bluuebunny/crossref_metadata_2025_split huggingface dataset:
Design of big data technology prototype for classification of village status based on village development index involves k-means algorithm to support village ministry Pdtt work programs
Authors: Hasugian Paska Marto , Hutahaean Harvei Desmon , Sinaga Bosker , Sriadhi  , Silaban Saronom 
Published: March 2021

Abstract
Big data technology is the overall technology that can handle the processing associated with analyzing the data to explore the potential that is in it. Some of the uses of big data are based on the biggest data traffic sources, such as social media, financial transactions, public data, censorship data, and company data. The problem found in the accumulation of village status data that has not been utilized in the decision-making process to determine the status of the next village and the absence of an application to process the data stored in the data database so that a tool is developed to analyze the buildup. The results of this study are to produce a prototype design that is Unified Modeling Language (UML) design, Form Design, and Database Design that will be used to develop Big Data Technology in determining the classification of village status based on the Village Build index.
Feasibility Analysis Test of Computer Based Testing (CBT) System for General Physics Exam
Authors: Abubakar  , Tanjung Yulifda , Wulandari Dewi 
Published: March 2021

Abstract
This study aims to develop and to test the feasibility of Computer Based Testing (CBT) system for General Physics courses that can be used as a media to measure the ability of student. This research involves a part of Research and Development (R & D) for developing CBT product and also descriptive research for qualitative and quantitative data processing. The collected data as a result of assessment are validated by a team who are experts in analyzing qualitatively and quantitatively. The procedure of implementation consists of three stages, namely preparation, implementation and final stages. In the preparation stage, the CBT system is accommodated in preparing application and all items. In the implementation stage, the feasibility test is conducted through an assessment supported by IT Expert Team. In the final stage, the assessment results of the IT Expert Team are used as a basis for evaluating the CBT system. As result, the Computer Based Testing (CBT) system has fulfilled the criteria of question eligibility through content validity testing with aspects of matter, construction and language. The average value is 75.6 that satisfy valid criteria with minor revisions as well as satisfy eligibility system which includes Content, Interface, Navigation and Security indicators with the percentage is 86.6% involving the category of the level of eligibility which is in very good level. Thus, it can be used as a medium for student exams in the General Physics course.
Development Environment of Machine Learning for Image Classification
Authors: Tarigan Irwan Jani , Sihombing Poltak , Sirait Pahala 
Published: March 2021

Abstract
Machine learning is an interesting topic nowadays, it is also a subarea of artificial intelligence. An interesting thing that needs to be done in the beginning is how to configure the Development Environment (DE). In this paper, DE is configured using Acer-Notebook with jupyter notebook and Smartphone with google colab for image classification using convolution neural network method. The configuration process is easier to do on Smartphone Realme-C2 than Acer-Notebook and the best level of accuracy is epoch 100 in training and testing data obtained by Smartphone Realme-C2 are 0.70 and 0.66, while Acer-Notebook is 0.70 and 0.63.
Effectiveness of typha latifolia for phytoremediation of cadmium in acid mine drainage
Authors: Putri Maharani Permata , Moersidik Setyo Sarwanto 
Published: March 2021

Abstract
One evidence of environmental pollution is the formation of acid mine drainage. In passive processing systems, the technique that is often used is phytoremediation because the costs incurred for this method are affordable and take advantage of natural ecosystems. In this study, the effectiveness of Typha latifoliain neutralizing acidity and removing heavy metal such as cadmium (Cd) is determined. Cadmium is one of the heavy metals that can be found in nickel, gold, and copper mining area. The acid mine drainage used in this study was artificially made with a concentration of 5and 10 mg/L with a pH of 4.pH testing was carried out using a pH meter and the accumulation concentration of Cd was analyzed using Atomic Absorption Spectrophotometer (AAS). The results revealed that Typha latifolia planted on soil without fertilizer could increase the pH of acid mine drainage containing heavy metal Cd from 4 to ± 7 within 28 days.Typha latifolia can reduce the concentration of Cd in artificial acid mine drainage with the removal efficiency of 95 - 96%. The value of the Bioconcentration Factorin Typha latifolia exposed to acid mine drainage with concentrations of Cd 5 and 10 mg/L are > 1000, which means that this plant has the potential to be a heavy metal hyperaccumulator in phytoremediation.
Enhance sensitivity of plastic optical fiber sensor by spiral configuration for body temperature applications
Authors: Arifin A , Amaliyah K R , Lebang A K , Hamrun N , Dewang S , Tahir D 
Published: March 2021

