Claim Missing Document
Check
Articles

Found 32 Documents
Search

Titik Equilibrium Bebas dari Penyebaran Hoax Pemilu Lewat Media Sosial Tiktok Anna Angela Sitinjak; Switamy A. Purba; Ferdinan Rinaldo Tampubolon; Dimas Frananta S; Naqasya Asyrori Sidabutar
MAJAMATH: Jurnal Matematika dan Pendidikan Matematika Vol. 7 No. 2 (2024): Vol. 7 No. 2 September 2024
Publisher : Prodi Pendidikan matematika Universitas Islam Majapahit (UNIM), Mojokerto, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36815/majamath.v7i2.3209

Abstract

Election issues are sensitive information among the society because they relate to people's survival in terms of work, economy and education. Election hoaxes where information whose truth cannot be ascertained becomes a weapon used by certain parties to bring down political opponents. Social media such as TikTok is a media that is often used to spread hoaxes because TikTok social media users come from various ages and there is no distance or time between users. In this paper, a mathematical model is presented to see how the equilibrium point is to be free from hoax based on the basic reproduction number R0. The spread of hoaxes on social media occurs if R0 > 1 and does not occur if R0 < 1. The model approach used is the SEIR mathematical model because it is seen that there are people who receive hoax videos (exposed) and then spread them without finding out the truth (infected), and users with this condition it needs to be recovered. The method used in this research is a literature review. The results obtained show that the mathematical model presented shows that the basic reproduction number R0 is zero (R0 < 1). This means that there will be no spread of election hoaxes
Analysis of Pressure Loss for Treatment Process of Demineralized Water at the Water Treatment Plant Unit at PT. ABC North Sumatra Donda Donda; Darni Paranita; Dimas Frananta Simatupang
Justek : Jurnal Sains dan Teknologi Vol 7, No 1 (2024): Maret
Publisher : Unversitas Muhammadiyah Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31764/justek.v7i1.20412

Abstract

Abstract: For the demineralized water treatment process, the water from the Portable Water Pound is pumped to the Reverse Osmosis system by a centrifugal pump. The pump provides the necessary force for the fluid to reach the Reverse Osmosis system. In a piping system, fluid flow in water treatment industries experiences pressure drop. The objective of this research is to determine the pressure loss and Reynolds number. The method includes calculating flow rate, Reynolds number, and pressure loss. The research results indicated that in a pipe diameter of 15 cm with a total pipe and fitting length of 5.0303 m, the average Reynolds number with an average fluid flow rate of 20.8 m3/hour was 61,411.46 (turbulent flow). Meanwhile, in a 10 cm diameter pipe with a total pipe and fitting length of 27.2228 m and the same average fluid flow rate, the Reynolds number was 86,671.40 (turbulent flow). The total pressure loss obtained at a temperature of 32°C is 323,382.68 Pa. The water flow rate has a positive relationship with the pressure loss in the pipe. The higher the flow rate, the greater the pressure loss. The Reynolds number also increases with the flow rate, indicating that higher flow rates result in higher Reynolds numbers and turbulence in the flow.Abstrak: Untuk proses pengolahan air demineral, air dari Portable Water Pound yang dipompakan menuju Reverse Osmosis membutuhkan tenaga yang diberikan oleh pompa. Pompa yang digunakan ialah pompa sentrifugal. Air yang dipompakan menuju Reverse Osmosis membutuhkan tekanan dari pompa sentrifugal tersebut agar fluida bisa sampai ke dalam Reverse Osmosis. Dalam suatu sistem perpipaan, aliran fluida dalam industri pengolahan air mengalami penurunan tekanan. Tujuan dari penelitian ini adalah untuk menentukan kehilangan tekanan dan bilangan Reynold. Metode yang digunakan meliputi perhitungan debit aliran, bilangan Reynolds, dan kehilangan tekanan. Hasil penelitian menunjukkan bahwa pada diameter pipa 15 cm dengan panjang pipa dan fitting 5,0303 m menghasilkan rata-rata bilangan Reynold dengan debit fluida rata-rata sebesar 20,8 m3/jam sebesar 61.411,46 (turbulensi). Sementara itu, pada diameter 10 cm dengan panjang pipa dan fitting 27,2228 m menghasilkan rata-rata bilangan Reynold dengan debit fluida yang sama sebesar 86.671,40 (turbulensi). Kehilangan tekanan total yang diperoleh pada suhu 32 0C adalah sebesar 323.382,68 Pa. Debit aliran air memiliki hubungan positif dengan kehilangan tekanan dalam pipa. Semakin tinggi debit aliran, semakin besar kehilangan tekanan yang terjadi. Bilangan Reynolds juga berbanding lurus dengan debit aliran, yang menunjukkan bahwa semakin besar debit aliran, semakin besar pula nilai Reynolds dan aliran akan mengalami turbulensi.