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Hariyati Lubis, Hariyati
Universitas Amir Hamzah
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PEMBUATAN DAN KARAKTERISASI SUPERKONDUKTOR BAHAN MIKROPARTIKEL BERBASIS BSCCO FASA 2223 DI DOPING Sn DAN Pb Sihombing, Eidi; Lubis, Hariyati
Jurnal Spektra Vol 16, No 3 (2015): Spektra: Jurnal Fisika dan Aplikasinya
Publisher : Jurnal Spektra

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

Abstract

ABSTRAK  Superkonduktor berbasis bismut Bi2Sr2Ca2Cu3O10+δ (BSCCO) fasa 2223 merupakan bahan superkonduktif yang banyak dikaji untuk meningkatkan suhu kritis dan memperbaiki sifat mekanik yang merupakan masalah dalam aplikasi teknologi. Berbagai metode telah di upayakan untuk meningkatkan suhu kritis dan memperbaiki sifat mekanik yang berkaitan dengan struktur yang diharapkan pada bahan superkonduktor berbasis YBCO, BSCCO, TBCCO, HBCCO.Penelitian superkonduktor ini berbasis BSCCO dibuat dari bahan-bahan nitrat seperti: Bismuth Nitrate (BiNO3), Stronsium Nitrate (SrNO3), Calsium Nitrate (CaNO3), Cupri Nitrate (CuNO3) dan sebagai doping adalah Timbal Nitrate( PbNO3) dan Timah oksida (SnO). Bahan-bahan ini direaksikan melalui reaksi padatan dengan perbandingan molar Bi:Sr:Ca:Cu adalah 2:2:2:3. Reaksi padatan dimaksud dilakukan dengan menggunakan Ballmill pada kelajuan 500 rpm selama 8 jam, menghasilkan partikel berdimeter 207,8 nm di ukur melalui Particel Size Analyzer (PSA), selanjutnya bahan ini di kalsinasi pada suhu 8200C selama 80 jam dan di cetak pada wadah berukuran diameter 1,0 cm, tebal 0,5 cm diberi tekanan 5,0 ton ditahan selama 4 jam, selanjutnya disintering pada suhu 8500C selama 12 jam.Hasil yang diperoleh adalah superkonduktor B(Pb, Sn) SCCO memiliki levitasi sekitar 2,5 cm. Uji XRD memberi hasil parameter kisi: a = 20.8710 Å, b = 9.4960 Å, c = 5.6000 Å disimpulkan bahwa kisi BPbSnSCCO adalah ortorombik dengan permukaan memiliki gumpalan acak yang diperoleh dari uji SEM. Kata kunci : Superkonduktor, BPbSnCCO. PREPARATION AND CHARACTERIZATION OF SUPERCONDUCTORS BASED MICROPARTICLES MATERIAL BSCCO 2223 PHASE IN DOPING Sn AND Pb  ABSTRACT  Bismuth-based superconductors Bi2Sr2Ca2Cu3O10+δ (BSCCO) 2223 phase superconducting is a material that is widely studied to enhanced the critical temperature and improve mechanical properties is a problem in the application of technology. Various methods have been done to enhanced the critical temperature and improve mechanical properties relating to the expected structure based on superconducting materials YBCO, BSCCO, TBCCO, HBCCO. This research-based BSCCO made from nitrate materials: Bismuth Nitrate (BiNO3), Strontium Nitrate (SrNO3), Calcium Nitrate (CaNO3), Copper Nitrate (CuNO3) and as doping is Lead Nitrate (PbNO3) and tin oxide (SnO). These materials are reacted by solids reaction with a molar ratio of Bi:Sr:Ca:Cu is 2:2:2:3. Solid state reaction is carried out by using ballmill speed of 500 rpm for 8 hours, obtained dimeter 207.8 nm particles measured by particle size analyzer (PSA), and in the calcination at a temperature of 8200C for 80 hours and be formed on the cast diameter 1.0 cm, 0.5 cm thick pressurized 5.0 tons for 4 hours, then sintering at a temperature of 8500C for 12 hours. The results obtained are superconducting B(Pb, Sn)SCCO has Meisneer levitation approximately 2.5 cm. XRD test gives results lattice parameters: a = 20.8710 Å, b = 9.4960 Å, c = 5.6000 Å, B(PbSn)SCCO concluded that the lattice is orthorhombic with a surface having a random clotted granules obtained from SEM test. Key words : Superconductor, B(PSn)SCCO
Effect of Sintering Time on Superconducting Wire Bi-Pb-Sr-Ca-Cu-O With Dopant MgO Sheated Ag Using Powder in Tube Method Hariyati Lubis; Agung Imaduddin; Eddy Marlianto; Pius Sebleku; Eidi Sihombing
Journal of Aceh Physics Society Volume 7 Number 1, January 2018
Publisher : PSI-Aceh

