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All Journal Rekayasa Mesin Jurnal Inotera Jurnal Energi dan Teknologi Manufaktur JPIn : Jurnal Pendidik Indonesia JURPIKAT (Jurnal Pengabdian Kepada Masyarakat) BERKAT: Jurnal Pemberdayaan Masyarakat International Journal of Research in Vocational Studies (IJRVOCAS) Sinergi Polmed : Jurnal Ilmiah Teknik Mesin Majalah Ilmiah METHODA Jurnal Tiyasadarma: Jurnal Pengabdian Kepada Masyarakat
Muhammad Anhar Pulungan
Politeknik Negeri Medan
Aerospace Engineering Agriculture, Biological Sciences & Forestry Humanities Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Dentistry Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mechanical Engineering Medicine & Pharmacology Public Health Social Sciences Other

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Modifikasi Alternator dan Sistem Kelistrikan Untuk Peningkatan Daya Listrik Sepeda Motor 125 cc Alfi Tranggono Agus Salim; Eko Darmawan; Yoga Ahdiat Fakhrudi; Izhary Siregar; Balkhaya Balkhaya; Muhammad Anhar Pulungan; Sufiyanto Sufiyanto; Thenny Daus Salamoni
Jurnal Energi dan Teknologi Manufaktur Vol 2 No 02 (2019)
Publisher : Polinema Press, Politeknik Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33795/jetm.v2i02.46

Abstract

The alternator on the motor is one component of the vehicle that can be used to improve its utilization. Modifications to the alternator on the vehicle are made to increase electric power. The working principle of an electric generator is in accordance with the law of faraday if a conductor is rotated in a magnetic field until it crosses the magnetic force line (GGM), it will cause an electric force line (GGL) in volts at the end of the conductor. In the alternator to be used, the lighting coil resistance is 0.24 - 0.36 Ω and the charging is 12.3 - 13.3 V at 1500 rpm. The research conducted was an experiment by comparing the alternator output voltage before it was modified with the alternator output that had been modified. Modification of the alternator is done by the method of load variation and replacement of the diameter of the coil along with the number of turns on the alternator. Measurement of alternator before and after modification shows results that are directly proportional to the output of the alternator at 1,000 rpm - 8,000 rpm. The results of three tests can be concluded that the modification of the alternator has increased from 6.42 A for the standard alternator to 13.7 A for the modification alternator.
Pengaruh Ketebalan Terhadap Daya Serap Energi Impak pada Rompi Anti Peluru yang Terbuat dari Komposit Hgm-Epoxy Dan Serat Karbon Muhammad Anhar Pulungan; Sutikno Sutikno
Jurnal Inotera Vol. 2 No. 2 (2017): July-December 2017
Publisher : LPPM Politeknik Aceh Selatan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (222.706 KB) | DOI: 10.31572/inotera.Vol2.Iss2.2017.ID33

Abstract

Bulletproof vests are outer clothing commonly used to protect military personnel from projectile attacks and explosion material distributions. In this study the bulletproof vests were made of composite particles composed of an epoxy matrix with a Hollow Glass Microsphere (HGM) amplifier and carbon fiber. The study was conducted by doing simulation analysis using Finite Element Method in accordance with NIJ (National Institute of Justice) of American Standard 0101.06 for class IIIA weapons category. The thickness of bulletproof vest was varied from 1 to 20 mm in order to obtain the optimal thickness. After obtaining optimal thickness of the bulletproof vest, then verification with experimental will be done to validate the simulation result. The results showed that the increase in the thickness has increase the toughness and rigidity of a bulletproof vest. A bulletproof vest with a thickness of 20 mm able to absorb bullet energy of 348.27 Joule and kinetic energy which passed the body of 138, 77 Joule with a penetration depth of 5.54 mm. Thus, it has met the NIJ Standard 0101.06 standard of U.S. The energy passed to the body is smaller than 170 Joule.
A Analysis of Student Mastery Levels on Composite Material Subjects in South Aceh Polytechnic Mechanical Engineering Study Program Muhammad Anhar Pulungan; Sera Delta Tanjung
Jurnal Inotera Vol. 4 No. 2 (2019): July-December 2019
Publisher : LPPM Politeknik Aceh Selatan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (273.226 KB) | DOI: 10.31572/inotera.Vol4.Iss2.2019.ID77

