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Analisis Peningkatan Hambatan Kapal Planing Karena Kekasaran Biofouling Juan Lucky Napitupulu; Wilma Amiruddin; Muhammad Luqman Hakim
Jurnal Teknik Perkapalan Vol 14, No 2 (2026): April
Publisher : Diponegoro University

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Abstract

Kapal planing banyak digunakan untuk berbagai keperluan, namun kinerjanya sangat rentan terhadap biofouling. Biofouling dapat mempengaruhi kenaikan hambatan kapal. Peningkatan hambatan ini berdampak langsung pada kenaikan konsumsi bahan bakar dan biaya operasional. Penelitian ini bertujuan untuk menganalisis peningkatan hambatan karena kekasaran biofouling serta perubahan trim dan heave pada kapal planing. Metode yang digunakan adalah melalui simulasi Computational Fluid Dynamics (CFD) pada kondisi calm water . Objek penelitian yang digunakan adalah model kapal planing C dari Taunton et al yang sudah di skalakan dari ukuruan aslinya . Hasil menunjukkan bahwa kekasaran 30-300 μm justru mengurangi hambatan hingga 56.4% akibat efek tripping boundary layer, sedangkan kekasaran ≥1000 μm mengakibatkan peningkatan hambatan total hingga 67.9% dengan peningkatan koefisien gesek mencapai 908%. Penelitian ini juga mengeksplorasi fenomena dinamis yang terjadi, seperti variasi distribusi tekanan, elevasi gelombang, serta trim dan heave.
KONSEP ISLAMISASI SAINS muhammad luqman hakim
Qouman : Jurnal Pendidikan dan Studi Islam Vol. 5 No. 1 (2026): QOUMAN:Jurnal Pendidikan dan Studi Islam
Publisher : STAI Al-Hidayat Lasem

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Abstract

The Islamization of science is a long-standing process that has taken place since the early emergence of Islam, with the aim of harmonizing scientific knowledge with Islamic values. This process reached its peak during the Abbasid Dynasty through the translation and adaptation of foreign sciences into the Islamic framework. The term Islamization itself became popular in the 20th century through the thoughts of figures such as Muhammad Iqbal, Syed Hossein Nasr, Syed M. Naquib al-Attas, and Ismail Raji al-Faruqi. The Islamization of knowledge is defined as an effort to reconstruct science in accordance with the principle of tawhid (the oneness of God), and to liberate it from the influence of secularism and cultures that contradict Islamic teachings. Its primary objective is to develop knowledge that is not only methodologically scientific, but also aligned with divine revelation and spiritual values. The conceptual approaches include instrumentalism, justification, sacralization, integration, and the Islamic paradigm. From the Islamic perspective, science is not merely a tool for understanding nature, but also part of worship and a moral responsibility of humans in fulfilling their role as stewards (khalifah) on Earth. Therefore, Islam never recognizes a dualism between religious and secular sciences, but rather views both as an integral unity.
PINJAMAN ONLINE DALAM PERSPEKTIF HUKUM ISLAM muhammad luqman hakim
JINGJI : Jurnal Ekonomi, Bisnis dan Manajemen Vol. 6 No. 1 (2026): JINGJI: Jurnal Ekonomi, Bisnis dan Manajemen
Publisher : STAI AL-HIDAYAT Lasem

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Abstract

Sarana modern yang memberikan kemudahan untuk melakukan transaksi pinjaman online pada praktiknya menyisakan banyak problem di masyarakat. Mulai dari praktik bunga pinjaman yang mencekik, ancaman fisik bagi peminjam yang tidak bisa bayar hutang, acaman penyebaran rahasia pribadi kepada publik melalui sosial sosial media dan lain sebagainya. Tulisan ini membahas realitas dan fakta yang terjadi ditengah masyarakat mengenai dampak negatif dari pinjaman online. Dengan menggunakan pendekatan kualitatif yang menganalisis data data tentang hukum pinjam meminjam serta melakukan wawancara secara random penulis menemukan fakta ternyata pinjaman online yang marak di tengah masyarakat sangat merugikan nasabah baik berupa pengambalian hutang dengan bunga tinggi serta penggunaan jasa pihak ketiga (debt collector) yang menggunakan cara cara yang kasar, tidak beradab yang membuat takut para nasabah gagal bayar. Dengan praktik yang menyimpang dari prinsip-prinsip yang diajarkan syariah, maka disimpulkan bahwa fintech pinjaman online, terutama yang ilegal tidak sesuai dengan ajaran Islam yang berprinsip bahwa pinjam meminjam harus dalam rangka tolong menolong saling ridho dan saling menguntungkan.
TINJAUAN FILOSOFIS TENTANG PESERTA DIDIK DALAM PENDIDIKAN ISLAM muhammad luqman hakim
Qouman : Jurnal Pendidikan dan Studi Islam Vol. 4 No. 2 (2025): QOUMAN:Jurnal Pendidikan dan Studi Islam
Publisher : STAI Al-Hidayat Lasem

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Abstract

Education is conscious guidance and assistance provided by educators to students in accordance with their physical and spiritual development towards maturity. Learners in Islamic education have important aspects that need to be studied and developed in educational studies. This discussion explains the definition of learners in Islamic education, the needs of learners, the characteristics of learners, and the nature and code of ethics of learners in Islamic education. This study discusses a philosophical review of students in Islamic education by examining several pieces of literature. In this study, data was obtained from books and journals related to the philosophical review of students in Islamic education. References related to students in Islamic education refer to relevant books and journals. The results of the study explain the definition that, etymologically, students are pupils who receive teaching, while terminologically, they are pupils or individuals who are undergoing change and development and therefore still need guidance and direction in shaping their personalities and as part of the structural process of education. In other words, students are individuals who are undergoing a phase of development or growth, both physically and mentally as well as intellectually. The characteristics of students include: students are viewed as a unified human system and, in practice, are both the subject and object of education.
ANALISIS HUKUM ISLAM TENTANG ZAKAT PROFESI (ZAKAT PENDAPATAN) DI INDONESIA: ANALISIS HUKUM ISLAM TENTANG ZAKAT PROFESI (ZAKAT PENDAPATAN) DI INDONESIA muhammad luqman hakim
JINGJI : Jurnal Ekonomi, Bisnis dan Manajemen Vol. 4 No. 1 (2025): JINGJI : Jurnal Ekonomi, Bisnis Dan Manajemen
Publisher : STAI AL-HIDAYAT Lasem

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Abstract

Professional zakat, also known as income zakat, is an evolution of zakat jurisprudence that emerged as a reaction to contemporary economic dynamics. From the perspective of Islamic jurisprudence, professional zakat is classified as part of zakat mal, which is mandated on income generated from professional endeavors, including salaries, honoraria, or performance-based compensation. According to scientific research conducted by Damayanti (2020), Nikmah and Fahrullah (2024), and Balkis and Aji (2024), professional zakat has a qiyas foundation similar to zakat applicable to agriculture and trade, as both categories derive their legitimacy from human labor and effort. Contemporary scholars, including Yusuf al-Qaradawi and Wahbah al-Zuhaili, argue that the obligation to pay professional zakat is triggered when income reaches a threshold equivalent to 85 grams of gold and meets the criteria of one transportation. The regulatory framework in Indonesia, as outlined in Law No. 23 of 2011 on Zakat Management, reinforces this perspective by establishing a legal framework for the collection and distribution of professional zakat through officially recognized zakat institutions. As a result, the concept of zakat related to professions exemplifies the adaptability of Islamic law in addressing the complexities of modern economic progress while firmly upholding the basic principles of justice and social welfare.