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All Journal Rotasi Media Kesehatan Masyarakat Indonesia Jurnal Simetris Agrifor : Jurnal Ilmu Pertanian dan Kehutanan Rekayasa Mesin EKSAKTA : Jurnal Penelitian dan Pembelajaran MIPA Loquen: English Studies Journal JURNAL EDUCATION AND DEVELOPMENT Lisanul Arab: Journal of Arabic Learning and Teaching Jurnal Ilmiah Akuntansi dan Bisnis Infotekmesin Jurnal Teknologi dan Riset Terapan (JATRA) Jurnal Pembelajaran Pemberdayaan Masyarakat (JP2M) Ta'lim al-'Arabiyyah: Jurnal Pendidikan Bahasa Arab dan Kebahasaaraban V-MAC (Virtual of Mechanical Engineering Article) Jurnal Profesi Insinyur Universitas Lampung Jurnal Minfo Polgan (JMP) Journal of Natural Science and Technology Adpertisi: Bidang Sains dan Teknologi Academic Journal Perspective : Education, Language, and Literature Journal of Applied Community Engagement (JACE) Innovative: Journal Of Social Science Research Lok Seva: Journal of Contemporary Community Service Buletin Ilmiah Ilmu Komputer dan Multimedia (BIIKMA) Jurnal Pengabdian Dinamika Jurnal Medika: Medika
Rahman Hakim
Sultan Ageng Tirtayasa University, Banten
Aerospace Engineering Agriculture, Biological Sciences & Forestry Arts Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Dentistry 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 Library & Information Science Mathematics Mechanical Engineering Medicine & Pharmacology Nursing Public Health Social Sciences Other

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Analisa Awal Kekasaran Permukaan Hasil Produksi Mesin Cetak Tiga Dimensi Terhadap Pengaruh Variasi Grit Size Sand Paper Hakim, Rahman; Sutisna, Nanang Ali
ROTASI Vol 21, No 3 (2019): VOLUME 21, NOMOR 3, JULI 2019
Publisher : Departemen Teknik Mesin, Fakultas Teknik, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (459.136 KB) | DOI: 10.14710/rotasi.21.3.134-139

Abstract

Hasil produksi cetak tiga dimensi tipe FDM (Fused Deposition Modeling) dengan menggunakan material PLA (Polylactid Acid) yang tergolong material polymer pada umumnya mempunyai permukaan yang kasar sehingga memerlukan pekerjaan akhir untuk membuat permukaanya lebih halus lagi. Tujuan percobaan ini ialah untuk mengetahui ukuran Grit Size mana saja yang bisa menghasilkan nilai kekasaran permukaan yang paling rendah atau dengan kata lain mempunyai nilai kehalusan permukaan yang paling tinggi. Salah satu caranya ialah dengan menggunakan kertas gosok dengan variasi tingkat Grit Size yang biasa ditampilkan pada kode angka pada label kertas gosok. Pada percobaan kali ini, kami menggunakan Grit Size dengan ukuran 1000CW, 1200CW dan 1500CW. Parameter uji pada mesin cetak tiga dimensi dengan merek Leapfrog Creatr HS ini menggunakan PLA berdiameter 1.75mm, dengan temperatur Nozzle dan Base Plate sebesar 230oC dan 30oC, serta mempunyai feedrate dan infill density masing-masing sebesar 70%. Setelah dilakukan percobaan sebanyak tiga kali pengambilan data, kami dapatkan hasil yang dimana dengan menggunakan sand paper dengan grit size 1500CW mempunyai nilai kekasaran permukaan (Ra) yang paling rendah, yaitu sebesar 4,392 μm (N8).
Project-Based Learning for the Design of Progressive Dies Supporting Tools Hakim, Rahman; Widiastuti, Hanifah; Wijayanti, Ita; Muvariz, Mufti Fathonah; Silaban, Andre Kevil
Jurnal Rekayasa Mesin Vol 12, No 1 (2021)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/10.21776/ub.jrm.2021.012.01.13