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Abstract

Telah dilakukan penelitian mengenai variasi waktu proses sintering pada kawat superkonduktor Bi-Pb-Sr-Ca-Cu-O dopan MgO dengan selubung Ag. Bahan-bahan yang digunakan ialah Bismuth (III) Oksida, Timbal (IV) Oksida, Strontium Carbonate, Calcium Carbonate, Copper (II) Oksida dan Magnesium Oksida dengan tingkat kemurnian tinggi. Proses sintering dalam furnance dilakukan pada suhu konstan selama 30 jam dan 9 jam lalu didinginkan dalam tungku. Hasil karakterisasi X-Ray Diffraction dan search match v1.10, sampel kawat superkonduktor monofilamen Bi1.6Pb0.4Sr2Ca2Cu3O10+δ dan Bi1,6Pb0,4Ca1,95Mg0,05Cu3O10+δ dengan variasi waktu sintering masing-masing 30 jam dan 9 jam memiliki nilai intensitas sebesar 993,77cts dan 902,86 cts. Penambahan waktu sintering pada sampel superkonduktor mengakibatkan penurunan fraksi volume 2223 dengan masing-masing nilai fraksi volume sebesar 60% dan 59%, hal ini menunjukkan adanya impuritas berupa senyawa CuO. Parameter kisi diperoleh yaitu Orthorhombic dengan a=5,347 Å, b=5,416 Å dan c=30,67 Å. Hasil morfologi SEM menunjukkan permukaan homogenitas butir sampel terlihat cukup baik, dan terdistribusi secara acak. Pada sampel kawat superkonduktor monofilamen Bi1.6Pb0.4Sr2Ca1.95Mg0.05Cu3O10+δ dengan waktu sintering 30 jam menunjukkan Tconset=72 K dan Tczero=33 K. Sampel kawat superkonduktor monofilamen Bi1.6Pb0.4Sr2Ca1.95Mg0.05Cu3O10+δ dengan waktu sintering 9 jam menunjukkan Tconset=78 K dan Tczero=58 K. Variation of sintering time has been done in Bi-Pb-Sr-Ca-Cu-O superconducting wires dopant MgO using Ag-sheathed. The samples were prepared using highly pure powders of Bismuth (III) Oxide, Lead (IV) Oxide, Strontium Carbonate, Calcium Carbonate, Copper (II) Oxide and Magnesium Oxide. Sintered at a constant temperature for 30 h and 9 h then cooled in the furnace. The structure of the samples was studied by X-Ray Diffraction and search match v1.10. XRD patterns of Bi1.6Pb0.4Sr2Ca2Cu3O10+δ and Bi1,6Pb0,4Ca1,95Mg0,05Cu3O10+δ monofilament superconducting wires using variation of sintering time for 30 h and 9 h have intensity values of 993.77cts and 902.86 cts. The addition of sintering time to superconductor samples resulted decrease in the volume fraction of 2223 with each volume fraction value of 60% and 59% indicating of impurity phases present CuO compounds. The Orthorhombic structure with the lattice constants are calculated as a = 5,347 Å, b = 5,416 Å, and c = 30,67 Å. The surface morphology studied by SEM, show that surface homogeneity, each grain grows in random directions. For the prepared Bi1,6Pb0,4Ca1,95Mg0,05Cu3O10+δ monofilament superconducting wires sample with 30 h, the onset Tc is at 72 K and the resistivity drops to zero at 33 K. Sample of Bi1.6Pb0.4Sr2Ca1.95Mg0.05Cu3O10+δ δ monofilament superconducting wires with 9 h, the onset Tc is at 78 K and the resistivity drops to zero at 58 K. Keywords : BPSCCO superconducting wire, Sheated Ag, Dopant MgO, Sintering time DAFTAR PUSTAKAAbbas M.M., Abass L.K and Salman U., (2012), Influences of Sintering Time on the Tc of Bi2-xCuxPb0.3Sr2Ca2Cu3010+ High Temperature Superconductors, Energy Procedia 18, 215-224 Abbas, M.M., Abbas, L.K., Bahedh, H.S. 2015. Superconducting Properties of Bi2-SbxPb0,3Sr1,9Ba0,1Ca2Cu3O10+δ Compounds. Journal of Applied Science Research. 11. 22: 164-172Darsono, N., Imaduddin, A., Raju, K., Yoon, D.H., (2015), Synthesis and Characterization of Bi1.6Pb0.4Sr2Ca2Cu3O7 Superconducting Oxide by High-Energy Milling, J Supercond Nov Magn.E. Chew,. (2010), Superconducting Transformer Design And Construction, University of Canterbury, Christchurch, New Zealand. MarchHamadneh, I., Halim, S. A., dan Lee, C. K., (2006),  Characterization of Bi1.6Pb0.4Sr2Ca2Cu3Oy Ceramic Superconductor Prepared Via Coprecipitation Method at Different Sintering Time, J. Mater. Sci, 41: 5526-5530.Hermiz G.Y., Aljurani B.A., Beayaty M.A., (2014), Effect of Mn Substitution on the Superconducting Properties of Bi1.7Pb0,3Sr2Ca2-xMnxCu3O10+, International Journal Of Engineering and Advanced Technology (IJEAT). 3. 4: 213-217John R Hull, (2003), Applications of high-temperature superconductors in power technology, Reports on Progress in Physics, Volume 66, Number 11Lu, X.Y., Yi, D., Chen, H., Nagata, A. 2016. Effect of Sn, MgO and Ag2O mix-doping on the formation and superconducting properties of Bi-2223 Ag/tapes. Physics Procedia. 81: 129-132Meretliev Sh., Sadykov K.B., Berkeliev A., (2000), Doping of High Temperature Superconductors, Turk J Phy.24: 39-48Mohammed, N. H., Ramadhan A., Ali I. A., Ibrahim, I. H., dan Hassan, M. S, (2012), Optimizing the Preparation Conditions of Bi-2223 Superconducting Phase Using PbO and PbO2, Materials Sciences and Applications, 3: 224-233.Roumie, M., Marhaba, S., Awad R., Kork M., Hassan I., Mawassi R., (2014), Effect of Fe2O3 Nano-Oxide Addition on the Superconducting Properties of the (Bi,Pb)-2223 Phase, Journal of Supercond Nov Magn, 27: 143-153Serkan, A., (2008), Production of YBCO Superconductor Sample by Powder-In-Tube Method (PITM); and Effect of Cd and Ga Doping on the System, University, Department of Physics, Malatya-TurkeySharma, D., Kumar, R., Awana, V.P.S. 2013. DC and AC Susceptibility Study of Sol-Gel Synthesized Bi2Sr2CaCu2O8+x Superconductor. Ceramic International. 39:1143-1152
OPTIMISASI HEURISTIK TERHADAP JARINGAN KOMPLEKS Devi Maiya Sari Nasution; Hariyati Lubis; Rika Permata Sari Siregar; Muhammad Zarlis; Syahril Efendi
Juripol (Jurnal Institusi Politeknik Ganesha Medan) Vol. 5 No. 1 (2022): Juripol (Jurnal Institusi Polgan)
Publisher : Politeknik Ganesha Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33395/juripol.v5i1.11331

