bluuebunny/crossref_metadata_2025 huggingface dataset:
Development of teaching materials based on realistic mathematic education and its implementation in improving students’ creative thinking skills on comparative material
Authors: Royhana U , Widiatsih A , Atmaja I W W , Septory B J
Published: March 2021

4C’s skills (creative, critics, collaborative, communicative) are the skills that are required in the 21st-century era. Accordingly, creative thinking ability is one of the demands required. It can be develop anywhere; one of them is in the implementation of learning conducted at school. The learning implemented by the teachers at school is expected to maximize the development of students’ creative thinking skills. The learning model of realistic mathematics education (RME) is one of the learning models used to optimize learning. This research aimed to study the students’ creative thinking ability and the RME learning model’s implementation in improving students’ creative thinking ability in solving the problem in comparison material. In this research we used a new study, this study was combining among qualitative method and quantitative methode, we call it with mixed method. This research involved 70 respondents in the same school who were divided into the experimental class and control class. The first class there are 35 students from control class and the second class there are 35 students from experiment class. The result showed that there was a significant difference, as shown up in the value of independent t-test toward the post-test. The result of the research showed that the post-test stage in the control class revealed that 16% students were in the category of uncreative, 33% students were quite creative, 29% students were creative, and 22% students were very creative and in the experimental class, it was found that 9% students were uncreative, 18% students were quite creative, 31% students were creative, and 42% students were very creative according to the level of creative thinking ability. The data analysis presented that the value of independent sample t-test from the post-test was sig. 0.00 (p 0.05), tBerefore it was significant. Thus, there was an effect of the implementation of realistic mathematics education (RME) in improving students’ creative thinking ability in solving problems in comparison material.
The analysis of the implementation of research-based learning on the students combinatorial thinking skills in solving a resolving perfect dominating set problem
Authors: Aziza M O , Dafik  , Kristiana A I
Published: March 2021

The Indonesian government gives freedom to citizens to get a quality education, this will enable students to develop their potential in a more targeted way. The purpose of implementing research-based learning is to see the combinatorial thinking ability of students in completing the resolving perfect dominating set. The research method used a combination method (qualitative and quantitative) research methods involving 30 students divided into two classes, namely the control class 16 students and the experiment class 14 students. The implementation of research based learning was carried out in both classes, but there were differences in the implementation where the experiment class was given the developed tools, but not in the control class. Analysis of the results of the homogeneity test on the pre-test items showed that the two classes were homogeneous with a significant value of 0.171 ≥ 0.05, and the analysis of the results of the independent sample t-test on post test resuld showed that the sig (2-tailed) value is 0.007 (p ≤ 0.05) so its significant. The results that have been obtained in this study can be concluded that there is an increase in students’ combinatorial thinking skills in solving resolving perfect dominating set in research based learning.
The effect of guided inquiry based hypermedia on students’ high order thinking skills in thermodynamics concepts
Authors: Nurmalasari M , Hertanti E
Published: March 2021

Thermodynamics is a concept in physics that is considered difficult. This is because the students have to use high order thinking skills. Meanwhile, some research results indicate that students’ high order thinking skills are still low. In this study, guided inquiry based hypermedia was applied to hone students’ high order thinking skills on thermodynamics concepts. This research was conducted at SMA Islam Terpadu Mentar iIlmu Karawang in April 2020. Quasi-experimental was used as a method in this research. The research sample was class XI students who were grouped into the experimental class and the control class. The test instruments used were essay questions and non-test instruments used were questionnaires. The N-gain result shows that the posttest mean score of the experimental class increased. However, the increase was categorized as moderate. Hypothesis testing shows that there is an effect of guided inquiry based hypermedia on students’ high order thinking skills. Meanwhile, the results of the questionnaire showed that learning using hypermedia based on guided inquiry received a positive response from students and was categorized as very good (83%).
Development of authentic assessment to improve students’ mathematical problem solving ability
Authors: Firdausi  , Supinah R
Published: March 2021

This study aims to find out how the implementation of authentic assessment development in producing a valid product by the principles and characteristics of authentic assessment to improve students’ mathematical problem-solving abilities. This research uses research and development methods with the stages of carrying out needs analysis, literature review, pre-test, designing an authentic assessment form, and conducting a post-test to determine students’ mathematical problem solving abilities before and after using authentic assessment. The results of the study concluded that the stages of authentic assessment development had been carried out through a limited validation process and broader validation involving experts to produce a product taking into account the principles and characteristics of authentic assessment. There is a difference in the average results of students’ mathematical problem-solving skills between the results of the post-test compared with the results of the students’ pre-test, so it is said that the development of authentic assessment can improve students’ mathematical problem-solving abilities.
Assessing islamic junior high schools students’ scientific literacy using PISA released items
Authors: Ramli M , Susanti B H , Yohana M P , Rozak A
Published: March 2021

