bluuebunny/crossref_metadata_2025_split huggingface dataset:
Decision support system for determining the activities of the study program using the Preference Selection Index
Authors: Puspitasari D , Wijaya I D , Mentari M 
Published: January 2020

Abstract
Each year the study program carries out activities that have been planned through departmental meetings. However, study program activities that are not on target will result in less accreditation scores. Accreditation is a government effort to guarantee the quality of educational institutions. The value of accreditation determines the main assets in the field of education, the quality of study programs and the feasibility of graduates. Therefore, this study tries to provide a ranking formula for study program activities based on the assessment of study program accreditation forms. The system is built using one of type multi-criteria decision making (MCDM), namely the Preference Selection Index (PSI). PSI method using statistical concepts until preference index as a reference for alternative ranking. This developed system can help the department to recommend the main activities that can be done to support the efforts of the study program in achieving optimal accreditation values. Finally, it was concluded that the PSI method is the right method for problems that require decision support with a large number of attributes, such as the criteria used in recommendations for study program activities that have been adapted to the study program accreditation form assessment matrix.
Developing a social media-based Chatbot for English learning
Authors: Sarosa M , Kusumawardani M , Suyono A , Wijaya M H 
Published: January 2020

Abstract
The increasing number of foreign companies offering job vacancies in Indonesia is a blessing for new graduates. However, they could not use the opportunity due to their limited English skill. This condition may occur because there is a lack of human resource providing direct, gradual, and continuous assistance to improve their English skills. Nowadays, social media are very popular among various groups of people but they are mostly used for information exchanges. This study aims to develop an application inside Facebook as an English learning media to help students learn English more efficiently. This application is in the form of a Chatbot (an answering robot) as a substitute for a teacher to help those who have difficulties in learning English. The Chatbot integrated in the social media is expected to provide an easier adoption as the users are already familiar with its interface and navigation. This application has been applied to students of Telkom Vocational High School Malang and D3 English Study Program, State Polytechnic of Malang. With this application, students can learn English independently and utilize a rich collection of information and organized exercise items to get help or find more challenges whenever needed to avoid learning boredom.
Dynamic simulation model of salt supply chain to increase farmers income
Authors: Muhandhis I , Susanto H , Asfari U 
Published: January 2020

Abstract
The average national salt production is around 2.5 million tons per year has not been able to meet domestic salt demands. One of the factors that caused this was the low incentives received by farmers so that farmers were reluctant to carry out production in the following year. As the main actor in the national salt industry, farmer’s welfare needs to be considered to ensure the sustainability of salt production. This study aims to develop a dynamic model of the salt production supply chain by identifying internal and external factors that influence the system. We use system dynamic methods because this framework can model nonlinear equations among variables and can represent feedbacks loop relationships. From the base model simulation results, we developed a scenario to improve the welfare of salt farmers. By using the scenario of land intensification with filtering – threaded technology, geomembrane, and tunnel system, farmer’s profits could be increased up to Rp 13,830,300 per ha per season in the shortest dry season.
The effect of implementing E-cooperative on process speed, ease of operation, and cost efficiency
Authors: Purwokoaji D K , Rahmat C , Astiningrum M 
Published: January 2020

Abstract
The Industrial Revolution 4.0 in Indonesia is inevitable, and to deal with Society 5.0 which emphasizes excellent service equal to five stars, it is necessary to immediately implement information systems and information technology to the Indonesian people in general, so that government policies based on TOP-BOTTOM can be accelerated by incorporating a BOTTOM approach - UP The general method of this research is the study of literature, the design and analysis of systems and the implementation of empirical research in functional testing and user testing. The population was selected from cooperative members who had conducted online transactions totaling 268 people, and those who filled out and returned questionnaire entries totaling 172 people, the data was then processed using a structured equation model using the LISREL application. The result is that e-cooperative adoption affects process speed, ease of operation, and cost efficiency, both in partial and multiple correlations.
Development of decision support system for subsidized electricity purchase using Naive Bayes method to improve company reputation (Case study in PT. PLN (Persero) Malang)
Authors: Nurtjahjani F , Basuki R S , Pribadi J D , Batubulan K S , Suryadi S B 
Published: January 2020

