bluuebunny/crossref_metadata_2025_split huggingface dataset:
Cigarette detection system in closed rooms based on Internet of Thing (IoT)
Authors: Sulistiyowati I , Findawati Y , Ayubi S K A , Jamaaluddin J , Sulistyanto M P T 
Published: December 2019

Abstract
Detection of cigarette smoke is very necessary to increase the level of comfort in a closed room. By implementing an Internet of Thing system in detecting cigarette smoke in the room, making it easier to monitor and control it via a smartphone. In this system, the MQ-2 sensor is used to detect cigarette smoke in the room, the NodemCu microcontroller as a data processor received from the sensor, the buzzer as an indicator sound and the blynk application to display notifications if the room is detected by cigarette smoke. The sensitivity level of the MQ-2 sensor is strongly influenced by the distance of the source of cigarette smoke with the sensor. The use of the internet of thing system affects the signal strength and network on the user’s smartphone which results in a delay when sending notifications. Therefore, a good internet network is needed. The use of IoT technology in detecting cigarette smoke in a room will be an alternative solution to increase the level of security and comfort in a closed room.
Sound indicators as safety of motorcycle
Authors: Ahfas A , Hadidjaja D , Syahrorini S , Wicaksono A 
Published: December 2019

Abstract
Motorbikes are popular of transportation with high usage rates. Safeguarding motorbikes are a necessity for users to provide security. Researchers offer motorcycle safety using sound indicators. The working principle of motorcycle safety offered, is after the main key, or contact is in position and the Mic sound indicator is blown, amplifier circuit works to drive the relay driver that connects the CDI unit. The motorcycle safety circuit system will live and if there is no blow, the motorcycle safety circuit will not function. Research on the motorcycle safety circuit can be used to input indicator sound. Components needed include Mic condenser, driver relay circuit, power supply. Measurement of the relay driver circuit and condenser mic aims to find out which circuit can work as planned. The measurement results obtained testing the motorcycle safety circuit with the following explanation: When the sound indicator and driver get a touch simultaneously, which gives a signal that the signal from the sound indicator is connected to the amplifier driver, so that the signal is detected, will provide input to the relay (on) and CDI unit when the motorcycle will work. With an indication the LED will turn on.
Design and development equipment to measure the motion quantities of an object that moving in air or in fluid
Authors: Marpaung M A , Handoko E , Delina M 
Published: December 2019

Abstract
We have developed an equipment for time interval measurement of an object that move free fall in air or in water by using microprocessor Arduino as a clock timer and is controlled by pair of laser diode and photo diode. By this technique, the main problem how to find the equation of motion can be obtained. The results show that the equipment work well. The equipment is able to measure time interval of an object that move free fall in air or in water which position change up to 10 cm. By positioning the pair of laser diode and photo diode in six different heights we can plot the position as a function of time. By the aid of a personal computer software it is easily to obtain the equation of motion of the object move both in air or in water. This equipment is useful for high school and under graduate university student to measure the gravity intensity and to study the drag force in fluid.
Optimization design of CAI for computer programming language to improve student’s competence
Authors: Sukardjo M , Sugiyanta L , Supriyanto Y 
Published: December 2019

Abstract
Computer Assisted Instruction (CAI) for computer programming was rare in order to improve student’s competence, the general design of CAI should be optimized. Optimized design produced proper CAI learning media targeted for vocational high school (SMK). The product implemented In certain SMK to verify the effectiveness and efficiency of learning media in the field. The research used R and D method. The study population was all students of Vocational High School class IX. The results of this study are that the use of CAI can improve student learning outcomes for mass production planning material using the VB.net programming language.
Steering control design and simulation of hybrid underwater glider
Authors: Latifah A , Fatimah D D S , Hakim B L , Mauluddin Y 
Published: December 2019