This study aims to assesscientific literacy of students of Islamic Junior High Schools (Madrasah Tsanawiyah/MTs) by using the PISA released items. This study used a sequential explanatory research method with a mixed quantitative and qualitative approach. A total of 102students from 5 Madrasahs in West Sumatra and DKI Jakarta Provinces were selected using a purposive sampling technique. The instrument used is a scientific literacy test to collect quantitative data and interview guides for qualitative data. The quantitative data obtained were analysed using descriptive and inferential statistics, while the qualitative data were analysed using thematic analysis. The results show that scientific literacy score of Madrasah Tsanawiyah’s students is lower than the average score of OECD countries. The findings show that there are several factors that cause the low scores of madrasah students such as they are lackingof practicing the similar questions and lacking of opportunity to conducting science experiments.
Development of wolfram mathematica application-assisted learning module on derivative in high school
Authors: Musyrifah E , Rabbani H , Sobiruddin D , Khairunnisa
Published: March 2021

One of the benefits of studying derivatives is determining the best way to solve a problem. The available textbooks seem monotonous and do not allow students to understand the derivative concepts presented actively. This study aims to develop teaching materials in learning modules in the Function Derivative material assisted Wolfram Mathematica application using the ADDIE development model (Analysis, Design, Development, Implementation, and Evaluation). Data obtained from experts and students were analyzed using descriptive quantitative. Experts assess that the learning module made through the ADDIE stage is very eligible for students. Students also assess that the module is very suitable for use. This research and development still require a further assessment at the evaluation stage with summative types to obtain a maximum final product.
Laboratory activity-based learning to improve generic science skills on the concept of sensory systems
Authors: Hayati A , Juanengsih N , Fadlilah D R
Published: March 2021

According to the previous research, generic science skills are part of 21stcentury skills. It contributes to individuals’ practical and successful participation in the surrounding environment. Therefore, students supposed to be prepared to have generic science skills. These can be trained or honed through learning process that solves the problems. However, based on pre-observation, the reality was different. The teacher plays a role as a providers of knowledge, thus the students are not trained through solve the problem. Practicum is one of learning method/ process that contains generic aspects. Practicum is frequently conducted in the laboratory. Thus, this study aims to improve generic science skills through laboratory activity-based learning on the concept of sensory systems. The research method was quasi-experimental with a non-equivalent control group design. The sample consisted of 71 students in the two experimental and control groups. Generic science skills include direct observation, indirect observation, causality, modelling, logical inference, and abstraction. Research instruments using essay tests and observation sheets. The results showed that there was an effect of laboratory activity-based learning on generic science skills. Students’ generic science skills in the experimental group were better than the control, particularly in direct observation aspect as well as causality, modelling and logical inference.
Application of Genetic Algorithm to Optimize Lecture Scheduling Based on Lecturers’ Teaching Day Willingness
Authors: Subagio Ridho Taufiq , Kusnadi  , Putri Tiara Eka , Sokibi Petrus , Harahap Syaiful Zuhri , Darmansah
Published: March 2021

The scheduling of lectures is an important activity that is carried out every beginning of the semester. The process of making a lecture schedule in the Informatics Engineering Study Program of Universitas Catur Insan Cendekia Cirebon still uses office applications, so it takes a long time to complete. This is because certain criteria or conditions that make the scheduling of lectures complicated, such as the willingness of teaching days and courses for each lecturer to differ and the availability of parallel classes. The research methods used consist of several stages, namely data collection, analysis, and system design, as well as the implementation of software created. The method of data collection used is observation and library study. The method of analysis and design of the system used is Object-Oriented Analysis (OOA) using Unified Modelling Language (UML). Applications created using the PHP programming language with the Yii Framework and MySQL as databases, as well as applying genetic algorithms to solve scheduling problems. The result of this research is a lecture scheduling application used by BAAK Staff to create a lecture schedule in the Informatics Engineering Study Program. The application of this application can save time in the creation of lecture schedules.
Online Learning Based on the MIKiR Approach during the Covid 19 Pandemic at MIS Muhajirin Jambi City
Authors: Fatmawati Kiki , Siregar Nasyariah , Mukminin Amirul , Anwary Al , Ikhtiati  , Azim Paujan
Published: March 2021

