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Edumatsains
Published by Universitas Kristen Indonesia
ISSN : 25277642     EISSN : 25277235     DOI : -
Core Subject : Science, Education, Agriculture,
Agriculture, Biological Sciences & Forestry Chemistry Education Mathematics Physics
Jurnal EduMatSains merupakan wadah untuk menampung dan mempublikasikan hasil karya baik berupa hasil penelitian maupun kajian teori yang original dalam ruang lingkup pendidikan matematika dan pendidikan sains (fisika, kimia, biologi) serta ilmu matematika dan ilmu sains (fisika, kimia, biologi) bagi semua civitas academika khususnya dosen, guru, peneliti dan mahasiswa. Jurnal EduMatSains terbit sebanyak dua kali dalam satu tahun (Juli dan Januari). Jurnal EduMatSains diterbitkan Oleh Fakultas Keguruan dan Ilmu Pendidikan, Universitas Kristen Indonesia.
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Articles 16 Documents
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Search results for , issue "Vol 7 No 2 (2023): Januari" : 16 Documents clear
Analisis Kesalahan Siswa dalam Menyelesaikan Soal Cerita SPLDV Berdasarkan Tahapan Newman Rahajeng Rahastiana Fimillatika; Haerudin Haerudin
EduMatSains : Jurnal Pendidikan, Matematika dan Sains Vol 7 No 2 (2023): Januari
Publisher : Fakultas Keguruan dan Ilmu Pendidikan, Universitas Kristen Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33541/edumatsains.v7i2.3720

Abstract

This study aims to observe the errors of class IX junior high school students in solving the problem of a two-variable system of linear equations in the form of a narrative math problem. The research subjects were 24 students of class IX. This research instrument uses 3 narrative mathematical problems of a two-variable linear equation system according to the Newman error analysis indicator. A qualitative descriptive approach was used in this study. The results obtained, some students have difficulty on indicators to solve problems involving a system of linear equations of two variables. Based on Newman's error analysis, the causes of student errors in solving two-variable linear equation system narrative math problems are: (1) 35% for reading errors in the very low category are caused by difficulties in interpreting the meaning of words or terms in the problem; (2) 61% for comprehension errors in the low category due to students not writing down the known and asked elements; (3) 50% for transformation errors in the very low category is due to difficulties in determining procedures and formulas; (4) 59% for process skill errors in the low category caused by errors in the calculation process; and (5) 58% for encoding errors in the low category were caused by students not writing conclusions.
Kemampuan Pemahaman Konsep Matematis Siswa dalam Menyelesaikan Soal pada Relasi dan Fungsi Melinda Rismawati; Anita Sri Rejeki Hutagaol; Veronika Andau; Yopita Yopita
EduMatSains : Jurnal Pendidikan, Matematika dan Sains Vol 7 No 2 (2023): Januari
Publisher : Fakultas Keguruan dan Ilmu Pendidikan, Universitas Kristen Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33541/edumatsains.v7i2.3979

Abstract

The purpose of this study was to analyze the achievement of each indicator that measures the mathematical understanding ability of high school students in the learning of Relations and Functions. This research is a qualitative descriptive study that seeks to describe students' mathematical understanding abilities. The subjects of this study were 10th Grade students in SMAN 2 Sintang which consisted of 30 students. The data collection method used is a matter of test material relations and functions. Based on the results of the study, it can be concluded that the level of ability of students in high school mathematics subjects is as follows: there is 1 student who scores below 50, there are 3 students who score between 51 and 60, there are 8 students who score between 61 and 70, there are 9 students scored between 71 and 80, there were 9 students who scored 81 and above. The perfect score was achieved by 30 students in the first question number. All partisipants got different results, the first indicator of students getting the fulfillment of the indicator of ability to understand concepts with very good categories, the second indicator of the fulfillment of indicators of understanding ability concept with sufficient category and the third indicator students get the fulfillment of the indicator of ability to understand concepts with very poor category. It can be said that students still have difficulty in solving problems in the form of distinguishing examples from non-examples and solving problems using concepts when solving problems.
Model Pembelajaran RADEC (Read, Answer, Discuss, Explain, and Create) Ditinjau dari Perspektif Pembentukan Profil Pelajar Pancasila Nursida Sutantri; Wahyu Sopandi; Wawan Wahyu; Abdul Latip
EduMatSains : Jurnal Pendidikan, Matematika dan Sains Vol 7 No 2 (2023): Januari
Publisher : Fakultas Keguruan dan Ilmu Pendidikan, Universitas Kristen Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33541/edumatsains.v7i2.4045