Abstract
A new class of autonomous underwater vehicle (AUV) is a hybrid underwater glider (HUG) that integrates buoyancy engine and propeller as the main actuator. This kind of vehicle has multi-mode to act that is glider and AUV mode that derive to the mathematical model for the longitudinal and lateral plane. To design steer control of HUG, the mathematical model derives to a linear equation, and the variable controller is rudder for yaw control and main thruster for speed control of HUG. The method of control design is Proportional, Integral and Derivative (PID), there is PD for yaw controller and P for speed controller that are simulated using MATLAB/Simulink to get a response so that we can verify the dynamic model for steering control using waypoint desire. The results demonstrate dynamic response for the lateral plane over waypoint on the surfaces of water.
Glidding system for a fixed wing aircraft using PID control algorithm
Authors: Setiawan B , Widiatmoko D , Siradjuddin I , Adhisuwignjo S , Ronilaya F , Syafaat M 
Published: December 2019

Abstract
In every Unmanned Aerial Vehicle (UAV) task, the power supply used is limited. UAVs are often forced to land when the battery runs out before the mission is completed. The gliding controller is proposed in this paper so that Fixed Wing Aircraft (FWA) can fly with minimal power and can adjust direction, altitude, zero pitch and zero roll stability. The FWA uses a Barometric Pressure Measure (BMP) 180 sensor at the tip of the wing to detect the difference in pressure experienced by both wings, therefore, the direction of the wind can be determined. The information of the wind direction was then used to maintain the desired altitude of the FWA. The Proportional Integral Derivative (PID) control algorithm was implemented to stabilize the FWA altitude to keep cruising or flying in a flat position. Real-time experiments using FWA have been conducted. It can be observed that the FWA was able to air with automatic glider mode for almost 2 minutes. Tests carried out include altitude data, roll and pitch movement from BMP180 sensor readings, the glidding performance has been observed with respect to the altitude, roll and pitch errors. It was measured that the altitude, the roll and the pitch errors were 1.74%, 0.23% and 0.34%, respectively.
PID controller for a differential drive robot balancing system
Authors: Siradjuddin I , Syafaat M , Patma T S , Adhisuwignjo S , Winarno T , Komarudin A , Widiatmoko D 
Published: December 2019

Abstract
Controlling a differential drive robot balancing system is a challenging task since it is highly unstable, non-linear and under-actuated system. This paper proposes a PID controller algorithm to balance a differential drive robot at upright position. The system model derived using Lagrangian method is discussed. The resulting mathematical model of the proposed closed-loop system was simulated. To verify the system performances, the real time experiments have been conducted. An Arduino Uno and an MPU6050 were used as the main controller and the main sensor, respectively. The PID parameters were manually tuned until the desired performance was achieved. From the simulation and the real time experiment results, the proposed method has demonstrated its capability to stabilize robot at upright position.
Designing, implementing and analysing optimal controllers on a non-linear reaction wheel pendulum
Authors: Siradjuddin I , Pradani E R K , Rohadi E , Adhisuwignjo S , Kusumawardani M , Fitriani I M 
Published: December 2019

Abstract
This paper discusses a reaction wheel control system. A reaction wheel pendulum is good example of a non-linear and underactuated system, which attracts control system researchers to develop many control algorithms. The reaction wheel plant is usually used for studying advanced control system courses. In this paper, a mathematical model of the state space is discussing. A proposed LQR control algorithm is explained. Simulation and real time experiments have seen carried out to verify the performance of the proposed closed loop system. The LQR optimisation algorithm was able to find the optimum feedback gains. The simulation and real time experiments show that the reaction wheel pendulum could stabilize the pendulum at upright position.
Android-based Indonesian sign language model using robot hand
Authors: Taryudi T , Yuliatmojo P , Paripurna M A 
Published: December 2019

