Indonesia Conference Directory

Corresponding Author
Muhamad Nursalman

Institutions
Universitas Pendidikan Indonesia

Abstract
In the field of communication there are services that function as a means of community service. This service is useful for facilitating or accelerating community action in reporting and providing first aid to the authorities. The form of assistance services is oriented towards public complaints on emergency services. However, in this study it will only be more emphasized for complaints services related to the Polsek agency. In addition to the positive aspects of this service, there are also negative impacts such as sending fake data or misuse of someones data, therefore a Complaint Service security system is created using the Two Central Facilities Protocol, assisted by cryptographic security methods using the RC6 algorithm, which when when the login reporter will enter the validation number generated with One Time Password sent via email which aims to find out that the reporter is actually logged in and for the reporter report data security using the RC6 algorithm which is used when encryption and decryption of reporting data is sent to the police station or police station. From the system, obtaining the assessment of the user or user, the following are aspects of the assessment: Usability, Information Quality, and Interaction Quality from all aspects get an average value of 81%, 82.8%, and 83.1%.

Keywords
Complaint Service, RC6 Algorithm, One Time Password, Protocol Two Central Facilities, Cryptography

Topic
Computer Science

Link: https://ifory.id/abstract/dcTyuRp8JFD6

Corresponding Author
Enjun Junaeti

Institutions
Universitas Pendidikan Indonesia

Abstract
Efficiency, enhancement, and transformation are identified as potential advantages in the use of technology in enhancing learning and teaching, so this has become an attraction for researchers to continue to develop technology enhance learning (TEL). Nevertheless, the issues in related to types of technology intervention, ways of conceived enhancement, and associative evidence require further deep thought so that TEL does not become a tool to substitute the existing pattern of teaching and learning. This study aims to implement the concept of the snakes and ladders game in the design of multimedia-based learning as a TEL that meets the didactic requirements. As an evaluation of meeting the requirements, the design is implemented in the development of multimedia about linear space created by following the ADDIE framework and used in the learning process in the classroom. Based on the results of the study, it was found that the multimedia developed had fulfilled the didactic requirements, namely: to have the opportunity to develop fundamental knowledge, to integrate theory into practice, and to develop critical thinking skills.

Keywords
snakes and ladders game; TEL design; didactic requirement

Topic
Computer Science Education

Link: https://ifory.id/abstract/rpL2R9vMmYWP

Corresponding Author
Rochanda Wiradinata

Institutions
Universitas Swadaya Gunung Jati Cirebon

Abstract
Abstract. Learning is an important factor in achieving educational goals, not only as a means of supporting improvements in the past, but it has been a process that anticipates improving the quality of education in the future that increases progressively. The rapid development in the field of information and communication technology, today goes hand in hand with the advancement of science and technology in the era of learning society or learning society. The existing E-learning system is only able to present the same teaching material to all users without considering their characteristics. On the other hand, there was a lot of criticism of the way the lecturers who conveyed the concept only about nothing and the students were only burdened with a lot of training assignments without any related understanding. Presentation of material contained in textbooks and practice questions does not need to help students to learn to understand it effectively and be improved. The purpose of this study is to discuss site-based learning which includes a needs analysis and technology analysis of website-based learning, formulating the task of analyzing teaching materials, developing teaching materials and sending teaching materials and supporting as a draft in website-based learning, improving the quality of learning, learning and Learn more about teaching material so that it can be accessed anywhere and anytime and by anyone This research is a development research that uses a 4-D model developed by Thiagarajan, which defines, designs, develops and develops to develop website-based learning that involves compiling teaching materials published in websites through performance evaluations evaluated to improve student learning independence in corporate accounting courses. The results of this study indicate that with teaching materials based on WEB that have validated validity by material experts, design experts, practicum experts show that students are independent in learning both from material reading sessions, discussions, work assignments and projects. Learning completeness is indicated by the results of the completeness test which agree that students complete independently and classically.

Keywords
WEB Based Learning, Bank Reconciliation Lecture, Development Research, Performance Assessment

Topic
Computer Science Education

Link: https://ifory.id/abstract/E4FfegrzYaGK

Corresponding Author
Indah Laelasari Efendi

Institutions
Universitas Pendidikan Indonesia

Abstract
The purpose of this research is to investigate the effect of implementing project-based learning on students- creative disposition, creativity, and understanding in learning light and optics. The method that was used in this research was experimental research. The sample was taken by purposive sampling technique in experimental class (n= 21 students) with the population of 8th grade students at Junior High School in Bandung. The experiment class was given treatment using Project-Based Learning. The result shows that creative disposition appear for 74.95 minutes of the total appearing time of all creative disposition indicators. Then, the result of students- creativity was 69.73% which categorized as good. According to the result of analysis of students- understanding, proves that there is improvement in students score in learning light and optics after the implementation of project-based learning. This result can also be seen by the significant 0.001 which means there was improvement in students; understanding. The recommendation of this research is to try to conduct the research in different topic.

