bluuebunny/crossref_metadata_2025_split huggingface dataset:
SMS Application in bird feed scheduling automation
Authors: Saputra D H R , Syahrorini S , Ahfas A , Jamaaluddin J 
Published: December 2019

AbstractWith the SMS application, it can be used as a medium for automation of bird feed scheduling, so that poultry farmers are easier to feed birds. Scheduling bird feed can be done continuously, with the aim of avoiding excessive amounts of feed. This application works according to the specified time of the bird owner. This application uses a servo motor to open and close the bird feed reservoir valve, the Microcontroller system as the main controller, SIM800L as a provider of information in the form of SMS, and RTC as a time scheduling system. Bird feed scheduling can be done per second. GSM is used to notify the owner when the system is running. Signal factors during experiments using GSM depend on bad weather or signals tend to be difficult when sending information to bird owners. The process of a servo motor with an angle of opening and closing itself between 0°-90° with a delay time of 50 seconds. For SIM800L a voltage between 3.8-3.9 volts is needed.
Street lighting efficiency with particle swarm optimization algorithm following Indonesian standard
Authors: Eriyadi M , Abdullah A G , Mulia S B , Hasbullah H 
Published: December 2019

Abstract
This paper aims the street lighting efficiency optimization of street lighting on Dr. Setiabudhi street, Bandung city. Particle Swarm Optimization (PSO) algorithm is used to get maximum lighting efficiency values with constraints in the form of lamp height, the distance between lights, lamp power, type/width of the street, the average illuminance and minimum illuminance according to Indonesian national standards (SNI) standards. Parameter optimization to obtain optimal values based on global standards and Indonesian national standards (SNI) has been done. PSO using MATLAB® (R2017a, MathWorks Inc, USA) has produced a street lighting optimization model with the level of lighting efficiency twice higher than the evaluation of existing conditions. Testing the results of the PSO algorithm shows a difference of 9.7% higher than the DIALux evo (8.0, Ludenscheid, Germany) software design. The test results show that the PSO algorithm can be used to obtain optimum lighting efficiency from a public street lighting system following SNI.
Development of a 500-1000 watt Pico hydro Hybrid Solar Power Plant prototype
Authors: Ratnata I W , Sumarto S , Saputra W S 
Published: December 2019

Abstract
In this study a prototype of a Hybrid Power Plant (PLTH) will be built that integrates the Pico-hydro Power Plant (PLTPH) and the Solar Power Plant (PLTS). The prototype of the PLTH to be built has a capacity of 500-1000 watts. From the making of the prototype-1 it was discovered that the PLTPH produced a maximum power of 86 W (from a capacity of 100 W) and the PLTS produced a maximum power of 30 W during bright weather and 23 W when the weather was dim (from a capacity of 100 W). The results of testing on prototype-2, it is known that PLTPH with a capacity of 600 W produces maximum power of 257.48 W and PLTS with 3 x 200 Wp (watt-peak) solar panels producing maximum power of 176.4 watts. After some adjustments, the electrical energy from these two sources is then stored in the battery. Electrical energy from PLTS is stored on the battery after going through the MPPT Solar Charge Controller; while the electrical energy from the PLTPH is stored on the battery after the electricity voltage is lowered and rectified with the rectifier. From the results of observations and measurements during testing, these two sources of electrical energy can charge the battery normally. Electrical energy from batteries that are direct current electricity is then converted into electrical energy alternating current of the power frequency to be supplied to the load, especially the electric load of alternating current.
Evaluation of trip generation and trip attraction of shopping centre on traffic performance in Denpasar city
Authors: Pratiwi N M W , Sriastuti D A N , Sumanjaya A A G 
Published: December 2019

