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All Journal Jurnal Pendidikan Teknik Mesin Geological Engineering E-Journal Fountain of Informatics Journal Sistemasi: Jurnal Sistem Informasi SOSIOHUMANIORA: Jurnal Ilmiah Ilmu Sosial dan Humaniora INTENSIF: Jurnal Ilmiah Penelitian dan Penerapan Teknologi Sistem Informasi BAREKENG: Jurnal Ilmu Matematika dan Terapan JOURNAL OF APPLIED INFORMATICS AND COMPUTING Bisma: Jurnal Bisnis dan Manajemen Jambura Journal of Mathematics INTEK: Jurnal Penelitian Building of Informatics, Technology and Science Jurnal Optimalisasi Scholastica : Jurnal Pendidikan dan Kebudayaan Jurnal Ilmu Pendidikan Islam Community Development Journal: Jurnal Pengabdian Masyarakat Archive: Jurnal Pengabdian Kepada Masyarakat Tadris: Jurnal Pendidikan Islam Software Development Digital Business Intelligence and Computer Engineering Buletin Pengabdian Journal of Global Engineering Research & Science (J-GERS) Ta'amul: Journal of Islamic Economics PANDALUNGAN : Jurnal Pengabdian kepada Masyarakat Cahaya Pengabdian Samarinda International Journal of Islamic Studies Journal of Modern Social and Humanities
Lutfi Hakim
Program Studi Teknik Geologi Universitas Diponegoro, Semarang
Religion Agriculture, Biological Sciences & Forestry Arts Humanities Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Health Professions Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Mathematics Mechanical Engineering Physics Public Health Social Sciences Transportation Other

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PENINGKATAN PEMAHAMAN TENTANG SUDUT DWELL DENGAN MENGGUNAKAN ALAT PERAGA SISTEM PENGAPIAN Hakim, Lutfi; Wijanarko, Dwi; Hadromi, -
Jurnal Pendidikan Teknik Mesin Vol 9, No 2 (2009)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Negeri Semarang

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Abstract

Penelitian ini bertujuan untuk mengetahui peningkatan pemahaman mahasiswa tentangsudut dwell dengan menggunakan media alat peraga sistem pengapian. Populasi dalampenelitian ini adalah mahasiswa pengikut matakuliah Kelistrikan Otomotif JurusanTeknik Mesin Universitas Negeri Semarang yang terdiri dari 30 mahasiswa. Penelitiandilakukan dengan metode Quasi Eksperiment dengan pola pretest-post test one groupdesign dengan memberikan perlakukan tambahan penggunaan alat peraga dalam prosesperkuliahan. Data penelitian diperoleh dengan pretest (sebelum penggunaan alat peraga)dan posttest Karena yang dilakukan penelitian hanya satu kelas maka yang diambiladalah seluruh populasinya. Hasil analisis data menunjukkan bahwa ada peningkatanpemahaman tentang sudut dwell pada sistem pengapian setelah menggunakan alatperaga.Kata kunci: pemahaman, metode pengajaran alat peraga, sistem pengapian
ANALISIS MASERAL DENGAN METODE REFLECTANCE VITRINITE UNTUK MENGETAHUI KUALITAS BATUBARA PADA SUMUR AL 25, LAPANGAN KINTAP, KABUPATEN TANAH LAUT PROVINSI KALIMANTAN SELATAN, PT. ANUGERAH LUMBUNG ENERGI Hakim, Lutfi; Rachwibowo, Prakosa; Widiarso, Dian Agus; Zaqqie, Bagus
Geological Engineering E-Journal Vol 6, No 1 (2014): Volume 6, Nomor 1, Tahun 2014
Publisher : Geological Engineering E-Journal