Keywords
Project-Based Learning, Creative Disposition, Students- Creativity, Students- understanding, light and optics

Topic
Integrated Science Education

Link: https://ifory.id/abstract/d7bYEmGwkCvQ

Corresponding Author
Septinaningrum -

Institutions
1Program Studi Pendidikan Dasar, Jl. Dr. Setiabudi No. 229 Bandung 40154, Indonesia
2Departemen Pendidikan Kimia, Universitas Pendidikan Indonesia, Jl. Dr. Setiabudi No. 229 Bandung 40154, Indonesia
3Jurusan Pendidikan Guru Madrasah Ibtidaiyah, IAIN Tulungagung, Jl. Mayor Sujadi Timur No. 46 Tulungagung 66221, Indonesia
4Departemen Pendidikan Guru Sekolah Dasar, Universitas Bhayangkara Jakarta Raya, Jl. Darmawangsa 1 No 1 Jakarta 12140, Indonesia
5 Prodi Pendidikan Guru Sekolah Dasar, STKIP Sebelas April, Jl. Angkrek No. 19 Sumedang 45323, Indosesia
6 Prodi Pendidikan Guru Sekolah Dasar, Universitas Syah Kuala, Jl. Tgk Hasan Krueng Kalee Banda Aceh 23111, Indonesia

Abstract
Abstract. This research was aimed at investigating the development of students- creative thinking skill through project-project oriented Read-Answer-Discuss-Explain-and Create (RADEC) learning model. The background of this research was the low students- creative thinking skill at the fourth semester of group G department of PGMI, IAIN Tulungagung in Subject of Biology for Elementary Education. Project-oriented RADEC learning model was considered effective to solve the problem. The excellences of this learning model is that its syntactic stage which is certain, easy to understand, and can be implemented based on the students- characteristics in Indonesia. Moreover, the create stage in this model can integrate knowledge and experience through project so that the students- stimulating and accommodating ability of the students- creative ideas. This research applied quantitative research method by using pre experiment one group pre test post test design. The instruments of data collection were test, observation sheet, interview, and field notes. The result of the research showed that there was a significant development of the students- creative thinking skill such as 40. 1%, flexibility 43. 81%, originality 37%, and elaboration 45. 04%. Therefore, it can be concluded that project-project oriented RADEC learning model can be used to develop the fourth students- creative thinking skill in Subject of Biology for Elementary School Department of PGMI at IAIN Tulung Agung 2018/2019.

Keywords
RADEC learning model, Project-oriented, Creative Thinking Skill

Topic
Biology Education

Link: https://ifory.id/abstract/WqfDMudVZUj7

Corresponding Author
Andi Suhandi

Institutions
Departemen Pendidikan Fisika, Universitas Pendidikan Indonesia, Jl. Dr. Setiabudhi No. 229, Bandung 40154, Indonesia

Abstract
The aim of this study was to find out the effect of using computer assissted-conceptual development conceptual change text (CA-CDCCText) in improving high school students- mental model related to the concept of battery function in the DC circuits. CA-CDCCText consists of six part of the text. The method used in this study is a pre-experiment with one group pretest-posttest design. The number of research subjects was 36 students consisting of 20 female and 16 male students, at one high schools in West Java province. Data were collected by level of conceptual understanding test related to the concept of battery function in the DC circuits. The results showed that the use of CA-CDCCText in physics learning could be improved the mental model of 78% of high school students towards a scientific mental models. These results indicate that the use of CA-CDCCText has a high effectiveness in improving high school students mental model related to the concept of battery function in the DC circuits.

Keywords
High school students, CA-CDCCText, Mental Model, Battery Function

Topic
Physics Education

Link: https://ifory.id/abstract/phYCeVdLxAPE

Corresponding Author
Heri Sutarno

Institutions
Computer Science Education Department
Faculty of Mathematics and Science Indonesia University of Education
Bandung, Indonesia

Abstract
Education is very important for a nation in developing its human resources. This research supports a consistent, systemic and sustainable "school literacy movement" program. The purpose of the PKM of the Patronage Village is to create the habit of reading from teachers, staff, and students at the Primary School in Rancabolang, Gedebage, Bandung. The objectives of this study include 1). Improving School Quality with ICT Training, and Student Reading Interest in Primary Schools at Rancabolang Gedebage Bandung. 2) Training on making Multimedia-based Teaching Materials to improve the quality of learning of teachers at Primary Schools in Rancabolang Gedebage Bandung. 3) Training on making graphics to support Multimedia-based Teaching Materials. 4) Increasing students interest in reading with literacy based on the Learning Management System (LMS) at Elementary Schools in Rancabolang Gedebage Bandung. The target of this activity is the teachers and students at Rancabolang Elementary School. This activity output produces LMS for Digital Literacy.