Abstract

Research is included into the type of descriptive study using quantitative and qualitative approaches. The research procedure includes stage 1) initial observation, 2) preparation, 3) implementation, 4) evaluation, and 5) final results. The subjects in this study were the second semester students of Mechanical Engineering Study Program, totaling 24 people. Data collection techniques used 1) test questions, 2) interviews, 3) documentation, and 4) field notes. Data analysis techniques mastery level of the material were analyzed using the percentage formula. Interview data were analyzed in stages 1) reducing data, 2) presenting data, and 3) summarizing data. Instrument documentation and field notes were analyzed narratively. The results of data analysis on the level of student mastery of composite material shows that the group of students in the category of mastery is very mastering (SM) 0 students (0%), the category of mastery mastering (M) is 9 students (23.68%), the category of mastery is less mastering (KM ) 16 students (42.11%), mastery category not mastered (TM) 13 students (34.21%). Students who mastered the mastery-1 category were 15 students (39.47%), who mastered the mastery-2 category by 22 students (57.89%), who mastered the mastery-3 category by 9 students (23.68%) and categories mastery-4 as many as 0 students (0%). Interview results obtained by some students 'mistakes in mastering composite material courses, namely a) errors in the use of formulas or concept errors, b) errors in algebraic fraction operations, c) students' lack of attention to the tests conducted, d) errors in inputting parameter values, e) errors in the operation of exponential numbers, f) errors in formulating problems in the form of formulas (mathematical modeling), and g) principle errors.
Building Up Student Learning Outcomes Through Contextual Teaching and Learning (CTL) Learning Approaches in Discrete Mathematics Subjects in The Computer Engineering Study Program of The South Aceh Polytechnic Fera Anugreni; Muhammad Anhar Pulungan
Jurnal Inotera Vol. 5 No. 2 (2020): July - December 2020
Publisher : LPPM Politeknik Aceh Selatan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31572/inotera.Vol5.Iss2.2020.ID128

Abstract

Students graduating with a minimum score of C in the 2018/2019 even semester is 47%. Given the importance of the course objectives and the low learning outcomes achieved, a learning approach is applied which is expected to create active learning for students. To present active learning, the learning approach used must be familiar with students' daily lives. One learning approach that can emulate the daily lives of students is the Contextual Teaching and Learning (CTL) learning approach. The formulation of the problems in this study are a) is the application of CTL able to improve the learning outcomes of students in semester II of the Computer Engineering Study Program in Discrete Mathematics courses ?, b) how do lecturers manage learning with the CTL approach ?, and c) how are student learning activities using CTL? The purpose of this study was to a) determine the improvement of student learning outcomes, b) to determine the ability of lecturers to manage learning activities, and c) to determine student activities in learning. The research approach used in this research is quantitative and qualitative approaches, while the type of research is classroom action research (PTK). The subjects of this study were 16 students in the second semester of the Computer Engineering Study Program. The data collection techniques used in this study were a) test questions, and b) observation sheets. The study consisted of 2 (two) cycles, where the first cycle consisted of 3 meetings, while the second cycle consisted of 2 meetings. The results showed that the ability of lecturers to manage learning in cycles I and II was in a good category and the ability of lecturers to manage learning had increased when compared to cycle I to cycle II, from 3.88 to 4.06. Student learning activities in cycle II increased when compared to cycle I. The results of the first cycle test showed that 11 students completed, while in cycle II the results obtained 12 students completed. The percentage of student learning completeness during the first cycle to the second cycle was 68.75% and 75%. The increase in student learning completeness between cycle I and cycle II is 75% - 68.75% = 6.25%.
Student Mastery of Association Concept In Aceh Selatan Polytechnic Computer Engineering Program Fera Anugreni; Muhammad Anhar Pulungan; Asmaidi
Jurnal Inotera Vol. 6 No. 1 (2021): January-June 2021
Publisher : LPPM Politeknik Aceh Selatan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31572/inotera.Vol6.Iss1.2021.ID130