Abstract
Teuku Umar St is one of the roads in Denpasar City with very high vehicle density and side barriers. This is due to the large number of activity centers that result in trip generation that affect the traffic performance, one of which is the Level 21 shopping centers. Traffic surveys are carried out on Teuku Umar St and Diponegoro St which are the exit gates of Level 21. Results This evaluation is obtained as follows (1) The traffic volume on Teuku Umar St is 4659.5 pcu/hour, with a V/C Ratio of 0.87 having a level of service at the level of “E”. (2) Traffic volume on Diponegoro St is 1948.5 pcu/hour, with a V/C Ratio of 0.71 having a level of service level “C”. (3) Operations of Level 21 shopping centers affect the performance of the Teuku Umar St segment by 315 pcu/hour for pulling and affecting the performance of the Diponegoro St section of 260.6 pcu/hour for generation. (4) Level 21 shopping center operations affect the performance of Teuku Umar St segment by 13.4% and affect the performance of Diponegoro St by 13%. Through the results of this study, it is necessary to study management handling of traffic.
Controllable and observable control design of wind generator system using PID algorithm
Authors: Setiawan B , Riskitasari S , Putri R I , Adhisuwignjo S , Syamsiana I N , Nurwicaksana W A 
Published: December 2019

Abstract
This paper describes a design process of the wind generator control system. Controlling a wind generator, fan, is important to study the design of the wind turbine. A complex wind generator model was approximated with 5th order polynomial function. The paper describes a procedure for identifying system, especially for finding the transfer function of a plant, that based on input and output. The plant’s input is an electric motor fan voltage and output is wind speed produced. It’s important to simplify control’s design of the wind generator for configuring transfer functions of the plant. The identification method that is used is Linear Regression, applying Excel program, which produces a polynomial function. And then, the Matlab’s System Identification Toolbox (SIT), which produces a transfer function. From this study, applying SIT, a model of wind generator, shows the fit estimation data is 90.78% and MSE is 0.078%. A closed-loop control system using PID controller is proposed. Controllable and Observable of the state space model were verified. The best performance of the close-loop system was achieved using Kp=0.2247, Ki=6.05*10-5, and Kd=208.75 applying Ziegler-Nichols. The results showed that the closed loop stability by applying PID can stabilize the wind generator.
Electronic control for optimizing power absorption of darrieus vertical axis wind turbine by adjusting angle of attack method
Authors: Setiawan B , Nurwicaksana W A , Syamsiana I N , Adhisuwignjo S , Riskitasari S , Joelianto G , Putri R I 
Published: December 2019

Abstract
This paper presents a mechanical design and electronic control for the angle of attack on the Vertical Axis Wind Turbine (VAWT) darrieus type with NACA0015 and 3 blades. This research was conducted to obtain high-efficiency absorption power on various wind speeds. The VAWT mechanical design is based on systematic calculations with a height of 150cm and a diameter of 120cm. NACA0015 airfoil with calculations in the NACA airfoil database obtained blade length of 15.892cm and width of 1.905cm. The electronic control on this system, Arduino mega controller, has input from an anemometer sensor, and rotary encoder sensor. While, the output is servo motors for 3 blade. A microprocessor control unit is programmed to control the adjustment of blade angle of attack. The angle of attack is defined by wind speed, angular speed of VAWT, and a defined TSR (Tip Speed Ratio). The angle of attack control method is PID (Proportional-Integral-Derivative) algorithm. By setting the TSR value constantly at 3-4, the angle of attack will be adapted even on any various wind speed. Expected result, the maximum power absorption will be obtained on various wind speed. This system can increase power efficiency of VAWT up to 35-40%.
Study of Nusantara Satu Satellite parameter evaluation for broadband application in Indonesia
Authors: Maruddani B , Sandi E , Dara W 
Published: December 2019

Abstract
This study aims to evaluate the performance of Satellite Nusantara Satu which has just been launched. Nusantara Satu Satellite is a broadband satellite that uses High Throughput Satellite (HTS) technology and uses Ku-band transponders to cover all regions in Indonesia. However, the use of Ku-band frequencies in Indonesia, which is located at a tropical region, must be evaluated because of the characteristics of the Ku-band frequency are very vulnerable to rain attenuation. In general, a broadband service requires link availability of 99.9% with a minimum speed of 100 Mbps. Our simulation results show that in the western part of Indonesia, to reach 100 Mbps with 99.9% link availability, the EIRP of the earth station VSAT is minimum at 79 dBW. In the central part of Indonesia, to reach speeds of 100 Mbps with 99.9% link availability, the EIRP of the earth station VSAT is minimum at 83 dBW. And in the eastern part of Indonesia, to reach speeds of 100 Mbps with 99.9% link availability, the EIRP of the earth station VSAT is minimum at 84 dBW.
Effect of Near-Dry Machining (NDM) on surface roughness through sustainable turning of mild carbon steel using coated carbide
Authors: Nur R , Suyuti M A , Mukhsen M I , Ikram I 
Published: December 2019

