Article Per Year (5 Year)
p-Index From 2020 - 2025
1.431
P-Index
This Author published in this journals
All Journal Journal of Mechanical Science and Engineering Jurnal Rekayasa Mesin Jurnal Pendidikan dan Pembelajaran Khatulistiwa (JPPK) AUSTENIT Jurnal Teknik Kimia Abdi Dosen : Jurnal Pengabdian Pada Masyarakat Prima Abdika: Jurnal Pengabdian Masyarakat Indonesian Journal of Engineering and Science (IJES) Journal of Engineering Science and Technology Applications
Qomarul Hadi
Fakultas Teknik Mesin. Universitas Sriwijaya.
Religion Aerospace Engineering Arts Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Chemistry Control & Systems Engineering Decision Sciences, Operations Research & Management Education Energy Engineering Environmental Science Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Mathematics Mechanical Engineering Public Health Social Sciences Other

Published : 11 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 11 Documents
Search

 1   2 
PENGARUH LEMPAR TANGKAP BOLA TERHADAP CHEST PASS BOLA BASKET DI SMP NEGERI 19 PONTIANAK Hadi, Qomarul; Yunitaningrum, Wiwik; Purnomo, Edi
Jurnal Pendidikan dan Pembelajaran Khatulistiwa Vol 4, No 5 (2015): Mei 2015
Publisher : Jurnal Pendidikan dan Pembelajaran Khatulistiwa

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

Abstract

Abstrak: Tujuan penelitian ini adalah untuk mengetahui pengaruh permainan lempar tangkap bola terhadap chest pass basket basket pada siswa kelas VII C SMP Negeri 19 Pontianak. Metode penelitian yang digunakan adalah metode eksperimen dengan bentuk pre-experimental design. Populasi dalam penelitian ini mengambil  seluruh siswa kelas VII SMPN 19 Pontianak yang berjumlah 175 orang. Sampel dalam penelitian ini menggunakan teknik purposive sampling, yang berjumlah 39 siswa. Analisis data dilakukan dengan menggunakan analisis uji-t. Hasil penelitian yang didapatkan yaitu terjadi peningkatan rata-rata hasil chest pass dada bola basket yaitu peningkatan sebesar 2,41 (rata-rata pretest 15,44 dan rata-rata posttest 17,85) dengan persentase peningkatan sebesar 15,61%. Berdasarkan analisis uji pengaruh didapat nilai thitung>ttabel= 16,197>2,024, artinya terdapat pengaruh permainan lempar tangkap bola terhadap chest pass basket pada siswa kelas VII C di SMPN 19 Pontianak. Kata Kunci: Permainan Lempar Tangkap, Chest Pass Bola Basket.   Abstract: The purpose of this study was to determine the effect of catching a ball toss game on learning outcomes passing the chest (chest pass) basketball in class VII C SMP Negeri 19 Pontianak. The method used is an experimental method to form a pre-experimental design. The population in this study took the entire seventh grade students of SMP 19 Pontianak, amounting to 175 people. The sample in this study using purposive sampling technique, which amounts to 39 students. Data analysis was performed using t-test analysis. The results of the study found that an increase in the average results of students passing the chest that is an increase of 2.41 (average of 15.44 pretest and posttest average of 17.85) with a percentage increase of 15.61%. Based on the analysis of the effect of test obtained tcount> table = 16.197> 2.024, meaning that there are significant catch a ball toss game on learning outcomes chest passing a basketball in grade VII C in SMP 19 Pontianak.Keywords: Throw Game Capture, Chest Pass Basketball
Peningkatan ketangguhan dan ketahanan fatik siklus rendah pada baja ASSAB 709 M melalui proses annealing Helmy Alian; Nukman Nukman; M. Badaruddin; Agung Mataram; Qomarul Hadi
Jurnal Teknik Kimia Vol 27 No 3 (2021): Jurnal Teknik Kimia
Publisher : Chemical Engineering Department, Faculty of Engineering, Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36706/jtk.v27i3.813