Online learning using multiple platforms will be more effective when juxtaposed with other methods or approaches. This study aims to determine the online learning process based on the MIKiR Approach during the Covid 19 Pandemic at MIS Muhajirin Jambi City. This research is a qualitative descriptive field research. This research was conducted at MIS Muhajirin Jambi City. The subjects of this study were teachers and students of grade VI. Data collection was taken through interviews, observation, documentation and field notes. The author takes the role of a direct interviewer to explore more complete data for teachers and students. Thinking is a learning approach that was initiated by the Tanoto Foundation in 2018. Thinking stands for Experiencing, Interaction, Communication, and Reflection. The results showed that the online learning process based on the MIKiR approach began with the preparation of a learning implementation plan and the preparation of media and learning resources, learning assessment tools and learning scenarios along with Student Worksheets (LKPD) based on the “MiKiR” approach. The implementation of learning with learning steps consists of experiencing activities, interaction, communication, and reflection. Assessment is carried out by the teacher by assessing the assignments sent by students through google classroom to be used as a portfolio. Each lesson uses a learning approach to think, the teacher always tries to be creative and innovative in preparing teaching materials and learning scenarios.
Development of Interactive Learning Multimedia Using the Drill & Practice Model on Scientific Literacy of Junior High School Student
Authors: Lia L , Zulkardi  , Wiyono K
Published: March 2021

The purpose of this study was to develop interactive learning multimedia using the drill & practice model on the scientific literacy of junior high school students which had validity, practicality, and potential impact. This study used Frey and Sutton’s development research model which combined formative evaluation from Tessmer. This study was tested on junior high school students. Data were obtained from interviews, documentation, walkthrough, questionnaires, and tests. Based on the expert reviews, this interactive learning multimedia was declared very valid with an average score of 0.99 (the maximum score is 1). In the one-to-one evaluation, it was declared very practical with an average score of 0.83 (the maximum score is 1). In the small group evaluation, it was declared very practical with an average score of 3.34 (the maximum score is 4). In the field test, the average classical test result was 62.18 with a good category. From the research data, it can be concluded that interactive learning multimedia using the drill & practice model on the scientific literacy of junior high school students was feasible to use in learning. The research results imply that students can understand science with the help of interactive multimedia learning which can have an impact on students’ scientific literacy.
High School Students’ Experience Using Learning Management System on Chemistry In Age of Pandemic
Authors: Putro Tomas Istantyo , Budi Utomo Suryadi , Yunita Indriyanti Nurma
Published: March 2021

During the pandemic, LMS is getting popular for facilitating learning. LMS is a software application for network or online activity and an electronic learning program (e-learning program). This study aims to identify high school students’ learning chemistry experience with the Learning Management System (LMS) in the Pandemic Era. Fifty-four high school students of 12th grade from high schools in Karanganyar, Indonesia, participated in this research. The survey was used as the methodology. The survey instrument consists of 33 items, which are divided into six parts: student profile, analysis of the needs of internet, analysis of the needs of mobile phones, analysis of the implementation of learning chemistry during the pandemic, LMS application that has been used, and the mobile learning design expectations. The finding shows that most students use the internet more than 5 hours a day with the main priority for online learning, so they are consuming 10-20 GB of internet data per month. In online learning, most students use mobile phones. During the pandemic, the learning majority only consisted of assignment to practice problems via Whatsapp Group, Google classroom, Microsoft Teams, Google form, or watching videos via YouTube. With LMS, students feel sufficient and comfortable to support learning during this pandemic. Chemistry LMS is expected to contain a collection of materials, virtual, practice questions, a set of formulas, and animation.
The relationship between students’ problem solving skills and scientific attitude with students’ learning outcomes on stoichiometry at tenth grade at high school in Boyolali, Central Java, Indonesia
Authors: Kusuma Asri Kurniawati , Utami Budi , Mulyani Bakti
Published: March 2021

Student’s learning outcomes are influenced by several factors, both internal and external. Problem solving skills and scientific attitudes are internal factors affecting students’ learning outcomes. This was a quantitative research with the correlational approach and quantitative descriptive method. The populations were grade X science program students at SMA Negeri 1 (Senior high school) Boyolali, Surakarta, Central Java, Indonesia, academic year of 2019/2020. The data were analyzed with the correlation and regression analysis. The results showed the significant positive relationship between problem solving skills with students’ learning outcomes with the correlation coefficient value of 0.845 and determination coefficient of 71.4%; the significant positive relationship between scientific attitude with students’ learning outcomes with the correlation coefficient value of 0.926 and determination coefficient of 85.7%; and the significant positive relationship between problem solving skills and scientific attitude with students’ learning outcomes with correlation coefficient value of 0.936 and determination coefficient of 87.5%. The effective contribution of problem solving skills was 20.45%, and the scientific attitude was 67.05%. The relative contribution of problem solving skills was 23.4%, and the scientific attitude was 76.6%.
Performance asessment to measure students’ explanations in chemistry learning
Authors: Utami Budi , Saputro Sulistyo , Ashadi  , Masykuri Mohammad
Published: March 2021

