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All Journal Jurnal Sains dan Teknologi AKSIOMA: Jurnal Program Studi Pendidikan Matematika JOIV : International Journal on Informatics Visualization ZERO : Jurnal Sains, Matematika dan Terapan JURNAL PENELITIAN PENDIDIKAN MIPA Zero : Jurnal Sains, Matematika, dan Terapan JISTech (Journal of Islamic Science and Technology) JURNAL PENDIDIKAN TAMBUSAI Jurnal Cendekia : Jurnal Pendidikan Matematika Journal on Education MAJU : Jurnal Ilmiah Pendidikan Matematika JOURNAL OF SCIENCE AND SOCIAL RESEARCH JURNAL MATHEMATIC PAEDAGOGIC MAJAMATH: Jurnal Matematika dan Pendidikan Matematika SAP (Susunan Artikel Pendidikan) JCRS (Journal of Community Research and Service) AMALIAH: JURNAL PENGABDIAN KEPADA MASYARAKAT ANARGYA: Jurnal Ilmiah Pendidikan Matematika Jurnal Eduscience (JES) JURNAL PEMBELAJARAN DAN MATEMATIKA SIGMA (JPMS) Indonesian Journal of Education and Mathematical Science G-Tech : Jurnal Teknologi Terapan Community Development Journal: Jurnal Pengabdian Masyarakat Journal of Didactic Mathematics Jurnal Lebesgue : Jurnal Ilmiah Pendidikan Matematika, Matematika dan Statistika Jurnal Abdimas Kartika Wijayakusuma Indo-MathEdu Intellectuals Journal Journal of Mathematics and Scientific Computing With Applications Journal of Information Systems and Technology Research Jurnal MathEducation Nusantara Jurnal Ilmiah Ilmu Terapan Universitas Jambi International Journal of Educational Research Excellence (IJERE) Majalah Ilmiah METHODA Jurnal Penelitian Pendidikan MIPA Jurnal Pengabdian Masyarakat dan Riset Pendidikan SAMBARA: Jurnal Pengabdian Kepada Masyarakat Media Pendidikan Matematika Edumaspul: Jurnal Pendidikan
Dedy Juliandri Panjaitan
Universitas Muslim Nusantara Al-Washliyah
Religion Agriculture, Biological Sciences & Forestry Arts Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Health Professions Immunology & microbiology Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Library & Information Science Materials Science & Nanotechnology Mathematics Medicine & Pharmacology Physics Public Health Social Sciences Other

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DECISION SUPPORT SYSTEM FOR DETERMINING SCHOLARSHIP RECIPIENTS USING TOPSIS FMADM METHOD Husein, Ismail; Juliandri, Dedy
ZERO: Jurnal Sains, Matematika dan Terapan Vol 1, No 1 (2017): January - June
Publisher : UIN Sumatera Utara

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (529.421 KB) | DOI: 10.30829/zero.v1i1.1454

Abstract

Granting scholarships to students aims to assist students in conducting lectures. Distribution of scholarships conducted by Muslim University Nusantara Al-Washliyah to help underprivileged or underachievers during their study The problem aims to choose some best alternative based on some attributes (criteria) used. In order to make decisions on fuzzy issues can be used Fuzzy Multiple AttributeDecision Making (FMADM). In this research modeling using Unified Modeling Language (UML) in FMADM with TOPSIS method and Weighted Product to select candidates of scholarship recipients.
Selection of online shopping with the electree method Panjaitan, Dedy Juliandri; Aprilia, Rima
ZERO: Jurnal Sains, Matematika dan Terapan Vol 4, No 2 (2020): Zero: Jurnal Sains Matematika dan Terapan
Publisher : UIN Sumatera Utara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30829/zero.v4i2.8990