Keywords
Literacy skills, Multimedia-based teaching materials, Digital literacy

Topic
Computer Science Education

Link: https://ifory.id/abstract/92Cha3EPKkGV

Corresponding Author
tommy tanu wijaya

Institutions
IKIP Siliwangi

Abstract
Abstract. The purpose of this research is to know the effect of learning media on the junior high school students- critical thinking skills on the topic of plane geometry by using hawgent dynamic mathematical software. The sample of this research would be 9th grade student in one of the junior high school in Cimahi with a total of 30 students in the school year of 2019/2020. The collection of the data is by using pre-test and post test to compare the critical thinking skills of the experimental class with the controlled class. The result of this research is that hawgent dynamic mathematical software boost the students- critical thinking skills and also comparing the increase of students- critical thinking skills on the topic of plane geometry.

Keywords
Hawgent dynamic mathematical software, plane geometry, junior high school

Topic
Mathematics Education

Link: https://ifory.id/abstract/M8n92mdJLYNT

Corresponding Author
Yerizon Yerizon

Institutions
Universitas Negeri Padang

Abstract
The ability of mathematical reasoning is one of the abilities that must be possessed by every student in mathematics learning.However, the 8th grade of mathematics in Junior High School number 2 Pariaman, students mathematical reasoning ability is not optimal.Discovery learning is one of the learning models that can improve the ability of mathematical reasoning.The purpose of this research is to see and describe the differences in the ability of students mathematical reasoning using discovery learning model with the ability of students mathematical reasoning using conventional learning.The type of this research is quasi-experiment with the Static Group Design. Based on data analysis the result of the last test that the ability of students mathematical reasoning using discovery learning model is better than the ability of students mathematical reasoning using conventional learning.

Keywords
Discovery Learning Model, Mathematics Learning, The Ability of Mathematical Reasoning.

Topic
Mathematics Education

Link: https://ifory.id/abstract/ep2FGH4EaTLb

Corresponding Author
Atika Zahara

Institutions
a) Department of Science Education, Universitas Pendidikan Indonesia,
Jl. Dr. Setiabudi 229, Bandung, 40154, Indonesia
*zaharaatika[at]gmail.com
b) Department of Physics Education, Universitas Pendidikan Indonesia,
Jl. Dr. Setiabudi 229, Bandung, 40154, Indonesia

Abstract
Education in Industrial Revolution 4.0 demand students to understand how they can use and correlate the knowledge to the real world. This fourth industrial revolution also needs students to know exactly whether, when, and where they can use the technology. The aim of this study was to investigate the influence of implementing discovery learning supported by Solar System Scope app on students- curiosity. The method used is a weak experiment. The one group pre-test post-test is used in this research as a research design. Participants were 31 7th grade students in one of Secondary School in Bandung, Indonesia. The result of students- curiosity after implement discovery learning supported by Solar System Scope app enhanced with N-Gain 0.38 which categorized as medium. The treatment also shows the highest improvement in science and embrace aspects with N-Gain 0.39 which categorized as medium. Meanwhile, the lowest improvement of students- curiosity is stretch aspect with N-Gain 0.32 which categorized as medium. Based on the results showed that discovery learning supported by Solar System Scope app can be an alternative learning tool to enhance students- curiosity.

Keywords
Discovery Learning, Solar System Scope app, Students- Curiosity, Solar System

Topic
Integrated Science Education

Link: https://ifory.id/abstract/LtM8BzD3REHW

Corresponding Author
Dino Rahardiyan

Institutions
a)Dino Rahardiyan, b)Jantje Ngangi, c)Emma Mauren Moko, d)Aser Yalindua, e)Meity Neltje Tanor, f)Sukmarayu Pieter Gedoan
a)Agribusiness Department, Faculty of Agricultural, De La Salle Catholic University, Manado, 95000, Indonesia, drahardiyan[at]unikadelasalle.ac.id

b,c,d,e,f) Biology Department, Mathematics and Natural Sciences Faculty, Manado State University

Abstract
Locally known as Dalugha (Cyrtosperma merkusii) or namely Giant Swamp Taro (GST) is an endemic underutilized foodcrop of North Sulawesi, that is important amongst the surrounding island dwellers of Sangihe, Talaud and other surrounding islands. In accordance to the Indonesian government-s policy in regards with food security and resilience. The purpose of this research is to record the growth of GST in its natural habitat and its morphological characteristics. Initial surveys within this study indicated that the natural habitat of GST is widely spread in several island among the regencies of Siau and Tagulandang, Sangihe, and Talaud to the farthest island of Miangas bordering North Sulawesi and Southern Philippines. On the mainland of North Sulawesi GST is also found in brackish swamps nearing the shorelines of Tiwoho village, in the North Minahasa Regency. Morphologically GST that was found in these areas were measured and identified while he characteristics of the soil in which is the natural habitat of GST were also analyzed for their chemical compositions.

