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All Journal Journal TEPAT: Teknologi Terapan untuk Pengabdian Masyarakat EPI International Journal of Engineering Jurnal Teknik Mesin Sinergi
Lukmanul Hakim Arma
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Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering Energy Engineering Mechanical Engineering Public Health

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Minimalisasi Penyebaran COVID 19 Pada Lingkungan Pesantren, Sekolah dan Puskesmas Melalui Bantuan Alat Wastafel Portabel Azwar Hayat; Andi Erwin E. Putra; Lukmanul Hakim Arma; Hairul Arsyad; Muhammad Syahid; Novriany Amaliyah; Gerard A. Duma; Asriadi Sakka
JURNAL TEPAT : Teknologi Terapan untuk Pengabdian Masyarakat Vol 3 No 2 (2020): Penguatan Aplikasi Teknologi untuk Masyarakat pada Masa Pandemi
Publisher : Faculty of Engineering UNHAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25042/jurnal_tepat.v3i2.139

Abstract

The level of the spread of covid-19 in Indonesia continues to increase, the number of people who have been confirmed positive for Covid-19 is 55,092 people with a death toll of 2,805. South Sulawesi is in the third rank of a province with a high level of spread with a positive confirmed number of Covid-19 of 4,995 people and a death toll of 164 people (data as of 29 June 2020). To reduce the high spread in South Sulawesi province, various preventive measures have been taken. One of the most effective preventive measures is to always wash your hands with soap. Soap has been shown to effectively damage the outer protein layer of Covid-19 and in the end can kill the virus. In this community service, the aim is to provide portable sink equipment assistance and at the same time to socialize the prevention of the spread of Covid-19 through banners at Islamic boarding schools, puskesmas and schools in the Gowa district area. This activity will be carried out as an effort to prevent the spread of Covid-19 in Islamic boarding schools, schools and health centers in entering the current “new normal” period.
Alat Penepung Umbi Porang di Kampung Bonti Kabupaten Pangkep Azwar Hayat; Onny Sutreasman; Ahmad Yusran Aminy; Andi Erwin E. Putra; Lukmanul Hakim Arma; Hairul Arsyad; Novriany Amaliyah; Gerard Antonini Durma; Asriadi Sakka
JURNAL TEPAT : Teknologi Terapan untuk Pengabdian Masyarakat Vol 4 No 2 (2021): Community Empowerment through Health Awareness in the New Normal
Publisher : Faculty of Engineering UNHAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25042/jurnal_tepat.v4i2.210

Abstract

Porang is a tuber plant with the Latin name Amorphophallus Muelleri. In some areas of South Sulawesi, this plant is known as Tire. Porang belong to the family Araceae, which is a type of tuber plant that is able to live in various types and soil conditions. Porang plants do not have to get direct sunlight so these plants are easy to find on the sidelines of forest plants, plantations or populated land. The main problem faced by the community of bonti village is that They cannot process porang into flour due to lack of flouring machine and does not have human resources that can operate machines / make flour porang. Based on this problems, We do a community service by applying science and technology in bonti village in the form of technology machines that can turn porang into flour. The flouring mechine used is an FFC-15 type with 3 filters driven by a YC90S-4 Single-phase electric motor of 0.75 kW 1 HP with a maximum rotation of 1400 rpm. The machine and electric motor are connected by a v-belt and pulley on both shafts. The result obtained is an increase in the ability to produce flour reaching 80-100kg per hour according to the level of dryness of people's chips. The economic impact felt by partners is the occurrence of savings in production when using electric motors. Per hour of operation of an electric motor only requires around Rp.1,500 which saves up to 80% compared to the use of gasoline or diesel engines.
Disain dan Pembuatan Alat Atomisasi Aluminium Edi Iskandar; Hafrizon Hafrizon; Wiwiek Nuralimah; Hairul Arsyad; Lukmanul Hakim Arma
Jurnal Teknik Mesin Sinergi Vol 18, No 2 (2020): Oktober 2020
Publisher : Politeknik Negeri Ujung Pandang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (745.881 KB) | DOI: 10.31963/sinergi.v18i2.2626

