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All Journal Communications in Science and Technology Jurnal Teknik Mesin Cakram Jurnal Abdimas Bina Bangsa Makara Journal of Technology
Simbolon, Silviana
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Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Education Electrical & Electronics Engineering Engineering Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Mathematics Mechanical Engineering Social Sciences Other

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Preparation, synthesis and characterizations of La0.7Sr0.3Mn(1-y)Ni(y)O3 alloy Setiawan, Jan; Susetyo, Ferry Budhi; Nanto, Dwi; Simbolon, Silviana; Notonegoro, Hamdan Akbar; Al Farizi, Taufiq; Yunasfi; Tihera, Dinda; Ramlan
Communications in Science and Technology Vol 9 No 1 (2024)
Publisher : Komunitas Ilmuwan dan Profesional Muslim Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21924/cst.9.1.2024.1361

Abstract

Nickel (Ni) doped in the perovskite manganite could result in superior properties. The effect of the Ni on the morphology, crystallographic orientation, and magnetic properties of La0.7Sr0.3Mn(1-y)Ni(y)O3 alloy (y = 0.1, 0.3, 0.5, and 0.7), therefore, was undertaken. La0.7Sr0.3Mn(1-y)Ni(y)O3 alloy was firstly processed using a ball milling process, and again processed through heat treatment and crushing at the end of the synthesis process. Powder alloy was then investigated using a scanning electron microscope equipped with scanning electron microscope and energy dispersive spectroscopy (SEM-EDS), x-ray diffraction (XRD), and vibrating sample magnetometer (VSM). The particle size became smaller and agglomerated as the amount of Ni doping increased. The polycrystal structure phase formed would become more complex when the Ni doping was 0.5 and 0.7, where the dominant phase formed was La2NiO4 even though the La0.7Sr0.3Mn(1-y)Ni(y)O3 phase was still formed. The magnetic characteristics showed that the Ni doping of 0.1 had a higher magnetization value around 4.2 emu/g at room temperature.
LILIN AROMA TERAPI: PEMANFAATAN LIMBAH MINYAK JELANTAH SEBAGAI UPAYA KEPEDULIAN TERHADAP LINGKUNGAN Fikri, Ali; Jamaludin, Jamaludin; Junaedi , Nurasikin; Alifia, Yolla; Kusuma, Jaka Wijaya; Simbolon, Silviana
Jurnal Abdimas Bina Bangsa Vol. 5 No. 2 (2024): Jurnal Abdimas Bina Bangsa
Publisher : LPPM Universitas Bina Bangsa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46306/jabb.v5i2.1742

Abstract

Every household produces used cooking oil. Generally, used cooking oil is disposed of into the environment without any environmentally sound control. This situation is exacerbated by the lack of public knowledge regarding the impact of used cooking oil on health and the environment. Many people still don't know about the use of used cooking oil, even though it has extraordinary economic value. Therefore, it is important to understand the use of used cooking oil in the household environment. There is a need for innovation in the use of used cooking oil waste into products with economic value. The innovation is provided in the form of knowledge exchange with the public regarding the use of used cooking oil waste into aromatherapy candle products. This activity was carried out during the 2024 High Mandiri Mutual Cooperation Village Development Program (PTMGRMD). This activity aims to provide education to mothers about the use of used cooking oil in other forms, one of which is making aromatherapy candles at the Kampung Baru hall, Cikedal, Pandeglang Banten. The activity participants consisted of 21 mothers, taking place through methods, discussions, demonstrations and direct practice. The results of this service activity show that the participants were very enthusiastic and listened throughout the process and that the participants were active when carrying out the practice. After this activity takes place, it is hoped that mothers will become more aware of the dangers of using used cooking oil and can use used cooking oil into a more useful product.
Desain Perancangan Mesin Cetak Rengginang Berbasis Simulasi Aranda, Irwan; Simbolon, Silviana; Purnomo, Herlono Mawardi; Gulo, Elvin Cinta Kasih; Muanifah, Suciati; Yunus, Muhammad
Jurnal Teknik Mesin Cakram Vol. 8 No. 2 (2025): Jurnal Teknik Mesin Cakram
Publisher : Universitas Pamulang

