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All Journal Jurnal Komunikasi Ikatan Sarjana Komunikasi Indonesia Reforma: Jurnal Pendidikan dan Pembelajaran Jurnal Investasi Islam LINEAR: Journal of Mathematics Education Mathematics Research and Education Journal MATH-EDU: Jurnal Ilmu Pendidikan Matematika
Hakim, Abdur Rahman
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Economics, Econometrics & Finance Education Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Mathematics Other

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Pengaruh Profitabilitas dan Leverage Terhadap Nilai Perusahaan Indeks Saham Syariah IDXGrowth Dimoderasi Pengungkapan Corporate Social Responsibility Arsyad, Muh Rifai; Hakim, Abdur Rahman; Giantama, Haprila Putri; Alim, Muhammad Taqdirul
Jurnal Investasi Islam Vol. 10 No. 1 (2025): Jurnal Investasi Islam
Publisher : FEBI IAIN Langsa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32505/jii.v10i1.12477

Abstract

Dengan CSR sebagai moderator, penelitian ini bertujuan untuk menganalisis profitabilitas, leverage, dan nilai perusahaan Perusahaan Indeks Saham Syariah IDXGrowth. Penelitian ini mengandalkan data sekunder yang bersumber dari www.idx.co.id, yaitu Laporan Tahunan 2022–2024, dan menggunakan teknik purposive sampling untuk memilih responden. Preliminary Least Square (PLS) dan statistik deskriptif digunakan untuk menganalisis data. Berdasarkan temuan ini, nilai perusahaan dipengaruhi secara positif oleh profitabilitas, leverage, dan ukuran perusahaan. Nilai perusahaan dipengaruhi secara positif dan signifikan oleh profitabilitas, menurut uji hipotesis. Akibatnya, peningkatan nilai perusahaan akan mengikuti peningkatan profitabilitas. Hubungan positif dan signifikan secara statistik antara leverage dan nilai perusahaan ditemukan dalam uji hipotesis. Oleh karena itu, leverage yang lebih besar dikaitkan dengan peningkatan nilai bisnis. Pada saat yang sama, CSR memperkuat dampak laba terhadap nilai perusahaan. Tanggung jawab sosial perusahaan memiliki pengaruh positif dan signifikan secara statistik terhadap nilai perusahaan, yang menunjukkan bahwa tingkat profitabilitas yang lebih tinggi dikaitkan dengan tingkat nilai perusahaan yang lebih tinggi. Hipotesis keempat diterima berdasarkan hasil uji hipotesis. Tanggung jawab sosial perusahaan memperkuat dampak leverage terhadap nilai bisnis, menurut uji hipotesis. Korelasi positif dan signifikan secara statistik antara CSR, leverage, dan nilai perusahaan menunjukkan bahwa dampak CSR terhadap leverage memiliki korelasi langsung dengan dampak CSR terhadap nilai bisnis
Quality Analysis of Evaluation Instruments for Junior High School Students’ Mathematical Conceptual Understanding Hakim, Abdur Rahman; Revita, Rena
MATH-EDU: Jurnal Ilmu Pendidikan Matematika Vol. 10 No. 2 (2025): MATH-EDU: Jurnal Ilmu Pendidikan Matematika
Publisher : Program Studi Pendidikan Matematika, Fakultas Ilmu Pendidikan, Universitas Timor

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32938/jipm.v10i2.7423

Abstract

This study investigates the quality of evaluation instruments developed to measure junior high school students’ mathematical conceptual understanding, with a focus on the topic of numbers. The research employed a quantitative descriptive method involving thirty-two seventh-grade students from a junior high school in Pekanbaru. Data were obtained through essay-based assessments consisting of three items aligned with specific indicators of mathematical conceptual understanding and cognitive domain levels. The analysis examined validity, reliability, difficulty level, and discrimination power. The findings show that all three items achieved high validity, although the overall reliability coefficient was categorized as low. The difficulty level varied, with one item classified as easy and two as moderate. Discrimination power also differed among items, with one item having poor discrimination, one adequate, and one good. These results highlight the importance of conducting systematic quality testing to ensure that evaluation instruments are valid, reliable, and appropriately calibrated for assessing students’ conceptual understanding in mathematics.
Integrating islamic values into mathematics student worksheets: Validity study on exponents and radicals Hakim, Abdur Rahman; Ramadhanti, Oktarisa; Bijani, Hilda Ladan; Azmi, Memen Permata; Nufus, Hayatun
LINEAR: Journal of Mathematics Education Vol. 6 No. 2 (2025): Volume 6 Nomor 2 Desember 2025
Publisher : Fakultas Tarbiyah dan Ilmu Keguran IAIN Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32332/w00bfe09

Abstract

Student worksheets are instructional materials designed to help learners grasp subject matter, foster interaction with teachers, and encourage active engagement in the learning process. In Islamic-based schools, the integration of religious values into instructional resources is essential to provide meaningful learning experiences that support both cognitive and moral development. However, existing mathematics worksheets often lack such integration. This study aims to design and validate mathematics worksheets on exponents and radicals that explicitly integrate Islamic values. The research employed a Research and Development (R&D) design using Plomp’s development model, which consists of preliminary research, prototyping, and evaluation. The study, however, was limited to the prototyping and validation stages. Validation was conducted by three expert validators. The results revealed that the worksheets achieved an overall overall validity score of 90,50% from subject matter experts and 95,62% from instructional design experts, both categorized as very valid. These findings demonstrate that the integration of Islamic values into mathematics worksheets not only meets academic and design standards but also provides a meaningful approach to teaching mathematics that aligns with the spiritual and moral objectives of Islamic-based education.
The A Meta-Analysis of Project-Based Learning’s Effect on Mathematical Communication Skills Across Educational Levels and Group Sizes Hakim, Abdur Rahman; Hasanuddin; Firza Mufti Aulia; Lee, Jung Won
Reforma: Jurnal Pendidikan dan Pembelajaran Vol. 15 No. 2 (2025): Reforma: Jurnal Pendidikan dan Pembelajaran
Publisher : Universitas Islam Lamongan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30736/reforma.v15i2.1250