Abstract
Sign language is one of the most effective ways to communicate with deaf people. However, not everyone is able to use sign language. Therefore, in this study, a sign language display system was created using a hand robot that was moved through an Android-based application on a smartphone to overcome this problem. The design and development of the system begin from the manufacture of hardware consisting of one hand robot with 11 servo motors as the actuators, the Arduino Mega 2560 microcontroller as the main controller and a Bluetooth module for wireless communication between hand robot and smartphone. Then software development is carried out on the hand robot controller and android based application on a smartphone. Furthermore, system testing is carried out by validating the results of the letters and numbers shown by hand robot with gestures in the Indonesian Language Signalling System Dictionary (SIBI). The results show that the hand robot has been able to display letters and numbers according to the instructions given by an Android-based application on a smartphone with an 80% accuracy rate.
Modified cooperative learning methods in teaching computer programming laboratory course for electronics engineering students
Authors: Parastiwi A , Ekojono E , Rahmanto A N 
Published: December 2019

Abstract
Modified cooperative learning is a class-based active learning strategy, where students work on problems posed by lecturers, first individually, then in small groups, and finally as class discussions. This method allows students to express their reasoning, reflect on their thoughts, and get immediate feedback about their understanding. In this study, an investigation of the quantity and quality of student involvement was conducted in the Computer Programming Laboratory course in the electronics engineering department. Lecture material is prepared to support cooperative learning as well as class observations of students conducted by cooperative learning in the course. The pattern of student involvement was observed using the student behaviour observation form that was developed and validated. Data triangulation was done with student perception survey data. The results showed that matching timing varied depending on the topic with an average of 20 minutes for the concept presentation by the lecturer. Student involvement is very high in the form of writing and discussing groups and classes. Triangulation of student perceptions states that students feel actively involved fully in the learning process.
Efficiency analysis of refrigerant work fluid in the Organic Rankine Cycle (ORC) as an energy generating machine electricity 1 kW scale
Authors: Abdullah M Y , Prabowo P , Sudarmanta B 
Published: December 2019

Abstract
At present, the depletion of fossil energy resources will have a significant impact on every aspect of life in Indonesia. One effort to overcome this problem is by conducting research to look for renewable energy sources. This study uses the Organic Rankine Cycle (ORC). The types of refrigerants used in this study are R141b, R245fa, and R123 using the Aspen plus Program Simulation. This study focuses on the working fluid R141b, R245fa, and R123 on the ORC as a 1 kW scale electric energy generator. The results obtained from the Aspen Plus Program Simulation in the ORC Cycle use working fluids R141b, R245fa, and R123 at a pressure of 3 bar to a pressure of 10 bar at a temperature of 95 ° C. The maximum efficiency produced is 8.65%, 7.79%, and 8.36%. The turbine power produced is 1005 watts, 896 watts, and 770 watts. From the simulation results used in the ORC working fluid R 141b has an Efficiency and Power value that is best used as a 1 kW electric energy generator with an efficiency value of 8.65% and 1005 Watt Power.
Comparison of predictive performance and measurement of off-grid 15 kWp solar power generation in Aceh Tamiang
Authors: Thaib R , Rizal S , Rizal T A 
Published: December 2019

Abstract
In 2015, the Government, through a special allocation fund, has finished constructing an off-grid 15 KWp off-grid solar power plant in Paya Tampah Village, Aceh Tamiang district. The long-term reliability of solar power plants is highly reliant on on-site measurements because of the vagueness in some of the constantly-changing variables such as irradiation, drought rate, which possibly lead to cause significant power losses and which turn out to also affect the estimated cost of PV (kWh). With the aim of upgrading capabilities in off-grid solar power plant planning especially in the province of Aceh, this paper outlining detailed comparison of the results of calculating the performance of off-grid 15 KWp off-grid solar power among system performance measurement results after 2 years of operation. Performance calculations performed with the assistant of PVsyst software. The measurement results characterize the total power generated by the off-grid solar power plant is 15 kWp and used by 38 households. The result of this investigation is expected to be used by local governments to be a benchmark on the future planned off-grid solar power plant planning.
Utilization of Beeswax/Bentonite as energy storage material on building wall composite
Authors: Thaib R , Hamdani H , Amin M 
Published: December 2019