Abstract
Nowadays there are a lot of customers who are categorized as capable households (Rumah Tangga Mampu). The problem is, electricity rates increased to IDR 1,352,00/KWH for customers with average capacity (900 Volt Ampere). Central government spending the proportion of electricity subsidies tends to rocketed up from 2.5% in 2005 to 4.7% in 2012 APBN. For average electricity subsidies consume around 7% of central government spending. This condition shows that electricity subsidies are quite burdensome to the central government budget (Biro Analisa Anggaran dan Pelaksanaan APBN-Sekjen DPR-RI). Problems related to electricity consumed for the national industry gives impact on fluctuations in subsidies and inefficiencies at PT PLN require a comprehensive solution. In implementing the electricity subsidy distribution program that is right on target and foster the performance of PT. PLN in charge, it is necessary to hold a new breakthrough based on technology by creating a systemized system for new registration and re-registration for electricity consumers by bringing the data that has been determined by PT PLN. Next, the consumers will be trained to accessthe system to determine whether the consumer is eligible for subsidies or not. To overcome the problem the system is proposed the solution through the implementation of Naive Bayes. Based on the result, the system is feasible tocategorizefor whom the customer get subsidized electricity rate or not. The precise objectives and the system are able to improve the accuracy in selecting consumer tariff subsidy of electricity to the consumer the right target for PT PLN.
Forecasting the number of Politeknik Negeri Malang new student’s enrolment using single exponential smoothing method
Authors: Amalia E L , Wibowo D W , Ulfa F , Ikawati D S E 
Published: January 2020

Abstract
Forecasting the number of new student enrolments at Politeknik Negeri Malang offers the campus a good help to discover new innovations and good marketing strategies. Besides, it can be used as a reference in planning the teaching and learning process. This study used the Single Exponential Smoothing method as a forecasting method. Forecasting accuracy uses Mean Absolute Deviation (MAD), Mean Square Error (MSE), and Mean Absolute Percentage Error (MAPE). Based on the calculation results, the smoothing constant result is α = 0.9 which means it has the smallest error values for the three forecasting accuracy calculation methods.
Passenger volume forecasting information system for PT. KAI Daop 2 Bandung using double exponential smoothing method
Authors: Amalia E L , Harijanto B , Santoso A 
Published: January 2020

Abstract
Daop 2 Bandung is one of the Indonesian railroad operations areas, under the administration of PT Kereta Api Indonesia (Persero). Daop 2 Bandung is currently experiencing a problem in predicting the number of passenger volumes. It is common for railway transportation services to experience passengers flows that increases or decreases in the volume which in turn causes the service of the PT. KAI becomes less optimum. Therefore, a forecasting information system is needed to forecast the volume of train passengers in the upcoming period. This study applied Double Exponential Smoothing method as a forecasting method. The data used is the number of passenger volume data for two periods, i.e. 2017 and 2018 periods. For forecasting accuracy, PE (Percentage Error) and MAPE (Mean Absolute Percentage Error) were used. The passenger volume forecasting results on the Executive Class category shows 946,824 with an error percentage of 11.9962%, the Business Class category shows 221,188 results with an error percentage of 21.6714%, and the Economy Class category shows 5,144,074 with an error percentage of 10.4366%.
The effect of distance Base Transceiver Station (BTS) on speed of vehicle safety response based on internet of things
Authors: Martawati M E , Rohman F , Kurniawan H F D , Abidin I N 
Published: January 2020

Abstract
In 2018 the Central of Statistics recorded cases of theft of motorized vehicles and embezzled cars from rentals totalling 2.752 cases, this was due to inadequate safety systems on the vehicle, and there were also several vehicles from vehicle rental services that had used GPS technology (Global Positioning System) which is integrated with the SMS gateway system (Short Message Service) to control the vehicle remotely, but in that system it has many disadvantages such as low speed of time response to turning off the vehicle and requires a large microcontroller memory because it has to store SMS messages and requires resetting in a certain period. The purpose of the study is to build a system in real-time by utilizing the latest technology, namely the Internet of Things so that vehicle owners can easily monitor and control their vehicles through the internet. The method of data analysis uses Anova two-way factor without replication. Data retrieval is done by varying the distance of the BTS and the type of provider to determine the accuracy and speed of response of the vehicle. The result of the study shows that Ublox neo 6M GPS can detect more accurately with Telkomsel Simpati providers with an average distance of 7,6184 meters and for the speed of response of vehicle control remotely Telkomsel Simpati provider with an average of 1,3334 seconds faster and stable.
The effect of pH upon corrosion rate of aircraft component type MD 80 on fuselage part
Authors: Suhartaya N U C , Rochmadi R 
Published: January 2020

Abstract
Indonesia as one of the archipelagic countries with 16,055 islands and has been registered with PBB certainly requires transportation facilities that can reach all areas of the country. The most efficient and effective mode of transportation to reach all islands in Indonesia is aircraft. Along with the increasing number of users it will increase the number of requests in the level of comfort and safety of passengers one of which is in the feasibility of an aircraft. This research aims to study the effect of pH upon corrosion rate of aircraft metal material type of MD 80 on fuselage part. This study employed pH at 3.4; 3.8; 4.4; 4.8; 5.4; 5.8; 6.1; 7.5; and 12 at fixed temperature of 30°C. Weight loss of aircraft metal material were measured once every 1 hour. The results of this study conclude that the effect of pH upon corrosion rate of aircraft type MD 80 metal material on the fuselage part at a fixed temperature of 30°C in a span of 12 hours showed less significant results. This might be due to the corrosion rate of aircraft metal components running very slowly so that in the span of 12 hours, no significant results were obtained.
Design of permanent magnet motor
Authors: Susilo S H , Jannah Z , Mustofa L D , Effendhi Y 
Published: January 2020