Abstract

Baja yang diaplikasi pada komponen-komponen mesin karena mengalami kondisi kerja yang berat dan adanya beban siklik yang lama harus memiliki kekuatan tinggi dan daktilitas yang tinggi. Penelitian ini, baja ASSAB 709 M diberi perlakuan panas annealing untuk memperbaiki sifat mekanik, perilaku fatik siklus rendah dan ketangguhan baja tersebut. Proses annealing dengan memanaskan spesimen di dalam furnace sampai temperatur austenisasi 825 °C, dengan waktu tahan 30 menit kemudian didinginkan perlahan sampai temperatur kamar . Sebelum dan sesudah proses annealing, dilakukan uji tarik, uji fatik siklus rendah (low cycle fatigue) dengan memvariasikan amplitude 0,0035 - 0,0110, impak, struktur mikro menggunakan optical microscopy(OM) dan permukaan fraktur dari spesimen dianalisis dengan menggunakan scanning electron microscopy (SEM). Struktur mikro baja ASSAB 709 M mengalami perubahan setelah annealing, dari banyaknya martensite lath menjadi terbentuknya pearlite and ferrite.. Perubahan mikrostruktur tersebut menyebabkan perubahan perilaku pada amplitudo regangan rendah dan tinggi akibat proses annealing. Peningkatan tegangan tekan dan peningkatan ketahanan kelelahan siklus rendah (low cycle fatigue) dari baja yang di annealing tergantung pada amplitudo regangan yang diterapkan.
Analisa Sifat Mekanik pada Komposit 86 Al 1020 – 12 Fly Ash – 2 Mg yang Dibuat dengan Proses Direct Melt Oxidation (DIMOX) Qomarul Hadi; Ahmad Sumadi
Jurnal Rekayasa Mesin Vol. 21 No. 1 (2021): Jurnal Rekayasa Mesin
Publisher : Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36706/jrm.v21i1.76

Abstract

This study aims to analyze the mechanical properties of composite with a composition of 86% aluminum 1020, 12% fly ash and 2% magnesium, the three composite materials are combined in a furnace with the Direct Melt Oxidation method, after the melting process with a temperature of 900oC and the holding time varying 4 hours , 5 hours and 6 hours. Later, the Brinell hardness tester, at K4 the average value of BHN was 49.00816 kgf / mm, K5 the average value of BHN was 51.80066 kgf / mm and K6 the average value of BHN was 56.64983 kgf / mm. In the observation of Scaning Electron Microscope K6 specimens that have the best pores, changes in the microstructure of these composites are increasingly visible on the 5000x magnification observation. This is due to the holding time which helps the infiltration process in the interface reaction between the liquid and solid phases, and the user of this holding time is due to the metal's wetting ability and the slow and time-consuming infiltration process. to get a more even mixture.
Analisis Aliran Udara Alat Penghemat Energi Vertikal Generasi Kedua untuk Masyarakat Tebing Gerinting Kecamatan Indralaya Selatan Kabupaten Ogan Ilir darmawi darmawi; Qomarul Hadi; Ellyanie; Irwin Bizzy
Jurnal Rekayasa Mesin Vol. 21 No. 2 (2021): Jurnal Rekayasa Mesin
Publisher : Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36706/jrm.v21i2.156

Abstract

Alat Penghemat Energi Vertikal which is the patent rights of Sriwijaya University  with identity number of IDP 000065109 is already developed in order to raised up the efficiency and the effectivity as energy saver and as heat and exhaust gas eliminator to prevent the users for health and comfortable matters. This product is now called Alat Penghemat Energi Vertikal Generasi Kedua (APEV-2). Among the improvements are the legs of APEV-2 is now made of steel, the base flat is also made of steel. The front air  window area is decreased and the  rack window binder and air hole at the bottom of the APEV-2.
New Performance with Matrix Composites of Used Plastic, Fiber of Red Pinang Sheath and Bamboo Nukman Nukman; qomarul hadi; Fusito Fusito
Journal of Mechanical Science and Engineering Vol 1, No 1 (2013): Journal of Mechanical Science and Engineering
Publisher : Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (391.592 KB)

Abstract

Ringkasan Pemanfaatan plastik bekas menjadi komposit, khususnya berbahan plyproplene (PP) telah dapat dilakukan dengan cara menambahkan serat Bambu dan Pelepah Pinang Merah. Matriks PP dipanaskan dalam satu alat pemanas untuk dicairkan kemudian ditambahkan masing-masing serat alam bambu dan juga pinang merah. Hasil pengujian sifat mekanik telah dibandingkan matriks tanpa penambahan serat dengan matriks yang berserat. Pengujian menujukkan bahwa sifat mekanik dari kompisit telah meningkat dengan penambahan serat alami. Kekuatan mekanik dengan penambahan serat bambu lebih besar daripada penambahan dengan serat Pinang Merah. Kata Kunci: Polyproplene, serat Bambu, serat Pinang Merah, Komposit, Kekuatan Mekanik. Utilization of scrap plastic to composite, especially made ​​plyproplene (PP) has to be done by adding fibers and sheaths Pinang Red Bamboo. PP matrix is heated in the heater melted then added to each of the natural bamboo fiber and red nut. Mechanical properties of the test results have been compared with the fiber-matrix without the addition of a fibrous matrix. Tests showed that the mechanical properties of kompisit has increased with the addition of natural fibers. Mechanical strength with the addition of bamboo fiber is greater than the addition of the Red Pinang fiber. Keywords : polyproplene, Bamboo fiber, fiber Pinang Merah, Composite, Mechanical Strength.
WEAR RESISTANT OF CACO3/FLY-ASH CERAMIC MATRIX COMPOSITE Hadi, Qomarul; Hardiyanto, Dwiki
Indonesian Journal of Engineering and Science Vol. 5 No. 1 (2024): Table of Contents
Publisher : Asosiasi Peneliti Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51630/ijes.v5i1.103