Keywords
natural habitat, growth environment, morphological characteristics, Cyrtosperma merkusii, staple food crop

Topic
Biology

Link: https://ifory.id/abstract/MZgFGxz3TYqm

Corresponding Author
Tatang Muhtar

Institutions
Universitas Pendidikan Indonesia

Abstract
The utilization of Information and Communication Technology for the millennials is a requirement, one of which is in the learning of Physical Education (Penjas – Pendidikan Jasmani). The teachers are expected to develop the competencies in the mastery and utilization of ICT in the learning process. Therefore, this research aims at exploring the prospective physical education teachers- skills in the utilization of ICT in the process of physical education learning as an effort to instill healthy lifestyle behavior into prospective physical education teachers by using an Android-based 30 Day Fitness Challenge application.. The procedure of this research are: 1) searching the application, 2) understanding of the application, 3) conducting learning process through the application and 4) evaluating of the learning outcomes. This research was conducted in one of the universities in Sumedang Regency by involving 100 students of prospective physical education teachers, consisting of 65 male students and 35 female students. The findings revealed that the use of this application had an effect on healthy lifestyle behavior with the indicators, for example, 1) the subjects had the understanding of the steps in instilling healhy lifestyle behavior, 2) the increase in motivation affected the importance of healthy lifestyle behavior, and 3) the subjects were getting used to conduct sport activities through this application. Therefore the utilization of the 30 Day Fitness Challenge application was able to instill the healthy lifestyle character in the prospective physical education teachers in Sumedang Regency.

Keywords
Android-based application, healthy lifestyle behavior, physical education

Topic
Computer Science Education

Link: https://ifory.id/abstract/xvW9XCqZJn7R

Corresponding Author
Riezky Probosari

Institutions
Sebelas Maret University

Abstract
This research was conducted to validate and interpret 80-item tests of scientific argumentation skills. The tests tested covered some aspects of argumentation test based on Toulmin Argumentation Pattern (TAP). Fifty three students on their third semester in Biology Education Study Program in Central Java, Indonesia, have participated in this research. The Winsteps software program version 3.73 was used to conduct the Rasch analyses in this research. The results showed that (1) the majority of items displayed match the Rasch model, In the summary of the person response pattern, the infit value and mean square outfit are 1.0 or perfect, infit and z-std outfit are close to the ideal value of 0.0. Person reliability 0.73, means that the consistency of student responses is quite good and items reliability 0.83 means the quality of the items is good. Cronbach alpha value is 0.77, means that the interaction between person and item is good. It also showed the difficulty level of the items given: difficult, medium and easy. It can be said that the instrument can measure students argumentation abilities in every aspect.

Keywords
Argumentation, TAP, Rasch model, assessment

Topic
Biology Education

Link: https://ifory.id/abstract/yRmxdHcPEpuX

Corresponding Author
Diah Kusumawaty

Institutions
Prodi Biologi Departemen Pendidikan Biologi FPMIPA Universitas Pendidikan Indonesia, Jalan Dr. Setiabudi no 229 Bandung 40154 Indonesia
*diah.kusumawaty[at]upi.edu

Abstract
Housekeeping gene are effective genes needed in cell maintenance and often used as internal controls in gene expression normalization because of their stable nature. However, information from the housekeeping gene especially on Anguilla bicolor is unknown. In relation that, this study aims to isolate and sequencing housekeeping of Anguilla bicolor by designing degenerate primer. 18s ribosomal proteins (18S rRNA), Beta Actin (ACTB), Elongation Factor 1-Alpha (ef1a) and Glyceraldehyde-3-Phosphate Dehydrogenase (GAPDH). The degenerate primer consists of two primer sets (outer and inner) were designed by: (1) Collection fish sequences of Actinopterygii class; (2) Aligment sequences; (3) Uploading sequences to the Primaclade web; (4) Selection of primary pairs. The selected primers were then used to amplify housekeeping gene Anguilla bicolor using the Nested PCR method. DNA of Anguilla bicolor was obtained from DNA isolation using the Sambrook protocol. The result of housekeeping gene amplification was then sequenced directly to determine the nucleotide sequences of the gene sequences. Next, contig and BLAST analysis are performed on the gene sequences obtained to ensure that the sequences match the target genes. The results of BLAST analysis showed that the three of four genes sequences were corresponding to the target gene, those are ribosome protein 18s (18S rRNA), Beta Actin (ACTB) and Elongation Factor 1-Alpha (ef1a). The general grouping of dendrograms showed that the three gene sequences were in groups with gene target. The conclusion of this study is the discovery of three specific sequences which can be used as a source for designing specific primers in subsequent studies.

Keywords
Anguilla bicolor, Housekeeping gene, Degenerate Primer, Nested PCR, Specific Primer.

