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All Journal FIKRI : Jurnal Kajian Agama, Sosial dan Budaya Risâlah, Jurnal Pendidikan dan Studi Islam Jurnal Penelitian Pendidikan IPA (JPPIPA) Jurnal Masharif al-Syariah: Jurnal Ekonomi dan Perbankan Syariah Buana Ilmu Mosharafa: Jurnal Pendidikan Matematika Jurnal Teknik Mesin Mechanical Xplore Chalim Journal of Teaching and Learning AME (Aplikasi Mekanika dan Energi) : Jurnal Ilmiah Teknik Mesin Jurnal Pengabdian Masyarakat Indonesia (JPMI) Annaba: Jurnal Ilmu Jurnalistik IZZI: Jurnal Ekonomi Islam
Khoirudin
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Religion Agriculture, Biological Sciences & Forestry Humanities Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Control & Systems Engineering Economics, Econometrics & Finance Education Energy Engineering Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mathematics Mechanical Engineering Physics Social Sciences Other

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Sistem Perbankan Syariah dan Landasan Filosofinya Khoirudin; Mawardi
Jurnal Masharif al-Syariah: Jurnal Ekonomi dan Perbankan Syariah Vol 10 No 1 (2025)
Publisher : Universitas Muhammadiyah Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30651/jms.v10i1.24837

Abstract

Dalam Islam sistem perbankan syariah merupakan bentuk sistem keuangan yang berlandaskan pada prinsip-prinsip syariah Islam, yang melarang praktik riba, gharar (ketidakpastian), dan maysir (spekulasi). Filosofi utama perbankan syariah adalah menciptakan keadilan, transparansi, dan keseimbangan dalam aktivitas keuangan, dengan tujuan mendukung pertumbuhan ekonomi yang berkelanjutan dan berbasis etika. Sistem ini menggunakan akad-akad tertentu, seperti mudharabah (bagi hasil), musyarakah (kerja sama), ijarah (sewa), dan murabahah (jual beli dengan margin keuntungan), untuk memastikan transaksi sesuai dengan nilai-nilai Islam. Selain itu, perbankan syariah tidak hanya berorientasi pada keuntungan finansial, tetapi juga bertujuan untuk memberikan manfaat sosial melalui alokasi dana zakat, infaq, dan sedekah. Penelitian ini membahas kerangka kerja perbankan syariah, prinsip filosofisnya, serta kontribusinya terhadap stabilitas dan inklusivitas ekonomi global. Sistem ini telah menjadi alternatif yang menjanjikan dalam menghadapi tantangan ekonomi modern, dengan menekankan nilai-nilai moral dan keberlanjutan sebagai inti dari operasionalnya.
Pengembangan Perangkat Pembelajaran Problem Based Learning dan Hypothetical Learning Trajectory yang Berorientasi pada Kemampuan Penalaran Matematis Siswa Khoirudin; Rizkianto, Ilham
Mosharafa: Jurnal Pendidikan Matematika Vol. 7 No. 2 (2018): Mei
Publisher : Department of Mathematics Education Program IPI Garut

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31980/mosharafa.v7i2.502

Abstract

Penelitian ini adalah research and development (R&D) yang bertujuan untuk mengembangkan perangkat pembelajaran berupa RPP dan LKS dengan pendekatan problem based learning dan hypothetical learning trajectory yang berorientasi pada kemampuan penalaran matematis siswa. Subjek penelitian ini adalah siswa kelas VII A SMP Negeri 1 galur dengan jumlah siswa sebanyak 22 siswa. Prosedur pengembangan penelitian ini adalah model ADDIE yang terdiri dari Analysis, Design, Development, Implementation, dan Evaluation. RPP dan LKS yang telah dikembangkan divalidasi dan direvisi sehingga layak untuk digunakan. Berdasarkan hasil penilaian kevalidan, RPP memenuhi kriteria sangat valid, sedangkan LKS memenuhi kriteria valid. Berdasarkan hasil penilaian kepraktisan, perangkat pembelajaran memenuhi kriteria sangat praktis dengan perolehan skor angket respon siswa 3,38 pada skala 4 dan angket respon guru 3,73 pada skala 4. Berdasarkan penilaian keefektifan dari tes kemampuan penalaran matematis diperoleh nilai rata-rata kelas yaitu 88 dan siswa yang memperoleh nilai minimal pada kategori “baik” sebesar 91%. Keefektifan perangkat pembelajaran pada kemampuan penalaran matematis didukung oleh one sample t-test dengan taraf signifikansi 0,05. This research is a research and development (R&D) that aims to develop mathematics learning material that includes lesson plans and student worksheets based on a problem-based learning approach and hypothetical learning trajectory with an orientation on students’ mathematical reasoning skills. The subjects of this study were the students of class VII A SMP Negeri 1 Galur with a total of 22 students. The present study used the ADDIE model, consisting of Analysis, Design, Development, Implementation, and Evaluation. The lesson plans and student worksheets were validated and underwent several revisions to obtain appropriate results for use. Based on the result of the validation assessment, the lesson plan is “very valid”, while the validation assessment of student worksheets is “valid”. Based on the result of practicality, the learning material is “very practical” with 3.38 on a scale of 4 of the student questionnaire and 3.73 on a scale of 4 of the teacher questionnaire. Based on the effectiveness assessment using the mathematical reasoning student’s skill test, the average score of the class is 88 and 91% of students have minimum mathematical reasoning skills in the “good” category. The effectiveness of the learning material on mathematical reasoning students’ skills is also proved by one sample t-test with a level of significance 0.05.
Taguchi-Based Optimization of TIG Welding for Joining Low-Carbon Steel (ST37) and Stainless Steel (SUS 304) Khoirudin; Karyadi, Karyadi; Kusnadi, Akhmad; Amir, Amir; Abdulah, Amri; Hananto, Agus; Taufik Ulhakim, Muhamad
Jurnal Teknik Mesin Mechanical Xplore Vol. 5 No. 2 (2024): Jurnal Teknik Mesin Mechanical Xplore (JTMMX)
Publisher : Mechanical Engineering Department Universitas Buana Perjuangan Karawang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36805/jtmmx.v5i2.9043