Abstract

This study aimed to investigate the potential of utilising fly ash, a harmful byproduct of coal waste, in the manufacturing of composite materials to reduce its environmental impact. Calcium carbonate (CaCO3) and fly ash were mixed with zinc stearate using the powder metallurgy method to create wear-resistant samples. The compaction load was adjusted to achieve optimal low-pressure compaction, with pressures of 22.75 MPa, 23.45 MPa, 24.14 MPa, and 24.83 MPa used for single punch pressing. After 10 minutes of holding time, sintering was conducted at 900 OC for 1 hour. The raw materials were tested using X-ray diffraction (XRD) and sieved based on the mesh size. The composite was characterised through various tests, including density testing, wear testing, and scanning electron microscopy (SEM) to observe the microstructure. The density value increased with the compaction load, with a maximum apparent density of 1.794 g/cm3 and the highest porosity percentage at a pressure of 22.75 Mpa of 31.155%. Furthermore, the specific wear value decreased as the compaction load increased, with the lowest specific abrasion value of 1.17 x 10-6 mm2/kg. Therefore, using fly ash to produce composite materials is a promising solution to reduce the negative impact of coal waste while producing wear-resistant materials.
TEMPERATURE-DEPENDENT CORROSION OF AISI 1020, AL 1050, AND RIVETED JOINTS IN LANDFILL LEACHATE Gunawan, Gunawan; Hadi, Qomarul; Ramadhani, Muhammad Iqbal
Indonesian Journal of Engineering and Science Vol. 6 No. 2 (2025): Table of Contents
Publisher : Asosiasi Peneliti Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51630/ijes.v6i2.102

Abstract

Corrosion is a critical degradation mechanism for metallic materials operating in aggressive environments such as landfills, where chloride-rich leachate, high moisture, and fluctuating temperatures accelerate electrochemical reactions. This study investigates the corrosion behavior of AISI 1020 carbon steel, Al 1050 aluminium, and their riveted joints under simulated landfill conditions at 30 °C, 40 °C, and 50 °C using the weight-loss method in accordance with ASTM G31-72. The landfill leachate used in this research contained high chloride, BOD, and COD levels, representing a chemically and biologically aggressive medium. Results show that AISI 1020 and Al 1050 experienced the highest corrosion rate at the early immersion stage (day 2), followed by passivation and a significant rate reduction by days 4 and 6. Increasing temperature accelerated initial corrosion for all materials, with Al 1050 showing greater susceptibility due to chloride-induced breakdown of its passive film. Riveted joints displayed much higher and less stable corrosion rates than single-material specimens, especially at elevated temperatures. Galvanic coupling between steel and aluminium, combined with crevice geometry at the rivet interface, intensified localized attack and disrupted protective oxide films. The most severe corrosion occurred in Al 1050 with riveted joints at 50 °C, reaching 0.523 mm/year on day 2. These findings highlight the combined roles of galvanic and crevice corrosion in riveted assemblies under landfill conditions and emphasize the need for careful material selection and joint design in waste management systems.
Pengaruh Arus Pengelasan Smaw pada Dissimilar Logam Stainless Steel 201 dan Baja 1040 Terhadap Sifat Mekanik dan Struktur Mikro: The Effect of Smaw Welding Current on The Mechanical Properties and Microstructure of Dissimilar Metals Stainless Steel 201 and Aisi 1040 Steel Hadi, Qomarul; Matondang, Ifsya Ussalam; Zamheri, Ahamad
Journal of Engineering Science and Technology Applications Vol. 3 No. 2 (2025): Journal of Engineering Science and Technology Applications
Publisher : CV Insight Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58227/jesta.v3i2.237