Abstract

The independent curriculum policy emphasizes the development of the Pancasila student profile students through the learning process carried out by teachers and students. This study aims to describe the application of the RADEC learning model in chemistry learning to form a profile of Pancasila students in students. This study uses a qualitative descriptive approach involving one teacher and 34 students of class XII MIPA who carry out learning chemistry for voltaic cells. The research instrument was an observation sheet on the appearance of the Pancasila student profile, which the observer used as a reference in observing the learning process. The results showed that, in general, the profiles of Pancasila students, namely Faith and Faith in God Almighty and Noble Morals, Global Diversity, Mutual Cooperation, Independent, Critical and Creative Reasoning, were identified to have increased from the first meeting to the fourth meeting of learning and the syntax of the RADEC learning model could facilitate the formation and development of student profiles of Pancasila according to the characteristics of the characters and types of learning activities. The results of this study indicate that the RADEC learning model is one of the learning models that teachers can implement when viewed from the perspective of forming a Pancasila student profile.
Penerapan Algoritma Dijkstra pada Pendistribusian Bahan Bakar Minyak di Pontianak Riski Apriadi; Bayu Prihandono; Yundari Yundari
EduMatSains : Jurnal Pendidikan, Matematika dan Sains Vol 7 No 2 (2023): Januari
Publisher : Fakultas Keguruan dan Ilmu Pendidikan, Universitas Kristen Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33541/edumatsains.v7i2.4149

Abstract

Determination of the shortest path or the fastest travel time is a problem that occurs to drivers of trucks loaded with fuel oil (BBM) when delivering their tanks to one of the public refueling stations (SPBU) in Pal Lima. To get to the destination, several paths that can be passed. This study aims to determine the shortest path and fastest travel time using Dijkstra's algorithm. Dijkstra's algorithm can be used on both directed and weighted graphs. The first step that must be done is to determine the starting node and destination node. After that, the calculation is carried out from the initial departure node to the neighboring node, the node with the smallest weight is used as the next calculation node. The same is done until all nodes are evaluated. Crossroads are assumed as vertices and between intersections as edges in Dijkstra's algorithm. From the results of the study, the shortest path was obtained through the Kapuas 2 Toll Road, Jl. Adi Sucipto, Jl. Imam Bonjol, Jl. Tanjung Pura, Jl. Rahadi, Jl. Mr. Love, Jl. Hassanudin, Jl. H. Rais, Pal III, Pal V with a minimum distance of 12,768 Km. For the fastest route, it is through the Kapuas 2 Toll Road, Jl. Major Alianyang, Jl. Arteri Supadio, Jl. General Ayani, Jl. Abdurrahman, Jl. Sultan Syahrir, Dr. Sutomo, Jl. Dr. Wahidin, Jl. Pal V with the fastest travel time of 27 minutes.
Teorema Titik Tetap untuk Pemetaan Kannan dan Chatterjea pada Ruang Metrik Modular Bernilai Kompleks Mariatul Kiftiah; Yudhi Yudhi
EduMatSains : Jurnal Pendidikan, Matematika dan Sains Vol 7 No 2 (2023): Januari
Publisher : Fakultas Keguruan dan Ilmu Pendidikan, Universitas Kristen Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33541/edumatsains.v7i2.4219

Abstract

In this paper, inspired by fixed point concepts of complex valued modular metric space, we introduce Kannan complex and Chatterjea complex mappings. Using this new idea, some fixed point theorems involving both of these contractive mappings are established. Furthermore, existence and uniqueness of fixed point for Kannan complex and Chatterjea complex mappings on complex valued modular metric space is proved.
Penerapan Metode Continuous Review pada Pusat Oleh-Oleh Keripik Rumah Adat Minang Nella Oktavia Rani Br Sirait; Putri Khairiah Nasution
EduMatSains : Jurnal Pendidikan, Matematika dan Sains Vol 7 No 2 (2023): Januari
Publisher : Fakultas Keguruan dan Ilmu Pendidikan, Universitas Kristen Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33541/edumatsains.v7i2.4282

Abstract

Pusat Oleh-Oleh Keripik Rumah Adat Minang is a business engaged in the production of sweet potato chips, and selling various types of snacks, this business is located in Medan City, North Sumatra. This study aims to compare the total inventory costs of the company's policies and the Continuous Review method and determine the optimal order size. The data obtained is inventory data for 5 types of snacks in 2021. The method used is the continuous review method, based on the results of calculations for 5 types of snacks, the total inventory cost according to company policy is Rp.792,631,977/year, while the total inventory cost using the continuous review method is Rp.773.799,089/year. The results showed that the continuous review method has an optimal total inventory cost, so the company can save on expenses of Rp. 18,832,888 or 2,37% for 5 types of snacks. To facilitate the calculation in this study was conducted using the help of MATLAB software.
Analisis Sistem Antrian pada Bank Negara Indonesia Kantor Cabang Kawasan Industri Medan Paskah Riny Sirait; Parapat Gultom
EduMatSains : Jurnal Pendidikan, Matematika dan Sains Vol 7 No 2 (2023): Januari
Publisher : Fakultas Keguruan dan Ilmu Pendidikan, Universitas Kristen Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33541/edumatsains.v7i2.4283