One of the components of critical thinking is an explanation. This study aims to identify critical thinking skills in aspects of explanation using a performance assessment rubric. To measure students’ scientific explanations in chemistry learning, a performance assessment rubric is needed. The arrangement of rubrics based on indicators of students’ scientific explanations on chemical equilibrium material. This research uses the RASCH analysis model, the instrument was in good category. The number of samples is 122 students from one senior high school in Surakarta, Central Java, Indonesia. The results showed students still had difficulty explaining ideas, students had difficulty explaining phenomena and connecting with relevant information.
Instrument Development For Evaluating Students’ Employability Skills
Authors: Fajaryati Nuryake , Budiyono  , Akhyar Muhammad , Wiranto
Published: March 2021

An assessment on the level of employability skills of students is deemed necessary, given the employers’ need for skills that must be mastered by job seekers. The purpose of this study is to create an instrument that is able to assess the level of mastery of students’ employability skills. Instrument making was carried out through seven stages: composing of variable constructs, preparing of instrument lines, arranging the instrument items, conducting content validation, testing instrument, conducting the consistency analysis of items, and estimating the reliability coefficient of instruments. Based on the instrument making process, it has been found out that the construct of the measured employability skills variable includes the skills of communication, teamwork, problem-solving, and technology utilization. Subsequent stages were carried out procedurally and content validation was carried out until obtaining the expert approval. The process of analyzing the consistency of items and estimating the reliability coefficient of the instrument was conducted using the SPSS. The results of the consistency analysis of items with SPSS showed seven statement items that had an internal consistency index below 0.3. As a consequence, these items were not used for not representing the construct of the measured indicator. After doing the item consistency analysis, 49 good items were obtained and the instrument reliability coefficient was estimated. Based on the analysis results, the reliability coefficient of the instrument obtained the value of 0.905. As the results obtained were more than 0.7, the instrument was then stated to be reliable and could be used as a data collection tool.
A Framework of Science Based Entrepreneurship Through Innovative Learning Model Toward Indonesia in Society 5.0
Authors: Sajidan  , Atmojo Idam Ragil Widianto , Febriansari Devie , Suranto
Published: March 2021

A technological development has extremely changes the value of society which is now moving to society 5.0. It is an era in which technology is being a part of human life. Internet is supposed not only to be an information media but also becomes a part of life including in education. Society 5.0 requires students to have the ability to solve complex problems, think critically, and be creative. This ability is needed to adopt the development of science and technology, not only as a “taker” but also as a “maker” through entrepreneurial principles. Therefore, the learning system should move to the concept of science-based entrepreneurship (SciPreneur). However, the current entrepreneurial learning system has not adopted the learning paradigm emphasizing on cognitive understanding because the learning process is still either theoretical-based or rote learning. Therefore, we need an appropriate learning model to accommodate a learning system to meet the society 5.0. In this paper, we introduce a framework on science-based entrepreneurship using the discovery ability-based creative entrepreneurial learning model (CEL-BaDiS UP). This model is expected to enhance a science-based entrepreneurship skill.
Graphene Sensor for Future Local Economic Development: A Review
Authors: Muslihati Atqiya , Basri Hatijah , Wibowo Kusnanto Mukti , Sahdan Mohd Zainizan , Rosni Nurliyana Md
Published: March 2021

Graphene, a family of carbon has been known as a superior material of both conducting and transparent. Therefore, graphene is very promising material for many applications on microelectronics and nanotechnology. The structural, thermal, optical and electrical properties of the graphene were also potential to be applied on sensor. Graphene is the most recognized nanoparticle for fabrication of biomedical sensors due to its stimulating qualities such as excellence aqueous process ability, functional surface properties, surface-enhanced Raman scattering, cell growth ability, and good biocompatibility. Due to the high specific surface area of graphene, it was very excellent material for gas sensor application. The outstanding properties of graphene were also led to increasing the demand of graphene every year which is dominated by China (70%), India (14%), and Canada (2%). Moreover, current marketplace of graphene was also dominated for academic research, super capacitor, ITO, and sensor. Every year, the market of graphene sensor is continuously increasing. This trend reveals graphene-based sensors very promising commodity for future technology. The present study highlights the state of art review and potential future local economic development of graphene for use as sensors.
Learning Obstacle of Addition Operation Whole Number in Elementary Schools
Authors: Sidik Geri Syahril , Suryadi Didi , Turmudi
Published: March 2021