Topic
Biology

Link: https://ifory.id/abstract/uVLN24PgyrM7

Corresponding Author
Wahidah Sanusi

Institutions
a) Department of Mathematics, Universitas Negeri Makassar, Parangtambung, Makassar, 90224, Indonesia
*wahidah.sanusi[at]unm.ac.id
b) Department of Statistics, Universitas Negeri Makassar, Parangtambung, Makassar, 90224, Indonesia

Abstract
A multivariate analysis on rainfall variables is needed to understand relationships among characteristics of rainfall variables. The monthly rainfall amount records from three stations during the period of 1985-2014 in Makassar are used. The Standardized Precipitation Index is employed to classify data into wet category. The aim of this study is to investigate the most appropriate joint probability distribution function of wet duration and wet severity based on bivariate Archimedean copulas. The copulas are Gumbel-Hourgaard, Frank, Joe, and Clayton. Parameter of copulas are estimated by Kendall-s tau correlation coefficient. The study result show that the Frank copula was identified as the best copula in joint modelling between wet duration and wet severity at MMP and BRP stations, meanwhile the Gumbel-Hougaard copula at BBMKG station. This results could be useful information for determining return periods of wet condition characteristics.

Keywords
Bivariate distributions; copula; wet duration; wet severity

Topic
Mathematics

Link: https://ifory.id/abstract/PtvBgbUGx8nm

Corresponding Author
Suwardi Annas

Institutions
a) Department of Statistics, Universitas Negeri Makassar
Jalan Mallengkeri, Makassar 90224, Indonesia
*suwardi_annas[at]unm.ac.id

Abstract
The number of natural disasters in Indonesia is very high occurrences. However, the data collected based on natural disasters has a complexity data structure. One of the efforts to make prevention by grouping the areas of natural disaster. The proposed methods to analyze the data are k-means and Geographical Information System (GIS). The k-means method has mapped the areas of natural disaster based on districts into 3, 4, 5, 6 and 7 of clusters. This result showed that the best cluster resulted by 7 of clusters with the smallest root mean square standard deviation (RMSD) than other clusters. Although k-means has obtained the best cluster, however, it was difficult to present the clustering of natural disaster districts in the map. Therefore, a GIS method was used to improve the cluster visualization of k-means. The main purpose of GIS is to develop a visual map of the natural disaster districts according to a given cluster of the k-means. GIS method can be a useful tool to improve the visualization information of k-means clustering and enables interpretation of the disparities of natural disaster by districts in Indonesia.

Keywords
GIS; k-means; Natural disaster; RMSD

Topic
Mathematics

Link: https://ifory.id/abstract/3xpPWQ6Rd4z2

Corresponding Author
Novi Sofia Fitriasari

Institutions
a)Program Studi Sistem Informasi Kelautan Kampus Universitas Pendidikan Indonesia di Serang, Jl.Ciracas Nomor 18, Serang 42116, Indonesia
b) Program Studi Pendidikan Guru dan Anak Usia Dini Kampus Universitas Pendidikan Indonesia di Serang, Jl.Ciracas Nomor 18, Serang 42116, Indonesia

Abstract
Kahoot is an internet-based application that can be used to evaluate learning in the classroom. The advantages of kahoot from other learning evaluation applications are packaged in the form of a game. Learning in the form of a game or what is called gamification has at least 3 elements, namely Game based rules, Game mechanics level and Game thinking competition. Therefore in this study discuss more details about kahoot seen from the Taxonomy of gamification element perspective.

Keywords
Kahoot, Gamification, Game Based Rules, Game Mechanics Level, Game Thinking Competition

Topic
Computer Science Education

Link: https://ifory.id/abstract/TxW2g7v9Yjmr

Corresponding Author
Yaya Wihardi

Institutions
Universitas Pendidikan Indonesia

Abstract
In this research, we present a low cost motion capture system for 3D character animation by utilizing RGB-D sensor such as Kinect. The system capture the human motion and apply it on a 3D character. Animated 3D character recorded by a 3D animator environment and rendered as a part of animation production. In order to evaluate time execution of the system, we compare two rotation methods: Euler and Quaternion. The result show that Quaternion more efficient than Euler.

Keywords
motion capture, animation, Kinect

Topic
Computer Science

Link: https://ifory.id/abstract/rNW97Ptw2gKd

Corresponding Author
Iskandar Muda Purwaamijaya

Institutions
Universitas Pendidikan Indonesia

Abstract
Abstract. The aim of research were: (1) making conceptual, functional model and implementing land suitability evaluation for housing and residential based on GIS, satellite imgery and DTM, (2) creating data base management system of land suitability evaluation for housing and residential based on GIS, satellite imagery and DTM, (3) producing thematic map of land suitability evaluation for housing and residential based on GIS, satellite imagery and DTM. Research location was in Bogor district. The research was conducted on January 2019 to July 2019. The research is using descriptive method. The research population is physical, chemical, biological and environmental conditions. The sampling technique is purposive. Research instruments are measurement and mapping tools, questionnaires, observations, computer hardware and software. Primary data taken by physical, chemical and biological environment. Secondary data taken are maps of soil texture, soil drainage, soil type, erosion, slope, effective depth of soil and flooding. Spatial analysis is used to superimpose layers, using GIS software. Themathic map which was producing land suitability evaluation for housing and residential based on GIS, satellite imagery, DTM from GIS software and satellite imagery from internet could be more accurate and effective than conventional and analog method.