Abstract

Metal powder is the main raw material in the manufacture of powder metallurgy-based products. Powder-making is the initial step before the powder is packed and pressed in a mold to form the desired product. This research designs and fabricates an atomizer to produce powder from liquid aluminum using a pressurized water jet system. The research stage starts from the drawing of the tool design by considering the volume of liquid aluminum, the diameter of the outlet of liquid metal, the air pressure, and the angle of attack of the water beam. The second stage is the manufacture of the atomization chamber by referring to the design drawing by making parts of the tool/frame, liquid metal feeder parts, making the walls of metal plates, making the nozzle holder, and collecting the powder parts and the water exhaust channel. The third stage is assembly, which is to unite the main parts of the aluminum atomizer. The final stage is the testing of the atomization tool using 250 Psi pressurized water with variations of attack angle was 30˚, 35˚, 40˚, 45˚, and 50˚ with a metal descending channel diameter of 5 mm. The results showed that the 45o spray angle gave the highest percentage of powder amount and the lowest 40o angle resulted in the size of aluminum metal powder in the range 0.105 mm-0.5 mm. The size of the powder was obtained at an angle of attack of 35o, which is an average of 39.5 um, and the largest size of powder was obtained at a spray angle of 40o of 89.5 um. The resulting powder form is irregular in shape, flakes (flakes), spheroid (spherical), and spongy (hollow).
Analisis Karakteristik Kekakuan Beam dari Bahan Komposit Epoxy-Serat Bambu dengan Metode Elemen Hingga Hammada Abbas; Hairul Arsyad; Lukmanul Hakim Arma
Jurnal Teknik Mesin Sinergi Vol 7, No 2 (2009): Oktober 2009
Publisher : Politeknik Negeri Ujung Pandang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (81.297 KB) | DOI: 10.31963/sinergi.v7i2.1045

Abstract

Penelitian ini menyelidiki karakteristik komposit epoxy-serat bambu yang berkatian dengan sifat kekakuannya (modulus elastisitas komposit dengan pengujian tarik, pergeseran beam dalam arah sumbu Y pada berbagai titik dan dalam arah sumbu X sepanjang beam dengan menggunakan metode elemen hingga, penguatan yang ditimbulkan oleh serat bambu). Komposit ini memiliki ciri unisotropic. Serat bambu disusun dengan arah 0°, 30°, 45°, 60° dan 90° menjadi bentuk beam sepanjang 300 mm. Hasil penelitian menunjukkan kontribusi serat arah 30o paling besar dalam penguatan modulus elastisitas komposit sebesar 993 N/mm2 dan defleksi terkecil sebesar 4,55 mm.
Aplikasi Sel Surya untuk Penerangan Warga di Pulau Balang Caddi Kabupaten Pangkajene dan Kepulauan Azwar Hayat; Onny Sutreasman; Ahmad Yusran Aminy; Andi Erwin Eka Putra; Lukmanul Hakim Arma; Hairul Arsyad; Novriany Amaliyah; Gerard Antonini Duma; Asriadi Sakka; Rudi Rudi
JURNAL TEPAT : Teknologi Terapan untuk Pengabdian Masyarakat Vol 5 No 2 (2022): Mengembangkan Kehiodupan Masyarakat melalui Kesatuan dan Kekuatan
Publisher : Faculty of Engineering UNHAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25042/jurnal_tepat.v5i2.285

Abstract

Balang Caddi Island is one of the islands in the Pangkajene dan Kepulauan Regency where most of the people work as fishermen. Administratively the island is Mattiro Bintang Subdistrict, Liukang Tuppabiring District. The island is a remote area that often receives less attention. The electrical energy crisis experienced by the people of this island needs to address as soon as possible. With this community service, we are implementing new renewable energy solar cells for lighting residents on Balang Caddi Island. This Solar Cell application will be placed in one of the residents house as a pilot project for the application of new and renewable energy. The community will also receive training on how to maintain the tool so that the community will independently maintain the sustainability of the program in the future. A 100 wp Solar Cell with a 216 Wh battery is installed to power 2 pieces of 7 watt lamps, 2 pieces of 9 watt lamps, 30 watt fan and 50 watt TV. The lamp is operated at night for 6 hours with a total power consumption of 192 watts. Fans and TVs are operated during the daytime only by utilizing direct solar energy converted from the DC current of the solar cell to the AC current using a 300 watt inverter. On a daily basis, benefits are obtained in the form of free electricity of 300-400 watts per day to meet the needs of the residents of Balang Caddi island. This activity have succeeded in transforming the residents Balang Caddi island. This can be seen from the results of the Pre-test and Post-test which showed an increase in knowledge from really don't know 26.4% to very knowledgeable 83.3%, an increase in skills from really don't know 87.5% to very capable 94.6% and an increase in attitude from really don't know 20% to really know 100%.
Increased Hardness Value due to the Diffusion of Low-Temperature Carburizing Process ., Nitha; Sutresman, Onny S; Aminy, Ahmad Yusran; Arma, Lukmanul Hakim
EPI International Journal of Engineering Vol 6 No 1 (2023): Volume 6 Number 1, February 2023
Publisher : Center of Techonolgy (COT), Engineering Faculty, Hasanuddin University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25042/epi-ije.022023.03

