent smallholders and 42.06% of the ISPO indicators have farmers running them. From ISPO indicators that have been carried out by independent smallholders, only a small portion of independent smallholders are run.
The Effect of Modern Dressing Using Mix Cadexomer Iodine Hydrogel on Wound Healing Process in WCC Pati
Authors: Hartinah Dewi , Hartotok  , Yusuf Effendy 
Published: February 2021

Abstract
Diabetes mellitus is a chronic metabolic disorder due to the pancreas not producing enough insulin or the body cannot use insulin produced effectively. The purpose of this study was to determine whether there is an effect of modern dressing using cadexomer iodine hydrogel mix on the process of DM wound healing in WCC Pati. This type of research uses quasy-experiment with pre-test post test control group design. The sample of this study was 22 people, data collection using the Bates Jansen Wound Assessment Tool. Analysis using the Mann Whitney U Test statistical test. The results of the study showed that the p value of the intervention group was smaller than the p value of the control group so that the administration of the cadexomer iodine mix hydrogel was more influential in the process of DM wound healing compared to the control group that was only given the hydrogel.
Operational Risk Analysis at Agribusiness and Technology Park (ATP) IPB, Bogor, Indonesia
Authors: Fauzi Aditra M. , Nurhayati Popong , Jahroh Siti 
Published: February 2021

Abstract
ATP IPB is an autonomous business unit under Teaching Farm Sub Directorate of IPB’s Business and Entrepreneurship Development Directorate. It produces fruits and vegetables from its own farm and farmers as its partners, and also sells the produces mainly to modern markets. It faces risks in operating its business, especially operational risk. This study aims to: (1) identify ATP operational risk, (2) measure risk based on likelihood and impact, (3) analyze the root causes of ATP operational risk, and (4) provide alternative solutions to the underlying causes. The study was conducted in January to April 2019. Risk level map, risk map, and cause-effect diagram were employed in this study. Results showed three main risks, namely (R1) the output of ATP’s partner did not reach the target, (R2) the output of ATP’s partner exceeded the target, and (R3) the farmer’s production did not reach ATP standard. Risk R2 is included in the low risk level, risks R1 and R3 are included in the extreme risk level. The root causes of the three risks are ineffective penalties, no priority for the screen-house, no priority for increasing the workforce, relationship between supervisor and partner farmers are still transactional. Alternative solutions that can be proposed are participatory assistance, contract review, screen-house implementation, and the formation of farmer groups.\
Analysis on the dislocation of GaN on different substrate
Authors: Chen Yilun 
Published: February 2021

Abstract
Though there are still disputes on whether the threading dislocation density (TDD), to produce high quality Gallium Nitride ( GaN ) with low TDD is needed. In this passage, we would first show the impact of dislocation and review the latest methods to reduce dislocation on Si, GaN, and sapphire. The Si substrating with serpentine channels could produce GaN by using Si substrate with low density dislocations. The method that use the markless-3D provides a new way to reduce the dislocation from big off-angle. The multiple-step growth technique controls the conditions of crystallization and use two steps of crystallizing to grow with both low dislocation density and 2D growth shape. The last method is to use the Na-flux method to exclude cracks with sapphire in crystal.
Research on the time delay law of water-aluminium alloy interface based on ultrasonic phased array technology
Authors: Wang Yajun , Li Guoping , Wu Xianglong 
Published: February 2021

Abstract
Based on the ultrasonic phased array technology, the time delay law of ultrasonic deflection and focusing at the water-aluminium alloy interface is studied in this paper. By changing the delay time applied on each array element, the immersion ultrasonic phased array technology can realize the preset deflection angle and focusing depth, so as to detect different angles and depth positions of the work piece. The principles of ultrasonic phased array deflection and focusing are studied based on Huygens principle, and the time delay law is obtained when the sound beam is deflected and focused. When ultrasonic waves deflect and focus at the water-aluminium alloy interface, the Matlab software is used to simulate the time delay law and sound field distribution, which verifies the correctness of the design and calculation of the time delay law.
Design of Torque Motor Characteristic Test System
Authors: Zhang Huajin , Lin Fan , Zhang Xin , Wen Xianghua 
Published: February 2021

AbstractThe steering gear is an important part of the guided missile control system and the actuator of the flight control system. The torque motor is one of the key components of the steering gear. Its performance directly affects the performance of the steering gear and directly determines the dynamic quality of the guided missile during flight. According to the composition and working principle of the torque motor, to judge its performance, the no-load angular displacement characteristics and pressure characteristics of the torque motor should be tested. In order to accurately and quickly measure the performance of the torque motor under working conditions, the design of the torque motor test system is realized based on the virtual instrument development software. The test system mainly includes two parts: a hardware platform and a human-computer interaction interface. The hardware platform mainly includes an industrial computer, a torque motor test bench, a control box and a data acquisition card. The human-computer interaction interface has the functions of test parameter setting, data acquisition, data processing, data storage and form printing. The torque motor test system has the advantages of small prototype size, convenient operation and accurate test results. The test results show that the test method of the test system is reasonable, the test system runs reliably, the test efficiency is high, it can carry out stable and real-time data collection and processing, is easy to operate and maintain, and meets the key requirements of torque motor testing.
Pilot’s mental workload nonlinear correlation among objective and subjective measurements
Authors: Alaimo A , Esposito A , Orlando C 
Published: February 2021

Abstract
In the aviation framework, the workload evaluation is influenced by human factors effects both for pilots and ground operators. Nevertheless, the measurement of workload is of great importance to prevent human errors due to fatigue. In the present work, correlation analysis has been carried out to investigates the relationship between subjective and objective workload measurements. An experimental campaign was conducted using a full flight business aircraft simulator. Particular attention has been paid to the NASA-TLX subscales contribute. In terms of objective measurements, three different indexes gathered from heart rate variability have been considered. As the main result, the frequency-domain index reveals a large correlation effect with the workload subscale for the maneuvers taken into account.
Free-drop simulation and analysis of Full-screen smartphone based on ABAQUS/CAE
Authors: Cao Zhong , Li Weijie , Chen Zhuo , Wang Feng , Shang Wenli 
Published: February 2021

Abstract
Finite element analysis (FEA) provides numerical modeling and testing methods of stress analysis for products. The time of products development cycle can be shorten and the cost for products physical testing can be reduced with FEA. Drop test is one of the important tools uses for the impact behaviour study of cell phones, which identifies weak design points during the impact behaviour of cell phone. With the development of technology and growing of people’s demand, the screen of cell phone is getting bigger and bigger. Full-screen smartphones have become a trend. It is necessary that modeling and analyzing for full-screen smartphones are considered. This study conducts free-drop simulation and analysis on full-screen smartphones based on ABAQUS/CAE.
Dynamics of the movement of the descent vehicle in the atmosphere of Mars with the use of inflatable brakes in the lower atmosphere
Authors: Chen Danhe , Richier Léo , Koryanov Vsevolod V 
Published: February 2021

Abstract
Currently, more and more spacecrafts are being designed, to explore the planets of the solar system. One of the very important stages in the execution of such missions is the movement from the moment of deorbiting until the moment of approaching the surface. The entire descent trajectory from the moment of separation to contact with the surface is a very important stage and a very important object of research particularly in the field of Computational Fluid Dynamics (CFD). It is to this process that a series of articles by the authors is devoted. This article is devoted to the movement of the descent vehicle in the lower atmosphere. Some parameters of the descent vehicle movement at this stage of movement are analyzed. The importance of such research and the possibility of using inflatable braking devices are shown.