Abstract

Mathematical Association material becomes difficult for students to learn since it is described in the form of set-forming notation and story-based questions (applied). Moreover, they find it difficult to determine the number of subsets with several determined members. The author's observations while teaching at the South Aceh Polytechnic Computer Engineering Study Program for the 2018/2019 academic year obtained data that students did not master Discrete Mathematics subjects, especially the material of the Association. This can be seen in daily assignments, midterm exams, and final semester exams. The author as a lecturer in the Study Program was disappointed with the results obtained. The approach and type of this research is a quantitative approach and a pure experimental type of research. The research sample of the second-semester students of the South Aceh Polytechnic Computer Engineering Study Program for the 2019/2020 academic year was 16 students. The research data was the test scores collected from students. The instrument in this study was a test question. The data collection technique in this research is a written test. Data analysis used t-test at a significant level α = 0,05, dk = 4, with standard value of = 69. Based on the analysis gained and . Thus, the result turns out or 1.83 > 1,75. Thus it is concluded that the mastery of Computer Engineering Study Program students at the Polytechnic of South Aceh for the 2019/2020 academic year in understanding the set material has reached a level of success.
PERANCANGAN PISAU PENCACAH MESIN PENCACAH PLASTIK POLYETHYLENE TEREPHTHALATE PET Arie Sucipto; Leonardo Manurung; Khairul Rahmi; Nelson Manurung; Sumartono Sumartono; Muhammad Anhar Pulungan; Piktor Tarigan
SINERGI POLMED: Jurnal Ilmiah Teknik Mesin Vol. 3 No. 1 (2022): Edisi Februari
Publisher : Politeknik Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (241.801 KB) | DOI: 10.51510/sinergipolmed.v3i1.706

Abstract

Plastik merupakan jenis sampah yang sulit terurai, karena sifat plastik yang tak mudah terbiodegradasi. Plastik PET merupakan plastik yang sering digunakan sebagai wadah makanan. Plastik PET dapat di temukan pada hampis semua botol air mineral. Plastik ini dirancang untuk satu kali penggunaan saja. untuk mengurangi dampak lingkungan dari sampah plastik, maka material plastik harus didaur ulang untuk mendapatkan kembali produk plastiknya maupun untuk menghasilkan produk lain yang bernilai ekonomis dengan cara dicacah terlebih dahulu. Dengan demikian penulis mengambil judul tugas akhir “Rancang bangun mesin pencacah plastik Polyethylene terephthalate kapasitas 60 Kg/jam”. Dalam perancangan mesin pencacah plastik ini dilakukan perancangan berupa perhitungan dan pemilihan komponen – komponen mesin antara lain : mata pisau, poros, bantalan,motor, sabuk dan puli. Dan juga melakukan perancangan berupa desain gambar. Mesin pencacah plastik ini memiliki dimensi 395 mm × 720 mm × 1305 mm dengan konstruksi yang sederhana dan mudah dioperasikan, yaitu dengan menggunakan satu buah poros dan 8 buah mata pisau yang terdiri dari 6 buah pisau dinamis dan 2 buah pisau statis. Penggerak utama mesin pencacah plastik menggunakan motor bensin sebesar 6 HP dengan putaran 2200 rpm.
Analisis Vibrasi Terhadap Massa Pakai Pompa Suntrifugal Unit 4 Fatty Acid Pada PT. Unilever Oleochemical Indonesia Muhammad Anhar Pulungan; Siti Maretia Benu; Sihar Siahaan
Jurnal Pendidik Indonesia (JPIn) Vol 5, No 2: Oktober 2022
Publisher : Yayasan Pendidikan Intan Cendekia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47165/jpin.v5i2.437

