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All Journal Jurnal Forum Nuklir Jurnal Sains Materi Indonesia JIPFRI (Jurnal Inovasi Pendidikan Fisika dan Riset Ilmiah) Jurnal Pendidikan Fisika dan Keilmuan (JPFK) Jurdimas (Jurnal Pengabdian Kepada Masyarakat) Royal Journal of Renewable Energy and Mechanics ARMATUR : Artikel Teknik Mesin dan Manufaktur Journal of Engineering Science and Technology
Ahmadi, Haerul
Universitas Negeri Gorontalo
Aerospace Engineering Astronomy Automotive Engineering Education Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Physics Social Sciences

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Aplikasi Interdigital Capacitor Sensor (IDCS) dalam pengukuran permitivitas relatif Crude Oil Rachmanita, Risse Entikaria; Ahmadi, Haerul
Jurnal Pendidikan Fisika dan Keilmuan (JPFK) Vol 5, No 2 (2019)
Publisher : UNIVERISTAS PGRI MADIUN

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25273/jpfk.v5i2.4011

Abstract

Interdigital Capacitor Sensor (IDCS) telah diaplikasikan dalam berbagai bidang, terutama pada bidang kimia dan biologi. Penelitian ini bertujuan untuk melakukan  pengukuran permitivitas relatif pada crude oil dengan mengaplikasikan IDCS sebagai media sensing. Permitivitas relatif sangat dibutuhkan untuk mendapatkan sifat kelistrikan, yang metodenya masih jarang didapatkan pada special liquid seperti pada crude oil. IDCS dapat dimanfaatkan untuk aplikasi pada pengukuran microlevel crude oil. IDCS dicetak pada printed circuit board (PCB) dengan konfigurasi dua pola sisir elektroda. Sensor yang telah dibuat memiliki 5 elektroda di setiap sisinya, panjang elektroda adalah 40 mm, lebar elektroda adalah 4 mm, tebal elektroda adalah 0,01 mm, dan jarak antar elektroda adalah 5 mm. Kalibrasi IDCS menggunakan RCL meter tipe PM 6303A Philip frekuensi 1 kHz. Pengujian sensor dilakukan dengan pengukuran kapasitansi IDCS sendiri dan pengukuran kapasitansi  aquades. Selanjutnya, dilakukan pengukuran kapasitansi crude oil menggunakan IDCS yang telah dikalibrasi. Hasil pengukuran diperoleh nilai rata-rata kapasitansi IDCS (tembaga), air murni, dan crude oil berturut-turut adalah (22,7 ± 0,6) pF, (1,12 ± 0,05) nF, dan (25,6 ± 0,6) pF. Hasil perhitungan dari data kapasitansi diperoleh permitivitas relatif IDCS (tembaga), air murni, dan crude oil berturut-turut adalah 17,2 ± 0,4, 71,89 ± 1,67, dan 2,4 ± 0,2. Nilai kapasitansi bahan uji berbanding lurus dengan nilai permitivitas relatifnya.
Perancangan Perancangan Sistem Pengukuran Kapasitansi Crude Oil Menggunakan Interdigital Capasitors (IDCs) Berbasis Arduino Uno Risse Entikaria Rachmanita; Haerul Ahmadi
JIPFRI (Jurnal Inovasi Pendidikan Fisika dan Riset Ilmiah) Vol 3 No 2 (2019): JIPFRI (Jurnal Inovasi Pendidikan Fisika dan Riset Ilmiah) - November 2019
Publisher : Program Studi Pendidikan Fisika STKIP Nurul Huda

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (343.136 KB) | DOI: 10.30599/jipfri.v3i2.471

Abstract

Arduino UNO R3 is one of the cheapest and easiest microcontroller boards that has great potential to be used as a basis for the measurement system. This study aims to develop measurement system of crude oil capacitance by using IDCs(Interdigital Capacitors). By knowing the value of crude oil capacitance, the crude oil permittivity value can be calculated. The crude oil permittivity value data is extremely needed in making crude oil heating systems using microwaves. The study used IDC sprinted on a PCB board with a copper layer as the electrode. Then, the system measurement results were compared with the results of PM 6303 RCL meter Phillip type A frequency measurement of 1 kHz which was used as reference data to determine the extent of measurement errors. From the results obtained, it is known that the error value of the Arduino UNO R3 based capacitance repeatability measurement is 0.47%. While the results of the linearity test measurement of crude oil capacitance measurement of temperature increases using the Arduino Uno-based IDCs sensor, the R2 value is 0.87. Thus it can be seen that the Arduino UNO R3-based capacitance measuring device has quite good sensor characteristics.
IDENTIFICATION OF INCOMPLETE PENETRATION WELDING DEFECTS ON DIGITAL RADIOGRAPHIC FILM FIGURES WITH THE GEOMETRIC INVARIANT MOMENT Agus Probo Sutejo; Haerul Ahmadi; Tasih Mulyono
Jurnal Forum Nuklir JURNAL FORUM NUKLIR VOL 15 NO 2 NOVEMBER 2021
Publisher : BATAN