Abstract
The combination of building materials and PCM is an efficient way to increase thermal energy storage capacity in building components. In this study, a study of the use of beeswax/bentonite PCM on the concrete walls of the building had been carried out. This investigation intended to ascertain the amount of concrete compressive strength if coarse aggregates were replaced in part by PCM beeswax/bentonite. The use of PCM-beeswax in the concrete has not been able to increase the strength of concrete. Even worse, their existence proof to decreased the compressive strength of PCM mixture concrete. Heat absorption test shows that PCM beeswax/bentonite is capable of decreasing the concrete temperature up to 6,67% compared to concrete without PCM. It also means that the PCM proposed in this study shows great potential for application as a phase change material in lightweight concrete.
Effect of pulley primary angle variation and roller 11 grams on 110 cc Scoopy injection engine
Authors: Widodo E , Mulyadi M , Iswanto I , Tjahjanti P H , Anggara S B M 
Published: December 2019

Abstract
Transmission automatic or known as (CVT) is a transmission that makes us feel comfortable because we only need to pull the gas without moving the transmission because the transmission is automatic. Automatic motors not only make driving easier but also facilitate the maintenance of the transmission. However, among racing motorbike lovers, this automatic transmission type motor is lacking in power. So, it needs to be modified to the CVT component to improve the performance of the machine. To improve this performance, we analyze pulley and standard roller manufacturers and primary pulleys with 3 kinds of pulley, namely standard angles of 14°, 13°, 12° and roller 11 gram variations to determine the comparison of Performa (horse power and torque). To find out the comparison of the test, we do the test using the Dyno test. From the test results, 13° pulley and 11 gram roller have increased significantly compared to standard 14° and 13 gram roller standard pulleys. This can be seen from the results of an increase in horse power and torque when using pulley 13° and 11 grams roller can be obtained on the highest horse power (Hp) at 3246 rpm, which is the highest 9.0 hp and torque (Nm) at the engine speed 2087 rpm which is 22.16 Nm. While the standard pulley of the factory is 14° and the standard 13 grams roller can be seen the highest horse power (Hp) at 3923 rpm round, which is 7.8 Hp and the highest Torque (Nm) at 2972 rpm engine speed which is 16.99 Nm. then from the results of this test analysis has increased horse power 1.2 hp and torque of 5.17 Nm.
Infill pattern and density effects on the tensile properties of 3D printed PLA material
Authors: Rismalia M , Hidajat S C , Permana I G R , Hadisujoto B , Muslimin M , Triawan F 
Published: December 2019

Abstract
Additive manufacturing such as 3D printing is considered as a highly convenient manufacturing process since it enables to create any 3D objects. It is known that different materials, printing techniques, and printing parameters are affecting the mechanical properties of the printed objects. However, studies on the mechanical properties of the 3D printed structure are still limited. In this work, investigation of the relationship between two printing parameters, i.e. infill pattern and infill density were conducted on the Polylactic Acid (PLA) material. Three infill densities, 25%, 50%, and 75%, and three infill patterns, grid, tri-hexagon, and concentric, were chosen. The tensile test, ASTM D638, was employed to obtain the material properties based on these two printing parameters. An open-source 3D printing slicer software, Cura, was used to manufacture the tensile specimens. The Young’s modulus, yield strength, and ultimate strength were recorded and examined. The results showed that the tensile properties increase as infill density increases. Of the three-printing pattern, the concentric has the highest values of tensile properties regardless of the infill densities. This finding can be used as a reference for creating a finite element model (FEM) as well as predicting the optimum tensile properties with respect to the printing parameters.
The effect of blade angle on two-stage water turbine against power and efficiency
Authors: Haryono D A , Fahruddin A , Akbar A , Mulyadi M 
Published: December 2019