Abstract
Sustainable production as a global word, content important elements on all the fields as well as machining processes. Turning is one of the most fundamental and indispensable processes of metal removal in the industry. Increasing pollution preventing initiatives globally and consumer focus on environmentally conscious products has put increased pressure on industries to minimize or eliminate the use of cutting fluids. The use of Near-Dry Machining (NDM) in machining operation is one of the most effective strategies in this direction to achieve sustainable machining system. This study was purposed to determine the influence of NDM coolant system on surface roughness when turning of mild carbon steel, include power demand. A detailed comparison has been made with dry cutting to assess the process performance on the basis of surface roughness and power demand. The results indicate that providing a reduction on surface roughness and power demand more effectively than dry cutting at high-speed conditions, thereby to achieve sustainable machining system.
The effect of mother channel width on biometric flow field towards polymer electrolyte membrane fuel cell performance
Authors: Fahruddin A , Ichsani D , Taufany F , Widodo B U K 
Published: December 2019

Abstract
Leaf shape biometric design shows promising potential as a flow field to supply air reactants in Polymer Electrolyte Membrane Fuel Cell. However, studies that discuss the dimensions of biometric flow field in detail are rarely encountered. The channel width can affect the supply of reactants, the better the supply of reactants the better the cell performance can be achieved. In this study we investigated the effect of the mother channel width on the biometric flow field towards cell performance using numerical simulations. The model is composed of 9 layers with 25 cm² of active area. The channel dimension is varied by considering Murray’s theory. Simulation results show that the optimal width of the mother channel can increase power density by up to 6% compared to other variations. This increase can be achieved due to a more uniform distribution of oxygen concentration.
Optimizing machining time for CAD / CAM milling programming using the Taguchi method
Authors: Mulyadi M , Alfiansyah W , Akbar A , Firdaus R , Andita N F G 
Published: December 2019

Abstract
The CNC milling machining process is a very important process in manufacturing products because it affects the profitability of the production process. CAD / CAM programming software tools speed up the process and predict the production process time. This study uses CAD / CAM simulation of HSM operations and uses the Taguchi method which is a method that can optimize process variables to get a good response. Process variables chosen are Speed, feed rate, depth of cut, step over, stay on surface and radius link. The type of tool used is an end mill with a diameter of 20 mm SECO Jabro-Solid-JS554 standard. The results of the study stated that the HSM machining simulation process that had a greater influence on machining time was feeding 680 mm / minute and 5 mm depth of cut. The experimental results confirm the ideal time produced is 34.25 minutes.
Modelling of regenerative braking system for electric bus
Authors: Islameka M , Leksono E , Yuliarto B 
Published: December 2019

Abstract
Regenerative braking is a way to harvest electric energy from braking mechanism which usually implemented in electric vehicles. Braking strategies are required to maximize the use of regenerative braking systems. This research aims to design a regenerative braking model for a medium-sized electric bus. Measurements of latitude, longitude, elevation, and speed were firstly conducted by using GPS-based OsmAnd Android application. Transjakarta Corridor 1 (Kota-Blok M) was used for a test track with a distance of 14 km. Besides using data from measurements using GPS, WLTP (Worldwide Harmonised Light Vehicle Test Procedure) data is also used for comparison. This study produced a braking strategy model that considers aerodynamic, rolling, and grade resistances as well as electrical component specifications of the electric bus. The model design is then compared to the existing serial and parallel strategy. With the design of this system, the regenerative braking model can harvest more energy which increases the mileage of the electric bus.
Immersion cooling as the next technology for data center cooling: A review
Authors: Kuncoro I W , Pambudi N A , Biddinika M K , Widiastuti I , Hijriawan M , Wibowo K M 
Published: December 2019