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17146/jfn.2021.15.2.6283

Abstract

The examination of defects in radiographic films necessitates specialized knowledge, as indicated by an expert radiographer (AR) degree, yet the subjectivity of AR in identifying defects is problematic. To overcome this subjectivity, automatic welding defect identification is needed. This is executed by using Matlab to create artificial neural networks, which is beneficial for users with the graphical user interface (GUI) feature. One of the breakthroughs in figure extraction into seven feature vector values is the geometric invariant moment theory. This prevents translation, rotation, and scaling from changing the figure's characteristics. Therefore, a welding defect identification system with a geometric invariant moment was created in the digital radiographic film figure to overcome the reading error by AR. The identification system obtained an accuracy rating of 89.9%
Study of Microstructural and Corrosion Properties of Aluminium Alloy 7075 after Plasma Nitriding Haerul Ahmadi; Rizky Abdul Aziz; Suprapto Suprapto; Tjipto Sujitno; Sophie Hapsari
Jurnal Sains Materi Indonesia Vol 21, No 1: OCTOBER 2019
Publisher : Center for Science & Technology of Advanced Materials - National Nuclear Energy Agency

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (758.372 KB) | DOI: 10.17146/jsmi.2019.21.1.5649

Abstract

Plasma nitriding is a treatment process of metals by depositing nitrogen into metal that considered to be nitrided by mean of increasing the mechanical, physical, and chemical properties of the metal. This treatment will form a hard layer compund of Al-N on the surface of the sample. In this study, aluminium alloy 7075 was nitrided which the application of it to structural part of aircraft makes it vulnarable to not only corrosion and wear attack but also decreasing the hardness of the material. One method to overcome these issues is plasma nitriding. The purpose of of this research is to do the characterizations of plasma nitrided aluminium alloy 7075 regarding its microstructure, mechanical, and chemical properties. The characterizations that had been done were microhardness Vickers testing, SEM-EDX, and electrochemical corrosion testing Potensiostat. The hardness of the sample increased 55% from 75,88 VHN (raw material) to 117,68 VHN (at optimum parameter). The depth of the white layer of plasma nitriding is approximately 6 µm, while the EDX result reported carbon, oxygen, and nitrogen presence. Corrosion testing showed that the highest corrosion rate is on the raw material, 0,15393 mpy. While the optimum one is 0,07184 mpy.
Experimental Study of the Effect of Addition Glass Wool as Insulation Material on the Performance of Flat Plate Type Solar Collectors Risse Entikaria Rachmanita; Moh. Yusuf Syafi'i; Haerul Ahmadi
Journal of Renewable Energy and Mechanics Vol. 5 No. 02 (2022): REM VOL 5 NO 02 2022
Publisher : UIR PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (390.016 KB) | DOI: 10.25299/rem.2022.vol5.no02.9982

Abstract

Clean energy sources are becoming more and more common, and the use of solar thermal energy is also increasing. Indonesia gets sunlight all year round with a radiation radiation of 4.80 kWh/m2. The potential of solar energy can be utilized by converting solar radiation into new energy. The flat plate solar water collector is a simple solar energy conversion system for hot water production. This study aims to determine the amount of heat energy received by the solar collector, determine the temperature of the water that comes out (Tout) on the solar collector and determine the thermal efficiency (η) on the flat plate solar collector with the addition of glass wool as an insulation material. The results showed that the highest thermal energy that enters the solar collector is 832.58 W and produces an output water temperature of 320.7 K or 47.7 °C. The efficiency that can be achieved by the solar collector is quite efficient, which is 47.92%.
Development of welding discontinuity identification system using statistical texture feature extraction and ANN classification on digital radiographic image Haerul Ahmadi; Dandi Arifian; Tasih Mulyono; Bangun Pribadi; Risse Entikaria Rachmanita
ARMATUR : Artikel Teknik Mesin & Manufaktur Vol 4 No 1 (2023): Jurnal Armatur
Publisher : Universitas Muhammadiyah Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24127/armatur.v4i1.3330

Abstract

Discontinuity in welds is one of the causes of the quality of a connection in the material decreases function. Undamaged test with radiographic method is one of the tests to see the quality of a weld. The test results are radiograph images and evaluated by a radiographer. So this research is designed by optimizing a system to help the work of a radiography expert in identifying discontinuities by utilizing the Matlab Application. On this system uses the method of characteristic extraction and classification of neural networks (AAN). The system uses a characteristic extraction method with geometric invariant moment (GIM) algorithms and a gray level co-occurenece matrix (GLCM) as identification values used in the classification process. The calcification process uses a backpropagation-type multilayer Artificial Neural Network. The types of discontinuities used as data in this system are incompleted of penetration, crack, wormhole, and distributed porosity using a total of 800 datasets of radiograph imagery data. This data sharing is organized using k fold cross validation. The study conducted 15 experiments in system testing to prove the truth in identifying. The results of the experiment resulted in the highest average performance score reaching 93.33%
Studi Simulasi Optimasi Parameter Proses Implantasi ION Nitrogen Multi Energi ke Dalam Permukaan SS 316L Menggunakan Program SRIM Haerul Ahmadi; B. A. Tjipto Sujitno; Yudithia Balo Tarigas; Andi Rosman N.
Journal of Engineering Science and Technology Vol. 1 No. 1 (2023): January
Publisher : Indonesian Journal Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47134/jesty.v1i1.4