Abstract
The increasing energy demand is in line with population growth as well as the development of science and technology, and the maximum utilization of energy derived from magnets. The purpose of this research is to design of permanent magnet motor that produces rotation that can be utilized as power plant propulsion, without using fuel oil. The method used is to examine and search the gap of existing patent design and develop it in the form of a new design, In the hope of increasing the potential of magnetic energy into a magnetic power plant. By designing the magnetic position and angle of attack on the rotor and stator motor magnet.
Numerical studies on furnace water walls failure in water tube boiler applications
Authors: Zainuri A M , Patma T S , Setiawan A 
Published: January 2020

Abstract
Boiler as one of the main equipment in steam power plant system that has important function as steam generation for rotating turbine. Failure of boiler result in operational cause lowering the power capacity of the steam power plant system on the whole. From the data observation, boiler failure frequencies because of leakage on boiler tubes. To analyze the boiler tube failure accurately, information of temperature operated on the outer surface tube and temperature distribution on the furnace wall are needed. The main objective of this study is to investigate several areas in which the failure of furnace water walls boiler exists. A combined analysis of thermal and strength of material has been performed, in order to calculate the temperature and velocity fields inside furnace of the water tube boiler. Due to the geometrical complexity of the model, GAMBIT applications was used to generate a computer-based model. All numerical calculations have been performed using the commercial CFD package FLUENT. The results obtained were numerically that failure on furnace water walls in water tube boiler because there is localized overheating.
Simulation study of Savonius tandem blade wind turbine using an adjustable deflector
Authors: Adiwidodo S , Wahyudi B , Yudiyanto E , Subagiyo S , Hartono M , Baananto F 
Published: January 2020

Abstract
The conventional Savonius wind turbine has two inverted cylindrical blades, it can indeed receive fluid impulses from all horizontal directions and produce a greater drag force than other wind turbines. The weakness of Savonius is the resistance in one blade side. Efforts to improve that has been done is to add a blade that serves to increase the local velocity of fluid flow to resist the resistance which is termed Savonius tandem blade (STB). This research was conducted to further reduce the resistance value of one side STB with the addition of an adjustable deflector. The purpose of this study is to obtain information on changes in the torque of the STB wind turbine on variations in the deflector angle and stream velocity. The research method used is numerical simulation using CFD software. A two-dimensional view of the rotor model using deflector was considered. The deflector angle varies start from 15 degrees with an increase also every 15 degrees until the torque decreased. The CFD simulation show there is a significant increase in torque with the addition of a deflector. Maximum torque is not achieved at one deflector angle value but is also influenced by stream velocity. At higher stream velocity there is a tendency to reach the maximum torque required larger deflector angle. Then at a certain point, the torque will decrease when the deflector angle is enlarged.
Testing of the ability of fatigue test machine prototype and fatigue test for nylon and cast iron specimens
Authors: Hadi S , Murdani A , Sudarmadji S , Artiko A 
Published: January 2020

Abstract
Fatigue life prediction for engineering material is important for predictive maintenance to support accident prevention in a high-risk equipment. The study aims to determine the ability of the machine prototype of rotating bending type fatigue test and to find out the fatigue life of Nylon and cast iron specimens. By knowing the fatigue life of a plastic and ferrous metal material, the prediction of fatigue life can be applied to a maintenance plan. The design and manufacture of rotating bending fatigue testing machines equipped with copy turning devices can be used to prepare specimens from plastic/soft metal materials, thus becoming an integrated fatigue test machine. The method used includes determining the standard size of fatigue test specimens, turning various fatigue test specimens, carrying out fatigue test specimens of nylon and cast iron materials, and analyzing the results of fatigue tests. The test results of the fatigue test machine prototype showed the ability to turn plastic and soft metal materials, and the fatigue life for Nylon 6.6 ranging from 659 to 13216 rotation for breaking the specimens at 229 to 26 MPa stresses, and for cast iron from 142 to 22863 rotation at 229 to 147 MPa stresses.
Design and analysis of planar wideband monopole antenna using WIPL-D simulator
Authors: Rohadi E , Sarosa M , Ali M F , Amalia A , Setyawan A , Adhisuwignjo S 
Published: January 2020