Abstract

Penelitian ini mengusulkan sebuah solusi matematika untuk masalah optimasi dengan melihat optimisasi heuristic terhadap jaringan kompleks. Optimisasi Heuristik yang diterapkan adalah Algoritma Ant Colony Optimization (ACO). Algoritma yang diadopsi dari perilaku koloni semut. Secara alamiah koloni semut mampu menemukan rute terpendek dalam perjalanan dari sarang ke tempat tempat sumber makanan. Koloni semuat dapat menemukan rute terpendek antara sarang dan sumber makanannya berdasarkan jejak kaki pada lintasan yang telah dilewati. Semakin banyak semut yang melewati suatu lintasan, maka akan semakin jelas bekas jejak kakinya. Algoritma Ant Colony Optimization (ACO) sangat tepat digunakan untuk diterapkan dalam penyelesaian masalah optimisasi, salah satunya adalah menentukan jalur terpendek yang diarahkan kedalam graf lengkap.
Perbandingan Karakterisasi Morfologi Fe3O4 terhadap Fe3O4 Merck melalui Metode Kopresipitasi Hariyati Lubis
Juripol (Jurnal Institusi Politeknik Ganesha Medan) Vol. 5 No. 2 (2022): Juripol (Jurnal Institusi Polgan)
Publisher : Politeknik Ganesha Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33395/juripol.v5i2.11775

