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All Journal Marine Fisheries: Jurnal Teknologi dan Manajemen Perikanan Laut Majalah Ilmiah MOMENTUM Sebatik Piston: Journal of Technical Engineering Jurnal Engine: Energi, Manufaktur, dan Material STEAM Engineering : Journal of Science, Technology, Education And Mechanical Engineering Vivabio : Jurnal Pengabdian Multidisiplin SWARNA
Deni Mulyana
Department Of Mechanical Engineering, Politeknik Negeri Bandung
Religion Aerospace Engineering Agriculture, Biological Sciences & Forestry Humanities Automotive Engineering Biochemistry, Genetics & Molecular Biology Computer Science & IT Control & Systems Engineering Education Energy Engineering Environmental Science Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mechanical Engineering Public Health

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Redesigning of 4 (Four) Blades Propeller Installed in a Wooden Fishing Boat in a Ship Yard in Tegal, Central Java Province Rifky Ismail; Mohammad Tauviqirrahman; Deni Mulyana; Fiki Firdaus; J. Jamari
Marine Fisheries : Journal of Marine Fisheries Technology and Management Vol. 10 No. 2 (2019): Marine Fisheries: Jurnal Teknologi dan Manajemen Perikanan Laut
Publisher : Bogor Agricultural University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (589.699 KB) | DOI: 10.29244/jmf.v10i2.30845

Abstract

For design of marine propeller, the energy supply from marine engine to the propeller should be converted to thrust force with minimum losses. Furthermore, the unwanted vibration and cavitation due to the overlooking a detail calculation of the propeller should be prohibited for increasing the fuel efficiency and life-span of the propeller. In the last few decades, most of small and medium sized enterprises (SMEs) focusing their work on ship component industry in Central Java Province Indonesia provide the marine propeller to the ship manufacturer and ship repairmen in some shipyards in northern part of Central Java port. The design of the propeller is never been observed and optimized. The aim of the present work is to redesign the installed propeller on a wooden fishing boat with the new optimized design using B-Series propeller theory approach. The reverse engineering method uses three-dimensional scanner to obtain the geometrical data of the installed ship propeller. The new optimized propeller design is obtained from free software calculation based on the boat and engine specification. The comparison shows that the new optimized propeller design has a wider blade and larger pitch and increases 20% of the open water efficiency of the propeller performance at lower engine rotation. Keywords: B-series design, fishing boat, marine propeller, redesign, optimization
PERANAN BUDAYA ORGANISASI DALAM MEWUJUDKAN GOOD UNIVERSITY GOVERNANCE (GUC) : SEBUAH IMPLIKASI SISTEM PENGENDALIAN INTERNAL DI POLITEKNIK NEGERI BANDUNG Mia Rosmiati; Hastuti Hastuti; Deni Mulyana; Yanti Rufaedah; Benny Barnas
Sebatik Vol 24 No 2 (2020): Desember 2020
Publisher : STMIK Widya Cipta Dharma

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

Abstract

Tata kelola perguruan tinggi yang baik di masa globalisasi ini sudah menjadi tujuan atau cita-cita dari setiap institusi pendidikan tinggi yang ada di Indonesia, dan perwujudan dari cita-cita tersebut akan tercapai apabila perguruan tinggi sudah melaksanakan sistem pengendalian dengan baik. Penelitian ini bertujuan untuk menganalisis peranan budaya organisasi dalam mewujudkan Good University Governance (GUG) melalui pelaksanaan kebijakan Sistem Pengendalian Internal (SPI) di Politeknik Negeri Bandung (POLBAN). Metode penelitian yang digunakan adalah deskriptif analisis dengan pendekatan kualitatif di mana penulis berupaya untuk memaparkan temuan yang diperoleh dari sumber data baik primer yang diperoleh melalui wawancara dengan informan maupun data sekunder berupa peraturan-peraturan mengenai sistem pengendalian, serta menganalisis kaitan antara dimensi yang ada dalam budaya organisasi dengan prinsip-prinsip yang terdapat dalam GUG. Hasil dari penelitian ini menunjukkan bahwa keberhasilan pelaksanaan SPI di POLBAN erat kaitannya dengan iklim atau budaya organisasi dari perguruan tinggi tersebut sehingga masih ada dimensi yang belum terlaksana secara benar dan menyeluruh. Apabila budaya yang dikembangkan dalam mengelola perguruan tinggi tersebut adalah budaya yang baik dan positif, maka cita-cita untuk mewujudkan tata kelola perguruan tinggi yang baik akan dengan mudah dicapai, demikian juga sebaliknya. Kesimpulan dari penelitian ini adalah perguruan tinggi perlu untuk mengembangkan budaya organisasi yang kondusif sehingga akan mendukung keberhasilan pelaksanaan sistem pengendalian internal di perguruan tinggi khususnya POLBAN yang pada akhirnya akan membantu perwujudan dari Good University Governance.
OPTIMASI PARAMETER PEMOTONGAN CNC WET MILLING TERHADAP KEKASARAN PERMUKAAN STAINLESS STEEL AISI 304 Deni Mulyana; Ilham Azmy; Alvaro Gabrian; Rudy Yuni Widiatmoko; Petrus Londa
Steam Engineering Vol. 4 No. 1 (2022): STEAM Engineering, Vol. 4, No. 1, September 2022
Publisher : Program Studi Pendidikan Teknik Mesin, Fakultas Keguruan dan Ilmu Pendidikan, Universitas Palangka Raya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (594.069 KB) | DOI: 10.37304/jptm.v4i1.5269