Abstract

Pompa merupakan salah satu komponen penting di industri oleochemical. Peran pompa disini sebagai alat transfer produk dari satu unit ke unit yang lain. Dalam menjalankan fungsinya ada beberapa faktor yang mempengaruhi, salah satunya vibrasi. Vibrasi merupakan gerakan bolak balik dari mesin atau elemen mesin dari posisi setimbang (diam). Vibrasi juga merupakan salah satu parameter analisa dalam predictive maintenance khususnya digunakan untuk mendeteksi sumber dan gejala kerusakan. Kerusakan ini biasanya disebabkan karena beberapa hal diantaranya kerusakan yang disebabkan oleh kesalahan mekanik dan kerusakan yang disebabkan karena permasalahan bearing. Keruaskan mekanik contohnya misalignment, unbalance, dan juga loosenenss. Sedangkan untuk masalah bearing itu berupa BPFO, BPFI, BSF, dan FTF. Tujuan dilakukannya penelitian ini adalah untuk menganalisis penyebab kerusakan yang terjadi pada pompa sentrifugal agar bisa menghindari hal yang akan mengakibatkan terjadinya breakdown maintenance. Metode yang penulis gunakan dalam pengumpulan data vibrasi adalah observasi dan analisa data. Setelah melakukan analisa vibrasi terhadap pompa sentrifugal pada unit 4, diperoleh hasil temuan yang mengindikasikan kerusakan pada bearing yaitu BPFO. Sehingga dapat disimpulkan bahwa diperlukan perbaikan dengan penggantian bearing.
Analysis of the Effect of Tapioca Flour Adhesive on the Characteristics of Palm Oli Empty Charcoal Briquettes Muhammad Anhar Pulungan; Sihar Siahaan; Siti Maretia Benu
International Journal of Research in Vocational Studies (IJRVOCAS) Vol. 2 No. 4 (2023): IJRVOCAS - Special Issues - International Conference on Science, Technology and
Publisher : Yayasan Ghalih Pelopor Pendidikan (Ghalih Foundation)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53893/ijrvocas.v2i4.156

Abstract

Palm oil solid waste such as oil palm empty fruit bunches (TKKS) if not processed can be explained by the environment. This study attempts to study the utilization of oil palm empty fruit bunches as charcoal briquettes. Charcoal briquettes are one of the alternative fuels to replace fuel gas and firewood charcoal. The empty sign of the oil palm is burned so that it becomes charcoal, then the charcoal is ground and sifted, after being sifted it is given a mixture of adhesive, namely tapioca flour. The mixed charcoal is put into a briquette press. The research was conducted on a laboratory scale with a carbonization process at a temperature of 500℃, carbonization time of 3 hours. The process of drying briquettes at a temperature of 100⁰C for 1 hour. Comparison of the composition of 1000 grams of empty oil palm fruit bunches with 20% tapioca starch adhesive. From the results of the study, the briquette values obtained were as follows: 4775.18 cal/g, 6.96% water, 9.18% ash content, and 84 minutes of burning time. The empty bunches of charcoal briquettes were tested according to the SNI No.1/6235/2000 standard, which is a minimum calorific value of 5000 cal/gram, a maximum water content of 8%, and an ash content of 8%. The parameters of water content and burn time have met the standard. The parameters of the ash content and calorific value of the samples taken and tested have not met the standard of SNI No.1/6235/2000. One of the steps that can be tried to improve the quality of the ash content and calorific value is to rearrange the composition of the adhesive.
Performance Test of 1500 cc Fuel Motorcycle Using Pertalite – Bioethanol Mixture Fuel on Exhaust Gas Nelson Manurung; Muhammad Anhar Pulungan; Billy Christian Manurung; Enzo W. B Siahaan; Sihar Siahaan
International Journal of Research in Vocational Studies (IJRVOCAS) Vol. 2 No. 4 (2023): IJRVOCAS - Special Issues - International Conference on Science, Technology and
Publisher : Yayasan Ghalih Pelopor Pendidikan (Ghalih Foundation)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53893/ijrvocas.v2i4.159