Abstract

Pembuatan Fe3O4menggunakan metode kopresipitasi dengan suhu T= 125C telah berhasil dilakukan. Variasi suhu yang bertujuan untuk mengetahui pengaruh suhu terhadap Fe3O4. Bahan pembuatan Fe3O4adalah FeCl2.4H2O dan FeCl3.6H2O. Proses sintesis Fe3O4dikalsinasi pada suhu 125 °C selama 10 jam. Pengujian karakterisasi morfologi menggunakan Scanning Electron Microscope (SEM). Hasil analisis SEM menyatakan bahwa hasilnya tidak homogen karena waktu penggilingan sampel yang tidak cukup lama.. Sehingga perlu dilakukan penggilingan dan pencampuran bahan agar diperoleh hasil Fe3O4 yang mendekati atau sama dengan Merck Fe3O4.
COMPARISON OF ENERGY DOSES 10 MV DISTRIBUTION USING PERCENTAGE DEPTH DOSE (PDD) METHOD ON LINAC: ELECTA AND SIEMENS Martha Rianna; Herty Afrina Sianturi; Hariyati Lubis; Awan Pelawi; Timbangen Sembiring; Marhaposan Situmorang
Jurnal Natural Volume 18, Number 2, June 2018
Publisher : Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (496.173 KB) | DOI: 10.24815/jn.v18i2.11133

Abstract

The patient dosing on Linac (Electa and Siemens) can be determined by Source Surface Distance (SSD) technique using Precentage Depth Doses (PDD) method. The study was conducted by measuring PDD to compare the dosage distribution calculations on Linac Electa and Siemens device of photon energy at 10 MV. PDD is done with a 100 cm SSD technique at a depth of 0 to 25 cm. The dose distribution results between the Electrical and the Siemens PDD are almost the same in that the Dmax at 10 MV Siemens photon energy occurs at a depth of 20 mm while the 10 MV Electa photon energy occurs at a depth of 21 mm. Both Linac Electa and Siemens device this at the same energy of 10 MV there is a difference of 95.23%.Keywords: Distrubusi dose, PDD, Photon Energy, Quality File Index
COMPARISON OF ENERGY DOSES 10 MV DISTRIBUTION USING PERCENTAGE DEPTH DOSE (PDD) METHOD ON LINAC: ELECTA AND SIEMENS Martha Rianna; Herty Afrina Sianturi; Hariyati Lubis; Awan Pelawi; Timbangen Sembiring; Marhaposan Situmorang
Jurnal Natural Volume 18, Number 2, June 2018
Publisher : Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24815/jn.v18i2.11133

Abstract

The patient dosing on Linac (Electa and Siemens) can be determined by Source Surface Distance (SSD) technique using Precentage Depth Doses (PDD) method. The study was conducted by measuring PDD to compare the dosage distribution calculations on Linac Electa and Siemens device of photon energy at 10 MV. PDD is done with a 100 cm SSD technique at a depth of 0 to 25 cm. The dose distribution results between the Electrical and the Siemens PDD are almost the same in that the Dmax at 10 MV Siemens photon energy occurs at a depth of 20 mm while the 10 MV Electa photon energy occurs at a depth of 21 mm. Both Linac Electa and Siemens device this at the same energy of 10 MV there is a difference of 95.23%.Keywords: Distrubusi dose, PDD, Photon Energy, Quality File Index
Analisa Pengendalian Sedimen Pada Daerah Irigasi (Studi Kasus Medan Amplas) Hariyati Lubis
Madani: Jurnal Ilmiah Multidisiplin Vol 2, No 4 (2021): Mei (edisi Cetak)
Publisher : Penerbit Yayasan Daarul Huda Kruengmane