Abstract

This study investigates the optimization of tungsten inert gas (TIG) welding parameters for joining dissimilar metals, specifically ST37 low-carbon steel and SUS 304 stainless steel, using the Taguchi L9 experimental design. The welding parameters evaluated include welding current (45-65 A), tungsten electrode diameter (1.6-2.4 mm), and shielding gas flow rate (12-18 LPM). The aim is to enhance joint integrity and mechanical properties by systematically analyzing the influence of these parameters on hardness and tensile load (TS loads). Hardness testing revealed that the weld zone exhibited the highest hardness, followed by the heat-affected zone and base metal. Tensile testing showed that the highest TS loads of 341 kgf were achieved at 45 A, 1.6 mm electrode diameter, and 12 LPM gas flow rate. Signal-to-noise ratio analysis and analysis of variance (ANOVA) indicated that welding current had the most significant influence on hardness and TS loads, with contributions of 39% and 41.27%, respectively, followed by electrode diameter (17% and 36.42%). In comparison, the gas flow rate had the least impact (45% and 22.31%). However, ANOVA results showed that none of the factors exhibited statistical significance (P > 0.05). The findings contribute to the field of welding engineering by providing optimized TIG welding parameters for ST37-SUS 304 joints, enhancing their reliability in various industrial applications such as automotive manufacturing, oil and gas, and power generation, where durable and corrosion-resistant welds are crucial.
DIGITALIZATION OF ISLAMIC MICROFINANCE INSTITUTIONS: OPPORTUNITIES, CHALLENGES, AND ECONOMIC IMPLICATIONS FOR THE MUSLIM COMMUNITY Khoirudin; Juliana
IZZI: Jurnal Ekonomi Islam Vol. 5 No. 2 (2025): IZZI: Jurnal Ekonomi Islam
Publisher : Prodi Manajemen Bisnis Syariah

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

This study explores the digital transformation of Islamic Microfinance Institutions (LKMS) by analyzing the forms of innovation, strategic opportunities, implementation challenges, and socio-economic impacts. Using a qualitative library research method, this paper synthesizes findings from academic literature, official reports, and sharia-compliant fintech developments to evaluate how digitalization aligns with the objectives of maqashid shariah. The results show that LKMS have begun integrating digital solutions such as mobile apps, cloud-based accounting, and blockchain-based systems to enhance service efficiency, accessibility, and transparency. Digital transformation has increased operational capacity and outreach while promoting economic inclusion among marginalized communities. However, the study also highlights several challenges, including infrastructure limitations, digital illiteracy, and sharia compliance concerns. The conclusion emphasizes the need for institutional and regulatory support to optimize the benefits of digital innovation within Islamic ethical finance. Further empirical research is suggested to explore the effectiveness of digital platforms in realizing sustainable economic empowerment aligned with sharia principles.
Monte Carlo Simulation as a Predictive Tool in Addressing Demand Volatility Khoirudin; Sulistyowati, Enik
Jurnal Penelitian Pendidikan IPA Vol 11 No 11 (2025): November: In Progress
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v11i11.13413

Abstract

This research aims to estimate the probability distribution of 330 mL product demand at PT XYZ using Monte Carlo simulation to support risk-based production and inventory decisions. Monthly demand data for one year was used to form an empirical probability distribution, followed by random number generation using the Mixed Congruential Generator method and the execution of 100,000 simulation iterations. The simulation results show that demand has a wide range of uncertainty, with the 90th and 95th percentiles falling within the range of 7,000–7,800 units per month. Extreme demand risks were also identified, with the probability of demand exceeding 7,460 units reaching 22.4%. Based on these results, quantile-based safety stock calculations indicate an additional need of approximately 1,800 units to achieve a 90% service level. Validation using Kolmogorov–Smirnov and Chi-Square tests shows that the simulation distribution is consistent with the historical distribution, thus validating the model. Overall, this research produced an accurate and reliable probabilistic framework to support capacity planning, buffer inventory determination, and demand uncertainty risk mitigation at PT XYZ.
Co-Authors Amar Amir Amir Amir Amri Abdulah Ardi Rajab, Dede Darim, Abu Dodi Mulyadi Enik Sulistyowati Fachrizal Ahmad Setiawan Fathan Mubina Dewadi Gama Permana Hananto, Agustia Ilham Rizkianto Juliana Karyadi Karyadi Karyadi Khodijah Kusnadi, Akhmad Mawardi Meti Fatimah Muhamad Abdika Mafruh Muhammad Husnur Rofiq Murtalim Nur Alam, Deden Nuraeni Puji Wahyuningsih Pusaka, Semerdanta Rena Widia Lestari Reni Tri Lestari Roy Waluyo Saepi Subando, Joko - Sudarjat, Muhammad Fauzaan Fikri Sugiharto Sukarman Sukarman Sukarman Taufik Ulhakim, Muhamad Toto Supriyono, Toto