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Abstract

Penelitian ini bertujuan untuk merancang dan menganalisis mesin cetak rengginang dengan kapasitas produksi 10 kg/jam menggunakan pendekatan simulasi SolidWorks. Kapasitas mesin dihitung menghasilkan 333 keping rengginang per jam dengan siklus operasi sebanyak 84 siklus per jam dan gaya tekan aktuator sebesar 3600 N. Kekuatan sambungan pengelasan dianalisis dengan luas penampang titik las sebesar 961 × 10⁻⁶ m², menghasilkan tegangan geser sebesar 7,14 MPa dan faktor keamanan sambungan las sebesar 14,00. Simulasi struktur menggunakan perangkat lunak SolidWorks menunjukkan nilai stress sebesar 0,3744 MPa, displacement sebesar 0,009212 mm, dan faktor keamanan sebesar 668,3. Hasil perhitungan teoritis menunjukkan stress sebesar 1,531 MPa, displacement 0,001378 mm, dan faktor keamanan 163,3. Perbedaan hasil simulasi dan teoritis mengindikasikan bahwa desain mesin telah memenuhi aspek kekuatan dan keamanan dengan efisiensi tinggi. Studi ini memberikan dasar yang kuat untuk pengembangan mesin cetak rengginang yang aman, efisien, dan optimal dalam produksi. Abstract: This study aims to design and analyze a rengginang printing machine with a production capacity of 10 kg/hour using SolidWorks simulation. The machine capacity is calculated to produce 333 rengginang pieces per hour with an operating cycle of 84 cycles per hour and an actuator pressing force of 3600 N. The weld joint strength was analyzed with a weld spot area of 961 × 10⁻⁶ m², resulting in a shear stress of 7.14 MPa and a weld joint safety factor of 14.00. Structural simulation using SolidWorks showed a stress value of 0.3744 MPa, displacement of 0.009212 mm, and a safety factor of 668.3. The theoretical calculations indicated a stress of 1.531 MPa, displacement of 0.001378 mm, and a safety factor of 163.3. The differences between simulation and theoretical results indicate that the machine design meets strength and safety requirements with high efficiency. This study provides a solid foundation for developing a safe, efficient, and optimal rengginang printing machine.
Effect of Audio–Sonic Waves on Heat Transfer Enhancement in a Distilled Water-Based Heat Exchanger Tetuko, Agggito Pringgo; Sari, Ayu Yuswati; Simbolon, Silviana; Sebayang, Achmad M.S.; Effendi, Nur H; Ernando, Riko; Fachredzy, Amdy; Asri, Nining S; Setiadi, Eko A; Sebayang, Perdamean
Makara Journal of Technology Vol. 29, No. 1
Publisher : UI Scholars Hub

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Abstract

In this research, the influence of audio–sonic waves on distilled water used as the working fluid in a shell-and-tube heat exchanger was examined. The audio–sonic wave frequencies and flow rates of the cold and hot liquids were varied as follows: 4.85, 6.78, and 13.43 kHz for the audio–sonic waves; 0.3, 0.4, and 0.5 l/min for the cold liquid; and 0.76, 1.0, and 1.5 l/min for the hot liquid. An increase in the audio–sonic wave frequency enhanced both the overall heat transfer coefficient (U) and the enhancement factor (EF). The optimum values of U and EF, measured at 300 W/m3 ·°C and 1.05, respectively, were achieved at the highest frequency of 13.43 kHz. Additionally, the flow rates of the hot and cold liquids in the heat exchanger significantly influenced the optimal values of U and EF.
Co-Authors Alifia, Yolla Aranda, Irwan Asri, Nining S Dwi Nanto, Dwi Effendi, Nur H Ernando, Riko Fachredzy, Amdy Ferry Budhi Susetyo Gulo, Elvin Cinta Kasih Jaka Wijaya Kusuma Jamaludin . Jan Setiawan Junaedi , Nurasikin M. Ali Fikri Muanifah, Suciati Muhammad Yunus Notonegoro, Hamdan Akbar Perdamean Sebayang Purnomo, Herlono Mawardi Ramlan Sari, Ayu Yuswati Sebayang, Achmad M.S. Setiadi, Eko A Taufiq Al Farizi Tetuko, Agggito Pringgo Tihera, Dinda Yunasfi