Claim Missing Document
Check
Articles

Found 2 Documents
Search

SISTEM INFORMASI PENJUALAN SPAREPART MOBIL BERBASIS WEB PADA CV.CIPTA MANDIRI JAYA Wijaya, Vivi; Nababan, Marlince Novita Karoseri
JURNAL SAINS DAN TEKNOLOGI Vol. 1 No. 2 (2020): Sains dan Teknologi
Publisher : Sisfokomtek

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (523.956 KB)

Abstract

The spare parts that are currently running are less efficient because during the process of selling and recording the spareparts that require a long time, the management of the unbalanced company that is taking place in Cipta Mandiri Jaya is one of thecompanies that sell car parts. The existence of a debate, then we need an information system that can help smooth operational processes.The purpose of designing this system is to provide the required report information quickly for CV. Cipta Mandiri Jaya. Informationsystems for sales of goods are designed using the PHP programming language and MySQL as the database. The application that canreduce and minimize the problem of counting, makes it easier to make purchases, sales and purchase transactions more effectively andefficiently and is supported by a high level of data security
Sifat Listrik Material Ferroelektrik Barium Titanat (BaTiO3) dengan Doping Cerium (Ce) Wijaya, Vivi; Elvaswer, Elvaswer
Jurnal Fisika Unand Vol 10, No 1 (2021)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jfu.10.1.111-116.2021

Abstract

Pembuatan material ferroelektrik Barium Titanat (BaTiO3) didoping cerium (Ce) telah dilakukan. Pemberian variasi komposisi doping dilakukan untuk mengetahui nilai konstanta dielektrik, rugi-rugi dielektrik, tingkat kekeristalan serta ukuran kristal tiap sampel. Sampel dibuat menggunakan metode solid state reaction dengan persentase doping Ce 0%, 1%, 2%, 3%, 4% dan 5% mol yang dikompaksi dalam bentuk pelet. Satelah sampel disintering pada suhu 700°C selama 4 jam, dilakukan karakterisasi menggunakan RLC meter dengan variasi frekuensi 100 Hz, 120 Hz dan 1 KHz dan karakterisasi XRD. Diperoleh hasil bahwa pengaruh doping menaikkan nilai konstanta dielektrik pada komposisi doping 1% mol pada frekuensi 100 Hz dengan nilai konstanta dielektrik sebesar 4220. Pada komposisi  doping 1% ini juga ditemukan nilai faktor desipasi tertinggi yaitu sebesar 4,45. Pada uji XRD ditemukan  komposisi doping 1% memiliki nilai tingkat kekristalan yang lebih besar dari komposisi doping 3% yaitu sebesar 89% Dielectric is a material that is widely developed in technology, especially in applications as capacitors. A study entitledthe effect of the doping composition of cerium (Ce) on barium titanate (BaTiO3) for the dielectric constant and the cyrstal structure ofBa1-xCexTiO3has been conducted. This study aims to determine the effect og giving the doping composition Ce (x=1%, 2%, 3%, 4%, 5%) on BaTiO3, knowing the dissipation factor and the dielectric constant ofBa1-xCexTiO3.The solid state reaction method wasused in this study by reacted the solids in form of powders at a high temperature 750°C for 4 hours. The RLC meter is used to measure the capacitance and then it is processed and the highest dielectic constant and highest dissipation factor are obtained at the 1% doping composition of 55389,387 with a dissipation factor 2,74. The crystal structure was analyzed using xrd, and the highesst intensity results were in composition at 1% doping and 152,84. The hightest crytallinity formed was 89,11 but the largest crystal size was obtained in composition 3% doping is 36,7549 nm