Abstract

E-Commerce stands for Electronic Commerce which means a marketing system by means of electronic media. E-Commerce is defined as the process of buying and selling of products, services and information that is done electronically using a computer network. One form of e-commerce is online shopping. The purpose of this study is to determine the best online shopping based on predetermined criteria. The criteria used in E-Commerce are the price of goods, completeness of goods, shipping costs, quality of goods, and length of delivery time. The Electre method is a multi-criteria decision-making method based on the concept of outranking using pairwise comparisons of alternatives based on each appropriate criterion. Based on the analysis using the Electric method, it is recommended that the best online shopping is TOKOPEDIA which dominates other alternatives.
OPTIMIZATION OF PRODUCTION COSTS WITH SIMPLEX METHOD Firmansyah, Firmansyah; Panjaitan, Dedy Juliandri; Salayan, Madyunus; Silalahi, Alistraja Dison
Journal of Community Research and Service Vol. 4 No. 2: July 2020
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/jcrs.v4i2.15277

Abstract

One of the problems in the company is my resource limitation, the time of production and the tools used in the production process. Companies in making decisions in production planning in the presence of these limitations, should seek to maximize the profit generated. However, in the production process a production planning reference is required to maximize the results obtained and minimize the production costs used. To solve the problem, needed a problem solving tool that is linear program using simplex method. Simplex method is one of the methods of linear program in solving the problem of more than two variables that can be applied into everyday life and can be used in production process planning. With one of the ultimate goal is the achievement of the optimum value with the constraints of limited resources. The results of the simplex method have decreased costs incurred less than the usual costs incurred every month and the results obtained using the simplex method can be used as a reference in making decisions to get optimal results on production costs in the company.
Pengaruh penggunaan media sosial youtube terhadap motivasi belajar matematika dan self-efficacy siswa menggunakan kurikulum merdeka belajar pada siswa kelas X di SMK Negeri Kota Medan Saragih, Jenri Hamonangan; Panjaitan, Dedy Juliandri
Journal of Didactic Mathematics Vol 4, No 3 (2023): December
Publisher : Mahesa Research Center

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34007/jdm.v4i3.1862

Abstract

A curriculum is a plan that guides teaching and learning process activities. The Merdeka Curriculum is a curriculum with diverse extracurricular learning where the content will be more optimal so that students have enough time to deepen concepts and strengthen competencies. This research aims to measure whether there is an influence of YouTube learning media on students' mathematics learning motivation and self-efficacy. This research was conducted using a mixed method by providing questionnaires and instrument questions to research subjects using multiple regression analysis tests. The research results show that there is an influence of using YouTube learning media on student learning motivation by 57.9% and the influence of using YouTube learning media on student self-efficacy is 46.6%. There is an influence of using YouTube learning media on student learning motivation and self-efficacy. is 63.2%.
Profil Kemampuan Berpikir Kritis Siswa Field-Dependent dan Field-Independent dalam Menyelesaikan Persamaan Kuadrat Liza, Tasya Dwi; Zahari, Cut Latifah; Panjaitan, Dedy Juliandri
Media Pendidikan Matematika Vol. 13 No. 1 (2025)
Publisher : Universitas Pendidikan Mandalika (UNDIKMA)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/mpm.v13i1.15460

Abstract

The purpose of this study is to describe students' critical thinking skills in solving quadratic equation problems based on cognitive style. This research method uses a qualitative method using a cognitive style questionnaire and a critical thinking test. The subjects of this study were 6 students with field dependent cognitive styles and field independent cognitive styles. The results of the study stated that students who have a field dependent cognitive style cannot meet the critical thinking indicators because they cannot provide appropriate solutions. Students with a field independent cognitive style can meet all critical thinking indicators, namely interpretation, analysis, evaluation, and inference. Based on this study, it is necessary to train students' critical thinking skills by providing everyday problems by paying attention to the cognitive style possessed by students
Model Pembelajaran Problem Based Learning (PBL) terhadap Kemampuan Berpikir Kritis Matematis Waruwu, Nove Susanti; Destini, Rita; Juliandri, Dedy; Firmansyah, Firmansyah
Media Pendidikan Matematika Vol. 13 No. 1 (2025)
Publisher : Universitas Pendidikan Mandalika (UNDIKMA)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/mpm.v13i1.15745