Abstract
The Indonesian region has abundant alternative energy sources that can be used to meet electrical energy needs. One potential alternative energy source is water energy that can be converted into electrical energy with a water turbine. Water turbines are generally one stage, whereas water energy on the output side is still quite large. In this study, experiments were made using a two-stage micro water turbine model with blade angle variations on the second stage turbine. The type of turbine used in this study is a crossflow turbine with a vertical shaft. The results show that the 45˚ blade angle on the second stage turbine can increase the second stage turbine rotational speed, and also increase the power of second stage turbine. The total power of the turbine increases up to 29% compared to 15˚ blade angle. This indicates that the appropriate selection of the second stage turbine blade angle will significantly affect the total turbine power and its efficiency.
High-pressurizing green algae in third generation bioethanol production
Authors: Aditiya H B , Theofany H C , Yheni M 
Published: December 2019

Abstract
The effects of fossil fuel combustion are famously concerning. 70% of the global production of carbon monoxide is accounted from transportation sector; the sector in which fossil fuel is popularly being continuously used. As one alternative fuel, bioethanol is a renewable fuel which have attracted many researchers in the pursuit of lowering dependency on fossil fuel and its negative effects to the environment. In third generation bioethanol production, green algae are deemed to carry high potential as the feedstock due to its ampleness, especially in a tropical country such as Indonesia. In this study the ability to produce simple sugars of green algae was observed through high-pressurization treatment. Different treatment pressures were achieved through varying temperature set in the autoclave: 110 and 130oC. The recorded pressure was up to about 180 kPa gage, and this treatment was also compared with non-pressurizing production method. Samples were analysed for reducing sugars content through DNS method. Since simple sugars are essential in the fermentation stage, the produced sugars from green algae are the indication of potential as the feedstock in bioethanol production. The impact of this study supports the progress of fossil fuel-to-biofuel scheme in Indonesia, and the outcome from this preliminary study can be used as the reference for further studies.
Microwave irradiation pre-treatment in third generation bioethanol production from tropical green algae
Authors: Theofany H C , Yheni M , Aditiya H B , Sepwin N S 
Published: December 2019

Abstract
Through centuries the side effect of the massively growing of population is the energy demand and consumption. As a result of this, the world energy used from the non-renewable fossil fuel has reached 80%. To counter this, researchers have found alternatives for this fossil fuel; and bioethanol is one of the alternative and sustainable options. One source of bioethanol that is believed carrying high production potential is photosynthetic algae or green algae. In this study, Chlorophyta (Green Algae) was hydrolyzed using microwave irradiation. Operation Mode (OM) was varied to observe its effect during the hydrolysis stage. Further, hydrolysis time (t) was also selected as the variable in this study to examine the result of reducing sugar. From the result of this experiment, it is projected that the sugar produced from hydrolysis assisted by microwave irradiation would bring a high-quality bioethanol production. Also, from this study, it would exhibit the great potential of bioethanol from green algae as the fossil fuel substitute in order to create a more sustainable and environmentally friendly energy source.
Finite element analysis of Miura origami column under uniaxial compressive load
Authors: Hidajat S C , Permana I G R , Rismalia M , Herianto  , Triawan F 
Published: December 2019

Abstract
This paper presents the finite element analysis (FEA) of 3D printed Miura origami column under uniaxial compressive loading condition. The finite element model (FEM) was developed under elastic-perfectly plastic material model. Investigation on the yield strength and compressive modulus with two varied parameters, i.e. angle and thickness of the Miura origami column was conducted. Abaqus 6.14 software was used to conduct the simulation of compression test. The simulation result is then compared with and examined to the referred experimental data. From the simulation, it was revealed that the results from FEA of Miura-ori column with θ = 90° and t = 2 mm showed good agreement with the referred experimental data. However, FEA results mostly overestimates the mechanical properties. This discrepancy could be due to the existence of imperfections and anisotropic material of 3D printed structures.