This study aims to analyze the learning obstacle of students in elementary schools on the addition operation whole number. The research method used is a qualitative descriptive research method. The subjects of this study were 15 elementary school students who were selected using a purposive sampling technique. Data collection techniques include non-participatory observation, test of addition operation whole number in the form of story questions, unstructured interviews, and documentation studies. The results showed that there were learning obstacle for elementary school students found in the addition operation whole number including: 1) students had difficulty understanding the meaning of the questions; 2) students have difficulty understanding the concept of place value; 3) students have difficulty translating questions into math sentences; 4) students have difficulty doing addition calculations, other than the pattern a+b=?; 5) students have difficulty giving conclusions from the results of their work; and 6) students do not have confidence in solving problems. This study concludes that students experience three types of learning obstacles, namely: ontogenic obstacle, didactical obstacle, and epistemological obstacle. The implications of the results of this study can be used as an analysis of student learning needs and the factors that affect student learning difficulties, especially in mathematics.
The Development of Guided Inquiry Based Science Basic Concept Teaching Materials
Authors: Ula Wahyu Rofikhatul Rikha , Mariyani Anna
Published: March 2021

Natural Science is mostly delivered using the lecture method and providing exercises or written assignments as well as laboratory activities which are limited to carrying out the activity steps according to the worksheets used. In this case, the educators do not provide opportunities for students to conduct experiment according to their ideas and knowledge. As a result, the process of learning becomes less interesting and meaningful. The purpose of this study was to determine the development of guided inquiry based science basic concepts teaching materials. The method used in this study was a research and development. This study was conducted in several stages, they are define, design, develop, and disseminate. This study was conducted at STKIP Muhammadiyah Blora by using the research data sources that derived from experts, professionals, educators, and students. The results of this study indicated that; (1) the define stage was carried out by using front end analysis (FEA) which consists of field studies and material analysis; (2) the planning stage (design) begins with the preparation of learning tools, preparation of questionnaire guidelines, observation, interviews, preparation of guided inquiry based teaching materials, and restrictions on the scope of the research; (3) the development stage (develop) was conducted through two steps, namely; 1) expert judgment followed by revision; 2) limited scale trial and error. The results of the validation of the feasibility of teaching materials for the guided inquiry based science basic concepts obtained an average percentage of 83% with feasible criteria; and (4) the product dissemination stage in the form of guided inquiry based science basic concepts teaching materials conducted on lecturers and students. The conclusion of this study is that guided inquiry based teaching materials are suitable to be used for teaching. The implication of this study is that the development of guided inquiry based science basic concepts teaching materials can increase the activity of students in the learning process.
Tar Kinetic Parameters of Pyrolysis Processes of Brem, Plastic, and Durian Skin Waste with Temperature Variations on A Rotary Kiln
Authors: Majedi Farid , Arifin Agus Choirul , Asngali Bi , Wahyu Barkhawa Handi
Published: March 2021

Pyrolysis is a decomposition process chemical ingredient by adding the heating process without oxygen, where is the raw material/biomass will experience the breakdown of chemical structures to the gas phase. It produced char, tar, and gas. This research uses a rotary kiln system, in which the pyrolysis tube is rotated at low speed. Biomass in a rotating pyrolysis tube has an even heat. The pyrolysis temperature used in this research is 523K, 57K, 623K, 673K, The heat in the pyrolysis tube comes from heating the LPG stove. The heating is adjusted in such a way that the heat can be reached at the desired temperature. The tar formed in the pyrolysis process is calculated its kinetic rate value. The biomass used in this study is a waste of brem, plastic, and durian skin. The results showed that with increasing temperature, the tar volume would increase. The value of the kinetic rate is strongly influenced by variations in pyrolysis temperature. The pyrolysis temperature is large, so the kinetic rate is also large. The best kinetic rate at a temperature of 673 K in all biomass. The type of biomass can affect the kinetic rate. Plastic waste biomass has the smallest kinetic rate value compared to other biomass. The density of bio-oil will decrease with increasing pyrolysis temperature.
Design of Generator HHO Dry Cell Type and Application on 110 Cc Engined Vehicles Towards Gas Emissions
Authors: Puspitasari Indah , Wahyudi Noorsakti , Fakhrudi Yoga Ahdiat , Priyo Wicaksono Galih
Published: March 2021

The HHO generator is a tool that works on the principle of water electrolysis to produce HHO gas, which is a gas consisting of 2 hydrogen molecules and 1 oxygen molecule where the gas can be used as fuel. The number of holes on the plate electrodes affects the amount of discharge and the efficiency of the HHO generator. Therefore, a study was conducted regarding the number of holes on the electrode plate. The parameters measured were voltage, electric current, electrolyte temperature in the reservoir tank, electrolyte temperature in the HHO gas cylinder, and the HHO gas discharge. Whereas what is calculated is the power required for the HHO generator, the production rate, and the efficiency of the HHO generator. Furthermore, the HHO generator was applied to a 110cc vehicle to measure the level of exhaust emissions. Based on the results of the study, the best variation of HHO generators is found in the hole plate electrode 2 with the required power of 180.78 watts and an efficiency of 63.8%. The lowest CO emission levels were in the 2 holes variation, namely 4.01%, and the lowest HC emission levels were in the 4 holes variation, namely 892 ppm.
Online Presence Implementation System in the New Normal Era
Authors: Prihatinta T , Lestariningsih T , Srimiatun  , Maaliah E
Published: March 2021