Abstract

In the oil and gas industry, manufacturing processes covered a variety of fields including pipe fittings production. Generally, this process involves a press machine utilized as a shape forming using punch-dies sets as mold profiles. The common problem found with the dies is the dimension of dies is not ergonomics to be handled manually by operators. Additionally, the support of dies tends to experience buckling upon receiving a pressure load of 15 MPa. Hence, alternative and practical designs are required, which have low deflection values and high fatigue resistance rates. Additionally, the designs are expected to be safe and economical. In this study, two alternative designs of punch-dies support are proposed. Subsequently, the FEA simulation was carried out for pipe fittings of 8 inches with ASME B16.9 standard size for WF Beam A36 Steel to compare the two proposed designs. The results show that alternative design 2 has a lower deflection value of 0.181 mm, a higher Factor of Safety of 3.21, and a higher cycle time of 358569 cycles than alternative design 1. Nevertheless, alternative design 2 has a higher production cost of 220 USD compared to alternative design 2. Therefore, this study shows that alternative design 2 has better performance while alternative design 1 is more economical.
Pengembangan Alat Bantu Arbor untuk Pembuatan Roda Gigi pada Mesin Frais Vertikal Widodo, Widodo; Hakim, Rahman
Jurnal Rekayasa Mesin Vol 12, No 2 (2021)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jrm.2021.012.02.6

Abstract

The machining process is included in the classification of metal cutting processes, which are used to change the shape of metal or non-metallic product by cutting, peeling or separating. One of the machines used in this cutting process is a vertical type milling machine. This machine functions to make a product, one of which was a gear. The supporting equipment needed to make this gear was a vertical arbor tool. The material used in the manufacture of this product was a cast carbon steel type using the design method for manufacturing and assembly (DFMA), which began by examining and identifying needs, conceptualizing and designing products and making these products tailored to the dimensional specifications of standard and common cutter modules in the market.  The results of the manufacture of this tool were directly tested for the manufacture of gears of various sizes and produced products whose deviations were within the tolerance of the measuring instrument, namely in the range 0 to 2%. In addition, the von Mises stress simulation at an engine speed of 150 Rpm, 450 Rpm and 750 Rpm and the resulting maximum stress was still below the yield limit, so it was safe to use.
الأخطاء الشائعة في مهارة الكلام لدى الطلبة الجدد بجامعة كياهي الحاج عبد الحليم موجوكرتو Azimah, Nahdliyyatul; Hakim, Rahman; Su'ada, Fatkhiyatus
Lisanul Arab: Journal of Arabic Learning and Teaching Vol 10 No 2 (2021): Lisanul Arab
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/la.v10i2.51933

Abstract

This study aims to describe the common mistakes that occur in new students majoring in Arabic on the practice of speaking skills. This type of research is qualitative through a descriptive approach. Collecting data through the method of speaking, listening, and observing. The results of this study indicate that the forms of language errors that often occur are in 1) phonology, 2) morphology, and 3) syntactic. In the phonological aspect, there are replacements in the pronunciation of hijaiyah letters, additions in pronunciation, and omissions. In the morphological aspect, errors were found in the use of auzānul fi'il, tastniyah, and jama' muannast salim. In the syntactic aspect, errors were found in the use of dhamāir munfasilah and muttashilah, jar majrūr, tarkīb na'ti, tarkīb 'adadi, jumlah fi'liyah, and jumlah ismiyah. To face these previous problems, the teacher provided the treatments on the following forms: (1) Presenting the pronunciation of Arabic letters and the pronunciation of the vocabulary intact. (2) Introduce short expressions. (3) Presenting sentence patterns. (4) Providing short dialogues, and certainly all of these qualities are applied to these students gradually and continuously in the class in the form of two-by-two. In addition, all these treatments were presented by the teacher through podcasts and YouTube, the crazy method, the rhetorical method, and the problem-solving method
Ekstraksi Besi Oksida (Fe2O3) dari Limbah Abu Terbang (Fly Ash) sebagai Upaya Pengembangan Industri Ramah Lingkungan Ardiansah, Ardiansah; Hakim, Rahman; Albar J, Muh. Azis
JNSTA ADPERTISI JOURNAL Vol. 3 No. 2 (2023): Juli 2023
Publisher : Aliansi Dosen Perguruan Tinggi Swasta Indonesia (Adpertisi)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62728/jnsta.v3i2.435