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Abstract

The spread of coal deposits in Indonesia is quite large, most of coal basin is located in Sumatra and Kalimantan. One of the basin that produce economical coal deposit with value of calories more than 6.000 kal/g in Tanjung Formation is Asam-Asam Basin (Darlan etc, 1999). PT Anugerah Lumbung Energi is one of the coal mining companies with mining working area on Asam-asam basin. Research area  is located  in Kintap field, Tanah Laut Regency, South Kalimantan. The aim of this research is to find out about coal quality using maceral analysis with vitrinite reflectance method on well AL 25 and spread direction of coal seam at the research area.Methods of research are descriptive and analysis. Based on these methods, done the stage of the analysis and interpretation with data supporting are stratigraphical data and laboratory data. Activities performed such as geological mapping, maceral analysis with vitrinite reflectance methods and coal quality interpretation on well AL 25. The software used to support this undergraduate thesis are the Arcgis ,Autocad X 5 and Corel Draw. In Undergraduate Thesis, the author has divided into five phases, such as lithology description, cropline withdrawal based on strike and dip, maceral analysis, coal quality interpretation and results correlation of maceral analysis, rank and coal quality on the well AL 25.Based on the result of analysis data, it can be interpreted that lithology at the research area are sandstones, siltstone, claystone and thin layer of coal. The direction of seam coal ( cropline ) at the research area is southeast - northwest based on strike / dip. The results of the maceral analysis for each seam produce rank between Lignite to High Volatile bituminous B, whereas the results of the quality analysis for each seam produces a caloric value ranging from 12040.35 to 13786.69 Btu/lb or ranged from High Volatile Bituminous C to High Volatile Bituminous B. Based on the result of maceral analysis, rank and coal quality, it can be concluded that there are a mutual relation between maceral, rank and coal quality. The mutual relation is when the high percentage value of vitrinite reflectance so that value of coal calorie is good too.
PENERAPAN LINEAR PROGRAMMING DALAM PENENTUAN KOMBINASI PRODUK GUNA MEMAKSIMALKAN LABA PADA UD PUTERA SROEDJI JEMBER Hakim, Lutfi; Paramu, Hadi; Gusminto, Eka Bambang
BISMA: Jurnal Bisnis dan Manajemen Vol 12 No 3 (2018)
Publisher : Jurusan Manajemen Fakultas Ekonomi dan Bisnis

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/bisma.v12i3.9000

Abstract

Abstract: The purpose of this study is to analyze the constraints and the optimalproduct combinations in the production process to obtain maximum profit at UDPutera Sroedji. UD Putera Sroedji is one of the trading companies selling packagedrice that consisted of the 2.5 kg, 5 kg, and 25 kg packaging. In its productionprocess, the company experienced the problem or constraints regarding the lessoptimal use of resources to reach maximum profit. Linear programming can beused to allocate the limited resources in the production process in order to obtainmaximum profit. This research used forecasting and linear programming methodsto determine the optimal product combination at UD Putera Sroedji. Resultsshowed that UD Putera Sroedji should produce 200 units of 2.5 kg packaged rice,600 units of 5 kg packaged rice, and 148 units of 25 kg packaged rice in order toachieve a maximum profit of Rp 7,960,977 per month.Keywords: packaged rice, maximum profit, linear programming, and simplexmethod.Abstrak: Tujuan penelitian ini adalah untuk menganalisis kendal-kendala(constraints) dan kombinasi produk yang optimal dalam proses produksi untukmemperoleh laba atau keuntungan maksimal pada UD Putera Sroedji. UD PuteraSroedji merupakan salah satu perusahaan dagang yang bergerak dalamperdagangan beras kemasan, dalam kemasan 2,5 kg, 5 kg, dan 25 kg. Dalamproses produksinya, perusahaan menghadapi beberapa masalah atau kendalayang berhubungan dengan penggunaan sumber daya yang belum optimalsehingga laba yang didapatkan belum maksimal. Linear programming dapatdigunakan untuk mengalokasikan sumber daya yang terbatas untuk memperolehlaba maksimal. Metode analisis yang digunakan dalam penelitian ini adalahforecasting dan linear programming untuk menentukan kombinasi produk yangoptimal. Hasil analisis menunjukkan bahwa UD Putera Sroedji harus memproduksi200 unit beras kemasan 2,5 kg; 600 unit beras kemasan 5 kg; dan 148 unit beraskemasan 25 kg untuk mendapatkan laba maksimal sebesar Rp 7.960.977 perbulan.Kata Kunci: beras kemasan, laba maksimal, linear programming, metodesimpleks.
PENINGKATAN PEMAHAMAN TENTANG SUDUT DWELL DENGAN MENGGUNAKAN ALAT PERAGA SISTEM PENGAPIAN Hakim, Lutfi; Wijanarko, Dwi; Hadromi, -
Jurnal Pendidikan Teknik Mesin Vol 9, No 2 (2009)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Negeri Semarang