Abstract

This research to determine the effect of the tensile load on the carburizing process and the heating temperature lower than the normal carburizing temperature on the hardness of carbon steel with a percentage of 80% buffalo bone charcoal and 20% BaCO3, 20 mesh grain size, 4 hours holding time, and slow cooling with a tensile load of 1/4σp 1/2σp 3/4σp, and σp (proportional stress). The heating temperatures below normal carburizing temperatures, namely 6000C, 6500C, 7000C, and 7500C while being pulled by 1/4σp, 1/2σp, 3/4σp, and σp. After reaching the heating temperature, the material is held in the furnace for 4 hours and cooled slowly. After the material is cold, mechanical testing is carried out with Vickers microhardness. Hardness value at a temperature of 6000C is 103.93 HRB, at a temperature of 6500C is 104.33 HRB, at a temperature of 7000C is 104.80 HRB, and at a temperature of 7500C is 106.60 HRB, while the process of pack carburizing without tensile at a heating temperature of 8000C is 105.2 HRB. This proves that the application of loads at lower heating temperatures during the heating process can exceed the hardness value without tensile loads at higher temperatures of 8000 C.
A Study of the Effect of Additional Magnesium (Mg) on Erosion-Corrosion Resistance and Bending Strength in Aluminum A383 Alloy Amiruddin, Arya Ahmad; Arma, Lukmanul Hakim; Arsyad, Hairul
EPI International Journal of Engineering Vol 6 No 1 (2023): Volume 6 Number 1, February 2023
Publisher : Center of Techonolgy (COT), Engineering Faculty, Hasanuddin University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25042/epi-ije.022023.01

Abstract

In this study, evaluating the erosion-corrosion resistance and mechanical properties, especially the bending strength of aluminum alloy A383 with the addition of 4%, 6%, and 9% magnesium was investigated with variations in velocity (45l/h, 60l/h, and 75l/h). and angle variations (30º, 40º, and 50º) using 12% sodium hypochlorite solution. The test equipment used is an injection diaphragm pump in the recirculation system for 4 hours per sample. The results showed that the erosion-corrosion resistance of A383 alloy is proportional with the increase of magnesium addition to the alloy maximum weight loss occurs at an impact angle of 30° with a velocity of 75 l/h. The degradation decreased slightly with increasing the impact angle and decreasing velocity. Analysis of the erosion-corrosion mechanism shows that the corrosion process dominates material damage rather than erosion. The results of the bending test showed that the highest strength was A383 9% Mg which was 366.09 MPa, and the lowest bending strength was A383 material without magnesium addition which was 261.80 MPa. From these results, it can be concluded that the addition of magnesium (Mg) to aluminum alloy A383 contributes to increased corrosion resistance and increased bending strength.
The Effect of Hot Pressing on the Mechanical Properties of Metal Composites (AI/Sic) Result from Metallurgical Processes with Heating Temperature Variations in Bushing Making ., Mangambari; Arma, Lukmanul Hakim; Syahid, Muhammad
EPI International Journal of Engineering Vol 6 No 1 (2023): Volume 6 Number 1, February 2023
Publisher : Center of Techonolgy (COT), Engineering Faculty, Hasanuddin University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25042/epi-ije.022023.04

Abstract

The manufacture of Al/SiC alloy matrix composites has been widely carried out by researchers through powder metallurgy techniques. Bushings are slit cylindrical type bearings that serve to support the shaft. Bushings can be made by powder metallurgy, to get the perfect compaction process, compaction can be done by high temperature or Hot Pressing. A hot press will make the powder softer/plastic, making it easier during the perfect compaction process. For this reason, heating must be controlled in order to obtain a homogeneous product. Al/SiC metal matrix composites are alloyed materials of different types of materials, as matrices in this case are aluminum and as reinforcement are SiC particles (ceramics) made by powder metallurgy techniques. In this study, the Al/SiC composite composed of 70% Al - 30% SiC and Hot Pressing temperature variations of 100, 150 and 200°C with a pressure of 5000 kg and a holding time of 10 minutes. In the sintering process, the temperature used is 450, 500 and 550°C with a holding time of 2 hours. The results of this study show, in hardness testing it is known that the value of bushing hardness increases as the temperature of Hot Pressing increases.
Effect of Temperature Variation PWHT Dissimilar Welding Low Carbon Steel ASTM A36 with ASTM A240 Type 316L Wahab, Abd.; Arma, Lukmanul Hakim; Arsyad, Hairul; Othman, Rozaini Bin
EPI International Journal of Engineering Vol 7 No 1 (2024): Volume 7 Number 1, February 2024
Publisher : Center of Techonolgy (COT), Engineering Faculty, Hasanuddin University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25042/epi-ije.022024.05