Abstract
The utility of the world internet is on the rise as it is recorded that 46% of the world’s population have become internet users who generates data traffic of up to 8 zettabytes daily. This increase has triggered the growth of data center infrastructure as processing, storage and communication system in the digital world. The data center itself has contributed 1.5% to the total world electricity consumption and this is expected to increase with time. The proportion of energy used in the data center covers 52% for information technology (IT) equipment, 38% for cooling and 10% for supporting devices. One of the problems faced by these centers over the years is the cooling of the information technology (IT) components. This paper describes a cooling model that has the potential to improve the efficiency of energy used in data centers. Numerous studies have been carried out and one of them involves the use of immersion cooling technique as it promises improvements in the energy efficiency of data centers, using dielectric fluids that have high heat capacity. Several types of fluid used in this method are identified and discussed in this paper.
Barriers to the adoption, acceptance and public perceptions of Electric Vehicles (EV) in Indonesia: Case studies in the city of Surakarta
Authors: Syamnur F H , Pambudi N A , Biddinika M K , Wardani N S 
Published: December 2019

Abstract
Electric Vehicle (EV) is one of the technologies in the transportation industry that reduces the amount of toxic emissions. However, EV faces some technical difficulties in terms of the implementation as its application is still far from competing with Internal Combustion Engine (ICE) vehicles in numerous countries. The public acceptance of EV is considered an obstacle, hence, this study will further examine the public perceptions of price, performance, infrastructure and acceptance of this technology. Furthermore, an incentive policy was offered to the respondents as the survey was carried out using a quantitative approach in Indonesia with Surakarta City residents as the population. The results of this study contribute as a reference for policy makers to draft energy plans and transportation policies and as a discussion material for EV companies in their development.
Organic Rankine Cycle (ORC) in geothermal power plants
Authors: Hijriawan M , Pambudi N A , Biddinika M K , Wijayanto D S , Kuncoro I W , Rudiyanto B , Wibowo K M 
Published: December 2019

Abstract
Organic Rankine Cycle is a technology that convert low-temperature heat sources into a mechanical energy, and it can be used to produce electrical energy in a closed system. The heat sources can be received from renewable energy such as geothermal, solar, and biomass. Furthermore, the ORC system can also be used to increase energy efficiency in the industry by utilizing the waste heat produced. Therefore, there are two classification of the ORC system, namely a heat recovery system and binary power plant. Recently, the ORC system has made a thrive in the geothermal power plant. The ORC system can be applied to resources with low to medium temperature characteristics (<90°C - 150°C). This paper will present an overview of the implementation, model, and innovation of ORC system technology in geothermal resources.
Microwave absorption properties of single and double-layer absorbers based on BaFe12O19 and SiO2
Authors: Marpaung M A , Handoko E , Jalil Z , Alaydrus M 
Published: December 2019

Abstract
In order to study a new microwave absorption properties of single and double layer barium hexaferrite and silica have been investigated in X-band (8.2–12.4 GHz) frequencies. Barium hexaferrite BaFe12O19 was synthesized by ceramic method and Silica SiO2 was prepared from beach sand. Barium hexaferrite and silica SiO2 with a total thickness of 3 mm, 4 mm, 5 mm, 6 mm and 7 mm, were characterized at room temperature using vector network analyser (VNA) Keysight PNA-L N5232A. Reflection loss (RL) of single and double-layer absorbers of barium hexaferrite and silica were calculated and simulated using the transmit line theory. The minimum RL value (less than − 10 dB) of single layer barium hexaferrite is −21 dB at 9 GHz. The minimum RL values (less than − 10 dB) of single layer silica SiO2 is −40 dB at 9.2 GHz with 4 mm of thickness. The results show that double layer absorbing material showed different RL values than single layer of barium hexaferrite BaFe12O19 and silica SiO2.
Profile affective abilities of vocational students in electrical energy conservation
Authors: Kurniawan A , Rustaman N Y , Kaniawati I , Hasanah L 
Published: December 2019