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

Abstract

Penelitian ini bertujuan untuk mengetahui peningkatan pemahaman mahasiswa tentangsudut dwell dengan menggunakan media alat peraga sistem pengapian. Populasi dalampenelitian ini adalah mahasiswa pengikut matakuliah Kelistrikan Otomotif JurusanTeknik Mesin Universitas Negeri Semarang yang terdiri dari 30 mahasiswa. Penelitiandilakukan dengan metode Quasi Eksperiment dengan pola pretest-post test one groupdesign dengan memberikan perlakukan tambahan penggunaan alat peraga dalam prosesperkuliahan. Data penelitian diperoleh dengan pretest (sebelum penggunaan alat peraga)dan posttest Karena yang dilakukan penelitian hanya satu kelas maka yang diambiladalah seluruh populasinya. Hasil analisis data menunjukkan bahwa ada peningkatanpemahaman tentang sudut dwell pada sistem pengapian setelah menggunakan alatperaga.Kata kunci: pemahaman, metode pengajaran alat peraga, sistem pengapian
Kmeans Clustering Segmentation on Water Microbial Image with Color and Texture Feature Extraction Kristanto, Sepyan Purnama; Hakim, Lutfi; Yusuf, Dianni
Building of Informatics, Technology and Science (BITS) Vol 4 No 3 (2022): December 2022
Publisher : Forum Kerjasama Pendidikan Tinggi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47065/bits.v4i3.2490

Abstract

Image segmentation is one of the analytical processes for digital image recognition, where this process divides the digital image into several unique regions based on homogeneous pixels. The process of homogeneous grouping images is based on several colour, texture and shape features. Colour in digital image processing is very important because colour has many information humans can easily understand. Colour has various features, combining colour intensity and grey (grayscale) and binary (black and white) values. However, the colour feature extraction process has many weaknesses. If the object used has a very small si[1]ze and range area, the use of colour features needs to be combined with extraction, and the segmentation process can be maximized. This study uses colour and texture features in the extraction process. It uses bacterial objects (microbes) from water, with limited image quality and objects that tend to be difficult to identify. The colour space feature extraction process is combined with a Gabor filter so that the segmentation process produces high-quality accuracy. Good. The Gabor filter used in this study is combined with the L*a*b space vector to increase accuracy in the segmentation process. The results showed that the use of texture features resulted in an increase in accuracy of 17.5% by testing the cluster value of 1.2.
Meningkatkan Kualitas Pendidikan dengan Pendekatan yang Kreatif dan Cerdas Hakim, Lutfi
SCHOLASTICA: Jurnal Pendidikan dan Kebudayaan Vol 5 No 1 (2023): Mei
Publisher : LP3M STITNU AL HIKMAH MOJOKERTO

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Abstract

Dalam menghadapi tantangan masa depan yang semakin kompleks, pendekatan kreatif dan cerdas dalam pendidikan Islam menjadi kunci utama untuk mempersiapkan generasi muda menghadapi masa depan yang cerah. Dengan pendekatan ini, siswa akan memiliki pemahaman yang mendalam tentang ajaran agama Islam dan mampu mengaplikasikannya dalam kehidupan sehari-hari. Mereka juga akan memiliki keterampilan yang dibutuhkan untuk menghadapi perubahan dan tantangan yang terus berkembang. Mengimplementasikan pendekatan kreatif dan cerdas dalam pendidikan Islam membutuhkan kerja sama dan kolaborasi dari semua pihak terkait. Para pendidik, kepala sekolah, orang tua, dan masyarakat harus bekerja sama untuk menciptakan lingkungan pendidikan yang inovatif dan mendukung. Dengan demikian, kita dapat menciptakan masa depan yang cerah bagi generasi muda yang berakhlak mulia dan berwawasan luas, serta mampu menghadapi tantangan dan perubahan dengan kecerdasan dan kreativitas yang tinggi.
Soil Improvement Method on Body Foundation Dam (Main Dam) with Grouting Method DAM Construction Project (Rababaka Kompleks, West Nusa Tenggara) Hakim, Lutfi; Sari, Ribut Nawang; Sukatja
Journal of Global Engineering Research and Science Vol. 2 No. 2 (2023): Vol. 2 No. 2 (Desember 2023): Journal of Global Engineering Research & Science
Publisher : Jakarta Global University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56904/j-gers.v2i2.74