Abstract

Penelitian bertujuan untuk mengetahui pengaruh model pembelajaran Problem Based Learning terhadap kemampuan berpikir kritis matematis siswa. Penelitian ini merupakan penelitian kuantitatif dengan pendekatan eksperimen semu (quasi experiment) menggunakan desain One Group Pretest-Posttest Design. Dalam desain ini, satu kelompok siswa diberikan tes sebelum perlakuan (pretest), kemudian diberikan pembelajaran menggunakan model Problem Based Learning (PBL), dan setelah itu diberikan tes kembali (posttest) untuk melihat pengaruh perlakuan terhadap kemampuan berpikir kritis matematis mereka. sampel penelitian ini adalah peserta didik dari kelas VIII-1 di SMPN 3 Mandrehe Barat yang berjumlah 19 siswa pada materi statistika. Data hasil tes kemudian dianalisis dengan dilakukan uji normalitas data menggunakan uji Shapiro-Wilk. Jika data berdistribusi normal, maka digunakan uji t-pasangan (paired sample t-test) untuk mengetahui apakah terdapat perbedaan yang signifikan antara hasil pretest dan posttes. Berdasarkan analisis data yang dilakukan dalam penelitian ini, Hasil analisis menunjukkan bahwa kelas yang mengikuti pembelajaran TGT mengalami peningkatan signifikan dalam kemampuan penalaran matematis dari 14,06% menjadi 66,22%, dan komunikasi matematis dari 20,73% menjadi 61,26%. Terdapat pula hubungan yang erat antara kedua kemampuan tersebut.
The Impact of Polyya's Problem-Solving Technique on Mathematical Problem-Solving Ability Elvi Syahara Lubis; Dedy Juliandri Panjaitan
Edumaspul: Jurnal Pendidikan Vol 9 No 2 (2025): Edumaspul: Jurnal Pendidikan
Publisher : Universitas Muhammadiyah Enrekang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33487/edumaspul.v9i2.8956

Abstract

This development research generally aims to develop valid, practical and effective problem-based learning devices, specifically the objectives are to: 1) Produce valid, practical and effective problem-based learning device development products in improving students' mathematical problem-solving abilities and independence. 2) Analyze the improvement of students' mathematical problem-solving abilities in the application of problem-based learning devices. 3) Analyze the level of student learning independence in the application of learning devices. The researcher gave pretest questions to students to see the students' initial abilities before being given the developed learning devices. Data obtained from the pretest and posttest results were analyzed to determine how much increase in students' independent learning abilities occurred. The assessment instrument trial was conducted at the beginning (pretest) and at the end (posttest) of the meeting. This learning device was developed using a development model referring to Plomp's theory, which consists of five phases, namely the initial investigation research phase, design phase, design, assessment phase and implementation phase (trial). LKPD is another device developed with a problem-based learning model for the problem-solving abilities and independent learning abilities of participants. This can be said to be effective, valid and practical.
DEVELOPMENT OF MATHEMATICS LEARNING USING BATAK CULTURE- BASED MEDIA IN INDONESIA Panjaitan, Dedy Juliandri; Firmansyah, Firmansyah; Sapta, Andy; Aprilia, Rima; Siregar, Annisa Fadhillah Putri
Jurnal Ilmiah Ilmu Terapan Universitas Jambi Vol. 9 No. 3 (2025): Volume 9, Nomor 3, September 2025
Publisher : LPPM Universitas Jambi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22437/jiituj.v9i3.43196