Abstract
In this study, sensors to measure body temperature were made using a macro bending method based on plastic optical fiber. Fiber optic sensors are made to form a spiral configuration on variations in diameter and bend number. The body temperature sensors are mounted on the elastic cloth and placed on the armpit. The light from the LED transmitted into an optical fiber sensor is affected by body temperature, so there is power loss in the sensor. Power loss cause light intensity decreases received by the phototransistor and differential amplifier. The power loss of the sensor and temperature measurement results will be displayed on the computer through the Arduino Uno microcontroller. The range of temperature used is 28°C - 42°C. The best sensor characteristic obtains at the spiral configuration in a diameter of 0 cm with some bending four bends and a range value of 0.421 V, sensitivity of 30.071 mV/°C, and resolution of 0.033°C. Plastic optical fiber is very suitable to be used as body temperature sensors because it can enhance sensitivity.
Impact of potential earthquake disasters in the areas located in zone lineaments and the surrounding areas
Authors: Barlian Edo , Tarigan Johannes , Nasution Zulkifli , Purwoko Agus 
Published: March 2021

Abstract
In supporting the objectives of the Urban Spatial Plan, it is necessary toconduct a study on the readiness for response to natural geological disasters, especially areas located in fault zones as one of the sources of earthquake disasters in order to reduce risks that will occur and prepare serious mitigation studies on disaster management with efforts prevention, risk reduction and increased community preparedness in facing disasters. Part of the Deli Serdang Regency is an area located in the fault zone, namely in the Pancur Batu District and part of the Namorambe District. Based on these conditions, it is necessary to observe the impact on the development of the area around the fault zone. The method used in this study is a quantitative method with survey research and what is needed is seismic hazard data which includes Peak Ground Acceleration (PGA), physical properties of rocks, slope, seismicity, earthquake risk level, frequency of earthquakes, population, productive land and regional capacity. The observation area is Deli Serdang district which consists of 22 (twenty two) districts. The results of the analysis show that some areas of Deli Serdang district are included in earthquake-prone areas based on regional typology, namely type D and type E with land stability in the unstable category, namely some Gunung Meriah sub-districts, some STM Hulu sub-districts, some Sibolangit districts, some sub-districts Kutalimbaru, part of Sibirubiru sub-district and part of STM Hilir sub-district. Areas affected by the earthquake disaster need to be supervised in land use in order to reduce the impact of disasters in the long term and mitigation in the event of a disaster by applying Zoning Regulation and Building Code.
Calculation of PWR Thorium Pin Cell Burnup and Isotope Prediction Using WIMSD-5B Code
Authors: Tukiran S , Surian P , Farisy Y 
Published: March 2021

Abstract
The amount of thorium in the world is very abundant and the benefits of using thorium as fuel for nuclear reactors such as PWR are increasingly widespread, so it needs to be analyzed. In the initial phase, the PWR pin cell fuel analysis was carried out using the WIMSD-5B code. The PWR ThO2-UO2 fuel in the cladding with the fuel assembly model 17 x 17 is analyzed by its fuel burn up, neutron flux and isotope composition after maximum operation. The pin cell model consisting of fuel, cladding and coolant with a square pitch of 12.6 cm are calculated using different libraries. Eigenvalues, neutron fluxes and isotope concentrations were compared with the PWR pin cell model to high burnup. The eigenvalues and flux neutron as a function of burnup are good, the maximum difference is within 7.41% and the mean absolute difference is less than 3.12 %. The best comparison of fission product isotope concentrations is to use the ENDFB7.1 library with Thorium fuel and is comparable to the uranium fuel reported in the literature. Data sources for actinides and fission products used infuel depletion calculations for thorium fuel are all documented.
Influence of Lightning Characteristics on Back Flashover in Extra High Voltage Transmission Line: A case study
Authors: Hardi Surya , Mirza F , Bukit Ferry R A , Rohana  
Published: March 2021

