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All Journal Abdimas Galuh: Jurnal Pengabdian Kepada Masyarakat Indonesian Applied Physics Letters Jurnal Ilmiah Sains Prosiding Seminar Nasional Unimus
Jan Ady
Department Of Physics, Faculty Of Science And Technology, Universitas Airlangga, Indonesia
Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Economics, Econometrics & Finance Electrical & Electronics Engineering Engineering Health Professions Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mathematics Nursing Physics Public Health

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STUDI KEKUATAN TARIK DAN KEKERASAN LOGAM BAJA P.25 dan S.25 DENGAN METODE NEWTON Jan Ady
JURNAL ILMIAH SAINS Volume 11 Nomor 2, Oktober 2011
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35799/jis.11.2.2011.193

Abstract

STUDI KEKUATAN TARIK DAN KEKERASAN LOGAM BAJAP.25 dan S.25 DENGAN METODE NEWTON Jan Ady1) 1) Departemen Fisika Fakultas Sains dan Teknologi Universitas Airlangga Surabaya Jan_ady@yahoo.com ABSTRAK Telah dilakukan studi tentang sifat mekanik logam baja jenis polos P.25 dan ulir S.25  dengan metode Newton. Uji kekuatan tarik dilakukan dengan mengukur tegangan-regangan menggunakan Autograph sedangkan uji kekerasan dilakukan dengan pengukuran Hardness Vickers Tester. Nilai modulus elastisitas baja S. 25 adalah 54,80 Kg/mm2 dan 31,78 Kg/mm2 untuk baja P.25. Rata-rata nilai kekerasan adalah 227,2 kgf/mm2 untuk baja S.25 dan 195,6 kgf/mm2 untuk baja P.25.  Hasil ini menunjukkan bahwa logam baja S.25 memiliki kekuatan tarik dan kekerasan yang relatif lebih baik dari pada logam baja P.25, sesuai demgan pengukuran dan perhitungan menggunakan metode Newton. Kata Kunci: Baja P.25 and S.25,  kekerasan, kuat tarik,  metode Newton   STUDY ON THE TENSILE STRENGTH AND HARDNESS OF STEEL TYPE P.25 AND S.25 USING NEWTONIAN METHOD ABSTRACT The mechanical properties of steel P.25 (smooth type) and S.25 (screwed type) was studied using Newtonian method.  The tensile strength was evaluated by measuring the stress-strain using autograph, whereas the hardness was measured by Hardness Vickers Tester.  The modulus elasticity was 54,80 Kg/mm2 for steel S.25 and 31,78 Kg/mm2 for steel P.25.  The average hardness was 227,2 kgf/mm2 for steel S.25 and 195,6 kgf/mm2 for steelP.25.  These results indicated that the tensile strength and hardness of steel S.25 were relatively better than steel P.25, based on the measurement and calculation using Newtonian method. Keywords :  Steel P.25 and S.25, Newtonian, Hardness, Tensile strength, Newtonian method
PENGUATAN KARAKTER KEWIRAUSAHAAN SISWA SMK MELALUI PELATIHAN GREEN SINTESIS NANOPARTIKEL DARI EKSTRAK TUMBUHAN UNTUK TABIR SURYA Siswanto, Siswanto; Ady, Jan; Rudyardjo, Djony Izak; Hikmawati, Dyah; Aminatun, Aminatun; Zaidan, Andi Hamim; Samian, Samian; Supadi, Supadi; Firdaus, Indri K; Junico, Vallery Ofelia
Prosiding Seminar Nasional Unimus Vol 7 (2024): Transformasi Teknologi Menuju Indonesia Sehat dan Pencapaian Sustainable Development G
Publisher : Universitas Muhammadiyah Semarang