Abstract

This study aims to develop Batak culture-based domino card learning media to enhance students’ interest and academic achievement in three challenging mathematics topics: trigonometry, integer operations, and logarithms. The research explores how local cultural values, specifically the Batak kinship philosophy Dalihan Na Tolu, can be meaningfully integrated into mathematics instruction. Employing a design-based research (DBR) approach, the study was conducted in seven schools across North Sumatra Province, Indonesia. The development process encompassed media design, expert validation, classroom implementation, and iterative refinement. Instruments utilized included teacher interviews, classroom observations, student questionnaires, and achievement tests. The findings indicate that integrating Dalihan Na Tolu values into game- based learning media provides culturally resonant analogies that enhance students’ understanding of abstract mathematical concepts. In trigonometry, visual and cultural representations helped students distinguish among triangle elements and apply ratio concepts in problem-solving. In the context of integer operations, the domino gameplay facilitated students’ comprehension of signed numbers through contextual scenarios such as altitude and temperature changes. For logarithms, visual simulations and matching exercises supported students in grasping the inverse relationship between exponents and logarithmic expressions. The application of culturally contextualized game-based media not only improved students’ comprehension across all three mathematical topics but also significantly increased their engagement and interest in learning. These findings suggest that incorporating local cultural values into instructional tools can offer an innovative and effective model for advancing mathematics education, particularly in culturally diverse contexts.
Optimasi Waktu dan Biaya Pembangunan Box Underpass Proyek Jalan Tol Ruas Sigli-Banda Aceh dengan Menggunakan Metode PERT dan EVM Fahri, Muhammad Iqbal; Rakhmawati , Fibri; Panjaitan , Dedy Juliandri
MAJAMATH: Jurnal Matematika dan Pendidikan Matematika Vol. 7 No. 1 (2024): Vol 7 No 1 Maret 2024
Publisher : Prodi Pendidikan matematika Universitas Islam Majapahit (UNIM), Mojokerto, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36815/majamath.v7i1.3166

Abstract

Peningkatan efisiensi dalam proyek konstruksi infrastruktur jalan tol adalah suatu keharusan dalam upaya meminimalkan biaya dan mempercepat waktu penyelesaian. Tujuan dari penelitian ini untuk mengoptimalkan waktu dan biaya pembangunan Box Underpass dalam proyek jalan tol ruas Sigli-Banda Aceh dengan menggunakan Metode PERT (Program Evaluation and Review Technique) dan EVM (Earned Value Management). PeneIitian ini menggunakan jenis peneIitian terapan, jenis data yang digunakan adaIah data sekunder yang diambil dan dikumpulkan secara langsung dari tempat penelitian. Hasil peneIitian ini menunjukkan bahwa integrasi Metode PERT dan EVM dapat menghasilkan perencanaan yang lebih baik dan pengendalian yang lebih efektif terhadap waktu dan biaya proyek. Dengan pemantauan yang cermat dan analisis terus-menerus, proyek ini dapat diselesaikan lebih cepat dan dengan biaya yang Iebih efisien, sehingga memberikan manfaat signifikan bagi pemangku kepentingan proyek dan masyarakat yang akan menggunakan jalan tol ini. Proyek ini memiliki probabilitas sebesar 98,46% dengan estimasi waktu penyelesaian adalah 70 hari. Adapun perkiraan total biaya akhir proyek jika tren berkelanjutan adalah Rp 2.844.277.455.
SEIR Model for Stunting Risk Dynamics in Children Based on Nutritional Data in North Sumatra Aprilia, Rima; Panjaitan, Dedy Juliandri
Indonesian Journal of Education and Mathematical Science Vol 7, No 1 (2026)
Publisher : Universitas Muhammadiyah Sumatera Utara (UMSU)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30596/ijems.v7i1.29193