The current covid 19 outbreak has a very wide impact on various sectors in the world including in Indonesia, one of which is the education sector in Indonesia. So that to deal with the covid 19 virus, Indonesia applies the new normal era policy that is currently being implemented. The application of online learning in the education sector is one of the government policies in the new normal era. All education sectors including tertiary institutions implement an online learning system and online presence. With online presence, it is necessary to review the success factors of implementing the online presence information system. So it is necessary to conduct an evaluation related to the online presence information system with the aim of knowing the factors that support the success of implementing online presence. To evaluate the online presence using the DeLone & McLean method to determine the factors that influence the success of the information system success model. The results obtained state that the system quality factors, information quality, service quality and user satisfaction affect the successful implementation of online presence in the new normal era.
The Use of Whatsapp Gateway for Automatic Notification System
Authors: Yulianto S V , Setia L D , Atmaja A P
Published: March 2021

Whatsapp is a messaging application from facebook which many people use it. For using whatsapp, someone must have a mobile number. The mobile number will be account in whatsapp application. In addition for chat, whatsapp can be a tool for notification system. The notification system can broadcast the messages that called as Whatsapp Gateway. Whatsapp gateway can be implemented for the school notification system where the parents of students can recieve notification from school. The Whatsapp gateway developed consists of fingerprint device, sender engine, management information system, and whatsapp gateway application. When someone checked their finger through fingerprint device, the fingerprint device will captured date and time then save it. The sender engine will checked data from fingerprint as periodically and send data to whatsapp gateway application through Application Programming Interface (API). To prevent blocking from whatsapp, whatsapp gateway will checked handphone number or whatsapp account from inbox message. If the handphone number or whatsapp account was found in inbox message, whatsapp gateway application will send message as notification.
Rainfall Prediction Due to El Nino Factors Using Recurrent Neural Networks
Authors: Fadilah Rizki , Djamal Esmeralda C. , Ilyas Ridwan
Published: March 2021

El Nino is one of the natural phenomena that have a significant influence on the weather, causing a longer dry season in several regions of Indonesia, one of which is the city of Lampung. One way to anticipate a long drought is to predict rainfall, by looking at the intensity of the rain. This paper proposes rainfall prediction using a recurrent neural network. Weather variables used to predict rainfall include air humidity, wind speed obtained from BMKG stations, and SOI index obtained from the NCDC website in the past 10 years. Weather data will be interpolated and extracted to find the maximum weather value per 4 weeks, the next step is overlapping, after which the data segmentation and normalization become 0-1 to make the data values not far adrift. The results showed the prediction of rainfall with a vulnerable 4 weeks using the Recurrent Neural Networks method produces an accuracy of 89.53%.
Management Information System for Lancang Kuning Hospital Dompet Dhuafa Pekanbaru Using Codeigniter Framework
Authors: Ismainar Hetty , Melyanti Rika , Yulisman  , Daulay Suandi , Irawan Yuda , Ordila Rian
Published: March 2021

The very rapid development of technology creates many technological products, especially in the field of Information and Communication Technology (ICT). The development of ICT in the world is increasingly widespread, where the use of ICT is not limited to the trade sector, but in other fields, such as government. The Clinical Management Information System is a form of technological development aimed at clinics in order to manage clinical management data in an integrated electronic reporting information system. To make it happen, a system was created that could manage patient medical record data so as not to wait long. The system also contains drug data, doctor data, employee data, action data and cashier bills. The method used in the development of this system is the waterfall method. It is hoped that the construction of this system can help facilitate clinical service staff in patient data, drug data, doctor data, employee data, action data and cashier bills.
Application of Thermoelectric Generator TEG Type Parallel Series Electric Circuit Produces Electricity from Heat Rocket Stove
Authors: Susanto F , Salim A T A , Romandoni N , Wahyudi N , Indarto B , Junaedi Z M A , Basyar K A , Furqan J A , Putra G A B
Published: March 2021