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Abstract

Pengabdian masyarakat di SMK ini bertujuan untuk memperkuat karakter kewirausahaan siswa melaluipelatihan berbasis inovasi teknologi, yakni green sintesis nanopartikel dari ekstrak tumbuhan untuk tabirsurya. Pelatihan ini dirancang untuk mengajarkan siswa teknik sintesis nanopartikel ramah lingkungan yangmemiliki aplikasi praktis dalam pembuatan produk kosmetik, khususnya tabir surya. Dalam kegiatan ini,peserta tidak hanya belajar tentang aspek teknis, tetapi juga tentang kewirausahaan dan potensi pasarproduk yang mereka buat. Evaluasi tingkat kepuasan peserta menggunakan Customer Satisfaction Index(CSI) menunjukkan nilai rerata sebesar 83,77%, mencerminkan kepuasan tinggi terhadap pelatihan yangdiberikan. Selain itu, terdapat peningkatan signifikan dalam pemahaman materi yang diukur melalui tespre-test dan post-test. Nilai pre-test peserta yang berada dalam rentang 20-60 meningkat menjadi 75-95pada post-test, menandakan efektivitas pelatihan dalam meningkatkan pengetahuan dan keterampilansiswa. Kegiatan ini tidak hanya memperluas wawasan siswa tentang teknologi nano dan keberlanjutan,tetapi juga memotivasi mereka untuk mengeksplorasi peluang kewirausahaan dalam bidang industrikosmetik. Dengan hasil ini, diharapkan siswa dapat lebih siap menghadapi tantangan industri serta memilikisikap kewirausahaan yang kuat Kata Kunci: SMK, Kewirausahaan, Nanopartikel, Green Sintesis, Tabir Surya
Pembuatan Pupuk Organik dengan Memperkecil Ukuran Bahan Baku Sebagai Upaya Mandiri Pupuk Di Desa Bulus, Bandung Tulungagung Siswanto, Siswanto; Hikmawati, Dyah; Aminatun, Aminatun; Djony Izak, Djony Izak; Ady, Jan; Ukhrowiyah, Nuril; Sapuan, Imam; Arifianto, Deny; Supardi, Adri; Rochman, Mochammad Nurur
Abdimas Galuh Vol 7, No 1 (2025): Maret 2025
Publisher : Universitas Galuh

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25157/ag.v7i1.17061

Abstract

Kelangkaan pupuk bersubsidi telah menjadi permasalahan bagi petani di seluruh Indonesia, termasuk di Desa Bulus, Bandung, Tulungagung. Terjadi ketidakseimbangan antara pasokan dan permintaan, yang berdampak pada produktivitas pertanian. Penggunaan pupuk urea yang berlebihan dapat merusak kesuburan tanah dan berkontribusi terhadap pencemaran lingkungan. Pupuk organik menjadi solusi alternatif bagi lingkungan dan kesehatan tanah jangka panjang. Selain itu dapat meningkatkan retensi air, dan keberagaman mikroba, sehingga mengurangi ketergantungan pada pupuk kimia. Salah satu metode yang menjanjikan untuk produksi pupuk organik adalah komposting, khususnya metode Takakura, yang menggunakan fermentasi terkontrol dari bahan organik. Selain itu, pengurangan ukuran sampah organik melalui perajangan dapat mempercepat proses dekomposisi, meningkatkan efisiensi dan kualitas kompos. Program pengabdian masyarakat di Desa Bulus ini bertujuan untuk mengedukasi petani tentang produksi pupuk organik yang efisien, menggunakan metode Takakura, tong komposter, dan pupuk cair organik. Pelatihan ini melibatkan 30 petani dan berfokus pada peningkatan efisiensi produksi pupuk melalui perajangan sampah organik. Evaluasi pasca-pelatihan menunjukkan peningkatan yang signifikan dalam pengetahuan dan keterampilan peserta, dengan rata-rata nilai meningkat sebesar 25-30 poin. Penggunaan bahan organik yang dipotong kecil-kecil mengurangi waktu pengomposan dan meningkatkan kualitas pupuk. Evaluasi program menunjukkan kepuasan yang tinggi di kalangan peserta, terutama terkait relevansi dan penerapan praktis materi yang disampaikan. Hasil ini menunjukkan bahwa produksi pupuk organik, bersama dengan teknik pengolahan sampah yang efisien, dapat mendukung pertanian yang berkelanjutan di komunitas pedesaan yang menghadapi kelangkaan pupuk.
CHARACTERIZATION SCAFFOLD 3D-PRINTING PLA WITH HYDROXYAPATITE-CHITOSAN-AgNPs COATING TO TREAT MANDIBULAR OSTEOMYELITIS Malini, Mirza Hema; Hanan, Annisa; Ady, Jan; Aminatun
Indonesian Applied Physics Letters Vol. 6 No. 2 (2025): Indonesian Applied Physics Letters - December 2025
Publisher : Universitas Airlangga