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5281/zenodo.10828817

Abstract

One potential control strategy that supports the provision of agricultural facilities and infrastructure is water resource management. A weir is a type of building that is much smaller than other buildings, which causes water to pool to form a pool but is able to pass through the top of the weir, or mercu. Operation and Maintenance (O&M) activities of weir buildings are a weir construction problem that often occurs in Indonesia. The problem with the weir in Medan Amplas is that the weir pond cannot accommodate the volume of water because there is too much sedimentation. Irrigation systems are usually used to supply water from rivers to rice fields, so that plants do not lack water in the dry season and not too much water in the rainy season. Rivers in Indonesia usually carry sediment, both bottom sediment and floating sediment. Since the elevation at the river bed is +23.8, topographic measurements indicate that hydraulic flushing is not feasible. Meanwhile, the elevation at the end of the sand trap plan which allows flushing is + 22.6. Therefore, hydraulic flushing is not possible. Therefore, flushing will be done mechanically or manually. Due to the dominant type of sand sediment at the location, it is planned that sediment with a diameter of 0.140 mm will be deposited. By building mud bags, sediment will be collected first in the mud bags and will not enter the prime channel, so that the tamping capacity of the channel is not disturbed by sediment. As a result, urban irrigation areas can be irrigated.
Analysis and Characterization of Fe3O4/Silica Composite from Rice Husk Ash Susilawati, Susilawati; Lubis, Hariyati; Sembiring, Timbangen; Yanti, Jeddah; Pardede, Syahrani Nabilla; Napitupulu, Agnes Federova
Journal of Technomaterial Physics Vol. 6 No. 1 (2024): Journal of Technomaterial Physics
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/jotp.v6i1.15975

Abstract

In this investigation, Fe3O4/Silica composites were synthesized from rice husk ash utilizing the coprecipitation technique, aiming to elucidate the influence of variedheating temperatures on the surface morphology and elemental composition of the composites. Comprehensive characterizations were conducted employing FourierTransform Infrared (FTIR) Spectroscopy, X-ray Diffraction (XRD), and Scanning Electron Microscopy (SEM). These analyses unveiled a heterogeneous distributionof Fe3O4 nanoparticles and affirmed the amorphous characteristic of the silica constituent, with the XRD results prominently displaying a broad peak at approximately 2θ = 38°, signifying the amorphous nature. Despite the alterations in heating temperatures, SEM observations indicated a negligible effect on the nanoparticles' surface morphology, whereas notable variations were discerned intheir elemental composition. The outcomes of this study provide insightful contributions to the understanding of the structural properties of Fe3O4/Silica composites, suggesting avenues for refining synthesis methodologies for enhanced environmental and technological utilization.
Implementasi Model SMART Bisnis UMKM Pengrajin Olahan Limbah Rumah Tangga (Sampah Plastik) Melalui Galeri Bisnis Terpadu Pada Usaha Mila Accessories Kelurahan Tanah 600 Kecamatan Medan Marelan (Implementation of the SMART Model for MSME Business in Household Waste (Plastic Waste) Craftsmanship through an Integrated Business Gallery at Mila Accessories, Tanah 600 Village, Medan Marelan District) Batubara, Enika Diana; Harahap, Yenni Ramadhani; Lubis, Hariyati; Lubis, Renny; Rahmayati, Tengku Elfira
Indonesia Berdaya Vol 6, No 1 (2025)
Publisher : UKInstitute