Keywords
land suitability evaluation, housing and residential, GIS, satellite imagery, DTM

Topic
Computer Science

Link: https://ifory.id/abstract/bjJVuaU9pmW6

Corresponding Author
Afi Fadlilah

Institutions
(a) Universitas Pendidikan Indonesia; (b) Universitas Pendidikan Indonesia; (c) Universitas Islam Bandung

Abstract
The world of technology is increasingly sophisticated so that science is required to keep up with its developments, including the problem of language mapping. ArchGis software is a technology tool that can be used to map languages in certain regions. This study aims to utilize ArcGIS software in dialectology practice. The method in this study is divided into several stages: first, the stages of installing ArchGis software onto a student laptop; Second, the stages of providing language alignment data to students; third, the stage of introducing ArchGis software and how to use it to students; and fourth, the stages of practicing ArchGis software in mapping languages. The subjects in this study were undergraduate students (S1) in the sixth semester of the Indonesian language and literature study program at Universitas Pendidikan Indonesia Bandung, Indonesia. The results of this study students feel helped and very enthusiastic about learning dialectology courses by utilizing ArchGis software as a learning media because it is very effectively used to map languages. The conclusion of this study is that ArchGis software is an effective tool for retrieving practical data on dialectology research.

Keywords
Language mapping, ArcGIS Software, and Dialectology.

Topic
Computer Science

Link: https://ifory.id/abstract/HNqnk2t9RWVP

Corresponding Author
Armiati Armiati

Institutions
Universitas Negeri Padang

Abstract
This paper discusses about of designing mathematics learning for technology vocational school students. The two-variable linear equation system is one of the topics taught to students in vocational schools. Learning the topic of two-variable linear equation systems has been designed by linking problems to the mechanical and automotive engineering expertise program. This is done so students are aware of the need to learn mathematics, especially SPLDV material. This learning design has been developed through a research development involving 42 students from SMK 1 Padang. Data was collected through observation, interviews, field notes and analysis of test results. The results of this study indicate that the SPLDV learning design linking problems to the mechanical engineering expertise program can help students develop their problem mathematics skills. Through this research it is also known that this learning design has also been able to increase the interest of vocational school students towards mathematics.

Keywords
learning design, mathematics communication, two-variable linear equation systems, vocational high school

Topic
Mathematics Education

Link: https://ifory.id/abstract/b6tCVGTUanFz

Corresponding Author
Inne Marthyane Pratiwi

Institutions
Universitas Islam Negeri Sunan Gunung Djati Bandung

Abstract
Mathematical communication skill are very important for the students of Madrasah Ibtidaiyah. Students who have good mathematical communication skill are able to express and accept mathematical ideas carefully, analytically, critically and evaluatively so they will understand mathematical concepts. This study aims to identify the learning obstacles faced by students in mathematical communication skill in the volume of cubes and beams subject. This research was part of the Didactical Design Research (DDR) conducted at one of the Madrasah Ibtidaiyah in Bandung Regency. Research participants were 13 of sixth grade students. Data collection is done by test, interview, and observation. Based on the research, we found difficulties faced by students in mathematical communication skill on volume of cubes and beams subject which are categorized into ontological, didactical, and epistemological obstacle. For this reason, further research is needed in the form of learning design to overcome the learning obstacle.

Keywords
earning obstacle, madrasah ibtidaiyah, mathematical communication skill, volume of cubes and beam

Topic
Mathematics Education

Link: https://ifory.id/abstract/TJZgvfqzAHtx

Corresponding Author
Harsa Wara Prabawa

Institutions
Universitas Pendidikan Indonesia

Abstract
Learning process in Vocational High Schools (SMK) has different characteristics from public schools which is more focused on productive subjects or practices. This condition is a particular obstacle, especially if students are confronted with material that tends to be conceptual, such as a Computer System. Computer System Material is material that studies the concepts of mathematical calculations that occur in the computing process. The inaccuracy of student knowledge on the basic concepts of Computer Systems will have an impact on the mastery of the material in other learning. This study tries to develop a learning type of simulation type because theoretically simulation is considered more effective in helping students with high levels of anxiety in understanding a topic because it presents a series of contextual objects/content that demands student involvement in conducting experiments. This simulation media was tested on 84 Vocational High School students in the IT field in several schools in the city of Bandung. From three times of media testing, the results are obtained that the simulation media can make students better understand the concept of abstract logic material because the material is visualized by simulations on electric circuit illustrations that are made as if the user is in a real situation. Nevertheless, the simulation media still need to be improved, especially in terms of the scenario of the presentation of the exercise and the complexity of the cases presented.