Abstract
The purpose of this study is to obtain an overview of the profile of the affective abilities of vocational students concerning the discourse of electrical energy conservation. The research method used is qualitative research which aims to explain the phenomenon of problems experienced by students in understanding the concept of electricity. Research activities are carried out in the odd semester of the school year 2017/2018. The research subjects were students of class X in one of the private vocational schools in the city of Bandung which consisted of one class randomly selected. The results showed that the profile of affective ability which is a result of the representation of the value / energy-saving attitude of students in SMK S Bandung was still low. This can be seen from the average value of affective goals which include a willingness to respond, satisfaction in response, acceptance of a value, preference for a value, commitment, and conceptualisation of a value of 43.83 which is still in the low category. This shows that physics learning, especially on the concept of electricity at the SMK level has not been oriented towards affective goals.
E-mulsi: The digital module for pharmacy physics lab work
Authors: Dhina M A , Hadisoebroto G , Mubaroq S R , Puspa R V M , Deswati D A 
Published: December 2019

Abstract
Pharmacy Physics is a science that combines the knowledge of physics and pharmacy. The combination of them results in the preparation of an excellent standard pharmacy, significant effect, and it has a superb stabilization as well. Ideally, the practicum of the pharmacy physics has to be able to increase the knowledge from theory material and enhance the impetus to develop a particular understanding. The function of student’s practicum gets real proof from the concept that has studied so that the practicum activity should be able to take a role as a bridge between theory and real-world in daily activities. This research is attempting to create a particular application that is used for a learning tool when practicum’s education is happening in the pharmacy physics lab, named e-mulsi. An app that’s created web based aplication, so that it can be accessed by using any device that students have. The pattern that’s used to develop the application of e-mulsi is by using the method of the Software Development Life Cycle (SDLC) waterfall model. The effort of this design is hoped to give the alternative learning tool that’s suitable for the future development direction and capable of taking the benefits from the technology that’s still advancing, especially Industry’s revolution 4.0.
A study of radiation dose for the anticipated accident condition in the SAMOP reactor experimental facility
Authors: Salam M , Supriyatni E , Syarip S 
Published: December 2019

Abstract
A study of radiation dose for the accident condition in the Subcritical Assembly for 99Mo Production (SAMOP) reactor experimental facility has been done. The main purpose of this study is to estimate the radiation dose received by worker as well as society during accident condition in the SAMOP reactor experimental facility. In this study, one of the worst accident scenario that has the highest probability is postulated as one of TRIGA fuel fall down in to the SAMOP reactor core during loading-unloading process. That accident inflicts one of this TRIGA fuel broken and radioactive materials are released. The radiation dose is estimated based on the radioactive source-term from ORIGEN 2.1 computer code calculation. Furthermore, the total effective dose equivalent (TEDE) received by the society is calculated using dispersion model of Hotspot 3.0 computer code. From this study, the total radiation dose received by the radiation worker during this accident condition is 4.5 mSv and the maximum TEDE received by society during this accident condition is 0.031 mSv. This study proves that the radiation dose received by worker as well as society during this accident condition is still below the limit appointed by regulatory body (BAPETEN).
Analysis of fission product gas pressure and radioactivity in SAMOP reactor experimental facility
Authors: Syarip S , Wahyono P I , Budisantoso E T 
Published: December 2019

Abstract
The fission-product gas pressure and radioactivity analysis of a subcritical assembly for 99Mo production (SAMOP) experimental facility have been done. SAMOP reactor is fueled with low enriched uranyl nitrate solution UO2(NO3)2 of 300 g U/L, the reactor core is in the form an annular tube surrounded by a ring of fuel tubes. The SAMOP system is designed to be operated at 100 to 120 hours periodic operation per batch. The analysis method is done by using ORIGEN2 computer code, at the condition of the maximum fuel temperature of 54 °C, 120 hours reactor operating time, and neutron flux varied from 1010 to 1012 n/cm2s. The result show that the inventory of the gaseous fission products is dominantly consisted of the xenon, radium, helium, and tritium isotopes with the total activity of 1.3775x1013 Bq (372.29 Ci) and total gas volume of 0.0986 cm3 or giving a total gas pressure of 5.78 kPa. The isotopes of xenon and krypton are the major contributors to the total gas pressure. The analysis result shows that the gas pressure of the fission products is very small, therefore the pressure monitoring in the SAMOP reactor core is not necessary.