Abstract

Cement injection under pressure, also known as grouting, is a process in which a liquid mixture is injected into cavities, cracks, and fractures in rock or soil under controlled pressure. The injected liquid undergoes physical and chemical transformations, eventually solidifying. This study aimed to evaluate the performance of various cement-water mixture designs, determine the required volume of grout based on the Lugeon number (Lv), and assess effective spacing intervals between grouting points by calculating grout effectiveness in percentages. Jet grouting, a proven method in diverse soil conditions, employs specialized equipment to hydraulically mix soil with grout, enabling soil stabilization and modification. The system is particularly effective in erodible soils, such as granular soils, and even in cohesive plastic clays. At the Mila Dam, grouting tests were conducted along the centerline of the main dam, specifically at the left abutment (Bukit Tumpuan Kiri) and the riverbed. Core drilling results from the Pilot Hole (BH-01) at a depth of 30 m revealed stratigraphic characteristics. The left abutment rock along the centerline of the dam predominantly consists of gray lapilli tuff overlaid by breccia-tuff rock units, which are brownish in color.
Implementasi Dan Evaluasi Manajemen Berbasis Sekolah Dalam Meningkatkan Kualitas Sekolah Hakim, Lutfi; Muid, Abdul; Anwar, Farikhul; Khoiriyah, Robihatul; Berti Ibmagara, Afridha
Jurnal Ilmu Pendidikan Islam Vol 22 No 03 (2024): Oktober
Publisher : FAKULTAS TARBIYAH UNIVERSITAS QOMARUDDIN GRESIK - JAWA TIMUR

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36835/jipi.v22i03.4476

Abstract

Education plays an important role in the development of society and the growth of individuals, with School-Based Management (SBM) being a relevant paradigm for improving the quality of education. This research uses a descriptive qualitative method to analyze the implementation and evaluation of SBM in an effort to improve school quality. Data were collected through documentation studies and analyzed inductively to identify important information related to SBM. The results show that SBM gives autonomy to schools to manage their own educational resources and programs, increases active participation from all relevant parties, and encourages continuous evaluation for improvement. The implementation of SBM can also improve transparency, accountability and the development of principals' leadership skills. However, challenges such as poor understanding of the concept and lack of resource support require attention. Evaluation of SBM provides an overview of changes in school quality and is an important tool for continuous improvement, which in turn contributes significantly to improving the quality of education
Implementation of IGG in IKMS Based on Entrepreneurship Programs in East Java Ala'uddin, M.; Hakim, Lutfi; Najib, M.; Alimin, Alimin; Khalim, Abdul
Ta'amul: Journal of Islamic Economics Vol. 1 No. 1 (2022): November
Publisher : Sekolah Tinggi Agama Islam Darul Ulum Banyuanyar Pamekasan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58223/taamul.v1i1.3

Abstract

The main objective of this research is to gain explanative knowledge regarding the application of IGG in IKMS based on entrepreneurship programs in East Java. This multi-case study approach sets five Micro Waqf Banks and five Islamic Financial Institutions Recipient of Cash Waqf (LKS PWU) as research objects. The results of the study concluded that IGG in IKMS based on entrepreneurial programs was carried out through behavioral characteristics that showed the principles of shiddiq, amanah, fathonah and tabligh. The forms of behavior of the shiddiq principle at IGG include: (1) independence in the management and distribution process; (2) information accountability; (3) The characteristics of the behavior of the principle of trust are: (1) the selection of responsible customers; (2) fair and equal implementation of Standard Operational Procedures (SOP); (3) consistency of Group Endorsement Examination (UPK), Group Compulsory Training (PWK), Weekly Halaqoh (HALMI) and the establishment of Community Business Groups around Indonesian Islamic Boarding Schools (KUMPI); In the third principle, the behavioral characteristics of the fathonah principle include: (1) guarantees for providing capital for entrepreneurs; (2) stipulation of policy on ujrah payment as infaq for mauquf 'alaih; (3) stipulation of a policy for depositing a special waqf account; Finally, the tabligh principle is manifested in the following behavioral characteristics: (1) transparency of information and data to all customers; (2) leadership of member managers and customers; (3) implementation of mentoring programs to increase product marketing online; (4) transparency of financial reports, evaluation reports and ZISWAF allocations and (5) competent managers who are nimble in improving customer skills
Prediksi Tinggi Gelombang dan Kecepatan Angin di Pantai Menggunakan Metode BiGRU Putri Oktavia, Nabiilah; Hakim, Lutfi; Novitasari , Dian Candra Rini; Asyhar, Ahmad Hanif; Setiawan, Fajar
Fountain of Informatics Journal Vol. 10 No. 1 (2025): Mei
Publisher : Universitas Darussalam Gontor