Abstract

Optimization of CNC wet milling cutting parameters for stainless steel AISI 304 was successfully attempted by using Taguchi method (S/N ratio and ANOVA). L9 orthogonal array is utilized for designing the experiments with 3 levels of spindle speeds and feed rates with an increment depth of cut. The effect of cutting parameters on surface roughness was examined. According to S/N ratio’s response table, the result obtained for spindle speed fervently indicates that spindle speed is the most pivotal factor for impacting the surface roughness than feed rate for stainless steel AISI 304. ANOVA results depicted that the contribution percentage of spindle speed for surface roughness is higher than feed. Optimum values of cutting parameters were endowed at a spindle speed of 3184 rpm and a feed rate of 1528,4 mm/min. The experimental values at optimum cutting condition were compared with predicted values and it reveals a significant congruity with the experimental results with a low error percentage. Therefore, this experiment aims to develop the productivity and quality of CNC milling operations for stainless steel AISI 304. In addition, number of studies for cutting parameter optimization stainless steel AISI 304 was not barely done yet. Hereafter, more investigations still needed to optimize the cutting parameters of this stainless steel AISI 304 for various machining operations specifically on CNC milling process.
PELATIHAN DAN PENDAMPINGAN MANAJERIAL DAN AKUNTANSI KOPERASI BAGI KOPERASI DI WILAYAH KOTA CIMAHI Sumiyati Sumiyati; Yanti Rufaedah; Hastuti Hastuti; Benny Barnas; Riauli S. Hutapea; Rosmiati Rosmiati; Deni Mulyana
SWARNA: Jurnal Pengabdian Kepada Masyarakat Vol. 1 No. 2 (2022): SWARNA: Jurnal Pengabdian Kepada Masyarakat, Oktober 2022
Publisher : LPPM Sekolah Tinggi Ilmu Ekonomi 45 Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55681/swarna.v1i2.68

Abstract

Data statistik menunjukan, dari 262 koperasi di Kota Cimahi, tidak seluruhnya aktif dan sehat. Jumlah koperasi yang melakukan RAT sejak tahun 2016 hanya sebanyak 76 koperasi dari 420 koperasi, atau sebesar 18,10%. Sementara tahun 2020 mengalami penurunan menjadi 33,67%, yaitu dari 105 koperasi menjadi 70 koperasi, sedangkan koperasi dalam kategori sehat turun sebesar 72,5%, dari 40 koperasi menjadi hanya 11 koperasi. Penurunan yang disebabkan situasi Pandemi Covid 19, diperburuk pula oleh kegagalan pengurus koperasi dalam membuat laporan keuangan sebagai acuan RAT. RAT sebagai syarat agar koperasi tetap eksis dan tidak dibubarkan, maka penanganan terhadap masalah ini harus dilakukan, antara lain melalui kegiatan pelatihan dan pendampingan. Pelatihan dan pendampingan diikuti oleh 20 peserta dari koperasi aktif yang belum melaksanakan RAT. Pelatihan dilaksanakan selama3 hari , dilanjutkan dengan pendampingan berupa konsultasi dan monitoring penyusunaan laporan keuangan selama 2 hari. Baik pelatihan maupun pendampingan dilaksanakan secara daring, dan memperlihatkan hasil yang positif.
Pengaruh Parameter Pemotongan Proses CNC Wet Milling Stainless Steel AISI 316 Terhadap Kekasaran Permukaan Ilham Azmy; Deni Mulyana; Alvaro Gabrian; Rudy Yuni Widiatmoko; Petrus Londa
JURNAL ILMIAH MOMENTUM Vol 18, No 2 (2022)
Publisher : Universitas Wahid Hasyim