Abstract

Nitrogen ion implantation at 50 keV of energy on the surface of SS 316 stainless steel, by calculation will only be able to reach a depth of 561 Å and the ions will be distributed Gaussian effectively at a depth of 561 Å ± 339 Å, so that from the surface to a depth of 222 Å is not filled by ions (empty) which of course will affect the properties of the implanted surface. The solution to the problem is to implant the target several times at <50 keV of energy. To minimize the un-filled volume, the study of simulation and calculation has been conducted. In this study a simulation using TRIM program to know how many times the target should be implanted at different energies and also the calculation of the amount of nitrogen ions that should be implanted, so that the distribution of nitrogen ions can be evenly distributed from the surface to 561 Å. From the results of simulations and calculations the results show that the target must be implanted at least 6 times implantation at energy 50 keV,40 keV, 30 keV, 20 keV and 10 keV. Under these conditions the dose that must be implanted are 7,4×1017ion/cm2, 6,44×1017ion/cm2, 4,6×1017 ion/cm2, 3×1017 ion/cm2 and 1,6×1017 ion/cm2. The total doses and amount of nitrogen filling the implanted volume are 7,32%..
Pelatihan Manajemen Layanan Terintegrasi, Pemanfaatan Dan Pemasaran Produk Kerajinan Dari Sampah Plastik Idawati Supu; Haerul Ahmadi; Muh. Fachrul Latief
Jurdimas (Jurnal Pengabdian Kepada Masyarakat) Royal Vol 6, No 2 (2023): April 2023
Publisher : STMIK Royal

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33330/jurdimas.v6i2.2016

Abstract

Abstract: Garbage is one of the global problems that requires serious which one had to be handled  today,  because it caused environmental and healthy problems. One of the most dominant types in society was plastic waste. The purpose of this activity is to conduct socialization, counseling and direct discussion to the community and the dasawisma group to maintain environmental health and cleanliness, provide training on waste selection techniques, and digital-based integrated management such as "Waste Bank", provide hands-on training on plastic waste processing techniques to produce fuel. oil, empowering community groups in making handicrafts from plastic waste that has economic value, providing training in marketing digital-based handicraft products. This activity uses a direct practice method in the Lopo Village community, involving community groups as activity participants. The creations of this activity have made handicraft products from plastic waste in the form of chairs, tables, flower vases, flowers and tissue holders. In addition, an integrated WhatsApp group was formed in waste management. There was also a prototype of a simple tool for producing fuel oil (BBM). Village officials and the community were very enthusiastic during the implementation of the activity and have collaborated with activity organizers in the development of a fuel-producing destillator.            Keywords: crafts; garbage; integrated management; marketing plastic   Abstrak: Sampah merupakan salah satu masalah global yang memerlukan penanganan serius saat ini karena menyebabkan masalah lingkungan dan kesehatan.  Salah satu jenis sampah yang sangat mendominasi di masayrakat adalah sampah plastik. Tujuan kegiatan ini adalah  melakukan sosialisasi, penyuluhan dan diskusi langsung ke masyarakat dan kelompok dasawisma menjaga kesehatan dan kebersihan lingkungan, memberikan pelatihan teknik pemilihan sampah, dan manajemen terintegrasi berbasis digital sejenis “Bank Sampah”, memberikan pelatihan langsung teknik pengolahan sampah plastik untuk menghasilkan bahan bakar minyak, memberdayakan kelompok masyarakat dalam membuat kerajinan tangan dari sampah plastik yang bernilai ekonomi, memberikan pelatihan dalam memasarkan produk kerajinan berbasis digital. Kegiatan ini menggunakan metode praktek langsung di masayarakat Desa Lopo, dengan melibatkan kelompok masayarakat sebagai peserta kegiatan. Hasil kreasi dari kegiatan ini telah dibuat produk kerajinan dari sampah plastik berupa tempat kursi, meja, vas bunga, bunga dan tempat tissue. Selain itu, terbentuk grup WhatsApp terintegrasi dalam manajemen sampah.juga prototipe alat sederhana alat penghasil Bahan Bakar Minyak (BBM). Perangkat Desa dan masayarakat sangat antusias selama pelaksanaan kegiatan dan telah melakukan kerjasama dengan penyelenggara kegiatan dalam pengembangan destillator penghasil bahan bakar. Kata kunci: kerajinan; manajemen terintegrasi; pemasaran; plastik; sampah
Co-Authors Agus Probo Sutejo Andi Rosman N B. A. Tjipto Sujitno Bangun Pribadi Dandi Arifian Moh. Yusuf Syafi'i Muh Fachrul Latief Rachmanita, Risse Entikaria Risse Entikaria Rachmanita Rizky Abdul Aziz Sophie Hapsari Suprapto Suprapto Supu Idawati Tasih Mulyono Tasih Mulyono Tjipto Sujitno Yudithia Balo Tarigas