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47679/ib.2025969

Abstract

Kekuatan ekonomi yang selama ini menjadi penunjang ekonomi negara Indonesia maupun daerah adalah kehadiran pelaku usaha, mikro, kecil dan menengah (UMKM). Saat ekonomi dunia dan Indonesia mengalami resesi, justru pelaku UMKM tidak sedikit pun terkena dampak negative resesi ekonomi tersebut. Kreativitas dan kemampuan masyarakat dalam menyalurkan ide dan kreasinya dengan memanfaatkan sumber daya yang tersedia diwujudkan dalam beragamnya produk UMKM. UMKM kerajinan tangan dari olahan limbah rumah tangga yang ada di Kota Medan khususnya Kelurahan Tanah 600 Kecamatan Medan Marelan yaitu Mila Accessories, dimana usaha ini tetap survive sejak 2012 dengan jumlah pegawai sebanyak 5 orang secara system pengupahan borongan yang direkrut dari tetangga sekitar. Usaha ini juga mampu melewati berbagai kesulitan usaha seperti dampak pandemic Covid 19 yang baru ini terjadi. Permasalahan utama yang menjadi kendala usaha mitra Malaya Nst berupa pemasaran manajemen usaha (keuangan) dan legalitas usaha. Solusi yang tim pengabdian berikan untuk mengatasi kendala usaha diatas dengan merancang dan membangunkan sebuah gallery bisnis bersifat offline dan online yang dikemas menjadi gallery bisnis yang dibuat dengan konsep terpadu antara offline dan online dalam bentuk “Smart Bisnis Gallery Malaya Nst”. Gallery bisnissecara offline dilengkapi dengan dekorasi sebagian ruangan usaha yang ada di rumah ibu Kumalawaty sebagai pemilik usaha Malaya NST, dekorasi steeling yang sudah ada sebelumnya, mendesign meja pribadi menjadi meja kantor sekaligus meja demo produksi, Banner, Spanduk Usaha, Plank Papan Usaha. Adapun meja kantor disediakan perlengkapan manajemen usaha dan perangkat keuangan seperti kwitansi, faktur, bukukas, buku besar, perlengkapan ATK, kalkulator, buku pedoman Standar Akuntansi Keuangan (SAK), dll. Gallery bisnis secara online berupa upgrade media social usaha mitra yang berbayar untuk menarik jumlah viewr atau followers seperti pemasangan Facebook Advs, Tiktok berbayar, Instagram Insight dan beberapa perlengkapan alat untuk pembuatan video konten usaha seperti tripod lighting yang dibuat untuk Live Streaming dengan latar dari gallery offline yang sudah di dekorasi. Tutorial penggunaan Smart Bisnis Gallery Malaya Nst ini dilakukan tim pengabdian kepada mitra melalui beberapa tahapan yaitu : a) persiapan perlengkapan dan bahan galley bisinis offline dan online; b) melakukan pembersihan dan pembangunan untuk pendekorasian gallery bisnis offline dan online; c) melakukan Sosialisasi Pelatihan kepada mitra tentang penggunaan Smart Bisnis Gallery Malaya Nst (secara terpadu antara offline dan online); d) melakukan Pamerandan Launching Smart Bisnis Gallery Bisnis Malaya Nst yang diresmikan oleh Wakil Rektor I Universitas Amir Hamzah dan Lurah Tanah 600 Medan dan dihadiri oleh mitra, tim pengabdian, pelaku UMKM dan masyarakat setempat. Impact Smart Bisnis Gallery Malaya Nst terhadap usaha mitra mengalami peningkatan terhadap pemasaran dan penjualan yang dibuktikan dengan meningkatnya jumlah orderan penjualan saat pameran berlangsung, produk dikenal dari pihak kelurahan dan mendapat orderan untuk kelengkapan kelurahan, terjadi peningkatan viewers/followers, jumlah like n coomment di media social mitra, mendapat tawaran pembinaan UMKM dari kelurahan. Untuk bidang legalitas sedang berproses untuk pendaftaran hak merk usaha mitra di lembaga terkait, dimana nama merk yang sedang proses pendaftaran Hak Merk yaitu Malaya Nst.Abstract. The economic strength that has been supporting the economy of Indonesia and the regions is the presence of micro, small and medium enterprises (MSMEs). When the world economy and Indonesia experienced a recession, MSMEs were not affected in the least by the negative impact of the economic recession. The creativity and ability of the community to channel their ideas and creations by utilizing available resources are manifested in a variety of MSME products. MSME handicrafts from household waste processing in Medan City, especially in Tanah 600 Village, Medan Marelan District, namely Mila Accessories, where this business has survived since 2012 with 5 employees using a piecework wage system recruited from neighbors. This business is also able to overcome various business difficulties such as the impact of the recent Covid 19 pandemic. The main problems that are obstacles to Malaya Nst's partner businesses are marketing, business management (finance) and business legality. The solution that the community service team provides to overcome the above business obstacles is by designing and building an offline and online business gallery which is packaged into a business gallery created with an integrated concept between offline and online in the form of "Smart Business Gallery Malaya Nst". The offline business gallery is equipped with decoration of some of the business rooms in Mrs. Kumalawaty's house as the owner of the Malaya NST business, decoration of the existing steeling, designing a personal table into an office table as well as a production demo table, Banners, Business Banners, Business Board Planks. The office table is provided with business management equipment and financial tools such as receipts, invoices, cash books, ledgers, stationery equipment, calculators, Financial Accounting Standards (SAK) manuals, etc. The online business gallery is in the form of a paid upgrade of partner business social media to attract the number of viewers or followers such as installing Facebook Advs, paid Tiktok, Instagram Insight and some equipment for making business content videos such as lighting tripods made for Live Streaming with a background from the decorated offline gallery. This tutorial on using the Malaya Nst Smart Business Gallery is carried out by the service team to partners through several stages, namely: a) preparation of equipment and materials for offline and online business galleys; b) cleaning and building for decorating offline and online business galleries; c) conducting Training Socialization to partners on the use of the Malaya Nst Smart Business Gallery (integrated between offline and online); d) Conducting an Exhibition and Launching of the Malaya Nst Smart Business Gallery Business which was inaugurated by the Vice Chancellor I of Amir Hamzah University and the Head of Tanah 600 Medan and attended by partners, community service teams, UMKM actors and the local community. The impact of the Malaya Nst Smart Business Gallery on partner businesses has increased in marketing and sales as evidenced by the increasing number of sales orders during the exhibition, products are known from the village and receive orders for village equipment, there is an increase in viewers/followers, the number of likes and comments on partner social media, receiving offers of UMKM coaching from the village. For the legality sector, the registration of partner business trademark rights is currently in progress at the relevant institution, where the brand name that is in the process of registering Trademark Rights is Malaya Nst.
Comparative Analysis of Gasoline and Liquefied Petroleum Gas (LPG) on Motorcycle Engine Performance Yamin, Octo Muhammad; Nasution, Devi Maiya Sari; Noer, Zikri; Lubis, Hariyati; Sofie, Tengku Machdhalie
Journal of Technomaterial Physics Vol. 6 No. 2 (2024): Journal of Technomaterial Physics
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/jotp.v6i2.18270