Abstract

Stunting remains a major chronic nutritional challenge in Indonesia, particularly in North Sumatra Province, where prevalence reaches 21.1% among children aged 2-4 years. This study develops a modified SEIR (Susceptible-Exposed-Infected-Recovered) mathematical model to analyse stunting risk dynamics based on nutritional intake patterns, using secondary data from the BPS, SSGI 2023, and the North Sumatra Health Profile 2023. Model compartments represent susceptible children (S), low-birth-weight infants indicating exposure risk (E), severely malnourished children (I), and recovered children after nutritional intervention (R). Parameter estimation employed least-squares fitting, with numerical simulations conducted over 12 months using a fourth-order Runge-Kutta method implemented in Python. Results reveal declining susceptible population trends alongside increases in the exposed (E: 1,362→1,525) and infected (I: 449→723) compartments, despite rising recovery rates (R: 414→2,900), indicating that current nutritional interventions are insufficient to suppress new stunting risk cases. The basic reproduction number proxy (R₀≈1.20) suggests self-sustaining risk propagation. The model demonstrates good fit to empirical SSGI data (MSE=0.012) and provides a quantitative basis for evidence-based nutritional policy formulation in North Sumatra, particularly targeting high-risk districts (Nias, Mandailing Natal, Langkat) identified through spatial analysis.
Co-Authors Abdul Mujib Adinda Kinanti Alistraja Dison Silalahi Anjeli, Sarifah Anjelia Tarigan Annisa Fadhillah Putri Siregar Aprilia, Rima Atika Erlina Nasution Azmi Arief Sinaga Batu, Siti Sadar Sulastri Lumban Br Tarigan, Dinda Renita Carissa Ghaniya Azzahra Carissa Ghaniya Azzahra Dahlia Dahlia Dahlia Dahlia Darmiati Darmiati Della Arsita sari Desi Syahfitri Dewi Fitria Dewi Nur Hasanah Eko Akbar Sukmana Ellysa Syahfitri Elsadday Br Manalu Elvi Syahara Lubis Evi Julyana Nasution Fahri, Muhammad Iqbal Firmansyah Firmansyah Firmansyah Firmansyah Firmansyah Firmansyah Francisca, Onatri Gishela Agra Moukia Gultom, Anastasya L. Hari Munandar Haryati Ahda Nasution Hasanah Hasanah Hasibuan, Nurleli Heba A. Fayed Hema Pebria Rollingka Hidayat Hidayat Hilza Karyawati Indriani Indah Widya Hanzani Ismail Husein, Ismail Kartolo, Rahmad Kristina Intan Parulian Panjaitan Kusyani, Diah Lailan Syafira Putri Lubis Liza, Tasya Dwi Madyunus Salayan Madyunus Salayan, Madyunus Mahyuni Br Damanik Marisa, - Mega Putri yani Muhammad Iqbal Fahri Muhammad Ridwan Muhammad Ridwan Muhammad Sopingi Naibaho, Mesni Harianty Nasution, Amanda Syahri Neni Triana, Neni Nisa Khairani Nove Susanti Waruwu Nurdalilah Nurdalilah Nurdiono Nurdiono Nurhafni Siregar Nuriman Astuti Batubara Nurlela Nurlela Nurmairina Pesta Rut Cahaya Sitanggang Putri, Annisa Fadhillah Rahma Miyati Rakhmawati , Fibri Rakhmawati, Fibri Ramadhani Ramadhani Rangkuti, Sakdiah Aini Rennika Irfenti Seprina Simorangkir Resti Yolanda Rima Aprilia Rima Aprilia Rina Filia Sari Rina Filia Sari Rina Widyasari Rina Widyasari Riri Syafitri Lubis Risnawati, Erna Rita Destini Rizki Rahmadani Rizki Rahmadani Siregar Sagala, Pehulysa Saiful Bahri Saiful Bahri Sajaratud Dur Sapta, Andy Saragih, Agung Evansiyus Saragih, Jenri Hamonangan Sari, Dwi Novita Sekar Ayu Irawan Simbolon, Nurarfah H Sipahutar, Tuti Sumyati Siregar, Aisyah Siregar, Annisa Fadhillah Putri Siti Aisyah Sri Ulfa Rahayu Sudirman Sudirman Sukmana, Eko Akbar Syahara Lubis, Elvi Syahfitri, Lely Tarigan, Anjelia Taripar R Sihaloho Uliya Khoirun Nisa Waruwu, Nove Susanti Wilia Husna Yessy Novalia Yovita Ningtias Yuki Indayanti Yuniar, Nana Yusnita, Nora Zahari, Cut Latifah Zebua, Mesra Belinda