Abstract

Mathematical Communication Skills (MCS) play a vital role in helping students structure their thinking and express mathematical ideas clearly and logically. Unfortunately, this skill remains relatively low due to limited interaction during instruction and the dominance of teacher-centered learning models. One innovative approach believed to address this issue is Project-Based Learning (PjBL), which positions students as active agents in the learning process. Numerous studies have indicated that PjBL can enhance MCS; however, it remains unclear which educational level and group size are most optimal for its implementation. This study aims to analyze the overall effect of PjBL on students’ MCS, as well as its impact across educational levels and sample sizes. A meta-analysis was conducted on eight published articles selected using PRISMA guidelines and analyzed using the Comprehensive Meta-Analysis (CMA) software. Effect sizes were calculated using Hedge’s g to measure the magnitude of the difference between the experimental and control groups. The results revealed that PjBL had a significant and moderately (0,785) effective impact on MCS, with students taught through PjBL demonstrating an average of 78.38% higher MCS compared to those in conventional learning environments. The highest effectiveness was found at the junior high school level, which aligns with Piaget’s view that students at this stage are in the concrete operational stage and are more responsive to activity-based and collaborative learning. Furthermore, PjBL was more effective when applied in smaller group sizes, as it allowed for more intensive interaction and support. However, the limited number and diversity of studies analyzed indicate a need for further research with broader coverage and more in-depth moderator analysis to obtain a more comprehensive understanding.
The Discourse Network Analysis of Rempang Eco City Policy in the Digital News Media Hakim, Abdur Rahman; Herna; Yudha, Reza Praditya
Jurnal Komunikasi Ikatan Sarjana Komunikasi Indonesia Vol. 10 No. 2 (2025): December 2025 - Jurnal Komunikasi Ikatan Sarjana Komunikasi Indonesia
Publisher : Ikatan Sarjana Komunikasi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25008/jkiski.v10i2.1372

Abstract

This study examines how Indonesia’s mainstream digital media—Kompas, DetikNews, and CNN Indonesia—constructed policy discourse on the Rempang Eco City development between January 2023 and May 2025. Employing Discourse Network Analysis (DNA), the research maps relational patterns among actors, concepts, and positions extracted from news articles, providing a dual analytical lens: structural and interpretive. The findings reveal two dominant discourse coalitions: one promoting economic development and investment legitimacy, and the other emphasizing human rights, environmental risks, and Indigenous resistance. These coalitions reflect discursive polarization within public debates on national strategic projects. Conceptually, the study contributes to Communication Policy Theory by situating media discourse as a site of symbolic governance, where policy legitimacy is negotiated through competing narratives. Methodologically, it demonstrates the utility of DNA in capturing actor alignments, discursive clusters, and coalition dynamics in fragmented media environments. The study underscores the critical role of digital news platforms not only as information intermediaries but as active agents shaping public perception and policy coherence. This research highlights the need for more communication-centered approaches in analyzing policy controversies and offers a replicable framework for mapping discursive power in development conflicts.
The Supply and Demand Analysis of a Spicy Smashed Fried Chicken Business Using Linear Functions in Mathematics Learning Wati, Erma; Hakim, Abdur Rahman; Rosadi, Farah Fadhilah; Jasca, Jihan Marlinita; Kafrina; Granita
Mathematics Research and Education Journal Vol. 10 No. 1 (2026): April
Publisher : UIR PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25299/mrej.2026.vol10(1).27561

Abstract

This study aims to analyze the relationship between demand and supply in a Spicy Smashed Fried Chicken business around UIN Suska Riau and its application in mathematics learning. The research used a descriptive quantitative approach with a case-study design. Primary data were collected in December 2024 on Jl. Buluh Cina, Pekanbaru, through purposive sampling involving one business owner and six observations of daily transactions at different price levels. Data were analyzed using simple linear regression under the assumption of ceteris paribus. The results indicate that an increase of Rp1,000 in price decreases demand by approximately 5 portions per day and increases supply by approximately 5 portions per day. The market equilibrium occurs at a price of Rp12,500 with an equilibrium quantity of around 37–38 portions per day. These findings provide insights for culinary MSMEs in determining pricing strategies based on market conditions, especially among students who are sensitive to price changes. In addition, the resulting linear models can be applied in Realistic Mathematics Education (RME) to help students understand mathematical modeling through real-world contexts
Co-Authors Alim, Muhammad Taqdirul Arsyad, Muh Rifai Bijani, Hilda Ladan Firza Mufti Aulia Giantama, Haprila Putri Granita Hayatun Nufus Herna Jasca, Jihan Marlinita Kafrina Lee, Jung Won Memen Permata Azmi Noka, Isara Abda Ramadhanti, Oktarisa Rena Revita Rosadi, Farah Fadhilah Wati, Erma Yudha, Reza Praditya