Abstract
Lightning is one of the primary sources that cause failure on over head transmission system. It can lead to the transmission line insulator to be over voltage. Commonly, transmissions lines are equipped with ground wire and consist of one or two ground wire which it is depending on tower construction. Over voltage on the transmission line can occur in two ways viz., direct lightning strike on phase line and ground wire produce propagating wave to both sides the phase line and result in damage on insulator. Direct lightning stroke on ground wire or the tower structure of transmission can cause phenomenon back flashover (BFO) on insulator. The lightning current characteristic is distinguished in lightning maximum current and steepness of lightning current. This paper discusses influence of in different lightning characteristics on BFO in extra high voltage transmission line in simulation using ATP draw. The lightning surge currents of IEC and VDE standards were injected to the ground wire and phase lines. As the implementation, this paper used the data of extra high voltage transmission line of 275 kV, Galang - Binjai, North Sumatra Province, Indonesia.
Investigation of burning rate on particullate matter emission factor of rice straw burning (case studi in lombok island, indonesia)
Authors: Hadi K A , Wardoyo A Y P , Naba A , Juswono U P , Budianto A 
Published: March 2021

Abstract
This study investigates the emission factor arising from the agriculture waste burning especially rice straw burning. This research is a preliminary study to look further about the health impacts that occur due to the biomass burning that often occurs in Lombok island. The Laboratory study has been conducted to quantify the emission factor that looks into different burning rate related to the real condition in the field to estimate the health impact. The burning rates were varied into three different burning conditions, namely fast burning (13 m/s), medium burning (9 m/s) and slow burning ( 4 m/s). The concentration of the particle emissions (PM10 and PM2.5) were measured using a Handheld Air Tester (Hinaway, model CW-HAT200S) and a Digital Dust Monitor (Kanomax, model 3443). The emission factor is quantified by the total particle concentration divided by the burned fuel. The result shows that the burning rate determines the particle emission factor. The fast burning produces the particles the lowest PM10 and highest PM2.5 emission factor otherwise the slow burning results in the particle particles the highest PM10 and lowest PM2.5 emission factor.
Economic Design of Substation Grounding Grid using ETAP Software: A Case Study of 2 x 500 MVA Galang Substation
Authors: Hardi Surya , Andira R , Nisja I , Octrialdi B , Pinem M 
Published: March 2021

Abstract
Substation grounding purpose is to secure the safety of personal that are in the vicinity and provide protection of the equipment when short circuit faults. The grounding grid design is an important factor in a substation for fulfilling standard requirements formulated by IEEE Std. 80. Commonly, substation grounding is grid configuration or combination of grid and rod. This study is designing a substation economically by considering the length of rod conductor used. Some grid configuration models were used for analyzing viz. rectangular shape, T-shape and L-shape. The models were compared with the existing design in the Galang substation for finding the minimum conductor length. The grid grounding of the Galang substation is the rectangular shape. By using ETAP package software, the important parameters in design substations such as step voltage, touch voltage for 50 kg body weight can be obtained. The parameters must fulfill the IEEE std. 80-2013 as a safety requirement for designing of the substation. From various configurations were applied, all the shapes models meet the IEEE Std. 80, but T-shape is the most economical design based on the conductor length used.
The Reaction Mechanism of Ring-opening Polymerization of ε-Caprolactone Using Bis(benzoylacetonato)zirconium(IV) Catalyst With PM3 Semi-Empirical Method
Authors: Dibiyantini Ratu Evina , Yusuf Muhammad 
Published: March 2021