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21111/fij.v10i1.13018

Abstract

Abstrak Indonesia terletak di antara Samudera Pasifik dan Samudera Hindia yang membuat Indonesia menjadi pusat jalur perdagangan internasional. Pada lokasi desa Karangduwur yang berlokasi di Jawa Tengah memiliki potensi ekonomi maritim yang kuat tetapi juga memiliki risiko cuaca yang besar juga. Oleh karena itu tujuan dari penelitian ini yaitu untuk memprediksi tinggi gelombang dan kecepatan angin.   Metode prediksi yang digunakan pada penelitian kali ini adalah BiGRU (Bidirectional Gated Recurrent Unit) karena BiGRU memiliki hasil prediksi yang baik dibanding metode deep learning yang lain. Penelitian ini menggunakan data time series    yang berisi data tinggi gelombang dan kecepatan angin. Data unsur cuaca diambil per 12 jam dari bulan Januari 2021 – bulan April 2024. Metode BiGRU dapat digunakan dalam memprediksi cuaca maritim dengan fungsi aktivasi paling optimal untuk prediksi tinggi gelombang dan kecepatan angin ialah Relu, serta untuk prediksi tinggi gelombang dan kecepatan angin memiliki jumlah Batch Size yang optimal terdapat pada Batch Size 16. Dengan hasil nilai MAPE untuk prediksi ketinggian gelombang sebesar 1.6434% dan untuk prediksi kecepatan angin sebesar 0.6560%. Nilai MAPE pada model BiGRU memiliki nilai yang kecil dimana kurang dari 10% maka model BiGRU dikatakan sangat baik untuk prediksi pada data cuaca maritim. Kata kunci: Cuaca, Kecepetan angin, Tinggi gelombang, BiGRU   Abstract [Prediction of Wave Height and Wind Speed ​​on the Coast Using the BiGRU Method] Indonesia is located between the Pacific Ocean and the Indian Ocean, which makes it the center of international trade routes. Karangduwur village, located in Central Java, has strong maritime economic potential but also has great weather risks. Therefore, the purpose of this research is to predict wave height and wind speed.   The prediction method used in this research is BiGRU (Bidirectional Gated Recurrent Unit) because BiGRU has good prediction results compared to other deep learning methods. This research uses time series data containing wave height and wind speed data. Weather element data is taken per 12 hours from January 2021 - April 2024. The BiGRU method can be used in predicting maritime weather with the most optimal activation function for predicting wave height and wind speed is Relu, and for predicting wave height and wind speed, the optimal number of Batch Size is Batch Size 16. With the results of the MAPE value for wave height prediction of 1.6434% and for wind speed prediction of 0.6560%. The MAPE value in the BiGRU model has a small value which is less than 10%, so the BiGRU model is said to be very good for prediction on maritime weather data. Keywords: Weather, Wind speed, Wave height, BiGRU
Co-Authors Abdul Muid Abdul Wafi, Abdul Afiyat, Nur Agus Setiawan Ahmad Hanif Asyhar Aji, Rizal Fathoni Akh Syaiful Rijal Ala'uddin, M. Anwar, Farikhul Arindo, Jastin Wiliam Arumdanie, HSP Watulintang Asyhari, Aditya Roman Bagus Zaqqie Berti Ibmagara, Afridha Damayanti, Adelia Dianni Yusuf Dwi Wijanarko Ektrada, Erik Fadhilla, Suri Fahrus, Zhidan Fajar Ramadhan, Fajar FAJAR SETIAWAN Fathoni, M. Iqbal Firmansyah, Ferdian Gusminto, Eka Bambang Hadi Paramu Hadromi - Hani Khaulasari Haq, Dina Zatusiva Husni Mubarok Indarto, Tomi Jamilah, Ida Lutfiyatul Khalim, Abdul Khoiriyah, Robihatul Khoirul Umam Kholifah, Anik Nur Lina Andriyani, Lina M. Najib Mas’udi , Thoyib Mohammad Nur Shodiq, Mohammad Nur Musfiroh Musfiroh, Musfiroh Mustadi Mustadi, Mustadi Negara, Nanda Firdaus Pandu Novitasari , Dian Candra Rini Novitasari, Dian C Rini Nur Syamsi Nurwijayanti Prakosa Rachwibowo Pramana, Djien Prasetyo, Junaedi Adi Putri Oktavia, Nabiilah Putri, Risma Madurahma Rahmadhani, Sadesty Ratnasari, Avina Dwi Rifqi, Mochamad Misbahur Samsuri Samsuri Sari, Ribut Nawang Sepyan Purnama Kristanto Setiawan, Wahyu Ade Siregar, Hamdan Maruli Siti Nur Aisah Suardinata, I Wayan Subaekti, Hendrik Sukatja Suparno Suparno Sutarto, Auditya Purwandini Syafi’i, Moh. Syahputra, Orang Kaya Hasnanda Tofaynudin, Johan Indrus Wardana, Havy Wibowo, Galih Hendra Widiarso Dian Agus Widodo, Agung Wahyu Wildana, Dyvani Wahyu Yuliati, Dian