Abstract

The advancement of welding technology plays a crucial role in industrial development, especially in dissimilar metal welding, such as joining stainless steel 201 and carbon steel 1040. This type of welding often results in reduced mechanical properties at the joint due to differences in composition and physical characteristics. This study aims to investigate the effect of welding current variations on the tensile strength, hardness, and microstructure of dissimilar metal joints between stainless steel 201 and AISI 1040 steel. The welding method used is Shielded Metal Arc Welding (SMAW) with current settings of 85A, 90A, 95A, and 100A. Tests performed include tensile testing (ASTM E8M), hardness testing (JIS B 7725), composition analysis, and metallographic examination (ASTM E407-07). The results show that 95A is the most optimal current, producing the highest tensile strength and hardness values, particularly in the Heat Affected Zone (HAZ). Lower currents (85A and 90A) lead to insufficient penetration and fusion, a current of 100A generates the highest heat among all tested values. Composition analysis shows that stainless steel 201 primarily contains Fe, Cr, and Mn, while AISI 1040 is mostly composed of Fe. Variations in welding current also affect the microstructure, with the formation of phases such as widmanstätten ferrite and acicular ferrite, which significantly influence the mechanical properties of the welded joint.
Demonstrasi Gasifikasi Tempurung Kelapa pada Masyarakat Desa Vidian, Fajri; Fitriani, Heni; Arief, Taufik; Alian, Helmy; Yani, Irsyadi; Hadi, Qomarul; Thamrin, Ismail; Zulkarnain, Zulkarnain; Manik, Dion Daud; Rasyid, Abdul; Simarmata, Johanes; Situmeang, Abetnego; Paroluan, Brian Einstein; Doloksaribu, Mikael
Prima Abdika: Jurnal Pengabdian Masyarakat Vol. 4 No. 1 (2024): Volume 4 Nomor 1 Tahun 2024
Publisher : Program Studi Pendidikan Guru Sekolah Dasar Universitas Flores Ende

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37478/abdika.v4i1.3716

Abstract

The dedication to this activity was prompted by the lack of awareness about the potential use of coconut shells as gas fuel, like LPG, in Tebing Gerinting Selatan Village, as well as in Ogan Ilir Villages in general. The main aim of this activity is to educate the community in Tebing Gerinting Selatan on the technology of converting coconut shells into gas fuel using gasification technology. The educational process includes presentations, demonstrations, and discussions. During the demonstration phase, participants were shown how to operate coconut shell gasification equipment to produce gas fuel. The results of this activity were very encouraging as many participants showed a keen interest in the process and equipment used during the discussion phase. Based on the success of this activity, it can be concluded that there is a high level of public interest in coconut shell gasification technology, and there is a strong desire to apply this equipment to the kerupuk kemplang grilling process in the village.
SOCIALIZATION OF WOOD CHARCOAL GASIFICATION USING DOWNDRAFT GASIFIER Vidian, Fajri; Fitriani, Heni; Arief, Taufik; Alian, Helmy; Hadi, Qomarul; Amri, Julil; Aprianti, Tine; Ramadhan, Daud; Maulana, Gilang Rifki; Manurung, Samuel Takkas; Siregar, Edwin Fernando; Ramadhan, Rizky Fajar; Repaldo, Repaldo; Muslim, Muhammad; Ramadhoni, Muhammad Fathur Arya; Sarie, Tri Mulyani; Aulia, Nia
Abdi Dosen : Jurnal Pengabdian Pada Masyarakat Vol. 9 No. 1 (2025): MARET
Publisher : LPPM Univ. Ibn Khaldun Bogor

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32832/abdidos.v9i1.2632

Abstract

The reduction in fossil energy requires alternative energy that can be renewed. Wood charcoal is one of the alternative sources that can be renewed. Wood charcoal is used to produce energy through direct combustion until now, such as in Pulau Semambu Village, Ogan Ilir, and South Sumatra. The Gasification Method is one technique for converting wood charcoal into gas fuel. This method is not widely known by the community, especially the Pulau Semambu Village, Ogan Ilir people. This Community Service aims to socialize wood charcoal gasification to produce gas fuel in the Pulau Semambu Village Community, South Sumatra. Community service is carried out through Presentations, Q&As, discussions, and demonstrations. The demonstration results showed that the Pulau Semambu Community was very interested in the material provided and the demonstration of making gas fuel from wood charcoal with a gasification process. The demonstration shows that 3 kg of fuel can produce gas for about 50 minutes. The gas fuel formed is identified by the combustion of the resulting gas, which makes the flame.
Co-Authors A.A. Ketut Agung Cahyawan W Abdul Rasyid Agung Mataram Ahmad Sumadi Amri, Julil Aprianti, Tine Aulia, Nia Darmawi . Doloksaribu, Mikael Ellyanie Fajri Vidian Fusito Fusito Gunawan Gunawan Hardiyanto, Dwiki Helmy Alian Heni Fitriani Irsyadi Yani Irwin Bizzy Ismail Thamrin M. Badaruddin Manik, Dion Daud Manurung, Samuel Takkas Matondang, Ifsya Ussalam Maulana, Gilang Rifki Muhammad Muslim, Muhammad Paroluan, Brian Einstein Ramadhan, Daud Ramadhan, Rizky Fajar Ramadhani, Muhammad Iqbal Ramadhoni, Muhammad Fathur Arya Repaldo, Repaldo Sarie, Tri Mulyani Simarmata, Johanes Siregar, Edwin Fernando Situmeang, Abetnego Taufik Arief Wiwik Yunitaningrum Zamheri, Ahamad Zamheri, Ahmad Zulkarnain Zulkarnain