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36499/jim.v18i2.7134

Abstract

Proses pemesinan CNC wet milling pada material stainless steel AISI 316 dengan beberapa parameter pemotongan telah berhasil dilakukan dalam penelitian ini. Analisis optimasi parameter pemotongan menggunakan metode Taguchi dengan teknik perhitungan S/N ratio dan ANOVA. Untuk merancang proses eksperimentasi CNC wet milling dengan tiga parameter pemotongan yang bervariasi, maka digunakan teknik L9 orthogonal array. Dari tabel S/N ratio yang telah dianalisis, maka didapatkan bahwa kecepatan pemotongan (feed rate) menjadi faktor yang paling berpengaruh terhadap perubahan kekasaran permukaan bila dibandingkan dengan parameter kecepatan spindel dan kedalaman pemotongan pada material stainless steel AISI 316. Disisi lain, hasil pengolahan data ANOVA menunjukkan bahwa persentase kontribusi spindle speed lebih berpengaruh terhadap kekasaran permukaan bila dibandingkan feed rate. Paramater pemotongan optimal yang ditunjukkan dari spindle speed sebesar 3184 rpm, feed rate sebesar 541,4 mm/min dan depth of cut sebesar 0,3 mm. Parameter pemotongan optimal yang merupakan hasil proses eksperimen ini telah dibandingkan dengan nilai prediksi yang selanjutnya memperlihatkan korelasi yang berkaitan dengan nilai error yang relatif sangat kecil. Maka dari itu, penelitian ini memberikan sumbangsih pengembangan yang signifikan pada peningkatan machineability, kualitas, dan produktifitas proses pemesinan CNC milling untuk material stainless steel AISI 316.
Perancangan Alat Pemotong Tulang Daging Dengan Chainsaw Skala Industri Rumahan Albert Daniel Saragih; Muhammad Rifqi Aliftyo; Deni Mulyana
Piston: Journal of Technical Engineering Vol 6, No 1 (2022)
Publisher : Prodi Teknik Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (491.521 KB) | DOI: 10.32493/pjte.v6i1.19493

Abstract

The technique of bones saw was used by many traders still uses the conventional method, namely with a butcher knife. To make cutting more efficient, bone saw machines are created which are widely marketed. However, the use of these tools is considered inefficient because during operation the meat attached to the bones will move into the machine through the cutting tool so that the motor work becomes heavy and even the cutting tools are prone to breaking, then the electrical power required is large enough to make traders use more conventional methods. This manufacturing technique aims to produce designs and working drawings of meat bone cutting machines and the components needed. Bone cutting machines are designed to be used by various groups of bone traders, market traders or home-based traders to increase production and use low electrical power. The machine was designed to be more efficient than the previous by modifying the cutting tool using a saw type, namely a chainsaw with a low electrical power of 550 Watt or equivalent to 0.75 HP and a blade speed of 2500 rpm. The machine was designed to use a spring to raise the machine automatically. The dimension of 800 mm × 700 mm × 1415 mm has double safety that is protected by a cover and a lever to provide distance between the machine and the operator.
Peningkatan Kompetensi Menyusun Laporan Keuangan bagi Koperasi Modern di Wilayah Kota Cimahi Jawa Barat Hastuti Hastuti; Yanti Rufaedah; Mia Rosmiati; Benny Barnas; Ita Susanti; Deni Mulyana
VIVABIO: Jurnal Pengabdian Multidisiplin Vol. 5 No. 2 (2023): VIVABIO:Jurnal Pengabdian Multidisiplin
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35799/vivabio.v5i2.48556