AbstractAcknowledged that polycaprolactone (PCL) is one of the prospective polymer category. This is due to PCL has a great mechanical properties, biodegradability, and excellent mixing ability with various other polymers. The effective technique to get PCL is through the ring opening polymerization (ROP) of caprolactone (ε-CL) using metal catalyst. The aims of this research was to determine a reasonable reaction mechanism of the ROP ofε-CL using bis(benzoylacetonato)zirconium(IV) chloride catalyst. In this investigation the PM3 semi-empirical method was assigned to calculate the monomer, intermediate structures, and polymer structure. Then, to compute and visualize geometry structure was employed by using the HyperChem 8.0 program. This software operates on the Windows 07 system. The calculation results imply that to get PCL using bis(benzoylacetonato)zirconium(IV) catalyst required a few steps i.e. coordination ε-CL in metal center, χ-CL deprotonation, the insertion of ε–CL, and propagation of the chain.
Design of task-based digital language teaching materials with environmental education contents for middle school students
Authors: Ramadhan S , Atmazaki  , Sukma E , Indriyani V 
Published: March 2021

Abstract
The year 2020 is almost over, but the COVID-19 pandemic in Indonesia has not been resolved. Distance learning has been implemented since early 2020, but there are still several limitations, one of which is the use of teaching materials. Teachers need to develop teaching materials based on their needs and current situations. Digital teaching materials will be very relevant to use for distance learning because they can be developed interactively. The teaching materials can be accessed via a computer or mobile device. Teaching materials are developed based on tasks. This method was chosen because it can support the distance learning process and can be used by all students, even though the digital devices and networks are limited. In addition, integrating environmental education in learning is currently very necessary so that students have knowledge and foster environmental awareness. Based on this, the purpose of this study is to develop a task-based digital language teaching material design with environmental education for middle school students. This type of research is development research using the Plomp Model (preliminary research; pratotype phase; and assessment phase). This study uses descriptive data analysis techniques. The results showed that the teaching materials developed were categorized as very valid and could then be tested on students.
Development e-Teaching Material Based Moodle Web
Authors: Ramadhani Putri Lestari S , Nurfajriani  , Silaban Ramlan 
Published: March 2021

Abstract
This study aims to determine the teaching materials used in schools are in accordance with the National Education Standards Agency and to develop e-learning teaching materials based on Moodle web media on solubility and solubility results. The type of research used is R&D (Research and Development) which is modified ADDIE model (Analysis, Design, Development, Implementation, and Evaluation). The research samples were class chemistry books, chemistry lecturers, IT experts, and chemistry teachers. The research instrument was a validator assessment sheet. Based on the results of the analysis obtained the percentage of eligibility of teaching materials used in school is 85% with a very feasible category, 2) the percentage of feasibility of teaching materials developed is 93.5% and the eligibility of Moodle e-learning 87.5%, so the teaching materials are based on Moodle is categorized as very feasible. So it can be concluded that the chemical teaching materials used in schools are in accordance with the National Education Standards Agency; Moodle Web-based teaching materials that have been developed can using in chemistry learning.
CA-Markov Model for Predicting Paddy-Field Land in Babulu Subdistrict, North Penajam Paser Regency, East Kalimantan
Authors: Hazani Syahla Nuzla , Damayanti Astrid , Indra Tito L. , Dimyati Muhammad 
Published: March 2021

Abstract
Paddy-fields in Indonesia continue to change their function every year as a result of the increase in land for settlements, as well as in North Penajam Paser Regency. The plan to relocate the capital city to North Penajam Paser Regency can support various impacts on land conversion, such as reducing paddy-fields so that paddy-fields productivity can be disrupted and reduce food availability. The purpose of this study to analyze and predict the availability of paddy-fields in 2031 in Babulu Subdistrict, North Penajam Paser Regency, using the CA-Markov method. Changes in paddy-field use were identified using remote sensing. This study’s driving factors are the distance from the river, distance from the road, distance from the settlement, slope, and elevation. The results showed that paddy-fields in the Babulu Subdistrict have increased during the period 2009 – 2020. Paddy-fields in 2031 will reach 12.3% of the total area. Paddy-fields have an increased probability in the regions that are high and close to rivers. The model shows that the paddy-fields land in the Babulu Subdistrict has increased in line with the increasing trend of the plantations and settlements area.
Impact of Vegetation Density Change on Land Surface Temperature in Kuta Utara Subdistrict, Badung Regency, Bali Province
Authors: Aginta Friscila , Damayanti Astrid , Dimyati Muhammad 
Published: March 2021