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20473/iapl.v6i2.84889

Abstract

Osteomyelitis The mandible can cause pathological fractures of the bones and interfere with the function of the mandible, so it is necessary to perform resection for the removal of the infected part. As a result of resection, it is necessary to carry out mandibular reconstruction using Scaffold. The study aims to discuss the effect of PLA surface modification with HA-Chitosan-AgNPs coating on morphological structure, porosity, compressive strength, hydrophilicity properties and antibacterial properties and determine the best sample variation from the characterization carried out. Scaffold made from PLA 3D-printing material using the Fused Deposition Modelling (FDM). The variation in composition (wt%) of hydroxyapatite-chitosan-AgNPs used as coatings was A (100:0:0), B (90:10:0), C (90:7:3), D (90:5:5), E (90:3:7), and F (90:0:10). The results obtained are Scaffold PLA with HA-chitosan-AgNPs coating has pores interconnected with rough surface walls. The porosity value varies between 40%-53%. HA-Kitosan-AgNPs as a surface modification are also able to increase compressive strength, antibacterial properties, and hydrophilicity Scaffold The PLA with the best sample variation is indicated by sample D (90:5:5). Based on these results, it shows that Scaffold PLA with HA-Kitosan-AgNPs coating is potentially used as a mandibular reconstruction.
The Effect of Various Milling Time Duration On The Characteristic of Glass Ionomer Cement (GIC) with The Addition of Liquid Pmve-Ma Rudyardjo, Djony Izak; Ady, Jan; Fauzi, Aditya Budi
Indonesian Applied Physics Letters Vol. 1 No. 2 (2020): Indonesian Applied Physics Letters - Desember 2020
Publisher : Universitas Airlangga

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20473/iapl.v1i2.23445

Abstract

A study entitled The Effect of Milling Time Duration on the Characteristics of Glass Ionomer Cement (GIC) Dental Cement with the Addition of Liquid PMVE-MA aims to determine the effect of milling time duration on the physical and mechanical properties of Glass Ionomer Cement, and to determine the optimum milling time duration in order to obtain GIC dental cement with the best characteristic to be applied as a dental restoration material. The duration of the milling time was 80 minutes, 90 minutes, 100 minutes, and 110 minutes. After the milling process, the next process was sintered at a temperature of 1200 for 1 hour to form Powder Glass Ionomer. Then Powder Glass Ionomer was added with Poly Methyl Vinyl Ether-Maleic Acid (PMVE-MA) to form a paste. The mixed paste was then formed. Sample characterization was the density test, the compressive strength test, and the vickers hardness test. The results of the density test obtained the highest value of 1.683 gram / cm3, the compressive strength test of 71.841 MPa, and the highest value of the hardness test of 92.3 Kg / mm2. These results increased as the increasing milling time duration up to 110 minutes.
DIAMOND LIKE CARBON (DLC) COATING ON CARBON STEEL WITH PLASMA TECHNIQUES FOR GAS PIPES Yahya, Ilham Nur Dimas; Rudyardj, Djony Izak; Ady, Jan
Indonesian Applied Physics Letters Vol. 1 No. 2 (2020): Indonesian Applied Physics Letters - Desember 2020
Publisher : Universitas Airlangga