Abstract

Abu sisa pembakaran (Fly ash), dapat berdampak buruk pada lingkungan sekitar, sehingga diperlukan tindakan khusus untuk mengatasi masalah ini. Salah satu cara untuk mengatasi masalah ini adalah dengan memanfaatkan limbah batubara sebagai bahan material yang bernilai ekonomi. Pada penelitian ini dilakukan proses ekstraksi besi oksida (FeO3) menggunakan pelarut HCl dikarenakan asam klorida (HCl) yang merupakan pelarut yang paling efektif untuk proses pemisahan besi. Penelitian ini dimulai dengan melakukan pengovenan sampel untuk menghilangkan pengotor kemudian dilakukan analisis kandungan besi pada sampel dengan menggunakan X-Ray fluorescence (XRF). Selanjutnya dilakukan proses ekstraksi pada sampel dengan menggunakan pelarut asam klorida (HCl) dengan variasi konsentrasi yaitu 9, 10, 11 dan 12 N. Hasil ekstraksi tertinggi yang didapatkan pada penelitian ini adalah pada konsentrasi 9 dan 11 N yaitu sebesar 0,86% berdasarkan hasil analisis dengan menggunakan instrument Atomic Absobtion Spectrophotometer (AAS).
Perancangan Sistem Informasi Manajemen Berbasis Web Studi Kasus : PT. Kopi Titik Koma Bahagia Abadi Dwi Syafitri, Khairunisa; Pramana, Rangga; Abdi Virgiansyah, Ferdinand; Hakim, Rahman; Arrafi, Bintang; Samsoni; Handayani, Aprinia
Buletin Ilmiah Ilmu Komputer dan Multimedia Vol 2 No 1 (2024): Buletin Ilmiah Ilmu Komputer dan Multimedia (BIIKMA)
Publisher : Shofanah Media Berkah

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

Abstract

Penelitian ini merancang sistem informasi penjualan berbasis web pada PT. Titikoma Bahagia Abadi dengan metode Waterfall. Tujuannya adalah untuk mengotomatisasi pengelolaan data penjualan, inventaris, dan pembuatan laporan, yang sebelumnya ditangani secara manual. Metode Waterfall melibatkan tahapan analisis kebutuhan, perancangan sistem, implementasi, pengujian, dan pemeliharaan. Sistem yang dikembangkan mencakup fitur untuk manajemen produk, transaksi penjualan, manajemen inventaris, dan pelaporan penjualan. Hasilnya adalah sistem yang meningkatkan efisiensi operasional dan mendukung pengambilan keputusan yang lebih cepat dan akurat.
Unlocking the Hidden Impact: How Mental Workload Shapes Safety-Insights from NOSACQ-50 and NASA-TLX Method Saputra, Roni; Gemala, Mega; Nuraliza, Nuraliza; Ulfah, Nurul; Hakim, Rahman
Media Kesehatan Masyarakat Indonesia Vol. 19 No. 3: SEPTEMBER 2023
Publisher : Faculty of Public Health, Hasanuddin University, Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30597/mkmi.v19i3.24954

Abstract

The decrease in capability is caused by work fatigue and the level of error in work will increase. The increase in errors in work will cause the opportunity for work accidents in the industry which is the cause and effect of a work accident. This study aimed to determine solutions to eliminate mental workload from a safety climate based on NOSACQ-50 using the NASA-TLX method at PT. X part of The Batam City field in 2021. This quantitative study uses an analytical design with a cross-sectional approach between NOSACQ-50 to determine safety climate and NASA-TLX Method to determine mental workload based on the safety climate. The objects of this research are all workers of PT. X in 2021, with a sample size of 30 respondents. Statistical analysis used chi-square test. The results of this study show that Mental Workload in PT.X mostly was in moderate Level (73,3%) with the highest workload score was in the physical needs. NASA-TLX shows that Empowerment of Work Safety from Management was the significant factor causing mental stress. It was concluded that mental stress is caused by poor work arrangements. Suggestions for companies is to rotate work in each group of workers, especially riggers so that the workload is evenly distributed, and top management participates and is committed to carrying out OHS programs by directly demonstrating the programs that have been set.
The Effect of Concentration and Timing of Application of Green Tonik Foliar Fertilizer on theGrowth and Yield of Cucumber (Cucumis sativusL.) Mercy Variety Hakim, Rahman
Agrifor : Jurnal Ilmu Pertanian dan Kehutanan Vol 17, No 2 (2018): Oktober
Publisher : Universitas 17 Agustus 1945 Samarinda