Keywords
Simulation, logic gate, computer system

Topic
Computer Science Education

Link: https://ifory.id/abstract/yLrPX2kwJAfD

Corresponding Author
Herbert Siregar

Institutions
UPI

Abstract
Determination of the right location of vehicle tax payment center is very important due to an increase in the number of vehicle, and the limitation of its facilties and officers. Moreover, the distribution of taxpayer residential is uneven. This research proposed an alternative method to determine the right location by using K-Means clustering algorithm. In order to get the fixed cluster and the optimun one, we cluster 1,031 geolocation (latitude and longitude) of respondence and evaluate it by using silhouette coefficient. The result show that our cluster have a good consistency.

Keywords
clustering, K-Means, vehicle tax payment, fixed cluster, optimum cluster

Topic
Computer Science

Link: https://ifory.id/abstract/gyYqbmFRdfL3

Corresponding Author
Harsa Wara Prabawa

Institutions
Universitas Pendidikan Indonesia

Abstract
The interest of Vocational High School students in learning theoretical material that is not from their field of expertise is very low. This is partly because students consider the material not directly related to the skills needed in their vocational fields. contextual material that seems absurd, because it is sometimes taught without the help of adequate media and practical activities, is another reason for the lack of student interest in this material. This research aims to build an educational game that can be used as a learning aid, especially in the material of logic and computer algorithms; and measuring the effectiveness of the use of educational games on increasing student understanding. This research is development research, in which media prototype design is tested several times to different subjects to get a media design that suits your needs. in relation to understanding, the media was tested on 103 students in one of the non-IT Vocational High Schools in the Bandung City area. From the results of this study note that in general, students gave very good responses regarding this educational game. The majority of students think that this game is interesting, and can help provide understanding and increase student motivation. however, this educational game is only able to help students understand at the low order level of thinking. for more complex problem-solving cases, other media assistance is needed in constructing student understanding to a higher level.

Keywords
Educational Game, logic and computer algorithms

Topic
Computer Science Education

Link: https://ifory.id/abstract/8dZucryWh9Ce

Corresponding Author
Anna Rachmadyana Harry

Institutions
Universitas Pendidikan Indonesia

Abstract
The purpose of the research carried out is to describe the classification of the level of mathematical abstraction ability in the material sequence and series in terms of the cognitive style of the students, examine the relationship between mathematical level abstractions and students cognitive styles, and find out the errors experienced by students in completing questions about mathematical abstraction ability in the sequence and series material in terms of cognitive style. This research is a descriptive study using a qualitative approach. The subject of this study was obtained by carrying out cognitive style tests using instruments MFFT (Matching Familiar Figures Test) developed by Warli (2010) and the test questions of mathematical abstraction abilities are arranged based on levels and indicators of mathematical abstraction developed by Fitriani (2018) which was attended by 31 grade XI students from one of the high schools in Bandung city. The MFFT cognitive style test results group students into 4 cognitive style groups, namely impulsive (I), reflective (R), impulsive and reflective (IR), and not impulsive and not reflective (TITR). Mathematical abstraction abilities are divided into 4 levels, level 1 perceptual abstraction, level 2 internalization, level 3 interiorization, and level 4 second level of interiorization. The results of the students mathematical abstraction ability test show that student I is at level 1 transition, level 2 complete, level 3 transitions, and level 4 transitions, and complete level in question 5. Student R is at complete level for level 1 questions, transition level for level 2 questions, complete level for level 3 and transition level for level 4, and complete level for question 5. Students IR are at the complete level for all levels 1 to level 4 and questions number 5. TITR students are at level 1 complete, level 2 transitions, complete level 3, level 4 transitions, and do not get the achievement of question 5. Linkages were found between the level of mathematical abstraction and the cognitive style of IR. Several types of errors are found when students solve mathematical abstraction questions including the category of error CE (Comprehension Error), TE (Transformation Error), PSE (Process Skill Error), and EE (Econding Error).