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20473/iapl.v1i2.23446

Abstract

A study about coating on carbon steel by plasma technique aims to determine the variation of time and pressure on the hardness and corrosion strength of a material. The material used in this research was carbon steel with carbon chest of 0.245%. This carbon steel was a plasma technique process with a temperature of 300oC and various pressure variations, such as 1.2 mbar; 1.4 mbar; 1.6 mbar; 1.8 mbar; And 2.0 mbar. The highest hardness was found at 1.8 mbar pressure, which was 161.7 VHN. Then set with a temperature of 300oC and a pressure of 1.8 mbar and a time variation, which were 1 hour; 1.5 hours; 2 hours; 2.5 hours; 3 hours. The largest hardness value was obtained at 3 hours with a hardness value of 161.7 VHN. Then the corrosion test obtained the optimum value at 2 hours with a corrosion value of 0.69 mpy. This was because on the surface of carbon steel there was a layer of Diamond Like Carbon (DLC).
MECHANICAL CHARACTERISTIC STUDY OF COBALT ALLOY PREPARED BY POWDER METALLURGY METHOD Aminatun, Aminatun; Ady, Jan; KD, Mega Farynda
Indonesian Applied Physics Letters Vol. 1 No. 2 (2020): Indonesian Applied Physics Letters - Desember 2020
Publisher : Universitas Airlangga

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20473/iapl.v1i2.23448

Abstract

This study was conducted to determine the effect of compaction pressure and sintering temperature variations on the properties of physical, mechanical, and micro cobalt alloy. Manufacture of the cobalt alloy with compositions 63,75%, chromium 30%, molybdenum 5%, manganese 0,5%, silicon 0,5%, and 0,25% nitrogen using powder metallurgy method. Variations of compaction pressure were 339,70 MPa, 396,31 MPa, dan 452,93 MPa, and sintered at temperature 12000C and 130 0C for 2 hours of holding time. Density was increased along with the increasing compaction pressure and sintering temperature (3,9-6,6 g/cm). The hardness was also increased along with the increasing compaction pressure and sintering temperature  205,1-316,2 VHN. XRD results showed that γ phase with fcc structure was formed at the temperature of 12000C and 13000C for all variations of pressure. SEM-EDX results showed that the oxygen content decreased along with increasing compaction pressure and sintering temperature. Based on ASTM F75 hardness standard, the sample with compaction pressure 452,93 MPa and sintered at 13000C was the best cobalt alloy with a hardness value of 316.2 VHN.
Optimization of Additional Composition Variations ZnO Nanoparticles on The Characteristics of Porous Hydroxypatite as Bone Filler Azkiyah, Fardatul; Rudyardjo, M.Si., Drs. Djony Izak; Ady, Jan
Indonesian Applied Physics Letters Vol. 2 No. 2 (2021): Indonesian Applied Physics Letters - December 2021
Publisher : Universitas Airlangga

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20473/iapl.v2i2.31699

Abstract

Research on the synthesis and characterization of porous hydroxyapatite with the addition of ZnO nanoparticles has been carried out through a combination of foam immersion and injection methods. This research was conducted to optimize the previous research by increasing the variation of ZnO composition and adding the injection method to the research process. The materials used in this research include hydroxyapatite nanoparticles, ZnO nanoparticles, Aquades, PVA and polyurethane foam. Manufacturing is done by immersing polyurethane foam into a slurry. Slurry is a mixture of PVA and hydroxyapatite solutions with variations in the addition of ZnO nanoparticles (8 wt%, 10 wt%, 12 wt%, and 14 wt%). Then inject the remaining slurry into the foam. After that the sample was dried and heated at a temperature of 650ºC to remove foam and PVA, then the sample was sintered at a temperature of 1200ºC for 3 hours. Based on SEM analysis, porosity test, and compressive strength test, the best results were shown by sample IV because it had a pore diameter of 142.9 – 371.4 m with a porosity of 69.983%, a compressive strength value of 1.8653 MPa and non-toxic. The best results have not met the standard for bone filler application. In further research, improvements need to be made by using other additives such as ZrO2, so that it can improve the mechanical properties of porous hydroxyapatite to meet standard bone filler applications.
Co-Authors Adri Supardi, Adri Aminatun Aminatun Aminatun Andi Hamim Zaidan Arifianto, Deny Aziza Anggi Maiyanti Azkiyah, Fardatul Djony Izak Rudyardjo Djony Izak, Djony Izak Eka Viandari, Eka Fauzi, Aditya Budi Firdaus, Indri K Hanan, Annisa Imam Sapuan Junico, Vallery Ofelia KD, Mega Farynda Malini, Mirza Hema Nuril Ukhrowiyah Rochman, Mochammad Nurur Rudyardj, Djony Izak S Siswanto Samian Supadi Supadi Yahya, Ilham Nur Dimas