In rocket stove, wood is burned in a simple combustion chamber. This combustion chamber is connected by chimneys and air holes. Several studies have been carried out to utilize the heat generated by combustion of rocket stove, namely thermoelectric generators. Thermoelectric generators are electrical generator devices that convert heat energy or temperature differences into electrical energy using a phenomenon called the seebeck effect. The thermoelectric generator used in this study is TEG SP1848. How this tool works is a compilation of combustion occurs on a rocket stove then the copper pipe which is wrapped around a rocket stove flowed by wateralso rises in temperature, and the circulation of water from the chamber passes through a copper pipe, within 30 minutes the water in the chamber reaches 90°C ± then it is done from the power generated by the TEG connection then the test is done by loading a resistor of 1kΏ-10kΏ the highest generator efficiency values obtained at the 5k ohm resistor reached 5.38% of the left TEG. For TEG the right side of generator efficiency tends to be stable. The highest value of the right-side TEG generator efficiency is obtained at 0.48% at 2k ohm resistance.
Static Analysis of Railway Axle using Finite Element Method and Monitoring of Railway Bearing Based on Vibration Analysis
Authors: Asngali B , Susanto A , Subkhan M F , Martinez I , Yamada K , Majedi F
Published: March 2021

Railway axle and railway bearing are critical railway components. It is needed a method to analyse them. In this work, static and dynamic analysis are presented. Static analysis is presented by analyzing the design of railway axle through finite element analysis (FEA). Dynamic analysis is presented by analysing the outer race fault of the railway axle bearing based on vibration analyses. Initially, a laboratory-scale of wheel-set test-rig was designed using 3D computer design, then, the design was analysed the shear stress and deformation by FEA. Based on this design, the laboratory wheel-set test-rig was manufactured for conducting dynamic experimental tests. The vibration responses obtained in the tests were then analysed using fast Fourier transform (FFT) and Hilbert-Huang transforms (HHT). The results show that the stress and the deformation are small enough. Therefore, the design can be applied. In the vibration analysis, EMD process provided good results for analysing signals.
Electrical Motor Interference Monitoring Based On Current Characteristics
Authors: Triyono B , Prasetyo Y , Winarno B , Wicaksono H H
Published: March 2021

The use of electric motors of the industrial world is as a motor for production equipment. One example of using an electric motor is a conveyor. The conveyor has a long operating time. Conveyors can move objects from one place to another. Therefore, the condition of the conveyor machine must be good so that there are no operational errors. Errors in conveyor operation can result in delays in the production process. From these problems, research is made on a controller and monitoring of electric motors on the conveyor based on current parameters. This electric motor monitoring is based on Programmable Logic Control. This system is designed by utilizing a Current Transformer to measure the current in each electric motor. This current condition detects the condition of the electric motor in real time. If there is a change in a current that is not in accordance with the normal current, the system will detect a disturbance. This system can also control the direction of motor rotation. This system can inform all forms of disturbances to electric motors in the form of indicators and graphs of current movements in real time.
Fuzzy Logic for Lighting System in Eco Airport Passenger Waiting Room
Authors: Faizah Fiqqih , Suhanto  , Kustori  , Utomo Satryo Budi
Published: March 2021

The lighting system is one of the great considerations in the eco airport buildings concept. The buildings are usually designed applying transparent-material-covered walls to get the advantages of natural and artificial lighting combinations to optimize and save the consumed energy. This research proposes the use of a fuzzy logic method to control the artificial lighting in the airport passenger waiting room to obtain effective and efficient lighting energy consumption. Using LEDs as lighting devices, the lighting areas are divided into several rectangle zones to simplify the adjustment. For every zone, LEDs are divided into 4 groups, 2 groups are on the upper side and the others are on the lower side. Each group consists of 2 sets of light lamps and placed between the diagonal-adjacent sensors line. Light sensors are placed on each side of the zone to obtain the optimal control result. The LEDs group will be only affected by the two adjacent sensors that flank them diagonally. The result showed that the LEDs current supply controlled by fuzzy that applied to one zone can give sufficient illumination as the IATA’s requirement which is between 200 – 300 lux on the floor level.
Study of Lora Module Ra-02 For Long Range, Low Power, Low Rate Picture Transfer Applications
Authors: Juliando D E , Putra R G , Sartika D A , Yudha R G P
Published: March 2021

LoRa is a long-range, low-power, low-bitrate communication technology that is a major component of the Internet of Things (IoT). In realizing smart cities, many environmental parameters are observed in decision making that supports sustainable development. LoRa is an alternative to wireless communication from wifi and GSM networks which are more power-consuming. The use of many sensor nodes that are distributed in areas with difficult access to electricity requires low power usage. The use of low-power LoRa has the disadvantage of slow transmission speeds. Although environmental monitoring based on specific parameters such as temperature, humidity, gas, pH, etc. has been widely applied, visual environmental monitoring is necessary. In monitoring volcanoes, visual field inspections are needed to support decision making. Monitoring can be done periodically based on time. The LoRa Ra-02 module is a Lora module that is cheap and widely available in the market. In this research, a study on the potential use of the Lora Ra-02 Module for low-speed image transfer applications was conducted.
Determination of Construction Safety Costs in Industrial Projects
Authors: Muntiyono  , Herawati  , Sufyani Rosyidin , Sartika Ika , Fadriani Hetty
Published: March 2021