Abstract

The problem that occurs at Bank Negara Indonesia of Medan Industrial Area Branch Office is the occurrence of unemployed tellers at certain hours. The purpose of this study is to determine the queue system at Bank Negara Indonesia of Medan Industrial Area Branch Office and to find out the optimal number of tellers at the bank. The structure of the queue model that occurs at Bank Negara Indonesia of The Medan Industrial Area Branch Office is a Multi Channel-Single Phase by applying the discipline of the First Come First Serve queue. The bank has 4 tellers with an average customer arrival value (λ) of 20 people per hour and an average service level (μ) of 22 people per hour. The results of data processing show the arrival pattern of Poisson-distributed customers and the general distribution service pattern. This study resulted in a queueing model (M / G / 4): (FCFS / ∞ / ∞). The optimal number of tellers in providing customer service is to reduce 1 teller. Based on the calculation results with only 3 tellers, it can reduce the probability of the teller being unemployed from the initial one by 40.25% to 39.97%.
Analisis Kesalahan dalam Menyelesaikan Soal Trigonometri pada Siswa Kelas X SMA Ekasakti Padang Dina Novarina Perdana; Khurnia Budi Utami
EduMatSains : Jurnal Pendidikan, Matematika dan Sains Vol 7 No 2 (2023): Januari
Publisher : Fakultas Keguruan dan Ilmu Pendidikan, Universitas Kristen Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33541/edumatsains.v7i2.4328

Abstract

This research is motivated by the number of students who make errors in solving trigonometry problems. This can be seen from the low average value of daily trigonometry tests for class X students of SMA Ekasakti Padang in the 2021/2022 school year. Teachers were necessary to know in advance what caused the student's mistakes. This study aims to (1) determine the causes of errors in class X SMA Ekasakti Padang in solving trigonometry problems, and (2) determine the percentage of errors made by class X students at SMA Ekasakti Padang in solving trigonometry questions. This type of research is descriptive. The research subjects in this study were students of class X SMA Ekasakti Padang. Data analysis in this study was divided into two, namely (1) written test results data were analyzed by calculating the percentage of students who made mistakes in solving trigonometric questions, and (2) interview data analysis was carried out by reducing data, presenting data, and concluding. The mistakes made by students in solving trigonometry problems are conceptual errors and algorithm errors. Conceptual errors were made by 83.33% of students, where the most incorrect concept was the triangle concept. Furthermore, the principle error is 66.67%, and the algorithm error is 50%. The causes of errors made by students in solving trigonometry problems are carelessness and haste, poor understanding of students on questions, lack of understanding of prerequisite concepts related to questions, and interpretation of the meaning of the questions incorrectly or incorrectly in reading the questions.
Validitas Media Pembelajaran Matematika Menggunakan Aplikasi Powtoon Nela Sari Yolanda; Niscaya Laia
EduMatSains : Jurnal Pendidikan, Matematika dan Sains Vol 7 No 2 (2023): Januari
Publisher : Fakultas Keguruan dan Ilmu Pendidikan, Universitas Kristen Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33541/edumatsains.v7i2.4354

Abstract

The role of learning media in the learning and teaching process is an integral part that cannot be separated from the world of education. Learning media is anything that can be used to channel messages from senders to recipients, so that they can stimulate students' thoughts, feelings, concerns, and interests to learn. Seeing the importance of media in learning, it is necessary to develop learning media that are valid and suitable for use in the learning process. In an effort to develop learning media, validation is carried out on the media that is being developed, the purpose of validating is to find out and correct errors that exist in the learning media being developed. This study aims to determine the validity of mathematics learning media using the powtoon application. This type of research is research and development (Research and Development). Based on the results of the validation, it shows that the learning media developed is valid, it can be seen from the results of the validity given by the experts (validators), both subject matter experts and language experts. The validation results obtained were 81% for material aspects and 90% for language aspects.
Keakurasian Metode Shooting untuk Menyelesaikan Masalah Kondisi Batas pada Persamaan Sturm-Liouville Ummu Habibah; Nielda Alifah Mulyanti
EduMatSains : Jurnal Pendidikan, Matematika dan Sains Vol 7 No 2 (2023): Januari
Publisher : Fakultas Keguruan dan Ilmu Pendidikan, Universitas Kristen Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33541/edumatsains.v7i2.4371

Abstract

Pada penelitian ini dibahas keakurasian metode shooting/tembakan untuk menyelesaikan masalah kondisi batas Dirichlet pada persamaan Sturm-Liouville yang berbentuk persamaan diferensial orde dua, dengan kondisi batas Dirichlet. Persamaan Sturm-Liouville diselesaikan numerik menggunakan metode shooting. Simulasi numerik dilakukan dengan beberapa nilai (ukuran langkah). Keakurasian metode shooting diperoleh dengan cara dibandingkan solusi numeriknya terhadap solusi eksak, serta dibandingkan dengan solusi numerik menggunakan metode beda hingga. Hasil simulasi menunjukkan bahwa metode tembakan (shooting) menghasilkan solusi numerik yang lebih baik untuk mengaproksimasi masalah kondisi batas pada persamaan Sturm-Liouville dibandingkan metode beda hingga karena menghasilkan kesalahan numerik yang lebih kecil.

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