Abstract
One of the problems that correspond to the small dimension of an antenna is the bandwidth. In order to overcome the problem from small linear and multiple antenna array systems, the investigation of the antenna elements is needed. The design of planar antennas is to achieve an antenna that is able to match various demands in applications where size, cost, performance, and aerodynamic profiles are very important considerations, a low-profile antenna such as a small. The antenna performance on scattering parameters S11, gain, return loss and impedance input are investigated at obtaining wideband antennas by adjusting antenna design parameters. The substrate thickness needs to be adjusted to 0.813 mm, and the element length at 2 mm and 0.75 mm. The calculation of VSWR, gain, and the radiation pattern is presented using MoM-based WIPL-D. The antenna element when x2 is 2mm in the frequency range 4 GHz – 8 GHz, which this antenna works best on element dimension x2= 1.5mm when the frequency resonance 4.86 GHz and VSWR value is 1. The main advantages of this antenna are the dimension and simple design.
Design and implementation of centralized reading system on analog postpaid water meter
Authors: Hudiono H , Taufik M , Perdana R H Y , Rohmah W R 
Published: January 2020

Abstract
Local water supply company in Indonesia still uses analog water meter, hence the data recording of customer’ water usage was carried out by officers manually. It is certainly an inefficient and risky method that could produce errors. Moreover, not all water meter data could be recorded at the time officers come to the location, for example in vacant houses, that could causing customers suffer the consequences such as fine for late payment. In this study, we proposed a new water meter reading system design which contains a conversion device that could convert analog water usage data into the digital one, installed in existing analog meter. The converted data would be transmitted to local concentrator using a 433 MHz wireless transceiver network and sent to the server that acts as monitoring center via cellular networks. The process of digitizing the water meter does not need to be done by replacing the existing analog water meters. Thus, the investment costs of the water meter digitalization process would be relatively cheaper and it could be a solution for increasing the recording efficiency and accuracy of customer’s water usage data.
Monitoring system water pH rate, turbidity, and temperature of river water
Authors: Aziz F A , Sarosa M , Rohadi E 
Published: January 2020

Abstract
Water is a substance that is important in life after air if it has been polluted by chemicals it is very dangerous for living things. The development of the industry uses chemicals in a production that causes hazardous waste, even though it has been reprocessed in the filtering process, if it is less than perfect, the water will be polluted if disposed of in the river flow. Identification and monitoring measures are needed that require media to use a device that includes a sensor containing the pH of water that comes from the content of acidic substances in water, turbidity or the content of solid objects in the water, and water temperature. The data collection method uses a nodeMCU microcontroller. Then the data is sent via a wireless connection to be stored on the database server. Testing to see the results of monitoring using an Android application that is connected to the server. From the results, it can be concluded that the data displayed on the application can run smoothly, the value displayed can be seen in real-time.
Observation of greenhouse condition based on wireless sensor networks
Authors: Darmono H , Perdana R H Y , Puspitasari W 
Published: January 2020

Abstract
Along with increasing years, meeting food needs in Indonesia continues to experience improvements. This is because it is not balanced between the rate of population growth and the amount of food production. In order to help increase food production and improve the quality of food, modern technology in agriculture is needed, one of which is a greenhouse. Most greenhouses still use manual watering systems that have not been supported by technology that utilizes an automatic watering system and is accompanied by a monitoring system, temperature and humidity control and greenhouse soil moisture using wireless sensor network communications. By spreading 6 nodes at each point and each node equipped with 3 sensors, it is expected that the greenhouse monitoring and control process will be more thorough. The results of temperature testing at the greenhouse before using the wireless sensor network and after being implemented have increased by 23%. This also applies to the value of air humidity has increased by 4% and soil moisture by 1.20%.
Development of camlearn as mobile learning media for photography equipment course
Authors: Hidayat W N , Oktaviani A T , Setiani A , Sugestuwandeli A , Sutikno T A 
Published: January 2020

Abstract
Limited learning facilities in vocational high schools is one of the problems in vocational education. Not every schools with multimedia department have enough standard cameras. The solution and also the goal of this research is to discuss the development of Camlearn as mobile learning media that can be used in the multimedia department. Camlearn is an android-based mobile application that discusses the types of cameras and photography equipment. This research applies the steps of ADDIE research method including Analyze, Design, Development, Implementation, and Evaluation. Analysis, design and development activities are based on material requirements analysis that has been carried out using a questionnaire and interview methods for students, teachers and vice-principals of curriculum with a Likert Scale consisting of three research variables namely material aspects, media aspects, and application functionality. The results of the application product feasibility on the material suitability aspects are 80%, the media conformity aspects are 82%, and the product functionality aspects are 82%. Based on the results of the product development testing, it can be concluded that this research product has met the minimum eligibility test so that it can be declared feasible to be used as a learning media in the learning process.