Journal of Science and Application Technology (JSAT - Institut Teknologi Sumatera)
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Metode Runge-Kutta Orde 4 Dalam Penyelesaian Persamaan Gelombang 1D Syarat Batas Dirichlet
Get PDFThe problem studied in this study was the movement of deviations in the equation of 1D waves on the rope given the initial deviation value. In this study, the equation of 1D waves with dirichlet boundary problems will be solved analytically using variable and numerical separation using the runge-kutta method approach of order 4. This research begins with examining equation models, solving analytical solutions, applying schemes to the final results of simulations. The decrease in equation model fissile is done by reviewing the working force on a piece of rope, solving an analytical solution with a variable separation method, and numerical completion resulting in the best simulation result with parameter c= 0.5 with time steps ∆x= 0.01 and time interval of 0 ≤ t≤ 1 resulting in a numerical approach close to its analytical solution up to t= 1 s and the influence of parameter c on the movement of wave deviations resulted in that the influence of parameter c affects the magnitude of the deviation of the wave, so the greater the value of parameter c, the smaller deviation of the wave and the faster the speed of the direction. Thus, it can be concluded that the runge-kutta method of order 4 in this study can be said to be one of the numerical approaches of the problem of 1D wave equations with dirichlet boundaries
Aplikasi Teknologi Sanitasi dari Daun Pepaya dan Pengemasan Tusuk Bakso di Desa Karang Anyar, Lampung Timur
No full textMesin tusuk bakso hasil pengabdian tahun 2020 berhasil meningkatkan efisiensi dan jumlah produksi mitra. Walaupun demikian, tusuk bakso masih dapat terkontaminasi kapang perusak dan penghasil toksin. Oleh karena itu, teknologi sanitasi serta pengemasan perlu diaplikasikan. Tahapan pengabdian meliputi perencanaan, pelaksanaan, serta evaluasi pengabdian. Persiapan diawali dengan mendesain logo, menyiapkan plastik, sealer, sarung tangan, serta bahan sanitizer. Teknologi sanitasi yang digunakan berupa sanitizer dari daun papaya kering yang dilarutkan pada air panas dan digunakan setelah dingin dengan cara spray pada tusuk bakso sebelum penjemuran. Pengabdian dilaksanakan di Desa Karang Anyar, Lampung Timur pada Sabtu, 18 September 2021. Tahapan pelaksanaan meliputi pre-test, diskusi dengan mitra, aplikasi teknologi sanitasi dari bahan alam, aplikasi pengemasan dengan plastik dan sticker logo, serta post-test. Hasil pengabdian menunjukkan pemahaman terkait aplikasi teknologi sanitasi dari bahan alam meningkat namun tidak pada pemahaman terkait teknologi pengemasan
PEMODELAN MASTER PLAN DAN DETAIL ENGINEERING DESIGN UNTUK PERUMAHAN CLUSTER BERBASIS BUILDING INFORMATION MODELING (Studi Kasus : Kota Bengkulu)
No full textPerumahan dan hunian merupakan wadah yang sangat penting untuk kehidupan manusia. Selain tempat untuk beristirahat, rumah juga dijadikan sebagai tempat berkumpul dengan keluarga. Pertumbuhan penduduk di daerah perkotaan yang semakin meningkat mengakibatkan kebutuhan akan tempat tinggal atau hunian juga akan semakin meningkat. Saat ini para developer saling berlomba untuk membuat konsep dan desain yang menarik yang meliputi aspek seperti arsitektur, biaya, mutu dan waktu pelaksanaan. Oleh sebab itu, sesuai dengan kemajuan ilmu pengetahuan dan teknologi, penggunaan BIM dalam pelaksanaan proyek sudah mulai digunakan karena dengan penerapan BIM dapat mempermudah dan mempercepat proses pekerjaan proyek. Hasil dari pemodelan perumahan cluster dan perancangan DED Berbasis BIM pada tpenelitian tugas akhir ini didapatkan besar volume galian sebesar 37233.27 m3 dan volume timbunan sebesar 37233.60 m3, total pekerjaan beton sebesar 1947.1133 m3 dan pekerjaan pembesian sebesar 43.9432 m3
REDUKSI SELEKTIF UNTUK NIKEL LATERIT MENGGUNAKAN NATRIUM KLORIDA DAN ARANG CANGKANG SAWIT DILANJUTKAN DENGAN PEMISAHAN MAGNETIK