Construction projects are increasing in number and budget every year, as well as the level of accidents in the construction sector has not decreased as issued by the strategic issue of K3, construction accidents are in the first place with 32% in 2017 and recently there was the collapse of a 4-story building in Jakarta. In the previous regulation, Financing for Construction Safety was regulated separately from Contracts financed by the State Budget so that labor guarantees were not clear. With SMKK, work safety financing becomes a package in the contract. Service Users provide consultancy services and Construction Work while Service Providers perform Construction Work and Construction Safety. With these data, the authors have a goal of how the cost of construction safety can be implemented in order to reduce the number of accidents that arise. Methods The research was conducted by looking for relevant references from various sources and conducting interviews with several project implementers. The conclusion is that SMKK financing is a package with the implementation contract, so certainty for personal protective equipment and work protective equipment is available if neglected by the labor service provider can use for it.
Development of Environmentally Friendly Urinal Automatic System
Authors: Bakhri Syaiful , Tamim Muhammad , Firasanto Gaguk , Sekarsari Kartika , Kusnadi Heri
Published: March 2021

The urinal system, with the automatic watering system (flushing), has been widely applied in several public places in Indonesia. Still, the system sometimes does not meet Indonesian habits, especially for a Muslim, as well as less environmentally friendly. For example, it is not fitted with watering facilities (flushing) to clean vital organs and consider the sufficient (not excessive) volume of water. Another essential function is monitoring the availability of water supply and the urinal itself so that it can help the maintenance with simultaneously monitor the availability. Therefore, this research aims to design an environmentally friendly urinal system. In this study, the design and development of IoT-based flushing automation systems employ HC-SR04 ultrasonic sensors, YL-83 as a detector, and ESP8266 wifi module connected to an android-based mobile phone. The urinal flushing automation system is designed with an Arduino Nano Microcontroller capable of detecting someone who will urinate and provide sufficient watering to clean it. The test results are carried out on the effectiveness of distance detection, the adequacy of water discharge, and monitoring of the availability of water. The test results are also compared with a similar type of commercial urinal system. The complete results will be described in the full paper.
Household Hazardous Waste Identification in Rural and Urban Areas (Case Study: Belotan Village, Magetan and Cikarang Baru Housing, Bekasi, Indonesia)
Authors: Laili Fitri Nur , Kristanto Gabriel Andari
Published: March 2021

Many household products contain hazardous material, and after the expiration, they become household hazardous waste. Household hazardous waste that discharged into the environment can have negative impacts on health and the environment. This study aimed to identify household hazardous waste in urban and rural areas. Waste identification carried for eight days to 60 households in the rural area and 55 households in the urban area. This study’s results indicate that household hazardous waste accounts for 5,30% (rural areas) and 8,22% (urban areas) in the municipal solid waste stream. Household hazardous waste in the rural area dominated by sanitation (35,97%) and household cleaning products (18,73%). In comparison, household hazardous waste in urban areas dominated by sanitation (64,80%) and household cleaning products waste (15,81%). Economic factors and lifestyle are factors that influence a different household hazardous waste generation in urban and rural areas.
HFACS for Mapping Strengthening Human Factor Training Material on Prospective Aircraft Technicians
Authors: Rifai Mochammad , Setiyo P Achmad , Suprapto Yuyun , Harianto B B , Irfansyah Ade
Published: March 2021

In order to reduce the number of flight accidents due to human factors, the ICAO issued Standards and Recommended Practices which were followed up by the Indonesian government by issuing regulations regarding the need to attend human factor training for technician personnel. One method that can be used to analyse flight accidents related to human factors is the Human Factors Analysis and Classification System (HFACS). HFACS analysis will be able to provide information about the weak points of the human factor, where this information will provide improvement in the material implementation of human factor training. This research is a descriptive study, where data obtained from online questionnaires will be analysed based on the HFACS. The population is aircraft maintenance technicians graduated from Surabaya aviation polytechnic for 410 people distributed in various MRO companies with samples taken for 186 people according to Herry King Nomogram, with a confidence level of 95%. The results of the analysis using the HFACS of the highest percentage are unsafe act operators, precondition for unsafe, unsafe supervision, organizational influence which is necessary to strengthen and enrich the syllabus of human factors on topic of human error, performance management, communication skill, situation awareness and reporting and investigating errors.