Abstract
Land function change can impact on decreasing green open space and land surface temperature (LST), which is one of the important parameters in environmental change. This study aims to identify vegetation density change and its impacts on land surface temperature in Kuta Utara Subdistrict, by comparing two vegetation indices to decide which vegetation index is more suitable if it is associated with LST. The Normalized Difference Vegetation Index (NDVI) and Enhanced Vegetation Index (EVI) were used to knowing vegetation density change. This study estimated the brightness temperature of the satellite to find out the land surface temperature. NDVI, EVI, and LST values were obtained through Landsat ETM+ and Landsat OLI in 2010, 2015, and 2020. The values are analyzed using the spatial-temporal analysis method to see the vegetation density change and LST. The results of NDVI and EVI analysis showed that there are changes in vegetation density for each year, especially in the east and west Kuta Utara Subdistrict. The decreased in vegetation density causing an increase in LST from 2010, 2015, and 2020. Based on the analysis results, vegetation density changes based on NDVI and EVI did not have a significant impact on LST in Kuta Utara Subdistrict.
Effect of Fillet Radius of UAV Main Landing Gear on Static Stress and Fatigue Life using Finite Element Method
Authors: Wibawa L A N 
Published: March 2021

Abstract
The landing gear is one crucial component in the UAV aircraft structure because it serves as the main supporting component of aircraft load when landing and take-off. This study aims to determine the effect of the fillet radius on static stress and fatigue life of the main landing gear for UAV aircraft. Static stress and fatigue life analysis using the finite element method with Ansys Workbench software. The fillet radius is varied 120, 130, 140, and 150 mm. Predictions for fatigue life use the Gerber mean stress theory with a full-reserved type of loading. Landing gear material uses Aluminium alloy 6061. The static stress analysis shows that the higher the fillet radius, the higher the von Mises stress of the main landing gear frame. The fatigue life analysis shows that the higher the fillet radius, the lower the fatigue life of the main landing gear frame. The main landing gear frame achieves the highest fatigue life of up to 3.90 x 107 cycles at a fillet radius of 120 mm.
Analysis of Science Process Skills Using Learning Cycle 7E
Authors: Khairani Z , Nasution D , Bukit N 
Published: March 2021

AbstractThis study aims to analyze how science process skills use the learning cycle 7E. This study describes science process skills using the learning cycle 7E for each indicator and describes the factors that affect science process skills. This type of research is a quasi-experiment with a pretest-posttest control group design. Data analysis was carried out using descriptive analysis which aims to be able to explain a symptom that occurs in research and to solve problems that occur on the basis of data obtained in the field. The results showed that science process skills using the learning cycle 7E had a significant increase, and there were factors that influenced the improvement of science processing skills, namely the use of the learning cycle 7E and several factors from outside the individual such as social and non-social environments.
Forecasting tourist visits using data decomposition technique and learning optimization of artificial neural network
Authors: Herawati S , Latif M 
Published: March 2021

Abstract
Estimates of tourist visits is very important to determining policy and decision making. This study proposed a new method for forecasting tourist visits. A case study was conducted at a tourist spot in Sumenep, Indonesia. The model proposed is data decomposition and optimization of learning against tourist visits data. Data decomposed use the Ensemble Empirical Mode Decomposition (EEMD) method, then data learning use the Feedforward Neural Network (FNN) which was optimized using the Polak-Ribiere Conjugate Gradient (PCG). The two methods are integrated to produce accurate forecasts. Several patterns of learning data were carried out in this experiment. The results of this method show good permformance results as measured used RMSE and MSE.