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31293/af.v17i2.3618

Abstract

This experiment aims to: (1) to study of the effect of concentration and application timing of Green Tonik foliar fertilizeras well as their interaction on the growth and yield of cucumber plants; and (2) to find proper concentration and application timing of Green Tonik foliar fertilizer for better growth and yield of cucumber plants.The experiment carried out from March 2016 to May 2016, in the Village of Muara Bengkal Ilir, Muara Bengkal Subdistrict, East Kutai District.  It applied Completely Randomized Block Design with factorial experiment 4 x 3 and three replications.  The first factor was the concentration of the Green Tonik  foliarfertilizer (K) consists of 4 levels, namely: no Green Tonik foliar fertilizer application (k0), 1 ml l-1 water(k1), 2 ml l-1 water(k2), and 3 ml l-1 water(k3). The second factor wasinterval of the application time of Green Tonik foliar fertilizer(W) consists of 3 levels: 5, 10, 15, 20, and 25 days after planting (w1), 7, 14, 21, 28, and 35 days after planting (w2), and 10, 20, 30, 40, and 50 days after planting (w3).Result of the experiment revealed that : (1) concentration of Green Tonik foliar fertilizer application was affected significantly to very significantly on plant lenght at 30 and 45 days after planting, days of plant flowered, number of fruits per plant, diameter of fruit, weight of one fruit, and production of fruits, but no significant on the plant lenght at 15 days after planting, and lenght of fruit.  The highest production of fruit is attained by the 2 ml l-1 water (k3), namely 54,67 Mg ha-1, In reverse, the least production is attained by without Green Tonik foliar fertilizer (k0), namely 24,00 Mg ha ̵ ¹; (2) interval of Green Tonik foliar fertilizer application time was no significant on the plant lenght at 15 and 45 days after planting, days of plant flowered, number of fruits per plant, lenght of fruit, diameter of fruit, weight of one fruit, and production of fruit, but affected significant on the plant lenght at 30 days after planting; and (3) interaction between concentration and application timing of Green Tonik foliar fertilizer was no significant on the all parameters observed.
Kajian Strategi Pengembangan Potensi Desa Wisata Paralayang Gunung Bungkuk Di Kabupaten Magetan Dhikriana, Mifta Rina; HAKIM, RAHMAN; Suwarno, Suwarno; Alfarizi, Tito; Setyawan, Katon Galih
Journal of Applied Community Engagement Vol 4 No 2 (2024): Journal of Applied Community Engagement (JACE)
Publisher : ISAS (Indonesian Society of Applied Science)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52158/jace.v4i2.986

Abstract

This research is a feasibility study for the development of a paragliding tourism village in Gunung Bungkuk, Magetan, with the primary objective of determining the strategic development plan for paragliding destinations in the area. This study utilizes the SWOT method for identification and formulation of strategic plans, alongside the guidelines provided by the Ministry of Tourism and Creative Economy for pilot tourism villages. The results of this research can serve as the basis for decisions regarding the continuation of the development of the paragliding tourism village, including the formulation of management strategies, risk mitigation efforts, and enhancement of economic, social, and environmental potential in the area. Therefore, this research is expected to make a significant contribution to sustainable tourism development in the region.
WORKSHOP PEMBUATAN MEDIA PEMBELAJARAN KREATIF UNTUK PEMBELAJARAN BAHASA INGGRIS DAN KIMIA BAGI CALON GURU, GURU DAN DOSEN Rahmawati, Eri; Solfarina, Solfarina; Hakim, Rahman
Jurnal Pengabdian Dinamika Vol 8, No 2 (2021)
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62870/dinamika.v8i2.14236