Abstract

The increasing world oil prices followed by the increasing demand for fossil fuels as well as the issue of the energy crisis and global warming which demands a better level of environmental quality have encouraged the government to take good policies in overcoming them. Currently the world has been thinking about alternative energy that can be used for diesel or otto motors. One of the alternative fuels developed is alcohol fuel. Alcohol is a type of hydrocarbon in which one of the hydrogen atoms is replaced by the hydroxyl radical OH. Many agricultural products in Indo-nesia have the potential to be developed as bioethanol. In this study, the effect of adding bioethanol on pertalite fuel will be studied. This is because pertalite is a fuel that is in accordance with the demands of automotive needs and developments. This study aims to determine the comparison of power, torque, and air-fuel ratio as well as to determine the comparison of the content of exhaust gas compounds tested on the Toyota Vios Limo 1500CC car using pertalite (E0) fuel, 10% pertalite-bioethanol mixture (E10). and 15% (E15), 20% (E20). The test results obtained that the calorific value of Pertalite fuel is 49411.98 kJ/kg, 10% gasohol has a value of 46764.82 kJ/kg, 15% gasohol has a value of 44262.82 kJ/kg, and then 20% gasohol has a val-ue of 45735.42 kJ/kg. The test results obtained an average torque and power per-formance of 10% gasohol fuel of 109.09 Nm and 71.73 HP. The highest air-fuel ratio in fuel but the table shows the highest air-fuel ratio in 15% gasohol fuel is 15.46 and then the lowest air-fuel ratio in 10% gasohol fuel is 11.58. Exhaust emis-sion levels for each compound tested for each fuel are still below the standard vehicle exhaust emission thresholds set by Toyota and the environmental agency.
SIMULASI PROSES PEMESINAN CETAKAN PROPELLER BLADE DENGAN PEMODELAN PROFIL AIRFOIL Balkhaya Balkhaya; Ihsan Ihsan; Muhammad Anhar Pulungan
Majalah Ilmiah METHODA Vol. 8 No. 1 (2018): Majalah Ilmiah METHODA
Publisher : Universitas Methodist Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46880/methoda.Vol8No1.pp1-5

Abstract

Pemanfaatan kincir angin untuk menghasilkan sumber daya energi alternatif semakin giat dilakukan diberbagai daerah. Dalam pengoperasiannya, kincir angin selalu memiliki masalah pada bahan dan bentuk yang tidak sama, seperti pelapukan dan tidak seimbang. Permasalahan tersebut dapat diatasi dengan mendapatkan propeller blade (daun baling-baling) yang seimbang, tahan dan simetris terhadap perubahan kecepatan angin yang sangat radikal. Proses pembuatan propeller blade dilakukan pemodelan profil airfoil dalam bentuk matematik dengan menggunakan data-data diinput dari NACA yang sudah diketahui titik koordinat.. Bentuk profil airfoil untuk propeller blade direncanakan dimana titik koordinat profil airfoil NACA merupakan fungsi dari maksimum chamber dan thickness yang dapat ditentukan. Menentukan chamber line, thickness dan titik-titik koordinat profil Airfoil yang diimplementasikan kedalam bahasa pemograman Visual Basic. Hasil pemodelan matematik di input ke dalam software Auto CAD untuk mendapatkan desain cetakan propeller blade. Desain tersebut di input ke dalam software Master CAM untuk dilakukan simulasi proses pemesinan pembuatan cetakan propeller blade. Dari hasil simulas didapat 7084 jumlah nomor program NC (Numerical Control)
Co-Authors Abdi Hanra Sebayang Alfi Tranggono Agus Salim Andi Supriadi Chan, Andi Supriadi Angga Bahri Pratama Anugreni, Fera Arie Sucipto Arridina Susan Silitonga - Asmaidi Balkhaya, Balkhaya Benu, Siti Maretia Billy Christian Manurung Boangmanalu, Eka Putra Dairi Destiadi, Rezha Ekinola, Efri Debby Eko Darmawan Hadianti Muhdinar Pasaribu Hasibuan, Annalisa Sonaria Ibrahim, Husin Ihsan Izhary Siregar Khairul Rahmi Leonardo Manurung Mizanuddin Sitompul Nelson Manurung, Nelson Nofriadi Piktor Tarigan Pinem, M Ihsan Rezha Destiadi Sebayang, Adri Rakha Sera Delta Tanjung Siahaan, Enzo W.B Sihar Siahaan Sihar Siahaan Siregar, Munawar Alfansury Siti Maretia Benu Subhan,, Muhammad Ari Sufiyanto, Sufiyanto Sumartono Sumartono Sutikno Sutikno Thenny Daus Salamoni Yoga Ahdiat Fakhrudi