Get PDFTeknik pengolahan bijih nikel laterit melalui metode pirometalurgi masih terus dikembangkan untuk menghasilkan produk ferronikel kadar tinggi dengan konsumsi energi rendah. Salah satu metode tersebut adalah reduksi selektif yang dilanjutkan dengan pemisahan magnet. Umumnya metode ini menggunakan batubara sebagai reduktor, namun karena batubara merupakan sumber energi tidak terbarukan serta tidak ramah lingkungan, maka perlu dicari reduktor alternatif, salah satunya adalah biomassa berupa arang cangkang sawit. Penelitian ini mempelajari pengaruh fraksi ukuran bijih nikel laterit dan kuat medan magnet dalam proses reduksi bijih nikel laterit menggunakan aditif NaCl dan reduktor arang cangkang sawit. Aditif NaCl sebanyak 10% berat dan reduktor arang cangkang sawit sebanyak 5% berat ditambahkan ke bijih nikel laterit (dengan variasi ukuran -60+80#, -80+100#, dan -100#). Ketiga material tersebut dibentuk menjadi pellet berukuran diameter 10-15 mm. Pellet tersebut direduksi pada temperatur 950˚C, 1050˚C, dan 1150˚C menggunakan muffle furnace selama 60 menit. Selanjutnya pellet yang telah direduksi tersebut dilakukan pemisahan magnetik secara basah (menggunakan variasi kuat medan magnet 500G, 1000G, dan 1500G) untuk memperoleh konsentrat feronikel (magnetik) dan tailing (non-magnetik). Hasil penelitian memperoleh bahwa kadar nikel yang tinggi (2,9%) dihasilkan pada kondisi temperatur reduksi tinggi (1150 ˚C), ukuran partikel bijih nikel laterit -60+80#, dan kuat medan magnet 1000G
Evaluasi CPPB IRT dan Penyusunan Rekomendasi HACCP pada UMKM Tempe a-Zaki di Bandar Lampung
Get PDFTempeh is a fermented food composed primarily of soybeans that is a nutrient-dense, cost-effective, and sustainable functional source of protein. Tempeh production, especially in Indonesia, is done usually in household scale. For its development, the producers should be maintaining their product quality, especially in food safety management such as good manufacturing pratices (GMP) and Hazard Analysis Critical Control Point (HACCP). The objectives of this study was to identify the suitability of GMP implementation and to compose HACCP plan. This study took place in a-Zaki tempeh household producer in Bandar Lampung. This study was conducted with descriptive quantitative approach. Primary data (observations and interviews) and secondary were collected as the information.. For GMP evaluation, the obtained data was compared with the regulation of food and drug regulatory agency. The result showed that a-zaki tempeh household producer were categorized into level III of IRTP due to 10 minors deviations, 3 major deviations, 4 serious deviations, and 0 critical deviations so that an internal audit needs to be held every 2 weeks. For HACCP, the producer had not yet designed and implemented HACCP plan
POLA SPASIAL DAN TREN KEMISKINAN DI INDONESIA TAHUN 2015-2020
Get PDFThe National Medium Term Development (RPJMN) 2020-2024 prioritizes the concept of Sustainable Development (SDGs) and the main target is poverty, this indirectly means that poverty is an important thing that must be prioritized for handling. Achieving common prosperity is a reflection of the success of development that is expected by every country in general, including Indonesia. Prosperity can be measured by a decrease in the level of poverty which if the prosperity of an area increases, it means that there is a decrease in the level of poverty. This paper aims to map the pattern of poverty at two points in time, namely 2015 and 2020 between regions in Indonesia. In mapping poverty patterns and trends, the spatial analysis method is used to determine the distribution pattern of poverty between regions in Indonesia. As a result, there are various patterns of poverty ranging from very low to very high class, with poverty in the east being higher than in the west. Based on the changing trend, regions with high poverty rates such as Papua Island actually had the largest poverty reduction from 2015 to 2020 but this has not been able to change their position into regions with the highest poverty rates