Abstract

Abstract ASTM A36 low carbon steel is steel commonly used in construction, and the austenitic stainless steel 316L series is stainless steel with good corrosion resistance. Joining two dissimilar metals is unavoidable because it can provide good mechanical properties and resist corrosion at a low cost. This study studied the effect of variations in post-welding heating process temperature (PWHT) on mechanical properties and microstructure by shield metal arc welding (SMAW) low carbon steel ASTM A36 with ASTM A240 type 316L with a thickness of 6 mm with a single V connection and using an E308L-electrode. 16. The PWHT process was carried out to improve the weld results with variations in heating temperatures of 400, 600, and 900˚C with a holding time of 1 hour with 15% dromos quenching media. Testing mechanical properties includes hardness test using micro Vickers method on low carbon steel base metal, HAZ, weld metal, HAZ, and stainless steel base metal and impact test using Charpy method. Optical microscopes were used to study the microstructure of the area of the base metal, HAZ, and weld metal viewed using a laser scanning microscope. The test results show that the highest average hardness value in the weld metal area is in the specimen without PWHT with a value of 124.96 HV and samples with a PWHT temperature of 400˚C on the weld metal 121.63 HV and the lowest in the PWHT specimen 900˚C 76.17 HV. in the HAZ 316L area. The hardness value of the weld metal without PWHT and PWHT indicates that the hardness value is higher than the two-parent metals. While the impact test with PWHT specimens at 400˚C had higher impact energy than specimens without PWHT by 6.50 %, and the lowest was 16.26% at the optimum temperature of 900˚C, the shape of the samples showed ductile cracks.
Socialization of Implementation of Automatic Identification System (AIS) Technology on Passenger and Fishing Boats to Enhance Maritime Safety and Security on Lae-Lae Island ., Rahimuddin; Renreng, Ilyas; Baso, Suandar; Putra, Erwin Eka; Arma, Lukmanul Hakim; ., Hamzah
JURNAL TEPAT : Teknologi Terapan untuk Pengabdian Masyarakat Vol 8 No 1 (2025): Community Empowerment through Higher Education Community Service Programs
Publisher : Faculty of Engineering UNHAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25042/jurnal_tepat.v8i1.541

Abstract

The density of ships in the Makassar harbor shipping channel increases along with the increase in the number of ships entering and leaving the port and ships passing through the shipping channel, including traditional passenger ships and fishermen from the surrounding islands. This situation can increase the risk of a ship collision. Traditional passengers and fishing boats have the potential to collide because their boats are not detected by other ships. This situation can occur because they do not have a device that can exchange ship position information, namely, the Automatic Identification System (AIS). The use of an AIS is an alternative solution that can be detected by large ships and provides ship navigation actions to avoid collisions. The socialization of AIS technology and its application to the operators, owners of traditional passenger ships and fishermen is the first step in introducing AIS technology for sailing safety. The activity, which consisted of lectures and Q&A sessions, was used in partnership with the local administration and was attended by 15 people. The activity was assessed by asking the same six questions before and following the presentation. Five participants (33%) were selected for assessment. The initial evaluation revealed that none (0% of participants) were familiar with AIS devices that could supplement radar function. In the final review, 83% of the accumulated responses were correct, up from 25% previously; 17% did not comprehend how AIS works. This activity improves participants' grasp of the importance of utilizing AIS, how it works, and the necessity for sample devices to aid further comprehension.
Co-Authors ., Mangambari ., Rahimuddin Ahmad Yusran Aminy Amiruddin, Arya Ahmad Amme, Rudi Andi Erwin E. Putra Andi Erwin Eka Putra Asriadi Sakka Azwar Hayat Edi Iskandar Gerard A. Duma Gerard Antonini Duma Gerard Antonini Durma Hafrizon Hafrizon Hairul Arsyad Hammada Abbas Hamzah . Hayat, Azwar Ilyas Renreng Mochtar, Andi Amijoyo Muhammad Syahid Nasaruddin Salam, Nasaruddin Nitha Nitha Novriany Amaliyah Onny Sutreasman Othman, Rozaini Bin Putra, Erwin Eka Rudi Rudi Rustan Tarakka Sakka, Asriadi Suandar Baso Sutresman, Onny S Wahab, Abd. Wiwiek Nuralimah