Abstract

Cooperative financial reports are one of the conditions for holding an Annual Member Meeting and issuing cooperative identification numbers for the realization of modern cooperatives. Cooperatives in the Cimahi City area have not all been able to fulfill these requirements. This community service program is aimed at increasing the competency of compiling financial reports for cooperative bookkeeping officers in the Cimahi City area which will be held in September 2022. The method of implementation is by compiling guidelines for preparing cooperative financial reports based on SAK ETAP and then delivering them by providing training and mentoring for 5 mixed day activities. The training materials consist of legal aspects of modern cooperatives, management of modern cooperatives and preparation of cooperative financial reports. The implementation of the activity took place at the TechnoPark Building, Cimahi City, West Java, which was attended by 23 participants as representatives of cooperatives in the Cimahi City area, whose data was obtained from the Department of Trade, Cooperatives, Small and Medium Enterprises, and Industry of Cimahi City. Based on the assessment of the results of the evaluation of training materials, there was an increase in understanding for the training participants and as many as 18 participants (78%) increased their competence by being able to complete accounting cases in preparing cooperative financial reports and by correcting their cooperative financial reports independently. Evaluation is also carried out on the success of the implementation of this program as a whole.
Perancangan Alat Pemotong Tulang Daging Dengan Chainsaw Skala Industri Rumahan Albert Daniel Saragih; Muhammad Rifqi Aliftyo; Deni Mulyana
Piston: Journal of Technical Engineering Vol 6, No 1 (2022)
Publisher : Prodi Teknik Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32493/pjte.v6i1.19493

Abstract

The technique of bones saw was used by many traders still uses the conventional method, namely with a butcher knife. To make cutting more efficient, bone saw machines are created which are widely marketed. However, the use of these tools is considered inefficient because during operation the meat attached to the bones will move into the machine through the cutting tool so that the motor work becomes heavy and even the cutting tools are prone to breaking, then the electrical power required is large enough to make traders use more conventional methods. This manufacturing technique aims to produce designs and working drawings of meat bone cutting machines and the components needed. Bone cutting machines are designed to be used by various groups of bone traders, market traders or home-based traders to increase production and use low electrical power. The machine was designed to be more efficient than the previous by modifying the cutting tool using a saw type, namely a chainsaw with a low electrical power of 550 Watt or equivalent to 0.75 HP and a blade speed of 2500 rpm. The machine was designed to use a spring to raise the machine automatically. The dimension of 800 mm × 700 mm × 1415 mm has double safety that is protected by a cover and a lever to provide distance between the machine and the operator.
Optimization of Cutting Parameter CNC Wet Milling Process of Austenitic Stainless Steel on Surface Roughness Achmad Hata; Rudy Yuni Widiatmoko; Deni Mulyana; Ilham Azmy
Jurnal Engine: Energi, Manufaktur, dan Material Vol 7, No 2 (2023)
Publisher : Proklamasi 45 University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30588/jeemm.v7i2.1591

Abstract

Austenitic stainless steel (SS) is widely used in various industries owing to its good mechanical properties and corrosion resistance. However, the machineability of this material remains a challenge to measure for better application. In this research, the optimization of the machining parameter CNC wet milling process for austenitic stainless steels (AISI 304 and AISI 316) was successfully finished by utilizing the Taguchi method (S/N ratio and ANOVA) to determine its machineability specifically on surface roughness. The optimum surface roughness of AISI 304 stainless steel is about 0,21 µm within a spindle speed of 3184 rpm, a feed rate of 1528,4 mm/min in the depth of 0,3 mm. The depth of cut parameter during CNC milling was considered as the most influential parameter to optimize surface roughness in AISI 304 stainless steel. Meanwhile, during the cutting process of AISI 316 stainless steel, the optimum surface roughness was obtained at a spindle speed of 3184 rpm, feed rate of 541,4 mm/min in the depth of 0,3 mm with a surface roughness value of 0,24 µm. The results depicted that feed rate held a pivotal factor in determining surface roughness in the AISI 316 stainless steel milling process. Therefore, this research gives impactful insight into developing a good milling process that can increase the machineability, quality, and productivity of AISI 304 and AISI 316 stainless steels.
Co-Authors Achmad Hata Alvaro Gabrian Barnas, Benny Daniel Saragih, Albert Fiki Firdaus Hastuti Hastuti Ilham Azmy Ilham Azmy Ita Susanti J. Jamari Mia Rosmiati Mohammad Tauviqirrahman Muhammad Rifqi Aliftyo Petrus Londa Riauli S. Hutapea Rifky Ismail Rudy Yuni Widiatmoko Rudy Yuni Widiatmoko SUMIYATI SUMIYATI Yanti Rufaedah