Keywords
mathematical abstraction, sequences and series, cognitive style, student mistakes, Newmans theory

Topic
Mathematics Education

Link: https://ifory.id/abstract/C4XxemzhtTuK

Corresponding Author
Arif Sunaryo

Institutions
IKIP Siliwangi

Abstract
There are still many students who have difficulty in learning mathematics about the matter of changing ordinary fractions into mixed fraction forms because students do not understand the provisions that are the basis of how ordinary fractions can be transformed into mixed fractions. That is still not able to distinguish the definitions of the numerator and the denominator in fractions, besides that students have not been able to interpret the form of fractions correctly in terms of the fundamental ability of understanding the mathematical thinking process. The benefit of VBA for Excel elementary school is to associate mathematical concepts from fractional material that can help students understand the thinking process in visual form. The development of technology now makes the media more efficient and faster, therefore with the help of technology, a teacher or teacher can make a lot of media that is tailored to the needs of teaching in the classroom. The method used in media development uses ADDIE (Analysis of Design Development Implementation and Evaluation). And the feasibility of instructional media from the assessment of media experts and material experts. Before carrying out implementation in class, the media and material are assessed by users or elementary school mathematics teacher to get a questionnaire assessment and enter the evaluation as a media improvement that will be implemented to students.

Keywords
Understanding Ability, VBA for Excel, ordinary fractions, mixture fractions

Topic
Mathematics Education

Link: https://ifory.id/abstract/FLcmAwdKbghY

Corresponding Author
Shofi Dhiya Ulhaq

Institutions
Departemen Pendidikan Fisika, Universitas Pendidikan Indonesia, Bandung 40154, Indonesia

Abstract
Metal oxide semiconductor field effect transistors (MOSFETs) has an important role in electric circuits with its nanoscale sizes. But with its small size, MOSFETs have performance limitation to work in ultra-low data, leaky currents, short channel effects, and increased speed. This performance limitation makes the tunneling field effect transistor (TFET) an alternative to replace the MOSFET. In this study, a drain current on devices based on bilayer armchair graphene nanoribbon (BAGNR) was modeled using the Airy function approach. Schrödinger equation solved with the Airy function approach produces a transmittance value, from this transmittance the drain current value can be determined from the Landauer formula with the help of the Gauss Legendre Quadrature (GLQ) method. The results of the modeling show that the drain current value increases with increasing gate voltage (Vg), drain voltage (Vd) and width of BAGNR while the increase in oxide thickness and temperature makes the drain current decrease.

Keywords
Airy−wavefunction, tunneling current, BAGNR, TFET.

Topic
Physics

Link: https://ifory.id/abstract/R89bVEAf62Bq

Corresponding Author
Amelia Fadhillah

Institutions
Department of Physics Education, Universitas Pendidikan Indonesia, Bandung, Jawa Barat, Indonesia

Abstract
Armchair Graphene Nanoribbon (AGNR) is one of the Graphene Nanoribbon (GNR)-s type which can be role as a semiconductor or conductor depends on number of atoms that arrange its width . The unique of the electrical properties of AGNR attracted researchers to make graphene as material of semiconductor based device. Because of its tiny width, graphene is very good for application on devices with tunneling electron based. In this research, the author models the behavior of tunneling current on a bilayer armchair graphene nanoribbon-based p-n junction diode using Airy function. The modeling-s result show that the tunneling current has relation with bias voltage, temperature, and characteristic of BAGNR. The tunneling current is directly proportional to the forward-bias, the width of the BAGNR, and the intrinsic electric field. It is inversely proportional to the temperature. Its value on BAGNR is bigger than on MAGNR due to the effect of interlayer coupling γ_0 and γ_1 to the energi gap. The tunneling current using the Airy function method and the WKB method have the same tendency and slight different value.

Keywords
BAGNR, p-n junction diode, tunneling current, Airy function

Topic
Physics

Link: https://ifory.id/abstract/87dTaXgtzJKx

Corresponding Author
Henry Setiyanto

Institutions
1Analytical Chemistry Research Group, Institut Teknologi Bandung, Bandung, Indonesia
2Research Unit for Clean Technology, Indonesian Institute of Sciences, Bandung, Indonesia
3Department of Physics, Universitas Negeri Malang, Malang, Indonesia

Abstract
Phenol is an aromatic derivative of hydrocarbons from coal which used as a base for making plastic bottles, cans of packaged food, cosmetics, and pesticides. A large amount of phenol in industrial fields cause phenol easily found in water. However, this compound is emerging as a pollutant in the environment and cause harm to animals. Phenol is also known to be highly reactive to human body tissue if absorbed through skin, breathing, and digestion. In this work, carbon paste electrode based on Ag nanoparticle was developed for the detection of phenol. Carbon paste electrode was modified with Ag nanoparticles which were previously synthesized first and then mixed with graphite and paraffin. The best composition of CPE-nAg is 5:70:25 for Ag nanoparticles, graphite, and paraffin. After measurement using CPE-nAg, it is necessary to remove phenol on the electrode surface with 6 cyclic. Measurement was carried out using square wave voltammetry techniques in the potential range of 0 V to 1,2 V, frequency of 10 Hz, and a scan rate of 75 mV/s. The result showed the presence of an oxidation peak of phenol is 0,475 V in sodium hydroxide 1 M solution.

Keywords
CPE, Ag nanoparticles, voltammetric, phenol

Topic
Chemistry

Link: https://ifory.id/abstract/eNtUbAXZ7C49