Abstract

This research aims to determine the efficiency of LPG fuel performance compared to gasoline in motorcycle engines. The research method involves a brake dynamometer test with engine speed variations of 2000 rpm, 2200 rpm, and 2500 rpm. Based on the results obtained, the exhaust gas temperature (°C) at an engine speed of 2000 rpm with gasoline is 148°C and 146°C, while with LPG, it is 107°C and 108°C. The fuel consumption rate (cc/min) at 2000 rpm is 15.8 cc/min, 16.2 cc/min with gasoline, and 9.36 cc/min with LPG. At 2200 rpm, the fuel consumption is 16.2 cc/min, 22.8 cc/min with gasoline, and 10.48 cc/min with LPG. At 2500 rpm, it is 20.2 cc/min, 19.4 cc/min with gasoline, and 14.40 cc/min with LPG. In terms of fuel consumption savings, using LPG as a fuel can significantly reduce fuel usage.
Co-Authors Agung Imaduddin Agus, Muhammad Abduh Akram Awan Pelawi Batubara, Enika Diana Devi Maiya Sari Nasution Eddy Marlianto Efendi, Syahril Eidi Sihombing Eidi Sihombing Eidi Sihombing Hasibuan , Edi Sarman Hasibuan, Edi Sarman Herty Afrina Sianturi Idamayanti, Dewi Irma, Mutia Jeddah Yanti Lubis, Kurniawan Lubis, Renny Marhaposan Situmorang Martha Rianna Merpiseldin Nitsae Muhammad Zarlis Napitupulu, Agnes Federova Nasution, Devi Maiya Sari Noer, Zikri Pardede, Syahrani Nabilla Perdinan Sinuhaji Pius Sebleku Rafly Ihsan As Siddiq, Muhammad Rahmayati, Tengku Elfira Rika Permata Sari Siregar Rinaldi, Fajar Sari Nasution, Devi Maiya Sianturi, Josten Sihombing, Gunawan Siregar , Irpansyah Siregar, Irpansyah Sofie, Tengku Machdhalie Susanti, Rika Deni Susilawati Susilawati, Susilawati Timbangen Sembiring Yamin, Octo Muhammad Yenni Ramadhani Harahap