Evaluasi Pemanfaatan Ruang Kabupaten Lampung Selatan Tahun 2012-2017
Get PDFLand use in South Lampung Regency continues to experience development, which is influenced by rapid population growth within five years after the planning year began in 2010. Various types of land-use changes that have occurred in South Lampung Regency indicate in the spatial changes of South Lampung Regency, which has been planned especially in the Regional Spatial Plan (RTRW) of South Lampung Regency for 2011-2031, one of which is the plantation area (belonging to PTPN VII) to become land for ITERA. There are preventive measures that can be made so that the spatial plan can still be following its development objectives. It is necessary to research by evaluating South Lampung Regency's spatial use based on its spatial plan, especially by RTRW. Based on the analysis, there is a deviation of land use in South Lampung Regency with 48.46%, which is divided into spatial structure plans and spatial pattern plans
Peningkatan Kinerja Microgrid Bangunan Kampus dengan Simulasi Multi Skenario dan Analisis Sensitivitas
Get PDFPenelitian ini mengevaluasi kinerja microgrid cerdas dengan tujuan untuk meningkatkan ketersediaan pasokan listrik dan renewable fraction (RF). Evaluasi dilakukan dengan simulasi multi skenario yang mencakup produksi dan konsumsi energi. Simulasi dibagi tiga, yaitu skenario dasar, skenario uji, dan skenario rekomendasi. Skenario uji terdiri dari uji kapasitas sistem, penggantian komponen, dan analisis sensitivitas. Didapatkan dari skenario dasar bahwa ketersediaan pasokan listrik selama setahun telah terpenuhi, dengan RF 30,5%; cost of energy (CoE) Rp2.019/kWh; dan waktu otonomi baterai (WOB) 11,1 jam. Dari hasil analisis didapatkan beberapa rekomendasi berupa penggantian komponen baterai dan modul surya, penambahan kapasitas baterai, dan pengaturan batas state of charge (SoC) pada baterai untuk meningkatkan RF. Skenario rekomendasi tersebut berhasil meningkatkan ketersediaan pasokan listrik dan mencapai target dengan nilai WOB sebesar 37 jam dan RF sebesar 46,4% pada awal siklus hidup proyek; serta WOB sebesar 25,5 jam dan RF sebesar 29,1% pada akhir tahun ke 25, dengan CoE sebesar Rp6.448/kWh. Analisis sensitivitas operasi baterai lead-acid menunjukkan bahwa untuk mendapatkan RF maksimal rentang pengaturan SoC berada pada 0-20%. Sedangkan untuk baterai Li-Ion, rentang SoC adalah 0-25%
Study of Thermoelectric Generator Utilization to Recover Heat at Low Temperature Grade Application: A Review
Get PDFGenerally, the supply of heat energy is abundant in this world especially from direct solar radiation or combustion process activity. However, this energy is mostly wasted and discharged to the environment without recovery and re-utilization process. There is a potential utilization this heat to be converted to electricity using thermoelectric generator (TEGs). This technology device has an ability to convert heat to electricity by difference temperature from both surfaces. This device could prevent thermal loss to environment and optimize the system to generate electricity for small and micro scale power generation. This research conducts a literature review about identifying several potential object application or equipment as heat sources from solar energy or combustion activity combine with thermoelectric generator at low grade temperature that has been worked by previous researcher for past 5 years. Current status and working principal of thermoelectric generator is presented briefly. Several parameters such as working temperature range, potential output power, and efficiency system are described and presented. Then, some implementation challenge and opportunity development combination TEGs with each object applications are discussed and analyzed to produce recommendation for further researc