Abstract

PembelajaranAbad21menempatkanketerampilanberkomunikasisebagaiketerampilanyangpentingdikembangkan bagi peserta didik karena sangat dibutuhkan dalam menjalani kehidupan saat ini. Keterampilankomunikasi tidak terlepas dari kemampuan menggunakan bahasa, baik bahasa Indonesia maupun BahasaInggris. Bahasa Inggris sangat dibutuhkan di era globalisasi sehingga dibekalkan pada pembelajar dari tingkatanSD sampai perguruan tinggi. Namun pada kenyataannya pembelajaran ini bagi sebagian besar peserta didiktidak lebih dari sekedar pengetahuan, bukan menjadi keterampilan berbahasa yang digunakan dalam kehidupansehari-hari apalagi untuk menjadi alat dalam mengembangkan kompetensi di bidang lain seperti mencariinformasi. Di sisi lain, Ilmu Kimia merupakan ilmu yang tidak bisa dilepaskan dari semua sisi kehidupanmanusia. Sebagian materi kimia merupakan pengetahuan yang dibutuhkan semua masyarakat untuk hidupdengan aman. Oleh karena itu,Jurusan Pendidikan Bahasa Inggris dan Pendidikan Kimia berusaha untukmelakukan pengabdian kepada masyarakat dengan sasaran calon guru, guru dan dosen Bahasa Inggris danKimia untuk membuat media kreatif yang dapat digunakan dalam belajar bahasa Inggris sekaligus Kimia atausebaliknya. Hal ini sekaligus menjadi pembelajaran bagi siswa dalam waktu yang bersamaan. Kegiatandirancang selama bulan Juni sampai November 2021 yang dimulai dari perencanaan, pelaksanaan dan evaluasikegiatan. Perencanaan meliputi analisis kebutuhan, menghubungi dan mencocokkan waktu dengan nara sumberdan panitia serta merancang kegiatan. Pelaksanaan meliputi pembukaan, sajian dari nara sumber, tanya jawabdan tindak lanjut. Kegiatan workshop dilaksanakan dari tanggal 14 sampai 16 Agustus 2021. Rangkaiankegiatan ditutup dengan evaluasi keterlaksanaan kegiatan dan persepsi peserta. Hasil yang diharapkan daripengabdian ini adalah terlaksananya kegiatan sesuai rencana dan media kreatif yang dibuat peserta. Darirangkaian workshop selama 3 hari didapatkan sebanyak 13 media cetak (seperti modul dan LKPD) dan 12media audio visual (video pembelajaran) baik berupa media pembelajaran Kimia dengan menggunakan bahasaInggris maupun media pembelajaran Bahasa Inggris yang berisi konten Kimia sederhana dalam kontekskehidupan sehari-hari.
Co-Authors Abdi Virgiansyah, Ferdinand Abi Fadila Adhe Aryswan Adiguna, Patria Af'idah, Euis Nur Afriantoro, Irfan Ahmad Marsehan Alfarizi, Tito Almada, Yoga Alfin Alwi, Abdullah Ardiansah, Ardiansah Arrafi, Bintang Azimah, Nahdliyyatul Baharudin, Budi Barcelona, Susi Batubara, Ninda Cahyagi, Danang Dhikriana, Mifta Rina Diah Wilujeng, Auliana Dwi Syafitri, Khairunisa Dzulfiqar, Mohamad Alif Fachry Abda El Rahman Fatah, Misbakhul Felani, Rani Okta Gemala, Mega Gustin, Oktaviano Handayani, Aprinia Hapsari, Windi Harahap, Andes Fuady Dharma Hartati, Aprya Duwi Hartono, Ricci Hasan, Sayyid Herlyansah, Reynaldi Bintang Hermana, Rifki Irawan, Benndy Haddli Irawan, Benny Haddli Isbandiyah Isbandiyah Julianti, Devi Khollilurrahman, Kholillurrahman Leksonowati, Nur Fitria Pujo Lubis, Hendri Arifin Maasah, Nur Alifah Manurung, Meilani Maskarai, Abulija Mastianna, Mastianna Matondang, Muhammad Roihan Merlina Sari Mufariz, Mufti Fathonah Muh. Azis Albar J. Muvariz, Mufti Fathonah Nasution, Sayyid Al Fattah Nugraha, M Affan Nur Abiyad, Muliawan Nuraliza, Nuraliza Nurmaini Ginting Nurmi, Aisyah Nurul Laili Oktavianto Gustin Pamungkas, Nurman Pikarani, pikarani Pramana, Rangga Prasetyo, Naufal Abdurrahman Pratama Putra, Vicqi Priyanto, Hasan Pujo Leksonowati, Nur Fitria Purba, Adi Putri, Naila Rahmawati, Eri Ratna Wulan Sari Reynaldi, Muhammad Ryan Rima, Rosmania Ritonga, Mina Warni Riyadi, Achmad Didi Riyama Ambarwati Rizki Wahyu Yunian Putra Roni Saputra Salsabilla, Krisna Tri Samsoni Saputra, Ihsan Saragih, Anre Satinem Satoto, Sapto Wiratno Septaningrum, Putri Setyawan, Katon Galih Silaban, Andre Kevil Sinaga, Roni Rahmat Siregar, Liana Tasya Rahma Siregar, Rama Putri Solfarina, Solfarina Stefani, Windy Su'ada, Fatkhiyatus Sulaeman, Asep Arwan Supriyanto Sutisna, Nanang Ali Suwarno Suwarno Ulfah, Nurul Wahyudi Wahyudi Widiastuti, Hanifah Widodo Widodo Wijayanti, Ita Yogantara Yuris Setyoadi