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Evaluasi Sistematis Efisiensi Turbin Angin Lepas Pantai Terapung dan Potensi Reduksi Emisi Karbon Salsabila, Salma; Prasetyo, Sigit; Wicaksana, Putra Adil; Sa’Diah, Siti Dhurrotus; Dzaky Abdad, Muhammad Rafif; Trisnoaji, Yuki
IRA Jurnal Teknik Mesin dan Aplikasinya (IRAJTMA) Vol 4 No 3 (2025): Desember
Publisher : CV. IRA PUBLISHING

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56862/irajtma.v4i3.357

Abstract

The growing demand for clean energy has accelerated interest in Floating Offshore Wind Turbines (FOWTs), which enable efficient wind energy harvesting in deep-water regions. This study conducts a systematic literature review across four major databases, Scopus, ScienceDirect, SpringerLink, and Google Scholar, to evaluate the energy efficiency, carbon emission reduction potential, and economic feasibility of FOWT systems. The findings indicate that combined configurations, such as Spar–TLP and multi-turbine platforms, provide the highest energy conversion performance and structural stability, contributing to up to 17% in carbon emission reduction. Economically, several studies report competitive Levelized Cost of Energy (LCOE) and relatively short payback periods. This research strengthens the understanding of FOWT performance by integrating global evidence into the context of marine energy sustainability. However, methodological limitations arise from data variability across studies and the dominance of simulation-based analyses. Further research is required to optimize mooring systems and adapt FOWT designs to tropical and archipelagic environments, such as those found in Indonesia.
Discriminatory Practices Against Sellers by the Shopee Marketplace from the Perspective of Law Number 5 of 1999 and the Principle of Al-‘Ad?lah According to Sayyid Qutb Salsabila, Salma; Rokan, Mustapa Khamal
LEGAL BRIEF Vol. 14 No. 6 (2026): February: Law Science and Field
Publisher : IHSA Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35335/legal.v14i6.1584

Abstract

This study examines the practice of seller discrimination by the Shopee marketplace, which emerges through algorithmic policies, paid promotional services, and platform features that tend to favor certain sellers. This issue is analyzed based on Law No.?5 of 1999 concerning the Prohibition of Monopolistic Practices and Unfair Business Competition, as well as the principle of justice in Islamic economics, which emphasizes distributive fairness and balance in commercial transactions (muamalah). This research employs a normative juridical with a constitutional and philosophical approach to identify the impact of such approach discrimination on small and medium-sized enterprises (SMEs) that operate as sellers on the Shopee platform. The findings show that the existence of paid promotions, store rankings, and Shopee’s algorithmic recommendations potentially leads to unfair business competition, as these systems prioritize sellers who can afford to pay more for greater visibility. This directly weakens the position of smaller sellers, limits their market access, and creates disparities that contradict the principles of justice in Islamic economics, which call for equal opportunities and fair treatment for all business actors.Therefore, stricter oversight from competition authorities and regulatory evaluation are needed to ensure fair, healthy competition that aligns with both legal norms and Islamic economic values. This research is expected to contribute to strengthening digital business competition policies based on the values of Sharia justice
Co-Authors Abda Abda Abdillah, Muhammad Ilham Aditama, Tyaga Adni, Shofy Alifiyah, Netika Alvisina, Ilmiatuz Zahra Amelia, Adinda AMELIA, ELSA Amelia, Sera Anindya, Puan Anisa, Sarah Apriade Voutama Ardandi, Alif Aryani, Dea Resti Asmayani Salimi Athaya, Salsabila Aziz, Calista Sasikirana Finola Azwati, Neneng Sifa Bagaskara, Ragil Damar Baiquni, Fahmi Bambang Herlambang Irawan Nurraid Bila, Nadya Salsa Cahyani, Davina Clarissa, Clarissa Dedeh Dedeh, Dedeh Della Anggraini, Della Dewi, Marshanda Zanetti Kusuma Dhiya Urrahman Djamaluddin, Muhammad Ilham Durunnafis, Alyya Oktavia Dwi Ario Fajar Dyahruri Sanjayasari Dzaky Abdad, Muhammad Rafif Endang Tri Sulistyowati, Endang Tri Ernawiati, Eti Ero, Sisilia Theresia Yuliani Fani, Andifa Dwi Fatika, Zanna Rahma Febrianti, Neng Reza Finola Aziz, Calista Sasikirana Firena, Venna Firmansyah, Danu Firmansyah, Muhammad Nabil Fitria, Rezki Gaharani, Prodio Efa Ginting, Ranta Maulana Hanna Sundari Hasanah, Cindy Meliana Hery Kresnadi Hutabarat, Philipus Ibrahim, Muhammad Kholid Intan Karlina Istiqomah, Salma Nur Kartadikaria, Elisya Kartika Justia Dwiningrum Kartika, Engga Khaerani, Fitri Azlia Khoirinisa, Fitri Kurniati, Lili Kurniawan, Samuel Kusuma Dewi, Marshanda Zanetti Laila, Malikstul Lutfiyani, Mulki Mahendra, Dzulfiqar Faisa Malik, Aulia Ananda Mardisanutomo, Harsoning Tyas Margaretha, Argya MARSA MAYA ARJUNA Maulana, Haisyam Meidinda Ardiani Putri Muchtaridi Muchtaridi Muhammad Ridwan Ridwan, Muhammad Ridwan Muhammad, Belva Hawari Mustapa  Khamal  Rokan Nazarani, Aisyah Aliya Ningrum, Devi Mei Noraeni, Enjelita Nouval, Moh. Javier Arifian Nuraeni, Alfi Paramita, Ursula Natasya Pradnya Pitaloka, Dian Ayu Eka Pranata, Rio Puji Astuti Pupung Faisal Putra, Alvin Ananta Putra, Rizka Andhika Putri, Inge Wiliandani Setya Putri, Noviana Pratama Putri, Valentina Yasmin Nursyah Rahardjo, Vandamme Muhammad Rahayu, Siti Mira Rahmawati, Febiana Rahmawati, Melinda Ramadhan, Muhamad Farhan Risma Apdeni Riszki Hidayat, Bagus Prasetyo Rusdin, Agus Sabarno, Nur Amalia Mardyani Salma Salsabila Salsabilla, Anissa Saputri, Meirisa Ayu Sari, Wilda Aprilia Mustika Savira Putri Rhaudah Sa’Diah, Siti Dhurrotus Setyowati, Lulu Alya Shaqil, Sulthan Arifin Sigit Prasetyo Singadimedja, Holyness N. Sirait, Jorsch Pieter Benhard Soewahju, Renata Bella Aprilana Solihati, Garin Pratiwi Subadriyah, Subadriyah Sukomo, Sukomo Supriadi, Rinaldi Suryanto, Rajwa Dwifauza Suwirta, Utti Suyanti, Natasya Sri Syabani, Fahmi Rahman tania, tania Toto Sugito Trie Damayanti Trisnoaji, Yuki Utama, Insan Aji Vauzcika, Aura Nur Wardoyo, Arik Aguk Wicaksana, Putra Adil Wiranti, Dinda Devina Putri Wulandari, Nurhaliza Tri Yukana Dewi, Anya Maya Yulianty Yulianty Zain, Dzaki